Fuel injecting device of internal-combustion engine

Abstract

Abstract PURPOSE:To provide highly accurate control of air-fuel ratio both on operating time and inoperative time of an exhaust gas reflux device by independently providing a learning control correcting means in accordance with the operation and inoperativeness of said exhaust gas reflux device and carrying out an air-fuel ratio correction for the correction of said device on inoperative time using a correcting value in the inoperative operating area. CONSTITUTION:When an exhaust gas reflux device is not operating, a learned value updating operation section C11 interopatingly updates a memory value in the area which is not updated at the inoperative time because of low cooling water temp. in a table memory C8, by means of a memory value which is updated while capable of learning and being controlled, in the surrounding area in which the cooling water temp. is high. Other components operate equally as in the operating time, and switches C9 and C10 close inoperative-time contact points S1b, S2b respectively, according to the judgement of an EGR judging section. Then a signal 12a from an ignition coil 12 causes a timer C12 to operate, and an inoperative pulse PN from the exhaust gas reflux device is sent to a drive circuit C13, which, in turn, drives a fuel injection valve 14 by means of a valve opening pulse 13b which was outputted in accordance with the pulse PN. Accordingly, learning correction can be carried out in accordance with both the operation and inoperativeness of the exhaust gas reflux device.

Inventors

• 👤 Yasuyuki Morita
• 👤 泰之 森田
• 👤 Yukinobu Nishimura
• 👤 西村　幸信
• 👤 Jiro Sumitani
• 👤 隅谷　次郎

Bibliographic Details