Control system for internal combustion engine

Abstract

Abstract PURPOSE: To permit highly precise ir-to fuel ratio control by correcting sensor outputs and injection valve operating characteristics on the basis of theoretical air- to-fuel information detected by an oxygen sensor with use of functions of condition determination, calculation and momorization. CONSTITUTION: A control circuit, which receives detection signals from an air flow meter 14, a water temperature sensor 96, an intake air temperature sonsor 16, an exhaust air temperature sensor 84, a throttle valve position detector 24, an EGR unit 28 and a λ sensor 80 and produces control signals to a fuel injection valve 66, an ignition coil 40, an EGR unit 28 and an air regulator 48, is provided with an input output unit 120, which is constructed to transmit one of its input signals selected on the basis of a command from a CPU from a multiplexer 122 to an A/D converter 124. Further, memories RAM116 and ROM 18 are provided, with the memory RAM116 serving to memorize the ratio K of the quotient obtained by dividing the air flow rate by the rpm to the rate of fuel supply COPYRIGHT: (C)1979,JPO&Japio

Inventors

• 👤 Takao Sasayama
• 👤 Seiji Suda

Bibliographic Details