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Brake device for vehicle

A braking device, vehicle technology, applied in the direction of brakes, braking components, vehicle components, etc., can solve the problem of inability to detect the failure of the main system, and achieve the effect of suppressing the reduction of braking force

Active Publication Date: 2017-08-25
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, in the invention described in Patent Document 2, although failure of the vacuum booster can be detected, failure of the main system cannot be detected.

Method used

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  • Brake device for vehicle
  • Brake device for vehicle
  • Brake device for vehicle

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Experimental program
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Embodiment Construction

[0020] Embodiments of the present invention will be described below with reference to the drawings. In addition, each drawing is a schematic diagram, and does not prescribe the dimension to a detailed structure.

[0021] (Structure of vehicle brake device)

[0022] figure 1 A schematic configuration diagram of a vehicle brake device according to the present embodiment is shown. The brake device for a vehicle according to the present embodiment includes: a master cylinder 1 having master pistons 113, 114 arranged at a distance B from the input piston 112 in the advancing direction of the input piston 112, And relative to the input piston 112, it slides independently along the axis direction; the reaction force generating device 2, the reaction force generating device 2 makes the reaction force chamber 128 generate the reaction force pressure corresponding to the movement amount of the input piston 112; the switching valve 3, the switching The valve 3 is provided in the open ...

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Abstract

The present invention provides a vehicle braking device capable of detecting a failure of a main system and capable of suppressing a decrease in braking force after detection of the failure. The vehicle brake device of the present invention includes: a failure detection unit (6) that drives the main piston only by the operating force of the brake operating member when the brake operating member is operated, and the operation amount of the brake operating member is a predetermined amount. or when the operating force of the brake operating part is the specified force, and the master cylinder pressure-related value related to the master cylinder pressure is less than the specified value, the failure detection unit detects that the main system fails; and the drive control unit (4, 6 ), in the case of using the failure detection unit to detect the failure of the main system in the operation of the brake operating part, when the operation amount of the brake operating part is greater than the specified amount or the operating force of the brake operating part is greater than the specified force, the use and in the The force corresponding to the servo pressure in the servo chamber generated by the servo pressure generating unit drives the master piston.

Description

technical field [0001] The present invention relates to a vehicle brake device that controls a braking force applied to a vehicle based on a driver's brake operation amount. Background technique [0002] As an example of a vehicle control device that controls the braking force applied to the vehicle based on the driver's brake operation amount, for example, Japanese Patent Application Laid-Open No. 2010-167915 (Patent Document 1), Japanese Patent Laid-Open No. 9-328069, etc. A brake device for a vehicle disclosed in the gazette (Patent Document 2). In these braking devices for vehicles, the input piston and the pressurizing piston are kept apart at a predetermined interval (stroke), and the wheel cylinder is given control based on accumulator and linear valve according to the movement of the input piston. Hydraulic braking force. In such a vehicle brake device, a main system including a master cylinder constituting a pressurizing piston and the like plays an important role...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/18
CPCB60T8/4077B60T13/147B60T17/221B60T13/58
Inventor 坂田康典
Owner ADVICS CO LTD
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