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, 2015
Filed:
Oct. 25, 2011
Yoshio Morita, Fuji, JP;
Takayuki Nagase, Fuji, JP;
Takaaki Matsui, Fuji, JP;
Jatco Ltd, Fuji-shi, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A hydraulic pressure control apparatus includes a solenoid valve; a hysteresis hydraulic pressure correction amount calculation section calculating a hysteresis hydraulic pressure correction amount and a command current control section controlling the command current in accordance with the hysteresis hydraulic pressure correction amount. The hysteresis hydraulic pressure correction amount calculation section has, as a reference map, a full hysteresis characteristic, and is configured to make a plurality of reduction maps obtained by reducing the reference map in accordance with a turn-round position at one of minor loops from a past to a present time when the minor loop continues, and to calculate the hysteresis hydraulic pressure correction amount by summation of hysteresis hydraulic pressure correction amounts obtained by the reduction maps in the same command current position.