brake hydraulic control unit

Abstract

The object of the present invention is to provide a brake hydraulic pressure control device. In the hydraulic pressure control device for automobile brakes, it is possible to improve the pressurization responsiveness in the process of automatic braking, even in the situation where the pipeline resistance of the suction path is relatively large. There will be no delay in braking when used in low temperature or low temperature environment. When the control solenoid valve, boost solenoid valve, decompression solenoid valve, and pump driven by the motor are housed in the same housing, and based on instructions from the electronic control unit, the pump executes pumping the brake fluid supplied from the main reservoir Or the brake fluid discharged from the wheel brake cylinder, and return the brake fluid to the brake hydraulic pressure control device of the automatic brake control of the main flow from the main hydraulic cylinder to the wheel brake cylinder, which will be connected with the decompression path A liquid storage part communicating with both suction ports is provided inside the housing, and the liquid storage part is arranged at a position where the brake fluid in the liquid storage part flows toward the pump suction port due to gravity.

Description

technical field [0001] The present invention relates to brake hydraulic control devices with automatic braking functions represented by ESC (anti-skid control) and TCS (traction control). It is a brake hydraulic pressure control device that can improve the responsiveness of automatic braking even when the pipe resistance of the inlet suction path increases. Background technique [0002] In recent years, brake fluid pressure control devices for vehicles have become mainstream not only for ABS (anti-lock brake control) but also for automatic braking. Such a brake fluid pressure control device is disclosed in, for example, Patent Document 1 below. [0003] Figure 8 An example of a circuit configuration of a hydraulic brake device capable of performing automatic braking is shown in . Figure 8 The MC is a master hydraulic cylinder linked to the master reservoir MR that stores brake fluid under atmospheric pressure. During the so-called service braking process, the master hydra...

AI Technical Summary

Problems solved by technology

[0014] Therefore, especially in a low-temperature environment where the viscosity of the brake fluid (oil) increases, a rapid increase in the pump discharge pressure cannot be expected, and there is a problem that the pressurization response during automatic braking is insufficient.

Furthermore, this problem occurs even with a short length of the suction path in the case of low ambient temperatures and a significant increase in the viscosity of the brake fluid

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