Control apparatus for direct injection engine

Details Control apparatus for direct injection engine Control apparatus for direct injection engine

1996-12-23

1998-06-30

Nelli, Raymond A.

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

123399, 123400, 123432, F02B 3100, F02D 4104

Patent

active

057718580

ABSTRACT:
A control apparatus for a multicylinder direct injection engine includes a fuel injection valve installed at each cylinder, a secondary intake air flow path provided for generating a slewing flow of intake air taken in an intake pipe, and a gas flow control valve for controlling the slewing flow generated in each cylinder by adjusting the flow rate of air flowing through the secondary intake air flow path. The control apparatus further includes an air/fuel controller for controlling the air/fuel control ratio in each cylinder by controlling fuel injection amount without using the opening of the gas flow control valve in the respective cylinder, for a first operational region of a small amount of accelerator operation. The air/fuel controller also includes a valve opening controller for controlling the opening of the gas flow control valve, corresponding to an amount of accelerator operation, for a second operational region of an amount of accelerator operation, which is larger than the amount of accelerator operation in the first operational region. Thereby, the gas flow control valve can also serves as a throttle valve.

REFERENCES:
patent: 4909210 (1990-03-01), Shimada et al.
patent: 5186139 (1993-02-01), Matsura
patent: 5231964 (1993-08-01), Harada
patent: 5609132 (1997-03-01), Minowa et al.

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