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Brake device for vehicle

A braking device and vehicle technology, applied in the direction of braking transmission device, braking action starting device, automatic starting device, etc.

Active Publication Date: 2022-07-15
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, there is room for improvement in the responsiveness of the brake start determination during a small amount of emergency operation such as stepping on the brake pedal quickly.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Hereinafter, embodiments of the present invention will be described based on the drawings. Each drawing used for description is a conceptual drawing, and the shape of each part may not necessarily be exact. like figure 1 As shown, the vehicle brake device BF includes a master cylinder 1, a reaction force generator 2, a first control valve 22, a second control valve 23, a servo pressure generator 4, an actuator 5, wheel cylinders 541 to 544, and brakes The ECU 6 and various sensors 71 to 76 .

[0013] The master cylinder 1 is a portion that supplies brake fluid to the actuator 5 according to the operation amount of a brake pedal (corresponding to a “brake operating member”) 10 , and includes a master cylinder 11 , a head cylinder 12 , an input piston 13 , and a third cylinder. A main piston 14 and a second main piston 15 . The brake pedal 10 may be any brake operation means that can be operated by the driver.

[0014] The master cylinder 11 is a bottomed, substantial...

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PUM

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Abstract

The present invention is a vehicle braking device provided with a stroke simulator (21), the stroke simulator (21) including a cylinder (211), a piston (212), an orifice (91) formed in an oil passage (164), and a detection A pressure sensor (73) for reaction force pressure, which is the hydraulic pressure of a portion of the oil passage (164) that is closer to the upstream side in the supply direction of the brake fluid supplied to the reaction force chamber 214 than the orifice (91), the vehicle The braking device is provided with: a stroke sensor (71) for detecting a stroke; and a braking start determination unit (62) for detecting the stroke by the stroke sensor (71) when the reaction force pressure detected by the pressure sensor (73) is greater than or equal to a first threshold value ), when the stroke detected is equal to or greater than the second threshold value, it is determined that the operation of the brake operating member (10) has been started.

Description

technical field [0001] The present invention relates to a vehicle braking device. Background technique [0002] As a vehicle braking device, for example, as in Japanese Patent Laid-Open No. 2015-136957, there is a vehicle braking device that determines a braking state and determines whether or not an emergency braking operation is performed. In addition, in the vehicle braking device, in order to appropriately start the brake control separately from the determination of such a braking situation, it is determined whether or not the operation of the brake operating member has been started. In one example, the vehicle braking device determines whether or not the operation of the brake operating member has been started based on a detection value of a stroke sensor that detects the stroke of the brake operating member. Here, when it is determined that "brake start (operation start)", pressurization control to the wheel cylinder is started. [0003] Patent Document 1: Japanese P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/171B60T8/17B60T13/122B60T13/128B60T13/68
CPCB60T8/17B60T8/171B60T13/68B60T8/00B60T8/4081B60T7/042B60T13/146B60T13/662B60T13/686B60T7/22B60T2201/02B60T8/409B60T17/221B60T2270/82B60T2270/88
Inventor 小林达史浅野智孝石田康人远藤亮祐山本贵之
Owner ADVICS CO LTD