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:
Dec. 11, 2007
Filed:
Sep. 29, 2005
Yoshihisa Kodama, Yokohama, JP;
Midori Yamaguchi, Yokohama, JP;
Hisao Nobu, Tokyo, JP;
Kouhei Wakida, Kanagawa, JP;
Yoshihisa Kodama, Yokohama, JP;
Midori Yamaguchi, Yokohama, JP;
Hisao Nobu, Tokyo, JP;
Kouhei Wakida, Kanagawa, JP;
JATCO Ltd, Shizuoka, JP;
Abstract
A hydraulic control apparatus for an automatic transmission with a line pressure regulator valve operative to regulate an oil pressure produced by an oil pump and set a line pressure, the hydraulic control apparatus including a control unit outputting a first command for controlling the line pressure regulator valve to set the line pressure to a minimum value immediately after engine start, and a second command for controlling the line pressure regulator valve to set the line pressure to a target value in accordance with increase in engine speed. The control unit is programmed to set the target value of the line pressure to a value smaller than a maximum value of the line pressure and/or reduce a target speed of engine speed, upon start of the engine in a low temperature condition.