| E
| Electromotive force |
| E Cell
| A cell which consists of a cathode made of silver and an anode made of gold. As current passes through is, a chemical reaction takes place, which causes the silver in the cathode to be deplated to the gold in the anode |
| E-cam
| A pattern used to grind pistons in an oval or cam shape. |
| e-mail
| A popular term for electronic mail; the transmission of messages over a communications network. |
| E-MOSFET
| (enhancement metal oxide semiconductor field effect transistor) This transistor can be operated in the enhancement mode only |
| E-PROM
| An acronym for erasable programmable read-only memory. |
| E-Town
| A popular term for English town. |
| E4OD
| Electronic four-speed overdrive |
| E85
| A fuel blend of 85% ethanol and 15% gasoline. |
| ea
| An acronym for each. |
| EABCV
| Electronic air bleed control valve |
| EAC
| [1] Electric assist choke or electric air control valve [2] Electric Air Control : Used on the AIR system to direct air flow to air switching valve of the air cleaneer |
| EAC&EAS
| Electric air control valve & electric air switch valve |
| EAC&LACN
| Electric air control valve & low vac air control valve |
| EACV
| Electric air control valve |
| EADV
| Electric air divert valve |
| EAIR
| Electric air injection reaction |
| EAM
| Electronic air management |
| EAP
| Electronic air pump |
| early apex
| Getting to the inside of a turn sooner than usual. |
| early fuel evaporation
| A system that evaporates fuel in the intake manifold with the use of heat from the exhaust, or an electrical element to improve the engine's cold-running characteristics and to reduce emissions. |
| EAS
| An acronym for electronic air suspension. |
| easy exit
| A system that provides for easy entrance and exit of the vehicle by moving the seat all the way back and down. Some systems may also move the steering wheel up and to full retract. |
| EAT
| Electronic automatic transaxle |
| EATC
| Electronic automatic temperature control |
| EATX
| Transmission Control Module (Chrysler ) |
| EAVS
| Electronically actuated vacuum switch |
| EBCM
| 1. An acronym for electronic brake control module. 2. A component of a General Motors electronically controlled brake system used on some of their car lines. |
| EBCV
| Electronic bleed control valve |
| EBL
| Electric back-lite: this term refers to the heated rear window system |
| EC
| Electric choke |
| ECA
| An acronym for electronic control assembly. |
| ECAS
| Electronic control air sensor |
| ECAT
| Electronically controlled automatic transaxle |
| ECC
| An acronym for electronic climate control. |
| eccentric
| 1. Not round, or concentric 2. An offset, such as a disc, used to convert rotary motion into reciprocation motion, as in a cam lobe. 3. The relationship of two round parts having different centers, a part that contains two round surfaces, not on the same center. |
| eccentric bearing
| A bearing that is thicker at the crown by a few ten thousandths of an inch. |
| eccentric shaft
| 1. The crankshaft of a Wankle engine. 2. A shaft with eccentric offsets, such as a camshaft. |
| eccentricity
| A condition whereby two or more round parts or holes do not share the same central axis. |
| ECCS
| An acronym for 1. Electronic computer control system. 2. Electronic concentrated control system. 3. Electronic constant control system. |
| ECE
| Economic Commission of Europe |
| ECES
| Electronic control/electric switching |
| ECI
| An acronym for electronic controlled ignition. |
| ECM
| An acronym for electronic control module. The on-board computer that controls fuel delivery, emissions, and on-board diagnostics, for the vehicle's engine management systems. |
| econobox
| A small compact car. |
| economizer
| A device in a carburetor that reduces fuel consumption, particularly under heavy throttle. |
| economy of motion
| Minimum effort required to do a task. |
| econorail
| A dragster with a single, normally aspirated gasoline engine. |
| ECS
| An acronym for 1. Electronic control system. 2. Evaporative control system. |
| ECT
| An acronym for 1. Electronic controlled transmission. 2. Engine coolant temperature. |
| ECTS
| An acronym for engine coolant temperature sensor. |
| ECTV
| Emission control thermostat valve |
| ECU
| An acronym for electronic control unit. |
| ECVT
| Electro-continuously variable transmission |
| eddy current
| Currents induced in conducting materials by varying magnetic fields; Sometimes used with dynamiters for fast accurate current changes. |
| EDF
| Electro-drive fan |
| edge loading
| A condition that exists when two parts rub together at their edges. |
| EDIS
| An acronym for electronic distributorless ignition system. |
| edit
| 1. To check the correctness of data. 2. To change, as necessary, the form of data by adding or deleting certain characters. |
| editor
| A program permitting the user to create new data files or to alter existing data files. |
| EDM
| Electric distributor modulator |
| EDRS
| An acronym for Electronic Data Retrieval System. Any computer basted information system such as Mitchell On-Demand, Alldata, est. |
| EDS
| An acronym for Electronic Diesel System |
| EEC
| [1] An acronym for European Economic Community [2] An acronym for Evaporative emission control [3] An acronym for Electronic engine control |
| EEC-I
| An early Ford electronic engine control that only controlled ignition advance and retard. |
| EEC-III
| An early 1980 Ford electronic microprocessor engine-control system. |
| EEC-IV
| A Ford electronic engine-control system using sequential port fuel injectors. |
| EECS
| An acronym for evaporative emissions control system. |
| EEGR
| Electronic exhaust gas recirculation |
| EEPROM
| An acronym for electronically erasable programmable read only memory. |
