VEHICLE BRAKE HYDRAULIC PRESSURE CONTROLLER

Abstract

A vehicle brake hydraulic pressure controller provided with a stroke simulator including a dummy cylinder includes a base member, a plurality of electromagnetic valves, a motor and pumps. The base member is constituted with a flow path in correspondence with a brake system. A plurality of the electromagnetic valves is attached to one face of the base member for controlling a flow of a brake fluid in the flow path. The motor is attached to other face constituting a back face side of the one face of the base member. The pumps are attached to a side face contiguous to the one face of the base member and are driven by the motor for delivering the brake fluid to the flow path. The dummy cylinder and the pumps are aligned at the base member with axis lines in a longitudinal direction being substantially in parallel with each other.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a disassembled perspective view showing a vehicle hydraulic pressure controller according to an embodiment of the invention;

FIG. 2 is a (partially disassembled) sectional view of a brake hydraulic pressure controller;

FIG. 3 is an enlarged perspective view viewing a basic member from a front face side;

FIG. 4 is an enlarged perspective view viewing a base member from a rear face side (partially disassembled perspective view);

FIG. 5 is a perspective view viewing a flow path constituting portion from a front face side;

FIG. 6 is a perspective view viewing the flow path constituting portion from a rear face side;

FIG. 7 is a perspective view viewing the flow path constituting portion from a skewed upper side on the front face side;

FIG. 8 is a perspective viewing the flow path constituting portion from a skewed upper side of the rear face side;

FIG. 9 is an explanatory view showing a flow of a brake fluid;

FIG. 10 is an explanatory view showing the flow of the brake fluid;

FIG. 11 is an explanatory view showing the flow of the brake fluid;

FIG. 12 is an enlarged sectional view showing a low pressure accumulator;

FIG. 13 is a disassembled perspective view showing members of constituting a first accumulator;

FIG. 14 is a disassembled perspective view showing members of constituting a second accumulator;

FIGS. 15A and 15B are sectional views showing a modified example of the low pressure accumulator;

FIGS. 16A and 16B are sectional views showing other example of the low pressure accumulator;

FIG. 17 is sectional views showing other example of the low pressure accumulator;

FIGS. 18A and 18B illustrate sectional views showing other example of the low pressure accumulators;

FIG. 19 is an enlarged sectional view showing a reservoir and a pressurizing member;

FIG. 20 is an enlarged sectional view showing a pump;

FIG. 21 is a brake hydraulic pressure circuit diagram applied to a vehicle brake hydraulic pressure controller according to an embodiment of the invention;

FIG. 22 is a brake hydraulic pressure circuit diagram showing a state of the vehicle brake hydraulic pressure controller in an ignition off state;

FIG. 23 is a brake hydraulic pressure circuit diagram similarly showing states in normal brake control time and in pressure increasing control time in an antilock brake control; and

FIG. 24 is a brake hydraulic pressure circuit diagram similarly showing a state in interlocking brake control time.

Claims

1. A vehicle brake hydraulic pressure controller including a brake system that brakes a wheel brake and a stroke simulator including a dummy cylinder that exerts an operation reaction force in accordance with an operation state of a brake operation element, the vehicle brake hydraulic pressure controller comprising: a base member constituted with a flow path in correspondence with the brake system;a plurality of electromagnetic valves attached to a one face of the base member, the electromagnetic valves controlling a flow of a brake fluid in the flow path;a motor attached to an other face constituting a back face side of the one face of the base member; anda pump attached to a side face contiguous to the one face of the base member, the pump being driven by the motor and delivering the brake fluid to the flow path,wherein the dummy cylinder of the stroke simulator and the pump are aligned at the base member with axis lines thereof in a longitudinal direction being substantially in parallel with each other.

2. The vehicle brake hydraulic pressure controller according to claim 1, including an output hydraulic pressure path communicated to a side of the wheel brake from a master cylinder as the flow path, the vehicle brake hydraulic pressure controller further comprising: a shut-off valve which shuts off the output hydraulic pressure path in an operation state of the pump;a reservoir provided at the flow path, the reservoir storing the brake fluid; anda pressurizing member which applies a pressure to a hydraulic pressure path communicated at least with the wheel brake by a stroke of a pressurizing piston, said stroke being activated by receiving a brake hydraulic pressure that is generated on a side of the master cylinder by operating the brake operation element,wherein the reservoir and the pressurizing member are mounted to the base member from an other face of a front face and a rear face of the base member.

3. The vehicle hydraulic pressure controller according to claim 2, wherein a low pressure accumulator that contains the brake fluid is provided on back face sides of a regulator and the pressurizing member provided at the flow path,wherein the low pressure accumulator is arranged at a lower portion of the base member.

4. The vehicle brake hydraulic pressure controller according to claim 2, wherein the stroke simulator is arranged at an upper position of the motor,the pressurizing member and the reservoir are arranged at a lower position of the motor, andthe base member accommodates the stroke simulator, the pressurizing member and the reservoir and shows a channel-like shape in a side view thereof.

5. The vehicle brake hydraulic pressure controller according to claim 3, wherein the pressurizing piston is provided at inside of a bottomed recess shape housing,wherein the low pressure accumulators are provided on a side of a bottom portion of the pressurizing member and a side of a bottom portion of the reservoir.

6. The vehicle brake hydraulic pressure controller according to claim 3, wherein

7. The vehicle brake hydraulic pressure controller according to claim 6, wherein the diaphragm portion includes a peripheral edge portion brought into close contact with the inner wall portion of the accumulator chamber;wherein the lid member includes a pressing portion that presses the peripheral edge portion of the diaphragm portion toward the inner wall portion of the accumulator chamber to be brought into close contact therewith.

8. The vehicle brake hydraulic pressure controller according to claim 6, wherein the accumulator chamber includes two of the diaphragm portions and two of the lid members, by arranging the two diaphragm portions in an axis line direction of the accumulator chamber centering on the restricting member so as to be spaced apart from each other by an interval therebetween, the two brake fluid chambers are provided on both sides of the restricting member, andwherein the lid members are provided at two of the atmosphere chambers formed at the accumulator chamber by the two diaphragm portions.

9. The vehicle brake hydraulic pressure controller according to claim 8, wherein the restricting member is provided with a communicating hole that enables the brake fluid to flow between the two brake fluid chambers.

10. The vehicle brake hydraulic pressure controller according to claim 6, wherein the diaphragm portion comprises a contact portion that closes the atmosphere communicating hole, the contact portion being made of member different from the diaphragm portion and being integrally molded with the diaphragm portion.

11. The vehicle brake hydraulic pressure controller according to claim 6, wherein the brake system can apply a brake hydraulic pressure to the wheel brake in a state of shutting off the flow path,wherein the brake fluid chamber is provided with a volume capable of storing a brake fluid amount necessary for pressing the wheel brake in a state of shutting off the flow path.