Document Type and Number:
Japanese Patent JPS64583
Kind Code:
B2
Abstract:
A method of controlling the duty ratio of operation of a solenoid control valve in a fluid passage to control the flow rate of fluid in the fluid passage to a desired value. A flow rate value range is divided into a plurality of flow rate value regions between first and second extreme flow rate values which the fluid can assume when the duty ratio assumes corresponding minimum and maximum values. A first predetermined duty ratio value is preset corresponding to each of the divided regions and dependent upon the magnitude of manufacturing variations of the duty ratio-to-flow characteristic of the valve. A second larger predetermined duty ratio value is preset corresponding to each of the divided regions. The duty ratio is set to the second predetermined value or the first predetermined value corresponding to one of the divided regions within which the desired flow rate value falls, when the detected flow rate value is on the side of the first extreme flow rate value or on the side of the second extreme flow rate value adjacent the desired flow rate value, respectively.
Inventors:
NAKAJIMA TOYOHEI
TOMONO KYOHISA
TOMONO KYOHISA
Application Number:
JP11872183A
Publication Date:
January 06, 1989
Filing Date:
June 30, 1983
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
F01N9/00; F02D21/08; F02D31/00; F02D41/00; F02D41/16; F02D41/20; F02D45/00; F02M3/07; F02M7/24; F02M25/07; F16K31/06
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