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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 8954249 B1

PDFFull Text
Date of Patent:
Feb. 10, 2015

Filed:

Aug. 30, 2010

Braking force control apparatus for vehicle

Applicants:

Masatoshi Nakatsu, Susono, JP;

Fumito Kurata, Gotenba, JP;

Inventors:

Masatoshi Nakatsu, Susono, JP;

Fumito Kurata, Gotenba, JP;

Assignee:

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Attorney:

Oliff PLC

Primary Examiner:

Helal A Algahaim

Assistant Examiner:

Nga X Nguyen

Int. Cl.
CPC ...
G06F 7/00 (2006.01); B60B 39/00 (2006.01); B60T 8/1763 (2006.01); B60L 3/10 (2006.01); B60L 7/14 (2006.01); B60L 7/26 (2006.01); B60L 11/18 (2006.01); B60T 1/10 (2006.01); B60L 15/20 (2006.01); B60T 8/172 (2006.01); B60W 30/18 (2012.01); B60W 10/08 (2006.01); B60W 10/184 (2012.01);
U.S. Cl.
CPC ...
B60T 8/1763 (2013.01); B60L 3/102 (2013.01); B60L 3/108 (2013.01); B60L 7/14 (2013.01); B60L 7/26 (2013.01); B60L 11/1803 (2013.01); B60T 1/10 (2013.01); B60L 15/2009 (2013.01); B60T 8/172 (2013.01); B60W 30/18127 (2013.01); B60W 10/08 (2013.01); B60W 10/184 (2013.01); B60L 2220/14 (2013.01); B60L 2220/44 (2013.01); B60L 2240/423 (2013.01); B60L 2240/461 (2013.01); B60L 2260/28 (2013.01); B60T 2270/604 (2013.01); Y02T 10/642 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/70 (2013.01); B60T 2210/124 (2013.01); B60W 2540/12 (2013.01); B60W 2550/148 (2013.01); B60W 2720/30 (2013.01); B60Y 2300/89 (2013.01);
Abstract

A braking force control apparatus for a vehicle estimates the friction coefficient μ of a road surface as the state of the road surface on which the vehicle travels, and determines an ideal braking force μW by making use of the estimated road surface friction coefficient μ. When μ is equal to or greater than a predetermined friction coefficient μ, the braking force control apparatus operates an in-wheel motor in a regeneration state to generate a motor braking torque Tmr, and causes a friction brake mechanism to generate a frictional braking force Bf computed by subtracting Tmr from μW. When μ is less than μ, the braking force control apparatus operates the in-wheel motor in a power running state to generate a motor driving torque Tmc, and causes the friction brake mechanism to generate a Bf computed by adding Tmc to μW.

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