Engine control with positive crankcase ventilation

Details Engine control with positive crankcase ventilation Engine control with positive crankcase ventilation

1993-03-09

1994-07-26

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123698, 123572, F02D 4114

Patent

active

053319400

ABSTRACT:
A closed loop control for an internal combustion engine with a positive crankcase ventilation is disclosed. According to this control system, the appearance of blowby gas is detected in response to variation in feedback correction coefficient (alpha), and a product of a transient blowby gas variable (BTBL) and a time dependent factor (B.sub.T) is calculated and a blowby gas recirculation coefficient (KBLRC) is modified by this product (BTBL.times.B.sub.T) to give a modified blowby gas recirculation coefficient (KBLRC2). This modified coefficient is used in calculating a fuel injection amount (Ti) during supply of substantial blowby gas to the combustion engine after start-up of the engine.

REFERENCES:
patent: 4003350 (1977-01-01), Eisele et al.
patent: 4640257 (1987-02-01), Kodama et al.
patent: 4744344 (1988-05-01), Morozumi
patent: 4825841 (1989-05-01), Norota et al.
patent: 4869223 (1989-09-01), Shimomura et al.
patent: 5228424 (1993-07-01), Collins

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