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Brake control device for vehicle

A brake control and vehicle technology, applied in the direction of brake transmission device, brake action activation device, brake, etc., can solve problems such as interference

Active Publication Date: 2020-01-10
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, in the adjustment of the brake hydraulic pressure, the opening degree of the booster valve is the control object, and it is a control parameter that determines the supply current of the electric motor, so there is a fear of generation of control disturbance (for example, in the patent document In Figure 24, the hydraulic vibration of the power hydraulic source)

Method used

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

Examples

Experimental program
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Embodiment Construction

[0014]

[0015] Embodiments of a brake control device BS for a vehicle according to the present invention will be described with reference to the drawings. In the following description, like "ECU" and the like, components, arithmetic processing, signals, characteristics, and functions having the same value are given the same reference numerals. In addition, among the rotation directions of the electric motor MT and the fluid pump HP, the "forward rotation direction Hf" corresponds to a direction in which the hydraulic pressure Pw of the wheel cylinder WC increases and the braking torque of the wheels WH increases. In addition, in the movement of the brake fluid BF, the "increase pressure direction Hw" is a direction from the reservoir RV to the wheel cylinder WC, and corresponds to the "forward rotation direction Hf".

[0016] Subscripts "i" to "k" added to the end of each symbol are general symbols indicating which wheel they are related to. Specifically, "i" indicates the...

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PUM

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Abstract

The brake control device pumps a brake fluid from a reservoir to each wheel cylinder by means of one fluid pump to increase the fluid pressure, and is provided with: an electric motor which drives thefluid pump; and a controller which controls the electric motor. The controller calculates a target fluid pressure on the basis of at least one among the vehicle wheel speed, the vehicle decelerationstate, and the turning state of the vehicle, calculates a target discharge amount for the fluid pump on the basis of the target fluid pressure, and controls the electric motor on the basis of the target discharge amount. For example, the controller has a front wheel calculation map of the relationship between the fluid pressure and the inflow volume of the brake fluid corresponding to a front wheel cylinder, and a similar rear wheel calculation map corresponding to a rear wheel cylinder, and calculates the target discharge amount on the basis of the front wheel calculation map and the rear wheel calculation map.

Description

technical field [0001] The invention relates to a brake control device for a vehicle. Background technique [0002] In Patent Document 1, it is described that for the purpose of "obtaining a hydraulic brake device without an accumulator without unnecessary energy consumption", "a booster and a depressurizer are provided between the power hydraulic source including the low pressure and high pressure pumps and the wheel cylinders." Each electromagnetic control valve used. During normal braking, the wheel cylinder is cut off from the master cylinder, the pump is operated to obtain the target wheel cylinder hydraulic pressure, and all the electromagnetic control valves for boosting are opened to increase the wheel cylinder hydraulic pressure, or the pump is operated. In the full working state, pressurize through the control of the electromagnetic control valve for boosting. Close the electromagnetic control valve for boosting, and maintain and depressurize through the control of...

Claims

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Application Information

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IPC IPC(8): B60T8/00B60T13/20B60T17/02
CPCB60T13/20B60T2201/03B60T8/172B60T2201/12B60T13/18B60T13/662B60T17/02B60T7/042B60T8/34B60T8/17B60T13/745B60T2220/00B60T2240/00B60T2250/00
Inventor 田中学渡边俊哉
Owner ADVICS CO LTD