Braking control apparatus for vehicle

Abstract

A braking control apparatus for a vehicle includes four wheel braking apparatuses (WC<**>) for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster (VB) generating an assist force for assisting a breaking operation, a first hydraulic circuit (LM, LW<**>), a second hydraulic circuit, a second hydraulic pressure generating apparatus (M, HP#) generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion (BS) for detecting a braking operation variable (Bs) and a pressure regulating portion (LV#), a target value determining portion for determining a first assist hydraulic pressure target value (SP#t) and a second assist hydraulic pressure target value (SP#t) to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started,; and a pressure regulating portion (LV#) for regulating the assist hydraulic pressure to mach the assist hydraulic pressure target value.

Description

Brake control device for vehicles technical field The present invention generally relates to a brake control device for a vehicle. Background technique As is well known, a vacuum type booster generates an assisting force to assist a brake operating force issued by a driver and applied to a master cylinder. By using a pressure lower than atmospheric pressure (hereinafter referred to as "negative pressure"), such as a manifold flow pressure of an internal combustion engine, the driver's braking operation is assisted according to a known vacuum type booster. Such assistance is hereinafter referred to as "vacuum assistance". Furthermore, it is known that a brake hydraulic pressure control device has a hydraulic pump for generating an auxiliary hydraulic pressure superimposed on the hydraulic pressure generated by a master cylinder, and a solenoid valve for regulating and controlling the auxiliary hydraulic pressure. By using the auxiliary hydraulic pressure, the driver's br...

AI Technical Summary

Problems solved by technology

Accordingly, when the pump assist is activated during a braking operation in which only vacuum assist is performed, the driver tends to have an uncomfortable feeling in the braking operation

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