| EET
| Electronic exhaust gas recirculation transducer |
| EFC
| An acronym for 1. Electronic fuel control. 2. Electronic feedback carburetor. |
| EFE
| Early Fuel Evaporation |
| EFE-CV
| Early fuel evaporation -control valve |
| EFE-DTVS
| Early fuel evaporation-delay thermal vacuum switch |
| EFE-HCV
| Early fuel evaporation-heat control valve |
| EFE-OTS
| Early fuel evaporation-oil temperature switch |
| EFE-PTC
| Early fuel evaporation-positive temperature coefficient |
| EFE-PVS
| Early fuel evaporation-ported vacuum switch |
| EFE-TVS
| Early fuel evaporation-thermal vacuum switch |
| EFE-TVV
| Early fuel evaporation-thermal vacuum valve |
| EFE-VSV
| Early fuel evaporation-vacuum switching valve |
| Effective Bits
| A measure of a digital oscilloscope's ability to accurately reconstruct a sign wave signal's shape. This measurement compares the oscilloscope's actual erroe to that of a theoretical ideal digitizer |
| efficiency
| The output of energy divided by the input of energy, expressed in percentage. |
| EFI
| Electronic fuel injection |
| EFI-MA
| Electronic fuel injection-mass airflow |
| EFM
| Electronic fuel monitoring |
| egg crate
| A cross-hatch grille design. |
| EGI
| Electronic Gasoline Injection : This is a Mazda's fuel injection system used on RX7, 323 and 626 models |
| EGO
| Exhaust gas oxygen |
| EGOG
| EGO signal return with separate grounds on the engine block |
| EGR
| An acronym for exhaust gas recirculation. |
| EGR system
| An EGR valve, mounted on the intake manifold, that meters a small amount of exhaust gas into the intake manifold to dilute the air/fuel mixture. This keeps combustion temperatures below 2,500 degree F and reduces the formation of Nox. The amount of exhaust gas reticulated into the engine is only a few percent. |
| EGR valve
| An acronym for exhaust gas recirculation valve. |
| EGR valve-position sensor
| A potentiometer that keeps the engine control computer informed relative to the EGR valve position. |
| EGR-BPBV
| Exhaust gas recirculation-bypass back pressure valve |
| EGR-BPV
| Exhaust gas recirculation-bypass valve |
| EGR-BS
| Exhaust gas recirculation-bleed solenoid |
| EGR-BVSV
| Exhaust gas recirculation-bimetal vacuum switching valve |
| EGR-CC
| Exhaust gas recirculation-coolant controlled |
| EGR-CS
| Exhaust gas recirculation-coolant solenoid |
| EGR-CTO
| Exhaust gas recirculation-coolant temperature override |
| EGR-CTS
| Exhaust gas recirculation-charge temperature sensor |
| EGR-CTTS
| Exhaust gas recirculation-coolant temperature thermo-switch |
| EGR-CV
| Exhaust gas recirculation-control valve |
| EGR-CVCV
| Exhaust gas recirculation-constant vacuum control valve |
| EGR-CVS
| Exhaust gas recirculation-control vent solenoid |
| EGR-DC
| Exhaust gas recirculation-digital control |
| EGR-DCTO
| Exhaust gas recirculation-dual coolant temperature override |
| EGR-DPFE
| Delta Pressure Feedback Exhaust Gas Recirculation system |
| EGR-DTVS
| Exhaust gas recirculation-delay thermal vacuum switch |
| EGR-DV
| Exhaust gas recirculation-delay valve |
| EGR-EPRS
| Exhaust gas recirculation-exhaust pressure regulator solenoid |
| EGR-EPRV
| Exhaust gas recirculation-exhaust regulator valve |
| EGR-EPV
| Exhaust gas recirculation-external pressure valve |
| EGR-ESS
| Exhaust gas recirculation-engine speed sensor |
| EGR-EVRV
| Exhaust gas recirculation-electronic vacuum regulator valve |
| EGR-FDV
| Exhaust gas recirculation-forward delay valve |
| EGR-FJS
| Exhaust gas recirculation-floor jet system |
| EGR-LCV
| Exhaust gas recirculation-load control valve |
| EGR-PS
| Exhaust gas recirculation-position sensor |
| EGR-PVS
| Exhaust gas recirculation-ported vacuum switch |
| EGR-S/O
| Exhaust gas recirculation-shut off |
| EGR-SC
| Exhaust gas recirculation-signal converter |
| EGR-TC
| Exhaust gas recirculation-transmission controlled |
| EGR-TCTVS
| Exhaust gas recirculation-torque converter thermal vacuum switch |
| EGR-TVV
| Exhaust gas recirculation/thermal vacuum valve |
| EGR-VS
| Exhaust gas recirculation/vacuum switch |
| EGR-VSDV
| Exhaust gas recirculation/vacuum switch dump valve |
| EGR-VSS
| Exhaust gas recirculation/vacuum switch solenoid |
| EGR-VVCS
| Exhaust gas recirculation/venturi vacuum control system |
| EGR/CLPS
| Exhaust gas recirculation-control lever position sensor |
| EGR/CM
| Exhaust gas recirculation-computer modulated |
| EGR/DT
| Exhaust gas recirculation/delay timer |
| EGR/EVAP-CSV
| Exhaust gas recirculation-early fuel evaporation-control solenoid valve |
| EGR/QVRV
| Exhaust gas recirculation/quick vacuum response valve |
| EGR/R
| Exhaust gas recirculation/regulator |
| EGR/S
| Exhaust gas recirculation/solenoid |
| EGR/SFVV
| Exhaust gas recirculation-solenoid fuel vacuum valve |
| EGR/SVV
| Exhaust gas recirculation/solenoid vacuum valve |
| EGR/TDS
| Exhaust gas recirculation/temperature diagnosis switch |
| EGR/TS
| Exhaust gas recirculation/thermal switch |
| EGR/TVS
| Exhaust gas recirculation/thermal vacuum switch |
| EGR/VCGV
| Exhaust gas recirculation/vacuum control gradient valve |
| EGR/VCV
| Exhaust gas recirculation/vacuum control valve |
| EGR/VCVF
| Exhaust gas recirculation/vacuum control valve filter |
| EGR/VSV
| Exhaust gas recirculation/vacuum switching valve |
| EGRC
| Exhaust gas recirculation control |
| EGRSR
| Exhaust gas recirculation/solenoid & regulator |
| EGRT
| Exhaust gas recirculation temperature |
| EGRV
| Exhaust gas recirculation vent |
| EHC
| Exhaust heat control |
| EHMI
| An acronym for the Environmental Hazards Management Institute. |
| EHS
| An acronym for extremely hazardous substance. |
| EI
| Electronic ignition |
| EIC
| Electronic instrument cluster |
| EIN
| An acronym for engine identification number. |
| EIS
| Electronic ignition system |
| EL
