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HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS (steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid F01K; gas-turbine plants F02C; jet-propulsion plants F02K); USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
Definition statement
This subclass covers:

Hot-gas or combustion product positive-displacement engine plants and use of waste heat of combustion engines, not otherwise provided for.

Hot gas positive-displacement engine plants (positive-displacement engine plants characterised by the working gas being generated by combustion in the plant F02G 3/00)
Definition statement
This group covers:

Hot gas positive-displacement engine plants, e.g. Stirling engines.

References relevant to classification in this group
This group does not cover:

Steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid

Gas-turbine plants

Jet-propulsion plants

Informative references
Attention is drawn to the following places, which may be of interest for search:

Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant

Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Plant

an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam.

the engine being operated by expansion and contraction of a mass of working gas which is heated and colled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engine
Definition statement
This subgroup covers:

"Stirling" type engines.

Stirling engines are divided in three types:

  • Alpha.

Pairs of sealed pistons in separate cylinders (no displacer).

a. with parallel pistons.

b. with cylinders opposed in line.

c. with cylinders opposed parallel.

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  • Beta.

Piston - displacer arrangement: piston and displacer in the same

cylinder. Cylinder has a hot end and a cool end:

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  • Gamma.

Piston - displacer arrangement : piston and displacer in separate cylinders:

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having at least two working members, e.g. pistons, delivering power output
Definition statement
This subgroup covers:

Stirling type engine having at least two working members, e.g. pistons, delivering power output. E.g. Vuilleumier cycle:

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Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant
Definition statement
This group covers:

Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant, e.g. positive displacement engine plants with external combustion:

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References relevant to classification in this group
This group does not cover:

Stirling engines

Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Plant

an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam.

Profiting from waste heat of combustion engines, not otherwise provided for
Definition statement
This group covers:

Profiting from waste heat of combustion engines, not otherwise provided for, e.g. converting heat directly to electric power via a thermoelectric generator using the Seebeck effect or converting the waste heat to mechanical power using a Rankine cycle.

References relevant to classification in this group
This group does not cover:

Exhaust or silencing apparatus combined or associated with devices profiting by exhaust heat

Vehicle heating derived from propulsion plant

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Last Modified: 10/11/2013