Fuel feeding quantity control device for internal combustion engine

Abstract

Abstract PURPOSE:To improve the accuracy of air fuel ratio control by calculating a moderating coefficient based on engine operating condition factors such as the changing rate of intake air quantity - engine speed ratio, engine speed, etc. and injecting a fuel of a fuel injection quantity which is moderated by said moderating coefficient. CONSTITUTION:During the operation of an internal combustion engine, a control circuit 42 inputted an intake air quantity - engine speed ratio which represents the load of the engine in a QN and, then, judges whether the QN is larger than the moderating value QNSTi-1 of the QN which is obtained at the time of executing the last routine. When it is YES (accelerating), for example, a moderating coefficient K2 corresponding to an intake air quantity changing rate DELTAQN at that time is operated by map. And, a moderating coefficient K1 corresponding to an engine speed is also operated by map, and the product of multiplying both coefficients K1, K2 is used as the final moderating value to operate a moderating value QNST at the time of accelerating. And, the fuel injection quantity is operated based on this QNST, to control a fuel injection valve 25.

Inventors

• 👤 Masanori Torii
• 👤 鳥居　正則

Bibliographic Details