Glossary “CRI” Definition:
Color Rendering Index: it is the index for measuring how close a lamp in indoor lighting is to actual daylight.
c
critical pressure
Glossary “critical pressure” Definition:
Pressure at which a gas becomes unstable.
critical temperature
Glossary “critical temperature” Definition:
Temperature at which a flammable gas will ignite. Maximum temperature allowed by a vehicle maker to prevent loss of strength in metal, when heated to relieve stress.
crocking
Glossary “crocking” Definition:
The rubbing off or transfer of color from a painted object onto a person’s clothing.
crocus cloth
Glossary “crocus cloth” Definition:
A very fine-grit sandpaper that is used to clean or polish parts.
crescent wrench
Glossary “crescent wrench” Definition:
Also referred to as an adjustable wrench, it has movable jaws to fit different head sizes.
crankshaft thrust collar
Glossary “crankshaft thrust collar” Definition:
Machined surface between the main bearing and the two rod journals on the crankshaft, upon which the thrust bearing runs, to provide the proper end-play.
crash sensor
Glossary “crash sensor” Definition:
Normally open, gold-plated, electrical switches that are designed to closes when subjected to a predetermined rate of deceleration that occurs during a crash.
cream hardener
Glossary “cream hardener” Definition:
An activating ingredient for a plastic-filler material, such Bondo.
crescent
Glossary “crescent” Definition:
A concave and convex shape.
crankshaft seal
Glossary “crankshaft seal” Definition:
1). A rubber-like seal around an engine crankshaft to prevent the leakage of oil. 2). A rubber-like and/or ceramic seal surrounding the compressor crankshaft to prevent the leakage of oil and/or refrigerant.
crankshaft throw
Glossary “crankshaft throw” Definition:
One crankpin with two webs.
crankshaft main journal
Glossary “crankshaft main journal” Definition:
That part of the crankshaft, ground round and polished smooth, around which the closely fitted main bearings surround the journals and support the crankshaft.
crankshaft oil passage
Glossary “crankshaft oil passage” Definition:
Holes drilled through the crankshaft to permit oil to flow from the main bearings to the connecting-rod bearings.
Crankshaft Position Sensor
Glossary “Crankshaft Position Sensor” Definition:
Mounted immediately in front of the cylinder block and aligned with the crankshaft pulse ring: relays the actual position of the crankshaft to the PCM. May also be found at the rear of the crankshaft, using special slotted vane disk that is mounted to the flex plate. Some use a special flywheel that provides the signals to the sensor.
crankshaft pulley
Glossary “crankshaft pulley” Definition:
A pulley fitting on the front of the crankshaft.
crankshaft counterweight
Glossary “crankshaft counterweight” Definition:
Weight that is cast opposite each offset connecting-rod journal, to provide the necessary balance.
crankshaft end-play
Glossary “crankshaft end-play” Definition:
Specified crankshaft endwise motion controlled by side flanges on one of the main bearings.
crankshaft gear
Glossary “crankshaft gear” Definition:
Gear or sprocket found on the front end of the crankshaft that is used, directly or indirectly, to drive the camshaft.
Cranking Retard Module (CRM)
Glossary “Cranking Retard Module (CRM)” Definition:
Ignition module which features a circuit that retards the ignition timing up to 18 degrees during engine crank.