Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1990-04-03
1991-02-19
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
F02M 5100
Patent
active
049933922
ABSTRACT:
An apparatus for controlling a heater for heating an oxygen sensor provided in an exhaust gas flow passage of an internal combustion engine disposed in an automotive vehicle includes a detection circuit, a decision circuit and a power supply control circuit. The monitor circuit detects a driving condition parameter of the automotive vehicle. The decision circuit determines, from a driving condition represented by the driving condition parameter detected by the detecting circuit, whether or not a power supply control to the heater should be executed. The power supply control circuit supplies, during a predetermined period of time, the heater with an amount of power which is smaller than that to be supplied thereto in a normal driving condition when it is determined that the power supply control to the heater should be executed by the decision circuit so that a resistance value of said heater is controlled to a target resistance value.
REFERENCES:
patent: 4715343 (1987-12-01), Kinoshida
patent: 4895123 (1990-01-01), Uchinami et al.
patent: 4935196 (1990-07-01), Hoshi et al.
patent: 4947819 (1990-08-01), Takahashi et al.
Goudo Masaru
Hoshi Koichi
Masaki Ritsuo
Suzuki Mitsuhiro
Tanaka Hiroshi
Greason Edward W.
Nelli Raymond A.
Toyota Jidosha & Kabushiki Kaisha
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