| An acronym for exposure limit. |
| elapsed time (ET)
| The time it takes a vehicle to cover a given distance, usually from a standing start, recorded to the thousandths of a second. |
| elastic limit
| The maximum stress a metal can withstand without exhibiting a permanent deformation on release of the stress. |
| elastomer
| 1. A synthetic polymer or copolymer that has elastic properties similar to those of rubber. 2. The rubber like compounds used in fuel lines, evaporative canister lines, etc. also used for other automotive applications such as brake lines and transmission lines. |
| ELB
| Electronic lean burn : This was the first electronic ingition system introduced by Chrysler Motors to fire an extremely lean air/fuel ratio and only controlled ignition timing |
| ELC
| An acronym for electronic level control. |
| eldo
| Slang for Cadillac Eldorado. |
| elec
| An acronym for electric. |
| electric assist choke
| A choke containing a small electric heating element to warm the choke spring. |
| electric automatic transmission
| An automatic transmission with computer controlled pressure regulation that gives precise control of shift scheduling and rapid response to changing conditions. |
| electric brakes
| A brake system having an electro-magnet and armature at each wheel to provide the braking action. |
| electric car
| A vehicle having an electric motor as the power source. |
| electric current
| The movement of electrons through a conductor. |
| electric defrosting
| Use of electric-resistance heating coils to melt ice and frost off 1. Evaporators. 2. Rear windows. |
| electric engine-cooling fan
| A 12-volt, motor-driven fan that is electrically controlled by either, or both, of two methods: An engine-coolant temperature switch (thermostat) and/or the air-conditioner select switch. |
| electric fuel pump
| A device having either a reciprocating diaphragm or a revolving impeller operated by electricity to draw fuel from the tank to the fuel delivery system. |
| electric system
| Any of the systems and sub systems that make up the automobile wiring harnesses, such as the lighting system or starting and charging system. |
| electric vehicle
| A vehicle having electric motors like a power source driven by on-board rechargeable batteries. |
| electric welding
| A term often used for arc welding. |
| electric-drive cooling fan
| 1. An engine-cooling fan driven by an electric motor. 2. An electrically controlled fan that cycles ON and OFF with the air conditioner control, if predetermined system and/or ambient temperatures are exceeded. |
| electricity
| Electricity is the movement of free electrons from one atom to another through a conductor. |
| Electrochemical
| The chemical action of two dissimilar materials in the presents of a carossive acid |
| electrochromic mirror
| A mirror that automatically adjusts the amount of reflectance based on the intensity of glare. |
| electrocution
| Death caused by electrical current through the heart, usually in excess of 50 ma. |
| electrode
| 1. A component of the electrical circuit that terminates at a gap across which current must arc. 2. The contacts of a semiconductor material that emits, collects or controls the movement of electrons or holes. 3 A rod used in welding. |
| electrohydraulic pressure actuator
| A valve that will provide a continuous adjustment of fuel pressure in certain fuel-injection systems. |
| electrohydraulic unit
| The microprocessor and hydraulic units are combined in one unit. |
| electroluminescence
| Exciting a phosphor and causing it to glow by using electricity. |
| electrolysis
| 1. Charging a material's chemical composition by applying an electromotive force and having an electrical current flow through it. 2. The process where an electric current is passed through an electrolytic solution, causing a chemical reaction. |
| electrolyte
| 1. A substance in which the condition of electricity is accompanied by chemical action.2. Any substance which, in solution, is separated into ions and is made capable of conducting electric current. 3. The sulfuric acid solution of a lead-acid battery. 4. A chemical compound that conducts ions from one electrode the the other inside a fuel cell. |
| electrolytic cell
| A simple battery consisting of the mainarea, two electrodes, and the electrolyte. |
| electromagnet
| A device consisting of a ferrous-metal core and a coil that produces appreciable magnetic effects when an electric current exists in the coil. |
| Electromagnetic
| Refers to a device which incorporates bouth electronic and mechanical principles togather in its operation |
| electromagnetic clutch
| an electrically controlled device used to start and stop the compressor action. |
| electromagnetic gauges
| A type of dash instrument gauge that uses a small electromagnetic coil for gauge needle movement. |
| electromagnetic induction
| 1. The induction of a voltage into a conductor by passing the conductor through a magnetic field or passing the magnetic field across the conductor. 2. Discovered by Michael Faraday in 1831 Faraday's first rule of electromagnetic induction states that whenever a conductor passes through a magnetic field a voltage is induced into that conductor that is directly proportional to the strength of the magnetic field and the speed of it's movement. |
| electromagnetism
| 1. A magnetic field created by passing a current through a conductor. 2. Faraday's second rule of electromagnetic induction states that whenever a current passes through a conductor a magnetic field is built up around that conductor that is directly proportional to the number of electrons (the amount of amperage) flowing in the conductor. |
| electromotive force (emf)
