Glossary “thermal vent valve” Definition:
Temperature sensitive valve assembly located in the canister vent line. Closes when the engine is cold and opens when hot. Prevents fuel tank vapors from being vented through the carburetor fuel bowl.

Glossary “thermal paint” Definition:
A paint that either melts or changes color when a specific temperature has been reached.

Glossary “thermal reactor” Definition:
An obsolete early attempt of an emissions-control device comprising a large, heavy, exhaust manifold in which hydrocarbons and carbon monoxide that escape from the cylinders are oxidized.

Glossary “thermal stability” Definition:
Ability of a device to reach and maintain a specific temperature for a long period of time.

Glossary “thermal limiter” Definition:
Electrical or mechanical device, similar to a fuse, that opens at 300¡ãF to control the intensity or quantity of heat.

Glossary “thermal fuse” Definition:
Temperaturessensitive fuse link designed so that it melts at a certain temperature and opens a circuit.

Glossary “thermal cutting” Definition:
Cutting process that removes metal by localized melting, burning, or vaporizing of the work piece.

Glossary “thermal delay fuse” Definition:
Device once used in conjunction with the compressor protection switch that heats and blows a fuse to stop a compressor action during abnormal operation. Also found in electrical circuits that open in response to higher than rated current flow.

Glossary “thermal efficience” Definition:
Difference between potential and actual energy developed in a fuel measured in Btu’s per pound or gallon (kilogram or liter).

Glossary “thermal efficiency” Definition:
The ratio of how effectively an engine converts a fuel’s heat energy into usable work.