Aisan Kogyo Kabushiki Kaisha

Naoya Okawa

Yukitoshi Asada

LPG decompressed in a regulator is fed as primary fuel into an intake passage from a carburetor, and is fed as supplementary fuel to the intake passage from an injector. An ECU controls a control variable for the injector to cause an air/fuel ratio detected in an oxygen sensor to be a stoichiometric air/fuel ratio. At idle operation, an optimum state of the control variable with respect to a target value is output from a monitor terminal and is monitored, and an adjusting screw in a slow passage is operated and adjusted to cause the control variable to be the target value. An adjustment range for the control variable is set into two stages through operation of the test terminal. The ECU controls an output pattern of a monitor terminal in individual adjustment ranges at each stage, according to whether or not the control variable falls within the adjustment range.

Growing community of inventors

Obu, Japan

Naoya Okawa