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. 14, 2017
Filed:
Jan. 20, 2014
Aisin Aw Co., Ltd., Anjo-shi, Aichi-ken, JP;
Hiroyuki Kutsubo, Anjo, JP;
Yoshimitsu Hyodo, Nishio, JP;
Kenichi Tsuchida, Nishio, JP;
Naoyuki Fukaya, Okazaki, JP;
Kazunori Ishikawa, Tokyo, JP;
AISIN AW CO., LTD., Anjo, JP;
Abstract
A hydraulic control device includes a Crelay valvewhose state is switched based on a signal pressure that is generated based on a line pressure PL, and a check valveattached to a drain oil passage L. A set pressure of the check valveis adjusted to an oil pressure that is lower than the maximum oil pressure obtained by discharge capability of an electromagnetic pumpand higher than an SLpressure Pslremaining in a hydraulic servo of a clutch Cwhen the state of the Crelay valveis switched after a mechanical oil pumpis stopped. Operation of the electromagnetic pumpis started before the state of the Crelay valveis switched after the mechanical oil pumpis stopped.