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Vehicle brake system

A technology of vehicle braking and wheel braking, which is applied in the direction of brakes, vehicle parts, braking transmission devices, etc., and can solve problems such as changes in brake pedals, larger differences in brake pedals, and drivers feeling uncomfortable

Inactive Publication Date: 2013-11-27
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adjusting the controlled hydraulic braking force involves adjusting the operation of the pump that generates the controlled hydraulic pressure for the controlled hydraulic braking force, which causes the brake fluid from the master cylinder to be consumed by the pump, so that the stroke of the brake pedal inevitably changes
When the regenerative braking force increases, the difference in brake pedal travel becomes larger, which may make the driver feel uncomfortable
These problems arise naturally since brake-by-wire is not implemented in the vehicle braking device described in the last-mentioned US Bulletin

Method used

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Experimental program
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no. 1 approach

[0030] A brake-by-wire type vehicle braking system according to a first embodiment of the present invention will be described below with reference to the drawings. see now figure 1 and figure 2 , a vehicle brake system generally designated by reference numeral 10 includes a hydraulic brake device 11 , an ECU 13 for controlling the hydraulic brake device 11 and the like.

[0031]The hydraulic brake device 11 is provided with a left front wheel brake 30fl and a right front wheel brake 30fr for the left front wheel 23fl and a right front wheel 23fr, and a left rear wheel brake 30rl and a right rear wheel brake 30rl for a left rear wheel 23rl and a right rear wheel 23rr. Wheel brakes 30rr. As known in the art, each of these brakes 30fl, 30fr and 30rl, 30rr is a disc brake or drum brake comprising at least one brake cylinder for operating brake shoes to limit the Rotation of the brake disc or drum (neither shown) which rotate with the tires. The configurations of the front whe...

no. 2 approach

[0058] Figure 6 Some components that are characteristic of the vehicle braking system according to the second embodiment of the present invention are shown. The brake system of the second embodiment differs from the brake system of the first embodiment described above in that a fluid absorbing mechanism 153 is used instead of the stroke absorbing mechanism 53 including the spring 54 and suspension members 55a, 55b, and the rubber disc 69 etc. are used to return the reaction force to the brake pedal 20, so that the device adopting the existing structure can be used as the vacuum type booster device 27. Therefore, parts different from those in the first embodiment will be described hereinafter, and parts identical to or identical to those in the first embodiment will be described below. Figure 6 are marked with the same reference numerals and will not be described in detail here.

[0059] Such as Figure 6 As shown, the fluid absorbing mechanism 153 is provided with a sumpe...

no. 3 approach

[0063] Figure 7 A partial circuit is shown as a feature of a vehicle braking system according to a third embodiment of the present invention. The brake system of the third embodiment differs from the brake system of the above-mentioned second embodiment only in that a restricting member 70 for restricting the flow of the fluid absorbed by the fluid absorbing mechanism 153 is added on the inlet side of the fluid absorbing mechanism 153 as a Free parts or blank parts. The restricting member 70 includes a fixed throttle valve 71 and a check valve 72 connected in parallel with the fixed throttle valve 71 for allowing fluid to flow only from the cylinder 57 to the channel 26r.

[0064] In the braking system of the third embodiment, when the driver suddenly performs a braking operation, the restricting member (throttle) 70 restricts the amount of brake fluid flowing into the cylinder 57, which results in restricting the absorption by the fluid absorbing mechanism 153. speed. As ...

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PUM

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Abstract

A vehicle brake system, capable of realizing a brake-by-wire construction which can be installed in vehicles in the same manner as conventional brake systems, is provided with a booster device, a master cylinder, wheel brakes, and a hydraulic pressure control device interposed between the master cylinder and the wheel brakes. The system is further provided with a stroke sensor for detecting the moving stroke of a brake pedal, a simulator for applying to the brake pedal a pseudo reaction force corresponding to the moving stroke of the brake pedal, a play or idling component arranged between the booster device and the hydraulic pressure control device for absorbing the moving stroke of the brake pedal by a predetermined amount, and an electronic control device for controlling the hydraulic pressure control device based on an input from the stroke sensor.

Description

[0001] reference binding [0002] This application is based on Japanese Application No. 2007-080725 filed March 27, 2007 and Japanese Application No. 2008-022420 filed February 1, 2008 and claims priority from said applications under 35 U.S.C. 119, which The entire content of the application is incorporated herein by reference. technical field [0003] The invention relates to a vehicle brake system capable of realizing wire-controlled braking, wherein the brake operating part is connected with the brake operating part through electric signals. Background technique [0004] In the so-called "brake-by-wire system", the brake operating part including the brake pedal, etc. and the brake operating part including the wheel brake, etc. are connected to each other by means of electrical signals, and the brake operating part is mechanically isolated from the brake operating part , therefore, when the braking force varies based on, for example, the antilock brake operation, unpleasa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/74
Inventor 桥田浩一森川裕介内藤政行小久保浩一
Owner ADVICS CO LTD
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