Methods of supercharging a diesel engine, in supercharged diesel

Details Methods of supercharging a diesel engine, in supercharged diesel Methods of supercharging a diesel engine, in supercharged diesel

1976-09-08

1978-11-21

Casaregola, Louis J.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

60619, F02B 3700, F02B 3708

Patent

active

041259998

ABSTRACT:
An internal combustion engine of the expansible chamber type and preferably a diesel engine is equipped with a turbo-compressor unit, comprising at least one compressor and at least one turbine, and at least one bypass pipe enabling direct and permanent passage for the air delivered through the compressor to the turbine inlet.
The diesel engine is supercharged by the compressor driven by the turbine. Regulating means are provided to limit the rotary speed of the supercharging unit so that it operates at or above a minimum threshold value such that the engine, which has a compression ratio of less than 12, can be started and kept running at low power without difficulty. For engines requiring scavenging, throttle means with variable passage cross section are arranged so as to be traversed by generating between the upstream and downstream parts of the bypass pipe a pressure difference which is an increasing function of the pressure existing in the upstream part regardless of the engine speed and therefore which is independent of the air flow passing through said throttle means. The increasing function may be a linear or substantially linear function. A combustion chamber is arranged upstream of the turbine and supplied by air which has passed through the bypass pipe, by fuel under the control of the regulating means and also, in some embodiments, by exhaust gases from the engine.

REFERENCES:
patent: 2633698 (1953-04-01), Nettel
patent: 3096615 (1963-07-01), Zuhn
patent: 3423927 (1969-01-01), Scherenberg

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