Boost pressure control system for a supercharged engine

Details Boost pressure control system for a supercharged engine Boost pressure control system for a supercharged engine

1991-07-23

1992-09-29

Koczo, Michael

Internal-combustion engines

Charge forming device

Supercharger

123564, F02B 3300

Patent

active

051506939

ABSTRACT:
A boost pressure control system for an engine, by which the degree of opening of the air bypass valve is adjusted and on/off of a mechanical supercharger operation is controlled to obtain an appropriate boost pressure. In the system, the degree of opening of the air bypass valve is adjusted in accordance with the load of the engine, based on different characteristics selected in accordance with whether the operation of the supercharger is started or stopped. If the engine is operated in a non-boost region, when the supercharger is operating the degree of opening of the air bypass valve is made larger to reduce the compression work of the supercharger, and when the operation of the supercharger is stopped, the degree of opening of the air bypass valve is made smaller to ensure that the air flow through the supercharger maintains the rotation of the rotors of the supercharger.

REFERENCES:
patent: 4611568 (1986-09-01), Onaka et al.
patent: 4656992 (1987-04-01), Oonaka et al.

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