Title:
ELECTRONIC FUEL INJECTION ENGINE WITH MECHANICAL GOVERNOR
Document Type and Number:
Japanese Patent JP3223297
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stably control a working machine engine even in a severe condition by providing an air-fuel ratio control means for determining a value of air-fuel ratio corresponding to the operating state and a valve opening sensor for detecting the opening of a throttle valve.
SOLUTION: This device is provided with a throttle valve 5 for controlling the inflow quantity of air to a combustion chamber 1, a mechanical governor 6 for controlling the opening of the throttle valve 5, and a valve opening sensor 8 for substantially detecting the opening of the throttle valve 5. The mechanical governor 6 drives the throttle valve 5 in closing direction by a governor force GF. An injection setting part 32 calculates the intake quantity per one rotation of an engine on the basis of the opening of the throttle valve 5 and the engine rotating speed and determines the fuel injection quantity. An air-fuel ratio control part 33 judges a non-steady state requiring a special correction on the basis of the output of an operating state detecting part 25 and determines the value of air-fuel ratio in conformation to the operating state. According to this, the throttle valve can be controlled with good responsiveness, and also precisely and stably controlled.
Inventors:
Hiroyuki Tsuda
Dai Hayashida
Dai Hayashida
Application Number:
JP25814397A
Publication Date:
October 29, 2001
Filing Date:
September 24, 1997
Export Citation:
Assignee:
Kubota Corporation
International Classes:
F02D1/08; F02D9/00; F02D9/02; F02D29/00; F02D31/00; F02D35/00; F02D41/04; (IPC1-7): F02D41/04; F02D1/08; F02D9/00; F02D9/02; F02D29/00; F02D31/00; F02D35/00
Domestic Patent References:
| JP2176135A | ||||
| JP4219436A | ||||
| JP1203640A | ||||
| JP842380A | ||||
| JP4214940A |
Attorney, Agent or Firm:
Juichi Kitatani