| The force created by an area of negative electrical potential acting on an area of positive electrical potential measured in units of voltage. |
| electron
| 1.An element of matter that surrounds the nucleus and helps determine the chemical and or electrical properties of an atom. 2. A negatively charged practical 1/1800 the mass of a proton orbiting around the nucleus in orbital paths called shells. |
| electron optics
| Electronics that apply the behavior of moving electrons under the influence of electrostatic or electromagnetic forces to devices or equipment. |
| electron theory
| The theory that electrons flows from an area of negative potential to an area of positive potential through a conductor. |
| Electronic
| Pertaining to the control of systems of devices by the use of small electrical signals and various semiconductors, devices and circuits |
| electronic air suspension (EAS)
| A suspension system having provisions to adjust to road and/or load conditions to ensure a comfortable ride. May also include automatic level control. |
| electronic brake control module (EBCM)
| A system having a monitor at each wheel to sense conditions and feed an electrical impulse into an onboard computer to reduce sideways skidding during rapid braking action. |
| electronic climate control (ECC)
| A system used to regulate the temperature and humidity of a vehicle's cabin. |
| electronic computer control system (ECCS)
| A term used for electronic control assembly (ECA). |
| electronic control assembly (ECA)
| A device that receives signals, processes them, makes decisions, and gives commands. More commonly referred to as a computer. |
| electronic control module (ECM)
| An electronic device used to control some engine functions. |
| electronic control system (ECS)
| An electronic device used to control certain electrical and engine operations. |
| electronic control unit (ECU)
| A digital computer that controls engine and transmission functions based on data that it receives from sensors, relative to engine rpm and temperature, air temperature, intake-manifold vacuum, and throttle position. |
| electronic controlled ignition (ECI)
| A term that often apples to an electronic ignition (EI) system. |
| electronic controlled transmission (ECT)
| A transmission that has electronic sensors to monitor throttle position, engine speed, torque converter turbine speed, and other drive-train operations that effect shifting, leading to fuel economy. |
| electronic cycling-clutch switch
| An electronic switch that prevents the evaporator from freezing by signaling various electronic control devices when the evaporator reaches a predetermined low temperature. |
| electronic distributorless ignition system (EDIS)
| An obsolete term for an ignition system that relies on a computer to time and route the electrical spark to the proper spark plug at the proper interval. Now known as electronic ignition (EI) system. |
| electronic engine control (EEC)
| A system that regulates an engine's electrical functions. |
| electronic feedback carburetor (EFC)
| A carburetor that controls the air/fuel mixture according to commands from the engine control computer. |
| electronic fuel control (EFC)
| A fuel system that used electronic devices to monitor engine functions to ensure that the proper air/fuel ratio reaches the combustion chamber for optimum engine performance under any operating condition. |
| electronic fuel-injection system
| A fuel-injection system that injects gasoline into a spark-ignition engine that includes an electronic control to time and meter the fuel flow. |
| electronic ignition (EI)
| An ignition system where a solid state device has replaced mechanical breaker points. |
| Electronic Ignition System
| [1] An ignition system that is controlled electronically rather than by mechanical methods. [2] An ignition system controlled by the use of small electrical components and or signals[3] The OBD-II j1930 acronym list indicates that all ignition systems that do not use a distributor are called electronic ignition systems wile thoes with distributers will be called distributer ignition systems wether they have electronic components or points. |
| electronic leak detector
| An electrically (AC or DC) powered leak detector that emits an audible and/or visual signal when its sensor is passed over a refrigerant leak. |
| electronic level control (ELC)
| A device that automatically regulates the ride height of a vehicle under various load conditions. |
| electronic mail (e-mail)
| The process of sending, receiving, storing, and forwarding messages in digital form over telecommunication facilities. |
| electronic spark control (ESC)
| A system that controls and governs the vacuum signal to the distributor to assure proper distributor retard-advance under various engine-load conditions. |
| electronic spark timing (EST)
| An electronic system that, based on input signals, provides the correct spark timing for a given engine condition. |
| electronically controlled transmission (ECT)
| A transmission that is electronically linked to the vehicle's electronic control system. |
| electroplating
| A process for depositing metal on a conductive surface that is made by the cathode in an electrolytic bath containing dissolved salts of the metal being deposited. |
| electrostatic
| A kind of electricity where the charges are not moving. |
| electrostatic field
| The electrical field of force surrounding an object that has an electrical charge. |
| electrostatic shield
| A shield that protects a device or circuit from electrostatic energy, but not necessarily from electromagnetic energy. |
| element
| A substance that cannot be further divided; the smallest partials of pure matter. |
| Elenco
| An electronics test equipment company |
| elephant foot
| A valve-adjusting screw having a ball that swivels when it contacts the valve stem. |
