| 摘要 |
An air/fuel ratio control system equipped with a temperature sensor fail-safe system for an internal combustion engine, comprises an engine parameter detecting circuit for the estimation whether the engine coolant temperature sensor is normal or not, a constant voltage supply, and a switching circuit for transmitting the constant voltage to a control signal generator, in place of the output signal of the engine coolant temperature sensor, the control signal generator generating a control signal in accordance with various engine parameters including the engine temperature for the control of the air/fuel ratio of an air/fuel mixture supplied to the engine, thereby providing the control signal generator with a suitable signal when a failure occurs in the engine coolant temperature sensor to prevent undesirable operation. |
