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. 21, 1998
Filed:
Jun. 28, 1996
Takao Taniguchi, Okazaki, JP;
Kazumasa Tsukamoto, Toyota, JP;
Masahiro Hayabuchi, Anjo, JP;
Masaaki Nishida, Anjo, JP;
Hiroshi Tsutsui, Nishio, JP;
Muneo Kusafuka, Anjo, JP;
Masamichi Unoki, Nishio, JP;
Junichi Nishimura, Anjo, JP;
Aisin AW Co., Ltd., Aichi-ken, JP;
Abstract
The invention provides a control apparatus for an automatic transmission for carrying out neutral control and hill-hold control in a range that causes no slip of a hill-hold brake. The control apparatus has a judgment unit for determining, in accordance with a signal output by a gradient detector whether an uphill road is steep enough to cause a hill-hold brake to slip with the hill-hold brake engaged, a hydraulic pressure reducing device for reducing the hydraulic pressure applied to a hydraulic servo of a clutch in order to place the clutch in an all but released state, a hydraulic pressure applying device for applying a hydraulic pressure to a hydraulic servo of a brake in order to engage the brake, and an execution unit for permitting the hydraulic pressure reducing device to reduce the hydraulic pressure applied to the hydraulic servo and the hydraulic pressure applying device to apply a hydraulic pressure to the hydraulic servo only if a stop, or halted, state is detected by a stop-state detector and an uphill road is determined by the judgement unit not to be steep enough to cause the hill-hold brake to slip.