| elephant motor
| The Chrysler Hemi 425 cid engine. |
| eliminations
| A series of matches between two cars at a time, the winner advancing to the net race. |
| eliminator
| The fastest drag car in its class. |
| Elky
| The Chevrolet El Camino. |
| Elliot axle
| A solid-bar front axle on which the ends span the steering knuckle. |
| elliptical spring
| A term used for leaf spring. |
| elongation
| The stretching of a material. |
| embedability
| The ability of a bearing to permit small dirt particles to sink into the bearing surface, thereby avoiding certain crankshaft scratches. |
| embossed gasket
| A shim-type head gasket having a raised surface. |
| embrittlement
| A condition whereby a part becomes hard and brittle due to excessive flexing. |
| EMC
| Electro-magnetic compatibility |
| EMCC
| Electronically Modulated Converter Clutch (Chrysler ) |
| emergency brake system
| A brake system used for stopping a vehicle in the event of a malfunction in the means of operation and control of the service brake system. |
| emery paper
| An abrasive-coated paper used for fine finishing. Also called emery cloth |
| EMF
| Electro-motive force |
| EMI
| Electro-magnetic interference "NOISE" |
| emission
| (electrical) The release of free electrons from the surface or a material. |
| emission standards
| The federal-government-established emission and pollutant standards for all motor vehicles because of environmental damage in the part. |
| emissions
| Unwanted, harmful chemicals and chemical compounds that are released into the atmosphere from a vehicle, especially from the tailpipe, crankcase, and fuel tank including unburned hydrocarbons, carbon monoxides of nitrogen, particulates, and sulfur. |
| emissions control
| A term used for emission controls. |
| emissions warranty
| A federally mandated 5-year/50,000 mile performance and defect warranty that covers all emissions-related components on all new vehicles built since 1982. In 1995 the emissions warranty was reduced to 2 years/24,000 miles on all emissions-related components except the computer and catalytic converter, which are extended to 8 years/80,000 miles. |
| emitter
| The semiconductor material in a transistor that emits carriers into the base region when the emitter base junction is forward biased. |
| EMR
| Emission maintenance reminder or electronic module retard |
| emulsifiable chemical
| Any chemical that will mix with water. |
| emulsion
| A fluid substance containing one liquid disbursed and suspended in another, rather than dissolved. |
| emulsion tube
| A passage in a carburetor where air is mixed with fuel. |
| EMW
| Emission maintenance warning |
| enable
| To switch a computer device or facility so it can operate. |
| enable criteria
| The exact conditions necessary for a diagnostic test or OBD-II monitor to run. |
| enamel
| A free-flowing clear or pigmented varnish, treated oil, or other form of organic coating that usually dries to a hard, glossy, or semigloss finish. |
| enameled wire
| Wire insulated with a thin, baked-on varnish enamel, used in coils to allow the maximum number of turns in a given space. |
| encoder
| An electromagnetic transducer used to produce digital data (code) indicating angular or linear position. |
| end clearance
| The distance a shaft moves longitudinally as the crankshaft in an engine, Also known as end play. |
| end gap
| The distance between the ends of a piston ring. |
| end gas
| The last part of an air/fuel mixture to furn during combustion. |
| end play
| 1. The total amount of axial play in an automatic transmission. Endplay is typically measured at the input shaft. 2.A term used for end clearance. |
| endo
| To flip a vehicle end over end. |
| Endplay
| The measured amount of axial movement in a shaft |
| endurance limit
| The maximum stress that a metal can withstand without failure, after a specified number of cycles of stress. |
| enduro
| A race of 6 to 24 hours with emphasis on endurance and reliability rather than speed. |
| Energized
| Having the electric current or source turned on |
| energy
| The capacity for performing work. |
| eng
| An acronym for engine. |
| engage
| The mechanical or automatic coupling of two members, like the driving flywheel and pressure plate, to rotate and drive the driven disc of a clutch. |
| engagement chatter
| A shaking, shuddering action that takes place as the driven disc makes contact with the deriving members caused by a rapid grip and slip action. |
| engine
| A device that burns fuel to produce mechanical power; to convert heat energy into mechanical energy. |
| engine bay
| The area in a vehicle occupied by the engine. |
| engine block
| A term used for cylinder block. |
| engine configuration
| Relating to the style and type of engine, such as V-8, pancake, and so on. |
| engine cooling fan
| A term used for cooling fan. |
| engine cooling system
| A term used for cooling system. |
| engine displacement
| The volume swept within an engine as its cylinders make one stroke, generally expressed in cubic inches, cubic centimeters, or liters. |
| engine dynamometer
| Device to measure engine horsepower at the flywheel. |
| engine dyno
| A term used for engine dynamometer. |
| engine fan
| A bladed device found at the front of the engine used to draw air through the radiator and across the engine. |
| engine identification number (EIN)
| A code to identify the type of engine found stamped on the cylinder block. |
| engine idle compensator
| A thermostatically controlled device on the carburetor that prevents stalling during prolonged hot weather periods, while the air conditioner is operated. |
| engine overhaul
| To perform more than minor repairs on a powerplant, though not as extensive as an engine rebuild. |
