Supercharging pressure control device

Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine

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F02B 3712

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active

058292543

ABSTRACT:
According to the supercharging pressure control device of the present invention, the speed of the turbocharger of an internal combustion engine for an aircraft is controlled by adjusting the opening of a waste gate valve. In the control device of the internal combustion engine, an inlet air flow rate of a turbocharger compressor, an inlet air pressure, an inlet air temperature, and an air-fuel ratio of the internal combustion engine are detected by respective corresponding sensors. Under these conditions, a pressure ratio of the compressor where the turbocharger is operated near the maximum allowable speed is calculated. At the same time, the waste gate valve opening is controlled so as to obtain the calculated pressure ratio. By this, the turbocharger is constantly operated near the maximum allowable speed. Therefore it becomes possible to operate the internal combustion engine with the maximum supercharging pressure under the operating conditions.

REFERENCES:
patent: 4849897 (1989-07-01), Ciccarone
patent: 5363652 (1994-11-01), Tanaka et al.
patent: 5440879 (1995-08-01), Dellora
patent: 5605044 (1997-02-01), Zimmer et al.
Bent, Ralph D. et al., "Aircraft Powerplants" Fifth Edition, pp.160-162, 1978.
"Maintenance Notes (1), Aircraft Engines", (first printing of first version was published on Jul. 10, 1981 by Japan Aircraft Engineering Association).

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