Title:
【発明の名称】内燃機関の吸入空気量制御装置
Document Type and Number:
Japanese Patent JP3092442
Kind Code:
B2
Abstract:
The idle speed control device according to the present invention controls a two-solenoid rotary type idle speed control valve properly even when one of the solenoids fails. When one of the solenoids fails, the device calculates the amount of bypass air from the amount of inlet air and the degree of opening of the throttle valve, and estimates the degree of opening of the idle speed control valve. If the degree of opening of the bypass valve is larger than that of the neutral valve position, the device sets the duty ratio of the control signal for driving the idle speed control valve at 0 %, and if the degree of opening of the idle speed control valve is less than that of the neutral valve position, the device sets the duty ratio of the control signal at 100 %. By this control, the two-solenoid rotary type idle speed control valve is maintained at neutral valve position without determining the type of the failure of the solenoids precisely.
Inventors:
Akio Okamoto
Hirohisa Kishi
Hirohisa Kishi
Application Number:
JP8851794A
Publication Date:
September 25, 2000
Filing Date:
April 26, 1994
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D31/00; F02D41/22; F02D11/10; (IPC1-7): F02D41/22
Domestic Patent References:
| JP526084A | ||||
| JP4301159A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)