Title:
HYDRAULIC BRAKE DEVICE
Document Type and Number:
Japanese Patent JP2018199412
Kind Code:
A
Abstract:
To provide a hydraulic brake device which can be downsized and simplified.SOLUTION: A hydraulic brake device 32' comprises: a master fluid passage 50 which is connected from a master cylinder 42 to a wheel brake 46 and is provided with a master shut-off valve 56; a return fluid passage 72 which is provided with a return passage opening valve 66 and is used for allowing working fluid supplied to the wheel brake to return to a reservoir 48 without passing through the master cylinder; and a controlled fluid pressure supply device 74 which supplies the working fluid from a high-pressure source to the wheel brake while adjusting and reducing a pressure of the working fluid by an electromagnetic control valve 64 provided in the return fluid passage. In the hydraulic brake device, there is provided a stroke simulator 54' in which a first fluid chamber 54c and a second fluid chamber 54j are formed while being defined by a piston. The first fluid chamber is connected to the master fluid passage, and the second fluid chamber is connected to the return fluid passage. It is not necessary to employ an opening/closing valve between the master fluid passage and the stroke simulator, so that the hydraulic brake device can be downsized and simplified.SELECTED DRAWING: Figure 6
Inventors:
TAKAHASHI YU
Application Number:
JP2017104935A
Publication Date:
December 20, 2018
Filing Date:
May 26, 2017
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B60T13/122; B60T8/17; B60T8/36; B60T11/16; B60T11/20; B60T13/68; B60T17/22
Attorney, Agent or Firm:
Chubu International Patent Office