Apparatus for controlling boost pressure in turbocharged interna

Details Apparatus for controlling boost pressure in turbocharged interna Apparatus for controlling boost pressure in turbocharged interna

1987-07-17

1988-12-06

Koczo, Michael

Power plants

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

With supercharging means for engine

123425, F02B 3712, F02P 515

Patent

active

047888229

ABSTRACT:
A method of and an apparatus for controlling boost pressure in a turbocharged internal combustion engine. A turbine disposed in the engine exhaust passage is driven by exhaust gas and in turn drives a compressor disposed in the engine air intake passage, thus boosts the engine combustion chamber by delivering pressurized air thereto. The boost pressure is reduced when the actual ignition timing becomes more retarded than a reference ignition timing. The reference ignition timing is varied in proportion to an engine speed and/or an intake air pressure. Since the decision whether or not to reduce the boost pressure is based on the ignition timing actually being applied to the engine, no risk of damage to the engine arises and unnecessary reduction of engine output can be reliably prevented, enabling the engine to operate with optimum performance.

REFERENCES:
patent: 4509331 (1985-04-01), Hirabayashi
patent: 4715184 (1987-12-01), Oosawa et al.

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