Supercharged internal combustion engines
First Claim
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1. A power unit comprising:
- an internal combustion engine having variable volume combustion chambers,a supercharging turbocompressor unit having a compressor and a turbine, the inlet of said turbine being connected to receive the exhaust gas of said engine,pipe means connecting the outlet of said compressor to the intake of said engine,bypass conduit means having an inlet and and outlet always connected and open during operation of said turbocompressor unit to flow the air delivered by said compressor and not drawn by said engine to the inlet of said turbine with a pressure drop which, if appreciable, is substantially independent of the flow rate in the bypass conduit and increases with the output pressure of said compressor,heat exchanger means located upstream of the junction of the inlet of said bypass conduit means with said pipe means and operable to exchange heat between the pressurized air flow from said compressor to the engine and to said bypass conduit means and the gas flow from the turbine outlet to atmosphere,and air cooling means located in the air path between said compressor and the intake of said engine downstream of the junction of the inlet of said bypass conduit means with said pipe means so as to be flown only by the air drawn by said engine.
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Abstract
A power unit comprises an internal combustion compression ignited engine having variable-volume combustion chambers and supercharged by a turbocompressor having a turbine which receives the engine exhaust gases. A bypass pipe which is permanently open during operation of the engine returns the air not absorbed by the engine to the turbine with a pressure drop which, if appreciable, is independent of the flow rate and increases with the compressor outlet pressure. The power unit comprises a heat exchanger between the gas flow leaving the turbine and the air flow leaving the compressor. An air cooler is disposed in the path of the air travelling from the heat exchanger to the engine.
31 Citations
13 Claims
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1. A power unit comprising:
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an internal combustion engine having variable volume combustion chambers, a supercharging turbocompressor unit having a compressor and a turbine, the inlet of said turbine being connected to receive the exhaust gas of said engine, pipe means connecting the outlet of said compressor to the intake of said engine, bypass conduit means having an inlet and and outlet always connected and open during operation of said turbocompressor unit to flow the air delivered by said compressor and not drawn by said engine to the inlet of said turbine with a pressure drop which, if appreciable, is substantially independent of the flow rate in the bypass conduit and increases with the output pressure of said compressor, heat exchanger means located upstream of the junction of the inlet of said bypass conduit means with said pipe means and operable to exchange heat between the pressurized air flow from said compressor to the engine and to said bypass conduit means and the gas flow from the turbine outlet to atmosphere, and air cooling means located in the air path between said compressor and the intake of said engine downstream of the junction of the inlet of said bypass conduit means with said pipe means so as to be flown only by the air drawn by said engine.
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2. A power unit comprising:
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an internal combustion engine having variable volume combustion chamber, a supercharging turbocompressor unit having a compressor and a turbine, the inlet of said turbine being connected to receive the exhaust gas of said engine, pipe means connecting the outlet of said compressor to the intake of said engine, bypass conduit means having an inlet and an outlet always connected and open during operation of said turbocompressor unit to flow the air delivered by said compressor and not drawn by said engine to the inlet of said turbine with a pressure drop which, if appreciable, is substantially independent of the flow rate in the bypass conduit and increases with the output pressure of said compressor, an auxiliary combustion chamber connected to receive air from said bypass conduit means and to deliver combustion gas to said turbine, heat exchanger means located upstream of the junction of the inlet of said bypass conduit means with said pipe means and operable to exchange heat between the pressurized air flow from said compressor to said engine and to said bypass conduit means and the gas flow from the turbine outlet to atmosphere, and air cooling means located in the air path between said compressor and the intake of said engine downstream of the junction of the inlet of said bypass conduit means with said pipe means so as to be flown only by the air drawn by said engine. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification