Fuel injection quantity learning controller for internal combustion engine

Abstract

Abstract PURPOSE:To prevent exhaust emission or the like from worsening by judging whether an air-fuel ratio is biased to the rich side or the lean side or not on the basis of a deviation at each time in both rich and lean states of the air-fuel ratio, and thereby learning each factor of accelerating increment or decelerating decrement. CONSTITUTION:An engine 20 is controlled by a microcomputer 44. And, each detected signal out of an intake temperature sensor 4, a pressure sensor 6, an idle switch 10, an oxygen sensor 30 and a cooling sensor 34, etc., is inputted into this microcomputer 44. A spark plug 38 installed in each cylinder of the engine 20 is connected to the microcomputer 44 via an igniter fitted with a distributor 40 or the like, while a turning angle sensor 48 is installed in this distributor 40. In this case, the microcomputer 44 judges whether an air-fuel ratio is biased to the rich side or the lean side or not on the basis of a deviation at each time in both rich and lean states of the air-fuel ratio, and it learns each flow factor of acceleration or deceleration.

Inventors

• 👤 Yoshiyuki Tanaka
• 👤 Hiroshi Okano
• 👤 Naoto Kushi

Bibliographic Details