Glossary “retard sensor” Definition:
Term used for knock sensor.
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retarded timing
Glossary “retarded timing” Definition:
When the spark is late arriving to the combustion chamber and the flame front reaches the top of the pistion when the pistion is to far down in the cylinder to push the pistion with any great amount of force.
retaining ring
Glossary “retaining ring” Definition:
A removable fastener used as a shoulder to retain and position a round bearing in a hole.
retard
Glossary “retard” Definition:
To cause ignition spark to occur later in an engine’s cycle.
retainer
Glossary “retainer” Definition:
That sector or segment of a part, or that part which acts to keep another part or parts in position.
restrictor
Glossary “restrictor” Definition:
An insert fitting or device used to control the flow of air or fluid.
restrictor plate
Glossary “restrictor plate” Definition:
1). A plate with holes drilled in it to restrict the flow of air or liquid. 2). A plate with holes of a calibrated diameter that is placed between the carburetor and intake manifold of a stock car to restrict the air/fuel flow, thereby reducing engine speed and horsepower.
resultant force
Glossary “resultant force” Definition:
The combined force and oil flow direction produced by rotary and vortex flow in a fluid coupling or torque converter.
resume
Glossary “resume” Definition:
Operating mode of the speed control system which reactivates the system after it has been disabled (such as by stepping on the brake pedal) and returns it to the speed at which it was previously set. Shutting the vehicle off erases the resume memory.
rest pressure
Glossary “rest pressure” Definition:
Fuel pressure maintained within the system after the engine has been shut down.
restraint system
Glossary “restraint system” Definition:
Designed to help hold people in their seats and prevent them from being injuried during a collision using lap and shoulder belts.
restriction
Glossary “restriction” Definition:
A blockage in an air or fluid line caused by a pinched or crimped line, foreign matter, or moisture freeze-up.
resonate
Glossary “resonate” Definition:
Effect produced when the natural vibration frequency of a part is greatly amplified by reinforcing vibrations at the same or nearly the same frequency by another part.
resonator
Glossary “resonator” Definition:
Small auxiliary muffler, after the main muffler, used to help reduce engine noise without restricting the flow of exhaust gas.
Resource Conservation and Recovery Act (RCRA)
Glossary “Resource Conservation and Recovery Act (RCRA)” Definition:
Federal law that requires users of hazardous materials to store used materials in a manner consistent with established guidelines until they can be property disposed.
response time
Glossary “response time” Definition:
Time required for a computer to respond to a specific input command.
resistor
Glossary “resistor” Definition:
Electrical device used to reduce voltage.
resistor spark plug
Glossary “resistor spark plug” Definition:
Spark plug having a resistance of 5,000 to 10,000 ohms inside the upper part of the insulator, increasing the electrode life and suppressing radio interference.
reson
Glossary “reson” Definition:
Acronym form of Resonator.
resonance
Glossary “resonance” Definition:
The way air stops moving and bounces back when the intake valve closes.