Title:
AIR-FUEL RATIO CONTROL DEVICE FOR ENGINE
Document Type and Number:
Japanese Patent JP3963993
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide good air-fuel ratio control performance even in a high rotation high load operating region with air-fuel ratio feedback control difficult by an O2 sensor.
SOLUTION: When an engine operating region is in a high rotation (NE >NEH) or high load operating region (Tp>TpH), a target exhaust temperature TEXS set based on correlation of an exhaust temperature TEX and target air-fuel ratio is compared with the exhaust temperature TEX, a second air-fuel ratio feedback correction coefficient α2 is set (S27 to S34). By the second air-fuel ratio feedback correction coefficient α2, a basic fuel injection amount set at high rotation high load operating time is corrected, the final fuel injection pulse width relating to an injector is set.
Inventors:
Masayuki Yui
Application Number:
JP4941797A
Publication Date:
August 22, 2007
Filing Date:
March 04, 1997
Export Citation:
Assignee:
Fuji Heavy Industries Ltd.
International Classes:
F02D41/14; F02D45/00; (IPC1-7): F02D41/14
Domestic Patent References:
| JP9126015A | ||||
| JP58098637A | ||||
| JP4005444A | ||||
| JP4005455A | ||||
| JP57057240U | ||||
| JP3001237U | ||||
| JP63057843A | ||||
| JP7189797A |
Attorney, Agent or Firm:
Susumu Ito
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