Document Type and Number:
Japanese Patent JPH0226698
Kind Code:
B2
Abstract:
A stepping motor is driven to control an opening area of an intake air flow rate control valve such that an engine rotational speed in a substantially full-close position of a throttle valve is brought into a target rotational speed range related to at least an engine coolant temperature. An intake air quantity into an engine and engine rotational speed are detected to determine a ratio of the intake air quantity to the engine rotational speed. Downward control to the intake air flow rate control valve is inhibited when a ratio of intake air quantity into an engine to the engine rotational speed is smaller than a predetermined reference.
Inventors:
KOBAYASHI NOBUYUKI
ITO HIROSHI
HISAMA TAKAHIDE
ITO HIROSHI
HISAMA TAKAHIDE
Application Number:
JP12688981A
Publication Date:
June 12, 1990
Filing Date:
August 13, 1981
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD
International Classes:
F02D41/16; F02D31/00; F02D41/22