| engine paint
| A paint specially formulated to withstand engine heat. |
| engine rebuild
| To perform an extensive engine repair including machining, re-boring, and honing to factory-stock specifications. |
| Engine running test
| A Ford diagnostic term for a section of the EEC-IV self-test that tests the input and control functions under actual operating conditions |
| engine thermal switch
| An electrical switch designed to delay the operation of a system in cool weather to allow time for the engine coolant to warm up. |
| engine thermostat
| A temperature-sensitive mechanical device found at the coolant outlet of an engine that expands (opens) or contracts (closes) to control the amount of coolant allowed to leave the engine, based on its temperature. |
| engine torque
| A rotating, twisting action developed by the engine that is measured in pounds, feet, or kilowatt hours. |
| engine tuneup
| The inspection, testing, and adjusting of an engine; the replacement of any parts required to ensure maximum performance. |
| engine-coolant temperature (ECT)
| The temperature of the coolant in an engine. |
| engine-coolant temperature sensor (ECTS)
| An electronic or electro-mechanical unit for sensing engine-coolant temperature. |
| engine-management system
| An electronic device that monitors, adjusts, and regulates the ignition and fuel-injection systems to maintain engine control under varying operating conditions. |
| engineering plastics
| Thermoset and thermoplastic materials, such as polycarbonate, ABS, and nylon. Their characteristics and properties enable them to withstand mechanical loads, such as tension, impact, flexing, vibration, and friction, combined with temperature changes, making them suitable for application in structural and load-bearing product design elements. |
| English town (E-town)
| A town in New Jersey; the site of the annual NHRA Summer nationals. |
| enleanment
| The act of reducing fuel delivery to the air-fuel mixture to create a leaner mixture. |
| enrichment
| The act of adding fuel delivery to the air-fuel mixture to create a richer mixture |
| Envelope
| The outline of a signal's highest and lowest points acquired over many displayed waveform repetitions |
| Environmental Hazards Management Institute (EHMI)
| An educational organization that provides materials to teenagers and adults relative to responsible management and recycling of hazardous waste materials. |
| Environmental Protections Agency (EPA)
| An agency of the United States government charged with the responsibility of protecting the environment and enforcing the Clean Air Act of 1990. See EPA |
| EP
| An acronym for extreme pressure. |
| EP lube
| A term used for extreme-pressure lubricant. |
| EPA
| An acronym for Environmental Protection Agency. The U.S. government executive department that establishes and enforces regulations to protect and preserve the physical environment, best known for regulations related to air, water and land quality. |
| EPC
| Electronic pressure control |
| EPIC
| Electronic programmable injection control |
| epoxy
| A plastic compound that is often used to repair cracks and small holes in metal. |
| epoxy cement
| A durable thermosetting adhesive. |
| EPR
| An acronym for evaporator pressure regulator. |
| EPRS
| Exhaust pressure regulator solenoid |
| EPRV
| Exhaust pressure regulator valve |
| EPT
| Exhaust gas recirculation pressure transducer or exhaust pressure transducer |
| EPV
| Exhaust gas recirculation position valve or external pressure valve |
| equal length headers
| An exhaust system having equal length tubes from each cylinder to the collector. |
| equalizer
| 1. A device in the brake-cable system that prevents one side from being applied before the other. 2. The tube that balances pressure between two exhaust pipes. |
| equalizer line
| A small-bore line used to provide a balance of pressure from one point to another, as in a thermostatic expansion valve. |
| Equipment and Tools Institute (ETI)
| An organization of equipment and tool manufacturers, jobbers, and wholesalers. |
| Equivalent-time sampling
| A sampling mode in which the oscilloscope constructs a pitcure of a repetitive signal by capturing a little bit of information from each repetion. |
| ER
| Engine running; Also Er, Erbium An element with the atomic number of 68 |
| erasable programmable read-only memory (E-PROM)
| A special PROM that can be erased under high-intensity ultraviolet light, ten reprogrammed. |
| ergonomic hazards
| Conditions that relate to one's physical body or to motion. |
| ergonomics
| The science of adapting the workplace to the worker, as in the cockpit of a race car to the driver. |
| ERS
| Engine rpm sensor |
| Es
| Einsteinium An element with the atomic number of 99 |
| ESA
| Electronic spark advance |
| ESC
| 1.An acronym for electronic spark control. 2. The computer system that is equipped with a knock sensor that can retard spark advance if necessary to eliminate spark knock |
| ESCM
| Electronic spark control module |
| ESD
| Electro-static discharge |
| ESS
| Electronic spark selection or engine speed sensor |
| esses
| A series of s-shaped bends in a race course. |
| EST
| An acronym for electronic spark timing. A computer controlled spark advance system |
| Estate car
| English term for Station Wagon |
| estimator
| The person who determines the cost value of the damage, plus the price required to repair he damaged vehicle, working with insurance adjusters or appraisers. |
| ESV
| An acronym for experimental safety vehicle. |
| ET
| An acronym for elapsed time. |
| ETA
| Estimated time of arrival |
| ETBE
| An acronym for ethyl tertiary butyl ether. This fuel Oxygenate is manufactured by reacting isobutylene with ethanol, the resulting ether is high in octane and low in volatility and can be added to gasoline up to a level of 17% by volume |
