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:
Nov. 11, 2014
Filed:
Mar. 18, 2010
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Nishio, JP;
Yoshimitsu Hyodo, Nishio, JP;
Kazunori Ishikawa, Toyota, JP;
Hironori Sugiura, Hekinan, JP;
Satoshi Nishio, Kota, JP;
Kazuki Kojima, Kariya, JP;
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Nishio, JP;
Yoshimitsu Hyodo, Nishio, JP;
Kazunori Ishikawa, Toyota, JP;
Hironori Sugiura, Hekinan, JP;
Satoshi Nishio, Kota, JP;
Kazuki Kojima, Kariya, JP;
Aisin Aw Co., Ltd., Anjo, JP;
Abstract
A hydraulic control apparatus for an automatic transmission has a circulating oil supply passage that supplies circulating oil to a starting apparatus, a circulating oil discharge passage that discharges circulating oil from the starting apparatus, and a speed change mechanism oil supply passage that supplies oil to a speed change mechanism. The oil discharged from an oil pump is supplied to the starting apparatus and the speed change mechanism. A first flow rate changing device that can change the flow rate of the circulating oil is arranged in the circulating oil discharge passage. A first flow rate instructing portion output a command to the flow rate changing device to change the flow rate when the amount of oil discharged from the oil pump is low, and reduces the flow rate to the starting apparatus, which enables the hydraulic pressure necessary for shifting to be obtained in the speed change mechanism.