The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2013
Filed:
Sep. 16, 2009
Yoshihiro Takei, Kanagawa, JP;
Yasushi Yamamoto, Kanagawa, JP;
Hiroyuki Kawanishi, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A clutch control device for vehicle equipped with a clutch actuator driven by a working fluid, wherein secular change in the flow rate control valve for controlling the working fluid is compensated, and the rate of connection of the clutch is correctly controlled by a simple means. To control the stroke of a clutch actuator, the clutch control device is provided with a single flow rate control valvethat controls the feed and discharge of the working fluid by using an electromagnetic solenoid. A flow rate control valve control deviceis provided with a learning devicethat learns the neutral position of the flow rate control valvewhich shuts off the flow of the working fluid, separately detects the amounts of electric current to a coilof when the rate of change in the stroke becomes zero depending upon the directions in which the valve body of the flow control valvemoves, and learns the central point at the neutral position by averaging the detected values. In controlling the stroke of the clutch, the amount of electric current to the coilis corrected based on the learned value to compensate for a change in the flow rate characteristics by secular changes.