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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.:

US 10830340 B1

PDFFull Text
Date of Patent:
Nov. 10, 2020

Filed:

Mar. 15, 2018

Hydraulic pressure control device and hydraulic pressure control method for vehicle

Applicant:

Hitachi Automotive Systems, Ltd., Hitachinaka, JP;

Inventors:

Takashi Matsuoka, Tokyo, JP;

Masashi Seimiya, Tokyo, JP;

Assignee:

HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Dirk Wright

Int. Cl.
CPC ...
B60W 10/02 (2006.01); F16H 61/00 (2006.01); B60W 10/06 (2006.01); B60W 10/103 (2012.01); B60W 10/30 (2006.01); F16H 59/14 (2006.01); F16H 59/02 (2006.01); F16H 61/02 (2006.01); F16H 59/60 (2006.01);
U.S. Cl.
CPC ...
F16H 61/0009 (2013.01); B60W 10/023 (2013.01); B60W 10/06 (2013.01); B60W 10/103 (2013.01); B60W 10/30 (2013.01); F16H 59/0204 (2013.01); F16H 59/0208 (2013.01); F16H 59/14 (2013.01); F16H 61/0248 (2013.01); F16H 59/60 (2013.01); F16H 2061/0012 (2013.01); F16H 2061/0015 (2013.01); F16H 2061/0087 (2013.01);
Abstract

The present invention improves fuel efficiency of a vehicle and decreases a noise, by decreasing a margin value of a hydraulic pressure supplied to a hydraulic pressure control target and decreasing the hydraulic pressure supplied to the hydraulic pressure control target, when the vehicle is driven automatically. In a hydraulic pressure control devicefor a vehicle that controls a line pressure or an operation pressure (hydraulic pressure) supplied to a clutchor a transmission(hydraulic pressure control target) provided in the vehicle, the hydraulic pressure control deviceincludes an operation pressure control unit(hydraulic pressure setting device) that sets margin values αand αof the operation pressure (line pressure) supplied to hydraulic circuitsandof the clutchor the transmission, on the basis of a predetermined driving plan (refer to FIG.) in the case of driving the vehicle automatically.

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