Fuel injection quantity control device of multi-cylinder internal-combustion engine

Abstract

Abstract PURPOSE:To suppress excessive fuel feed in several combustion strokes following the combustion stroke just after acceleration by sensing the total amount of asynchronous injection from a synchronous injection till another and by making a reducing correction of the subsequent synchronous injection in accordance with the amount sensed. CONSTITUTION:The J1 and J2 in a synchronous injection and X1 and -X4 in asynchronous injection have influence upon Cylinder #3. Cylinder #3 which makes combustion stroke just after acceleration is fed with a fuel amount Q near the requisite value Qf by the synchronous injection regardless of delay in response of an air flow meter. As this synchronous injection has influence also upon Cylinders #4, #2 and #1 to make the combustion stroke, which follows the combustion stroke just after acceleration and in which the delay in response of air flow meter is being eliminated, so that total amount in asynchronous injection is sensed, and if the sensed value is above the specified value the width of synchronous injection J3 just after acceleration shall be suppressed from A1 to A1'. Thereby overrich mixture in the cylinders to make combustion strokes following the one just after acceleration can be suppressed. This software is entered in the ROM in the form of a program.

Inventors

• 👤 Haruo Watanabe
• 👤 渡辺　治男

Bibliographic Details