Air-fuel controller for engine

Abstract

Abstract PURPOSE:To perform the control corresponding to the outer air temperature, by enabling the setting of the air-fuel ratio feedback control starting temperature in accordance to the cooling water temperatue at the start of engine and predicting the outer air temperature from the cooling water temperature at the starting. CONSTITUTION:A controller for controlling the air-fuel ratio of a suction mixed gas will take in the temperature at the start T0 at the step 101, and if the water temperature T0 is below 20 deg.C at the step 102 the air-fuel ratio feedback control start cooling water temperature T is brought approximately to 40 deg.C. If the water temperature at the start T0 is higher than 20 deg.C, the optimal air-fuel ratio feedback control start cooling water temperature T corresponding to he water temperature T0 is read out from a memory at the step 103. While at the step 105, the cooling water temperature T1 at that time is taken in, and if the water temperature T1 is lower than the water temperature T at the step 106, the air- fuel ratio feedback control is stopped to control the air-fuel ratio in accordance to the water temperature at the steps 111, 112 and if the water temperature exceeds over the water temperature T, the air-fuel ratio feedback control is started at the steps 107-109.

Inventors

• 👤 Yasuhiro Ishikawa
• 👤 石川　康洋

Bibliographic Details