Glossary “Simpson gear set” Definition:
Gear set having two simple planetary gears mounted on a common sun gear.
s
SILN
Glossary “SILN” Definition:
Silencer Exhaust Air Supply
silver solder
Glossary “silver solder” Definition:
Filler alloy that contains up to 45% silver, that melts at 1,120¡ãF and flows at 1,145¡ãF.
silicone controlled rectifier (SCR)
Glossary “silicone controlled rectifier (SCR)” Definition:
A semiconductor diode device used in controlling large amounts of DC current or voltage.
silicone fluid
Glossary “silicone fluid” Definition:
Fluid made of chemicals with a silicone carbon bond; adaptable for many industrial uses.
silicone jackets
Glossary “silicone jackets” Definition:
High-temperature coverings for spark plugs.
silica gel
Glossary “silica gel” Definition:
Drying agent used in many automotive applications, such as an air-conditioner desiccant because of its ability to absorb large quantities of water.
silicon
Glossary “silicon” Definition:
1). An element. 2). One of the elements known as semiconductors that have exactly 4 electrons in there valance shell used to creat semiconductor devices.
silicon-killed steel
Glossary “silicon-killed steel” Definition:
Steel alloy that has been killed with silicon in the molten stage to refine its grain structure.
silicone
Glossary “silicone” Definition:
A group of organic compounds based on the non-metallic element, silicon (Si).
silencer
Glossary “silencer” Definition:
A device, such as a muffler, designed to reduce noise.
silent block
Glossary “silent block” Definition:
A rubber mound designed to reduce noise due to vibration.
silent chain
Glossary “silent chain” Definition:
Made up of flat links that pivot around a pin. Each link is a series of plates held together by the pins. The number of plates determines chain width.
SIGRTN
Glossary “SIGRTN” Definition:
Signal Return, Dedicated sensor ground circuit that is common to 2 or more sensors.
SIL
Glossary “SIL” Definition:
Shift Indicator Light
signal generator
Glossary “signal generator” Definition:
Test instrument for generating standard signals, used to analyze circuit performance. Some VRS may be referred to as signal generators.
signal return (SIG RTN)
Glossary “signal return (SIG RTN)” Definition:
A sensor ground circuit.
signature voltage signal
Glossary “signature voltage signal” Definition:
A waveform characteristic that makes it possible to distinguish from other, similar waveforms. Caused by the circuits unique configurations or ware patterns
Significant New Alternatives Policy (SNAP)
Glossary “Significant New Alternatives Policy (SNAP)” Definition:
A rule established in 1994, under Section 612 of the 1990 Clean Air Act (CAA) to initiate a program in which the Environmental Protection Agency (EPA) is to evaluate applications for use of substitute chemical and technology designated to replace ozone depleters in specific uses, including flammability, chemical toxicity, global-warming potential, exposure of workers, consumers, the general public, and aquatic life.
sight glass
Glossary “sight glass” Definition:
A glass window in the liquid line or top of the receiver-drier used to observe the liquid refrigerant flow in an air conditioning system.