Control system for boost pressure in internal combustion engine

Details Control system for boost pressure in internal combustion engine Control system for boost pressure in internal combustion engine

1989-06-13

1991-07-16

Hart, Douglas

Power plants

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

With supercharging means for engine

123564, F02B 3700

Patent

active

050314068

ABSTRACT:
A system for controlling a boost pressure in an internal combustion engine is equipped with a turbocharger. Engine operation is divided into three regions based on an engine speed with respect to an engine load. Throughout the regions, a target boost pressure is predetermined to be considerably lower than a level at which knock frequently occurs. In the region where the engine speed and load are relatively high, the target boost pressure is gradually raised until knock occurs. When knock occurs, the target boost pressure is fixed at a value slightly lower than the value at which knock has occurred and thereafter the boost pressure is controlled to the fixed target pressure.

REFERENCES:
patent: 4519210 (1985-05-01), Iwamoto
patent: 4617799 (1986-10-01), Todokoro
patent: 4646522 (1987-03-01), Mamiya
patent: 4788822 (1988-12-01), Mieno

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