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Brake control apparatus

A braking control and equipment technology, applied in the direction of brakes, braking action starting devices, pump/compressor arrangement, etc., can solve problems such as increasing power consumption

Inactive Publication Date: 2007-12-26
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to the problem of increased power consumption

Method used

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  • Brake control apparatus
  • Brake control apparatus
  • Brake control apparatus

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Embodiment Construction

[0029] Referring now to the drawings, and particularly to FIG. 1 , there is shown a structure of a brake control system of the brake control apparatus of the embodiment. The brake control apparatus of FIG. 1 is exemplified as a brake device of a four-wheel brake-by-wire (BBW) system equipped with a brake device that can be applied independently of the operation (down) of the brake pedal BP by the driver. The first hydraulic unit HU1 and the second hydraulic unit HU2 control or regulate the brake fluid pressure (or brake wheel cylinder pressure). The first and second hydraulic pressure units HU1 - HU2 are driven by corresponding sub electronic control units (sub ECUs) 100 and 200 in response to command signals from a main electronic control unit (main ECU) 300 . The reaction force applied to brake pedal BP is generated by stroke simulator S / Sim connected to master cylinder M / C. The first hydraulic unit HU1 is connected to a first port of the master cylinder M / C via a fluid lin...

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Abstract

In a brake control apparatus with wheel-brake cylinders mounted on respective road wheels, a pump is provided to supply a fluid pressure to each of the wheel-brake cylinders by normal rotation of the pump. A control unit is provided to control rotational motion of the pump to bring an actual wheel-cylinder pressure of each of the wheel-brake cylinders closer to a target wheel-cylinder pressure. Also provided is a pump reverse-rotation suppression device that suppresses reverse rotation of the pump, only when the reverse rotation of the pump is detected.

Description

technical field [0001] The present invention relates to a brake control apparatus that controls braking force by adjusting each individual wheel-cylinder pressure, and more particularly, to a brake control apparatus capable of performing brake-by-wire (BBW) control. Background technique [0002] In recent years, various vehicle braking devices capable of performing brake-by-wire (BBW) control have been proposed and developed. A braking device equipped with such a BBW system is disclosed in Japanese Patent No. 3409721 (hereinafter referred to as "JP3409721"). In the braking device disclosed in JP3409721, the brake pedal is disconnected from each individual brake wheel cylinder, a master cylinder pressure sensor is provided to detect the master cylinder pressure, a stroke simulator is arranged between the brake pedal and the master cylinder, and A travel sensor is provided to detect the descending travel of the brake pedal. The target wheel cylinder pressure is calculated fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/40B60T8/17B60T17/02
CPCB60T8/4063B60T13/20B60T7/042B60T8/4081
Inventor 高桥广治杉山吉隆岩崎克也中田祐树斋田宪宏
Owner HITACHI LTD