ELECTRICALLY OPERATED BRAKE

Title:

ELECTRICALLY OPERATED BRAKE

Document Type and Number:

WIPO Patent Application WO/2005/124182

Kind Code:

A1

Abstract:

An electrically operated brake device where braking force differences between electrically operated brakes are reduced to prevent unstable vehicle traveling during braking. Motors (13) of electrically operated brakes are returned to standard positions during the stop of a vehicle, and then a motor (13) of each of the brakes is driven for a certain predetermined amount, pressing a brake pad (17) against a disk rotor (18) to produce a braking force. An electric current value of each motor (13) in the above operation is measured and differences between the values are calculated. Electric current of each motor is increased or decreased so that there is no current difference between the motors (13). Based on a drive amount of each motor in this operation, standard positions of the motors are determined and renewed. Repeating the above operations reduces braking force differences between the brakes.

Inventors:

KAWAHARA YOSHINARI (JP)
OHNO KOUSAKU (JP)
YOKOYAMA ATSUSHI (JP)
SASAKI MITSUHIDE (JP)

Application Number:

PCT/JP2004/009058

Publication Date:

December 29, 2005

Filing Date:

June 21, 2004

Export Citation:

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Assignee:

HITACHI LTD (JP)
KAWAHARA YOSHINARI (JP)
OHNO KOUSAKU (JP)
YOKOYAMA ATSUSHI (JP)
SASAKI MITSUHIDE (JP)

International Classes:

B60T8/00; B60T8/24; B60T13/74; F16D55/224; F16D65/18; F16D66/00; (IPC1-7): F16D65/18; F16D55/224; F16D66/00

Domestic Patent References:

WO2002026539A2

2002-04-04

Foreign References:

JP2002067932A	2002-03-08
JP2002081475A	2002-03-22
JP2003106355A	2003-04-09
JP2000110865A	2000-04-18
JP2002067932A	2002-03-08

Other References: