Glossary “cranking vacuum test” Definition:
Test used to determine how much vacuum an engine can produce when cranking.
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crankshaft
Glossary “crankshaft” Definition:
1). Revolving part mounted in the lower portion of the engine block, supported by main bearings and provide attachment point for the connecting rods. 2). That part of a reciprocating compressor on which the wobble plate or connecting rods are attached.
crankshaft arm
Glossary “crankshaft arm” Definition:
Connector between the two rod journals and the main bearing on the crankshaft.
crankshaft counterbalance
Glossary “crankshaft counterbalance” Definition:
Term used for crankcase counterweight.
cranking circuit
Glossary “cranking circuit” Definition:
The starting motor and its associated circuit, including battery, relay (solenoid), ignition switch, neutral safety switch, cables, and wires.
cranking motor
Glossary “cranking motor” Definition:
A special high-torque electric motor designed for the purpose of cranking the engine for starting.
cranking
Glossary “cranking” Definition:
Turning the crankshaft with an electric starter motor. Also see starting.
crankcase fumes
Glossary “crankcase fumes” Definition:
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
Glossary “crankcase pressure” Definition:
The pressure produced in the crankcase from blow-by gases.
crankcase scavenging
Glossary “crankcase scavenging” Definition:
The process by where fresh air is mixed with blow-by gases in the crankcase so that the bow-by can be efficiently removed through the PCV system. This is important because blow-by gases can dilute the oil if not removed.
crankcase vapors
Glossary “crankcase vapors” Definition:
Vapors 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.
crankcase ventilation
Glossary “crankcase ventilation” Definition:
A tube or vent that allows excessive crankcase pressure to escape.
crankcase
Glossary “crankcase” Definition:
Lower section of the engine that supports the crankshaft, confined by the lower block casting and the oil pan.
crankcase breather
Glossary “crankcase breather” Definition:
A tube or vent that allows excessive crankcase pressure to escape.
crankcase dilution
Glossary “crankcase dilution” Definition:
Thinning of oil in the crankcase, caused by the condensation of fuel, due to blow-by, and by seepage past the piston rings.
crankcase emissions
Glossary “crankcase emissions” Definition:
Vapors that leave the crankcase by way of an open or closed ventilation system.
crank rpm
Glossary “crank rpm” Definition:
Measurement that is required for an electronic engine-control system to determine when ignition should occur.
crank signal
Glossary “crank signal” Definition:
Electrical signal sent to the computer, to tell it that the engine is cranking and to enrich the air/fuel ratio for easier starting. Also used to determine RPM.
crank start
Glossary “crank start” Definition:
To start an internal-combustion engine by hand cranking.
crank web
Glossary “crank web” Definition:
Part of a crankshaft that is between a crankpin and a main bearing.