Controller for engine

Abstract

Abstract PURPOSE:To improve the reduction effect for torque shock by executing control so that the engine output reduction quantity reduces as the air-fuel ratio becomes lean when a specific condition is fulfilled, in the constitution in which torque shock is prevented by reducing the engine output when the specific condition is fulfilled. CONSTITUTION:During the operation of an engine 1, a control unit 7 judges if shift-up is to be executed or not by judging each output signal of a throttle opening degree sensor 8 and an engine revolution speed sensor 9 is larger than each prescribed value or not, and if the judgment is 'YES', a speed change instruction is transmitted. When it is judged that the estimated revolution speed after the shift-up is larger than a set value and brake is not applied, a delayed angle signal is generated after the lapse of a prescribed time. In comparison with a delayed angle map for the air-fuel ratio, the delayed angle quantity Ig is calculated so as to be reduced as the air-fuel ratio becomes lean, and the delayed angle quantity Ig is subtracted from the delayed angle quantity Ig which is calculated according to the operation state, and the delayed angle control is executed according to the delayed angle quantity Ig thus obtained.

Inventors

• 👤 Tsutomu Nakayama
• 👤 勉 中山
• 👤 Hiroshi Tokushige
• 👤 大志 徳重
• 👤 Masatoshi Shoji
• 👤 小路　正敏

Bibliographic Details