| etching
| The localized attack of metal surfaces causing pitting and/or deterioration. |
| ethane
| C2H6, a minor component of natural gas used as a fuel. |
| ethanol
| A form of alcohol, C2H5OH, found in alcoholic beverages and also used as an additive in gasoline to produce gasohol and is used as a Oxygenate in reformulated gasoline. Also used as an octane enhancer 10 % added to gasoline will increase octane 2.5 to3.0 numbers. |
| Ethyl
| The trade name for tetraethyl lead, a fuel additive no longer permitted due to environmental hazards. |
| ethyl alcohol
| A term often used for ethanol. |
| ethylene glycol
| The basic chemical used in automotive antifreeze; mixed with water for cooling-system protection and to increase the boiling point of the coolant. |
| Ethylene Glycol Antifreeze
| Normilly (Green) Ethylene Glycol has been the standard antifreeze for automobiles sence the 1940's |
| ETI
| An acronym for Equipment and Tools Institute. |
| ETR
| Electronically tuned receiver or emergency tensioning retractor |
| ETS
| Engine temperature sensor |
| ETSA
| Engine timing sensor assembly |
| ETV
| Electronic throttle valve |
| Eu
| Europium An element with the atomic number of 63 |
| Eurostyle
| A custom styling treatment to provide a European flair. |
| EV
| Electric vehicle |
| evacuate
| 1. To create a vacuum within a system to remove all traces of air and moisture. 2. A service procedure using a vacuum pump to remove all atmospheric air and moisture from inside an air-condition system. |
| EVAP
| 1. An acronym for evaporator. 2. An acronym for evaporative emission control system. This system is used to collect fuel vapor from the fuel tank and deliver them to the intake manifold at the propre time. |
| EVAP-AAC
| Fuel evaporative system-auxiliary air control |
| EVAP-BVSV
| Fuel evaporative system-bimetal vacuum switching valve |
| EVAP-CPCS
| Fuel evaporative system-canister purge control solenoid |
| EVAP-CPT
| Fuel evaporative system-canister purge timer |
| EVAP-CPTVS
| Fuel evaporative system-canister purge thermal valve switch |
| EVAP-CPVDV
| Fuel evaporative system-canister purge vacuum delay valve |
| EVAP-CS
| Fuel evaporative system-control solenoid |
| EVAP-CVSV
| Fuel evaporative system-carburetor vent switching valve |
| EVAP-DCTO
| Fuel evaporative system-dual coolant temperature override |
| EVAP-FBVS
| Fuel evaporative system-fuel bowl vent valve |
| EVAP-FBVV
| Fuel evaporative system-fuel bowl vent solenoid |
| EVAP-FVS
| Fuel evaporative system-fuel vapor separator |
| EVAP-IVS
| Fuel evaporative system-inner vent solenoid |
| EVAP-OVCV
| Fuel evaporative system-outer vent control valve |
| EVAP-PCSV
| Fuel evaporative system-purge cut-off solenoid valve |
| EVAP-PRRV
| Fuel evaporative system-pressure release rollover valve |
| EVAP-PVS
| Fuel evaporative system-ported vacuum switch |
| EVAP-RVSV
| Fuel evaporative system-rollover vapor separator valve |
| EVAP-SV
| Fuel evaporative system-solenoid valve |
| EVAP-TPBPV
| Fuel evaporative system-tank pressure by pass valve |
| EVAP-TPCV
| Fuel evaporative system-tank pressure control valve |
| EVAP-TS
| Fuel evaporative system-temperature switch |
| EVAP-TV
| Fuel evaporative system-thermal valve |
| EVAP-TVS
| Fuel evaporative system-thermal vacuum switch |
| EVAP-TWV
| Fuel evaporative system-two way valve |
| EVAP-VC
| Fuel evaporative system-vapor canister |
| EVAP-VCV
| Fuel evaporative system-vapor canister valve |
| EVAP-VM
| Fuel evaporative system-vacuum motor |
| EVAP-VS
| Fuel evaporative system-vacuum sensor |
| EVAP-VSV
| Fuel evaporative system-vacuum switching valve |
| EVAP-VV
| Fuel evaporative system-ventilation valve |
| evaporation
| The transformation of a liquid to the vapor state. |
| evaporation control system (ECS)
| A system that prevents fuel vapors from escaping to the atmosphere while the engine is off. |
| evaporative emissions
| Hydrocarbons from fuel that evaporate from a vehicle's fuel tank and carburetor; eliminated by sealing the fuel system and using a charcoal canister to trap vapors from the fuel tank and carburetor. |
| evaporative-emissions control (EEC)
| A canister filled with activated charcoal to reduce raw fuel emissions. |
| evaporative-emissions control system (EECS)
| A system to reduce the amount of raw fuel vapors that are emitted into the ambient air from the fuel tank and carburetor. |
| evaporator
| The heat exchanger of an air-conditioning system that removes heat from the air passing through it. |
| evaporator control valve
| Any of the several types of suction pressure-control valves or devices used to regulate the evaporator temperature by controlling its pressure. |
| evaporator core
| The tube and fin assembly located inside the evaporator housing, where refrigerant fluid picks up heat when it changes into a vapor. |
| evaporator equalizer valves-in-receiver
| A term used for valves-in-receiver. |
| evaporator fan
| A fan used to move air across the evaporator and heater core. |
| evaporator housing
| The case that contains the evaporator core, diverter doors, duct outlets, and blower mounting arrangement. |
| evaporator pressure-control valve
| A term used for evaporator control valve. |
| evaporator temperature regulator
| A temperature-regulated device used by early Chrysler Air-Temp systems to control the evaporator pressure. |
| even fire
| A V-6 engine with a 60- or 90-degree block having individual journals on each crankshaft throw staggered in relation to each other to provide even firing. |
| EVIC
| Electronic Vehicle Information Center |
| EVO
| Electronic variable orifice |
| EVP
| Exhaust gas recirculation valve position |
| EVR
| [1] Exhaust gas recirculation vacuum regulator [2] Electronic Voltage Regulator |
