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Single Leaf Spring

A spring having one leaf that may be tapered thinner and wider toward the ends, allowing a variable flexing rate.

Single Overhead Camshaft (SOHC)

An engine having one overhead camshaft.

Single Overhead Camshaft Engine

An engine having a single camshaft mounted over each cylinder head.

Single Pass

A term applicable to a refrigerant recovery unit that removes refrigerant from the air conditioner and passes it through only one time on its way to the recovery cylinder.

Single Rear Wheels (SRW)

Single wheels on either side of the drive axle of a rear-drive vehicle.

Single Reduction Axle

An axle assembly that has but one gear reduction through its differential carrier assembly.

Single Shot

A single measured by an oscilloscope that only occurs once.

Single Sweep

A trigger mode to display one triggered screen of a signal and then stop.

Single Wrap

A transmission brake with a circular steel strap that is lined internally with friction material.

Single-board Engine Controller (SBEC)

A single microprocessor used to control engine functions.

Single-pivot Control Arm

A term used for control arm.

Single-plane Crankshaft

A crankshaft having throws on the opposite side of the same plane, at 180 degrees.

Single-plane Manifold

An intake manifold having a single plenum between the carburetor and intake ports.

Single-wire Circuit

A circuit using a single wire that relies n the metal structures of the vehicle, such as the frame or body, as a ground.

Sintered

A somewhat porous metallic bearing formed by pressing particles of powdered metal to a temperature at which the adhere to each other.

Sintered Brake Lining

A term used for metallic brake lining.

Sinusoidal

Refers to the even waveform of an alternating current.

SIP

State Implementation Plan.

SIR

Supplemental inflatable restraints.

Six Holer

A six-cylinder engine.