Control method of fuel injection in internal-conbustion engine

Abstract

Abstract PURPOSE:To obtain the good response characteristic of an engine in relation to the injection action of its fuel, by determining the injection start timing of fuel to be injected in a cylinder by the injection amount of fuel injected in the cylinder by the injection amount of fuel injected in the cylinder in the preceding time, in the case of an internal-combustion engine of individual-injection system. CONSTITUTION:During operation of an engine, an electronic control unit 30, first inputting each output signal of an air flow meter 12 and a crank angle sensor 17, calculates the basic injection pulse width T of fuel from an intake air amount per one revolution of the engine and the predetermined constant. The unit 30, next correcting said pulse width T in accordance with a correction coefficient obtained from each output signal of a water temperature sensor 14 and an O2 sensor 19, calculates the final injection pulse width of fuel, that is, the injection amount of fuel. Then the injection start timing of fuel to be injected is determined by the injection amount of fuel injected in a cylinder in the preceding time. Here the injection start timing of the fuel is determined so that the injection action of the fuel in each cylinder may be completed in an intake stroke by opening an intake valve 5.

Inventors

• 👤 Michihiro Ohashi
• 👤 大橋　通宏
• 👤 Hiroki Matsuoka
• 👤 松岡　広樹

Bibliographic Details