Control system for internal combustion engines

Details Control system for internal combustion engines Control system for internal combustion engines

1995-09-12

1996-08-20

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02M 2508, F02D 4114

Patent

active

055469221

ABSTRACT:
A control system for an internal combustion engine controls a fuel injection amount based on operating conditions of the engine and an evaporative fuel concentration-dependent correction coefficient. The control system includes a purge control valve arranged in a purging passage connecting a canister for temporarily storing evaporative fuel generated from a fuel tank and an intake passage. This coefficient is held to a predetermined value for a predetermined time period after purging is permitted, and to another for a predetermined time period after purging is inhibited. In another aspect, the purge control valve is controlled based on operating conditions of the engine and a purging flow rate correction coefficient. This coefficient is held when purging is inhibited, and is progressively set to a larger value depending on the evaporative fuel-dependent correction coefficient, after purging is permitted. In another aspect, when a vehicle on which the engine is installed is started, the purge control valve is controlled based on a special purging control amount which is progressively increased based on a parameter related to a standing start of the vehicle. In another aspect, the operation of the purge control valve is inhibited for a predetermined time period dependent on a temperature of the engine, after the start of the engine.

REFERENCES:
patent: 5188085 (1993-02-01), Habaguchi et al.
patent: 5216995 (1993-06-01), Hosoda et al.
patent: 5216997 (1993-06-01), Osanai et al.
patent: 5381776 (1995-01-01), Matsubara et al.
patent: 5406927 (1995-04-01), Kato et al.
patent: 5419302 (1995-05-01), Abe

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