Air-fuel ratio control apparatus for an internal combustion engi

Details Air-fuel ratio control apparatus for an internal combustion engi Air-fuel ratio control apparatus for an internal combustion engi

1988-09-28

1990-02-27

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

36443108, F02D 4104, F02M 5100

Patent

active

049036653

ABSTRACT:
An air-fuel ratio control apparatus for an internal combustion engine operates a signal of inner pressure of cylinder and a signal of crank angle position to obtain the maximum value of a rate of pressure increase in an ignition cycle or the mean value of the maximum values in a predetermined number of cycles, whereby a fuel injection quantity is controlled by using said value. An exhaust gas temperature may be used as well as the signals of the inner pressure of cylinder and the crank angle. In this case, a fuel injection quantity is controlled on the basis of a state quantity obtained by calculating the inner pressure of cylinder and a temperature of exhaust gas.

REFERENCES:
patent: 4356551 (1982-10-01), Iwase et al.
patent: 4606312 (1986-08-01), Nakano et al.
patent: 4699106 (1987-10-01), Haraguchi et al.
patent: 4711212 (1987-12-01), Haraguchi et al.
patent: 4732126 (1988-03-01), Ikeura et al.
patent: 4800500 (1989-01-01), Tanaka
patent: 4843556 (1989-06-01), Wakeman et al.

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