Acceleration slip preventing method for vehicle

Abstract

Abstract PURPOSE:To prevent acceleration slip by combining the actions of leaning mixture. delaying the ignition timing and resting some of cylinders by steps in accordance with the detected acceleration slip amount of a driving wheel to successively reduce the generated torque of an engine. CONSTITUTION:According to the detected signals from a driving when speed sensor 11 and a driven wheel speed sensor 12. the ECU 13 calculates the acceleration slip ratio S of a driving wheel and sends the calculated data to an engine ECU 14. Next, the ECU 14 controls the driving mode of injectors 1 to 4 to lean the fuel mixture until the received acceleration slip ratio S increases to S1. The ECU 14 then controls whose injectors 1 to 4 to lean the fuel mixture and the ignition timing regulating means 15 to delay the ignition timing during the period from the point of the acceleration slip ratio S in excess of S1 to the point that the ratio S reaches S2. In the next step, during the period from the point of the acceleration slip ratio S in excess of the S2 to the point that the ratio S reaches S3, the ECU 14 makes driving control of the injectors to interrupt both the mixture leaning and ignition timing delay in two cylinders and to lean the mixture in the rest two cylinders. When the ratio S exceeds the S3, the ECU 14 rests two cylinders and controls driving of the ignition timing regulating means 15 to delay the ignition timing and the injectors to lean mixture. Thus the engine output can be reduced by combining those steps.

Inventors

• 👤 Masayuki Hashiguchi
• 👤 雅幸 橋口
• 👤 Kiichi Yamada
• 👤 喜一 山田
• 👤 Susumu Nishikawa
• 👤 進 西川
• 👤 Shuji Ikeda
• 👤 池田　周司

Bibliographic Details