| EVRV
| Electronic vacuum regulator valve or exhaust gas recirculation vacuum regulator valve |
| exa
| The prefix representing the number 1,000,000,000,000,000,000 |
| exc
| An acronym for except. |
| except
| A word referring to an omitted category or item. |
| excess flash
| A term used for flash. |
| excessive crush
| A condition that exists when a pair of bearings are installed in a bore that is to small, causing them to deform and leading to early failure. |
| exhaust analyzer
| An automotive test and service device that uses a process involving infrared energy to determine and display the composition of an engine's exhaust gases such as the two-gas type to measure hydrocarbons and carbon monoxide or thee four-gas type, which also measures oxygen and carbon dioxide. |
| exhaust back pressure
| The resistance of the free flow of gas in the exhaust system. |
| Exhaust Back Pressure Testing
| A test on the exhaust manifold or head pipe to determine the amount of eexhaust restriction |
| exhaust emissions
| Pollutants identified by clean-air legislation as being harmful or undesirable, including lead, unburned hydrocarbons, carbon monoxide, and oxides of nitrogen. |
| exhaust gas
| The burned and unburned gases that remain after combustion. |
| Exhaust Gas Analyzer
| An instrument for determining the amount of HC , CO, CO2, O2, and NOx emitted into the atmosphere. |
| exhaust headers
| 1. A term used for exhaust manifold. 2. A special exhaust manifold with tubes of equal length from the exhaust ports to the header of the exhaust system. |
| Exhaust Heat Control Valve
| A valve which routes hot exhaust gases to the intake manifold heat riser during cold engine operation. |
| exhaust manifold
| A component, generally of cast iron, with passages of unequal lengths that carry the exhaust gases from the exhaust ports tot the header of the exhaust system. |
| exhaust pipe
| A pipe that connects the exhaust manifold, the muffler, or catalytic converter. |
| exhaust port
| In a rotary combustion engine, peripheral opening in the rotor housing that allows the burned gases to leave the engine. |
| exhaust stroke
| The upward motion of the piston forcing burned gases out the open exhaust valve. |
| exhaust system
| The tubing, mufflers, and catalytic converters that direct exhaust gases from the engine to the atmosphere. |
| exhaust valve
| Valve that, upon opening, allows the burned gases to leave the combustion chamber during the exhaust stroke. |
| exhaust-gas oxygen
| The amount of oxygen present in the exhaust stream, as measured by an oxygen sensor and reported to the computer in closed-loop, feedback systems to aid in the control of the air/fuel mixture. |
| exhaust-gas recirculation (EGR)
| An emissions-control system that reduces an engine's production of oxides of nitrogen by diluting the air/fuel mixture with exhaust gas so that peak combustion temperatures in the cylinders are lowered. |
| exhaust-gas recirculation valve (EGR valve)
| A valve, generally vacuum operated, to regulate the exhaust gas flow into the intake manifold. |
| exhaust-gas speed
| The speed at which exhaust gases pass through the header pipes, usually at about 200-300 feet (61-91 meters) per second. |
| exothermic
| A chemical reaction, such as combustion, that gives off heat. |
| expansion control
| The grinding of a piston in a slightly oval shape so that it becomes round when it expands with heat. |
| expansion plug
| A term used for core plug. |
| expansion tank
| 1. A coolant-recovery tank. 2. An auxiliary tank, usually connected to the inlet tank or a radiator, that provides additional storage space for heated coolant. |
| expansion tube
| A metering device used at the inlet of some evaporators to control the flow of liquid refrigerant into the evaporator core. |
| expansion valve
| A term used for thermostatic expansion valve. |
| experimental safety vehicle (ESV)
| A prototype vehicle used to test and evaluate specific safety features. |
| explosion-proof cabinet
| Cabinet used in the automotive shop to store gasoline and other flammable liquids. |
| exposure limit (EL)
| A term often used for permissible exposure limit (PEL). |
| extension housing
| An aluminum or iron casting that encloses the transmission output shaft and supporting bearings. |
| external combustion engine
| An engine that burns the air-fuel mixture in a chamber outside the engine cylinder, such as a steam engine or a Stirling engine. |
| external equalizer
| A term used for equalizer line. |
| external gear
| A gear with teeth on its outside surface. |
| external in-line filter
| 1. Filter placed in the transmission-cooler return line outside the transmission housing. 2. A supplemental filter placed in the air-conditioning system to prevent system damage after repairs. |
| externally-tabbed clutch plate
| Clutch plates having tabs around the outside periphery to fit into grooves in a housing or drum. |
| extra capacity
| 1. A coupling device that has strength capability greater than standard. 2. A fluid reserve system. |
| extreme pressure (EP)
| A much higher-than-average pressure condition. |
| extreme pressure lubricant
| An API-rated lubricant for heavy loads. |
| extremely hazardous substance (EHS)
| Any substance or the by-product of any substance that is poisonous or contains carcinogens considered unsafe, in any concentration, for humans, animals, or plant life. |
| eyeball
| 1. To make a visual estimation or determination. 2. A voltage monitoring circuit |
| eyes
| the light beam that operates an electronic, race-timing system. |
| eyewash fountain
| An emergency water fountain that directs water to the eyes for flushing and cleaning. |
| EZK
| (Porsche) Ignition System Type |
Auto & Car Glossary
