Electronic air-fuel ratio control system for internal- combustion engine

Abstract

Abstract PURPOSE:To enable to control the air-fuel ratio properly from the time of sudden acceleration to the time of slow acceleration by a method wherein a time constant for a means for correcting the increasing amount of acceleration is made variable in accordance with the valve opening speed of a throttle valve or the varying speed of an operation parameter for the engine. CONSTITUTION:The output (a) of a throttle valve opening degree detecting means 6 is inputted into a differentiating circuit consisting of a capacitor 10 and a resistor 11 while the output (b) of the differentiating circuit is inputted into a booster 14. The output of the booster 14 is inputted into a delay means consisting of the capacitor 15, grounded at one terminal thereof, a constant voltage element 16 grounded at one terminal through the resistor 17 and the resistor 18 grounded at one terminal thereof. The output of the delay means is inputted into the correcting means 12 for the increasing amount of acceleration and controls a fuel amount regulating means 4 through an air-fuel ratio operating means 12. According to such a constitution, a correction of increasing amount determined by the small time constant is effected upon the sudden acceleration while the correction of the increasing amount determined by a large time constant is effected upon the slow acceleration.

Inventors

• 👤 Yuji Kishimoto
• 👤 雄治 岸本

Bibliographic Details