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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 9989148 B1

PDFFull Text
Date of Patent:
Jun. 05, 2018

Filed:

Jun. 07, 2013

Hydraulic control system for vehicles

Applicant:

Toyota Jidosha Kabushiki Kaisha, Aichi, JP;

Inventors:

Yusuke Ogata, Toyota, JP;

Hirofumi Nakada, Toyota, JP;

Assignee:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Atif Chaudry

Int. Cl.
CPC ...
F16H 61/02 (2006.01); F16D 48/02 (2006.01); F16H 61/14 (2006.01); B60K 6/48 (2007.10); F16H 61/00 (2006.01); F16H 61/662 (2006.01);
U.S. Cl.
CPC ...
F16H 61/0267 (2013.01); B60K 6/48 (2013.01); F16D 25/14 (2013.01); F16H 61/0021 (2013.01); F16H 61/0031 (2013.01); F16H 61/143 (2013.01); F16H 61/0276 (2013.01); F16H 61/66272 (2013.01); Y10T 137/8601 (2015.04); Y10T 137/86019 (2015.04); Y10T 137/86027 (2015.04); Y10T 137/86163 (2015.04);
Abstract

A hydraulic control system for vehicles is provided. A switching valve () that is adapted to provide a communication between an electric oil pump () and a drain passage while inhibiting a delivery of the oil from the electric oil pump () to the control object (, C) when an output pressure of the mechanical oil pump () is higher than a predetermined level, and to provide a communication between the electric oil pump () and the control object (, C) through a predetermined oil passage when an output pressure of the mechanical oil pump () is lower than the predetermined level. The electric oil pump () discharges oil before establishing the communication between the electric oil pump () and the control object (, C) as a result of reduction in the output pressure of the mechanical oil pump () to be lower than the predetermined level.

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