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In an air-fuel ratio control device, a torque detector for detecting torque variations which indicate combustion variations in an engine is mounted at the supporting portions of the internal combustion engine. A detecting signal from the torque detector is introduced into an electronic control unit

In an air-fuel ratio control device, a torque detector for detecting torque variations which indicate combustion variations in an engine is mounted at the supporting portions of the internal combustion engine. A detecting signal from the torque detector is introduced into an electronic control unit which controls the amount of injecting fuel, namely the air-fuel ratio. The electronic control unit controls the air-fuel ratio toward the lean side by the signal from the torque detector so that the combustion variations (torque variations) in the engine does not become large.

대표청구항 ▼

An air-fuel ratio control device for an engine having an engine mount, comprising torque detection means for outputting detection signals from a pressure sensor axially mounted on the end of an engine arm the other end of which is connected to said engine, said pressure sensor being compressed betwe

An air-fuel ratio control device for an engine having an engine mount, comprising torque detection means for outputting detection signals from a pressure sensor axially mounted on the end of an engine arm the other end of which is connected to said engine, said pressure sensor being compressed between a rubber mount cover covering a rubber mount mounted on said engine mount and a flange on said engine arm; fuel-injector means for selectively injecting fuel into said engine; and control means for controlling at least the fuel injector means to control the air-fuel ratio of said engine in accordance with said detection signals, said control means including means for producing a fuel injector control signal by processing said detection signals through a bandpass filter of 1 to several Hz frequency band, comparing said filtered detection signals with a desired air-fuel ratio control value and outputting a command signal to said fuel injector based on said comparison.