Air-fuel ratio detecting apparatus for an internal combustion en

Details Air-fuel ratio detecting apparatus for an internal combustion en Air-fuel ratio detecting apparatus for an internal combustion en

1988-12-01

1989-12-26

Nelli, R. A.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02M 5100, F02D 4114

Patent

active

048890987

ABSTRACT:
An air-fuel ratio detecting apparatus for an internal combustion engine of an automotive vehicle has an air-fuel ratio sensing element disposed in the exhaust manifold of the engine, an electric heater which heats the sensing element to above its activation temperature, and a controller which controls the heater output in accordance with the operating state of the engine, a target air-fuel ratio, and at least one parameter selected from the speed of the vehicle and a temperature parameter so as to maintain the temperature of the sensing element constant even when the exhaust gas temperature of the engine varies.

REFERENCES:
patent: 4472262 (1984-03-01), Kondo et al.
patent: 4655182 (1987-04-01), Nakano et al.
patent: 4708777 (1987-11-01), Kuraoka
patent: 4715343 (1987-12-01), Kiroshita
patent: 4721088 (1988-01-01), Miono et al.
patent: 4732128 (1988-03-01), Yoshioka et al.
patent: 4753204 (1988-06-01), Kojima et al.
patent: 4765298 (1988-08-01), Kojima et al.

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