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:
Apr. 13, 1999
Filed:
Oct. 21, 1996
Koichi Hasegawa, Wako, JP;
Akio Tsuura, Wako, JP;
Yoshinori Yamamoto, Wako, JP;
Kazuhiro Nakajima, Wako, JP;
Takashi Arai, Wako, JP;
Kouji Shibuya, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A facing surface of a clutch piston is previously moved to a position just before it abuts against an inner surface of a torque converter cover, or a position in which it extremely slightly abuts against the inner surface of the torque converter cover by outputting an initial engage pressure YMIN set in accordance with a vehicle speed and the like only for a predetermined time TMPS prior to the start of engagement of a lockup clutch. When the engagement of the lockup clutch is started, the engage pressure is gradually increased. When the engage pressure approaches a target pressure set in accordance with the target speed ratio, a feedback control of the engage pressure is carried out such that the actual speed ratio of the torque converter is converged to the target speed ratio. Thus, when the lockup clutch of the torque converter is brought into an engaged state, the responsiveness can be enhanced while preventing the generation of a shock.