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CPVDV

Canister purge vacuum delay valve

Cr

[1] Chromium An element with the atomic number of 24 [2] acronym for compression ratio

Cracked

1. Broken. 2. A term often used for the mid-position of a two-way valve.

Crank

1. A crankshaft. 2 To start an engine. 3. To go fast.

Crank Kit

A reconditioned crankshaft with the appropriate rod and main bearings.

Crank Pin

The rod journal of a crankshaft.

Crank Rpm

A measurement that is required for an electronic engine-control system to determine when ignition should occur.

Crank Scraper

An oil control product that acts like a windshield wiper that removes excess oil from the crankshaft and directs it back down into the oil pan. (Note

Crank Signal

An electrical signal sent to the computer, to tell it that the engine is cranking and to enrich the air/fuel ratio for easier starting.

Crank Start

To start an internal-combustion engine by hand cranking.

Crank Trigger

An ignition system component that can be added to race and high-performance street vehicles. The crank trigger literally triggers the ignition system according to the position of the crankshaft. This removes the responsibility for triggering the ignition from the distributor, which is driven by a gear on the camshaft. However, a distributor still is necessary with a crank trigger ignition system, because it must distribute the spark from the coil to the appropriate spark plug wire, according to the engine's firing order.

Crank Web

That part of a crankshaft that is between a crankpin and a main bearing.

Crankcase

The lower section of the engine that supports the crankshaft, confined by the lower block casting and the oil pan.

Crankcase

The part of an engine that houses the crankshaft. In most cases, this includes the oil pan and the lower part of the engine block.

Crankcase Breather

A tube or vent that allows excessive crankcase pressure to escape.

Crankcase Dilution

The thinning of oil in the crankcase, caused by the condensation of gasoline due to blow-by, and by seepage past the piston rings.

Crankcase Emissions

Fumes that leave the crankcase by way of an open or closed ventilation system.

Crankcase Fumes

Vapors inside the crankcase that could contaminate the air, including unburned fuel vapors, water vapor, or blow-by gases. Also known as crankcase vapors.

Crankcase Pressure

The pressure produced in the crankcase from blow-by gases.

Crankcase Vapors

Fumes inside the crankcase, caused by blow-by, that could contaminate the air, including unburned fuel vapors, water vapor, or blow-by gases. Also known as crankcase fumes.