Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1983-08-17
1985-03-19
Lall, Parshotam S.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, 73 23, F02M 5100
Patent
active
045052468
ABSTRACT:
A method for operating a closed loop air/fuel ratio control system of an internal combustion engine determining the quantity of fuel to be supplied to the engine in accordance with an output signal of an exhaust gas oxygen sensor placed in an exhaust system of the engine, comprising steps for initiating a supply of an electric current to the exhaust gas oxygen sensor immediately after an ignition switch is turned on and for discriminating the activation state of the oxygen sensor by comparing the level of a combined output voltage of the oxygen sensor with a predetermined reference voltage level, at a time when a predetermined time period has passed after the supply of the electric current to the oxygen sensor, whereby eliminating a mistake of judgment which might occur due to the delay characteristics of a controller unit which determines the operational sequence of closed loop air/fuel ratio control system.
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Hosokawa Takehiko
Nakajima Toyohei
Honda Giken Kogyo Kabushiki Kaisha
Lall Parshotam S.
Matsushita Electric - Industrial Co., Ltd.
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