Glossary “diesel cycle” Definition:
An engine operating cycle where the air is compressed and the fuel is injected at the end of the compression stroke, causing ignition.
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diesel dynamic timing meter
Glossary “diesel dynamic timing meter” Definition:
To dynamically time a diesel engine, the fuel line pulse, crankshaft position and combustion time must be referenced at the same time. The fuel line pulse is monitored with a pressure transducer. Crankshaft position is monitored with a magnetic probe. Combustion is monitored by inserting a luminosity probe into a specific glow plug hole. The luminosity probe is then attached to a photocell which detects combustion.
diesel engine
Glossary “diesel engine” Definition:
A compression-ignition (CI) engine.
diesel fuel
Glossary “diesel fuel” Definition:
Fuel designed to be used in a CI engine. It is blended for different temperature ranges, such as summer or winter blends. It is rated by cetane which indicates the ease at which it ignites, the higher the cetane rating, the easier the fuel ignites.
diesel injection nozzle tester
Glossary “diesel injection nozzle tester” Definition:
Consists of a reservoir filled with special calibration fluid, high pressure pump, and the adapters neeeded to attach a pressurized line to a nozzle. Used to bench test injector nozzles.
dielectric grease
Glossary “dielectric grease” Definition:
Lithium or silicone based grease used to lubricate, protect from moisture, and dissipate heat while acting as a non-conductor; applications include light bulb sockets, spark plug boots, distributor caps and under ignition modules
die
Glossary “die” Definition:
Tool used for cutting threads on the outside of bolts or studs.
die out
Glossary “die out” Definition:
To stall or stop running.
dielectric
Glossary “dielectric” Definition:
1). An insulator. 2). A term referring to the insulation between the plates of a capacitor.
diaphragm spring clutch
Glossary “diaphragm spring clutch” Definition:
A clutch in which a diaphragm spring applies pressure against the friction disk.
DIC
Glossary “DIC” Definition:
Driver Information Center
DI CCD
Glossary “DI CCD” Definition:
Distributor Ignition – Computer Controlled Dwell
dice
Glossary “dice” Definition:
A tight contest between two cars on an oval track or road course generally battling for a specific position.
dichlorodifluoromethane
Glossary “dichlorodifluoromethane” Definition:
Chemical name for Refrigerant-12.
DID
Glossary “DID” Definition:
Direct Injection Diesel
diameter
Glossary “diameter” Definition:
The cross-section measurement of a round or circular object.
diaphragm
Glossary “diaphragm” Definition:
1). A flexible membrane in a speaker or microphone where electrical signals are converted to sound vibrations and vice versa. 2). The flexible membrane found in a temperature or pressure control device that seals in an inert fluid or gas from the atmosphere while allowing a mechanical movement due to changes in pressure or temperature.
diaphragm clutch
Glossary “diaphragm clutch” Definition:
A clutch having a shallow, cone-shaped spring disc to provide pressure to the disk plate.
diaphragm spring
Glossary “diaphragm spring” Definition:
1). A spring shaped like a disk with taped fingers pointed inward. 2). A spring shaped like a wavy disk.
dial caliper
Glossary “dial caliper” Definition:
Measuring instrument capable of taking inside, outside, depth and step measurements. It can measure these dimensions from 0 – 6 inches. Metric dial calipers typically measure from 0 – 150mm in increments of 0.02mm.