CN214450895U - Drive-by-wire braking system for automobile brake - Google Patents

Abstract

The utility model discloses a brake-by-wire system for automobile brake, including the brake-by-wire assembly, the integrated footboard input module that has on the brake-by-wire assembly, the oilcan, footboard simulator assembly, servo cylinder assembly, a motor and the main control unit for driving servo cylinder assembly, be provided with out the liquid hole on the brake-by-wire assembly, the integrated solenoid valve assembly that is used for switching the pressure oil of servo cylinder assembly output or the pressure oil of footboard input module output from going out the liquid hole output that is provided with in the brake-by-wire assembly, the liquid hole of brake-by-wire assembly is linked together through pipeline and anti-lock system or automobile body stable system, anti-lock system or automobile body stable system link to each other with wheel calliper. The utility model discloses simple structure not only helps promoting car brake performance, can make ABS product and ESP product and production line continue to utilize moreover, through the energy recuperation function on the brake-by-wire product simultaneously, has prolonged the continuation of the journey mileage of mixing motor car and electricelectric motor car indirectly.

Description

Drive-by-wire braking system for automobile brake

Technical Field

The utility model relates to an automobile brake system field specifically is a brake-by-wire system for automobile brake.

Background

The braking system is one of the indispensable modules of the vehicle. Because the traditional vacuum booster product has the defects of large volume, heavy mass, complex assembly, easy leakage of a vacuum source, poor boosting performance in a high-altitude area, incapability of realizing energy recovery on hybrid and electric vehicles and the like, the technical scheme and the product of the wire control product are produced in recent years based on the defects and market demands. The line control mobile product has the following advantages relative to the vacuum booster: the integrated level is high, small, the quality is light, the product property does not change obviously with external environment atmospheric pressure, temperature, etc., can be suitable for traditional fuel vehicle, mix motor car, pure electric vehicle, possess energy recuperation function, backup advantages such as braking.

Based on the current market, anti-lock braking system products (ABS) and vehicle body stability system products (ESP) widely exist, and the use of the current brake-by-wire system product with a built-in vehicle body stability system (ESP) can cause that the existing ABS or vehicle body stability system products (ESP) cannot be utilized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drive-by-wire braking system for automobile brake, simple structure not only helps promoting car brake performance, can make ABS product and ESP product and production line continue to utilize moreover, through the energy recuperation function on the drive-by-wire braking product, has prolonged the continuation of the journey mileage of mixing motor car and electricelectric motor car indirectly simultaneously.

In order to achieve the above object, the utility model provides a following technical scheme: the brake-by-wire system for automobile braking comprises a brake-by-wire assembly, wherein a pedal input assembly, an oil can, a pedal simulator assembly, a servo cylinder assembly, a motor for driving the servo cylinder assembly and a main control unit are integrated on the brake-by-wire assembly, a liquid outlet hole is formed in the brake-by-wire assembly, an electromagnetic valve assembly for switching pressure oil output by the servo cylinder assembly or pressure oil output by the pedal input assembly is integrally arranged in the brake-by-wire assembly, the liquid outlet hole of the brake-by-wire assembly is communicated with an anti-lock system or an automobile body stabilizing system through a pipeline, and the anti-lock system or the automobile body stabilizing system is connected with wheel calipers.

Preferably, the oil pot is communicated with a remote oil pot through an oil pipe.

Preferably, the electromagnetic valve assembly comprises a first normally-closed valve and a second normally-closed valve which are respectively connected between the two liquid outlet holes and the servo cylinder assembly, a first normally-opened valve and a second normally-opened valve which are respectively connected between the two liquid outlet holes and the pedal input assembly, a third normally-closed valve which is connected between the pedal input assembly and the pedal simulator assembly, and a fourth normally-closed valve which is connected between the oil can and the servo cylinder assembly.

Preferably, the oil pot and the two liquid outlet holes are provided with one-way valves on the pipelines, and the oil inlet end of each one-way valve is provided with a filter screen.

Preferably, a pedal stroke sensor is mounted on the pedal input assembly.

Preferably, pressure sensors are arranged at the pressure oil output ends of the pedal input component and the servo cylinder assembly.

Preferably, the motor is provided with a motor angle sensor and a motor temperature sensor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. based on the existing market, anti-lock braking system products (ABS) and vehicle body stabilizing system products (ESP) widely exist, therefore, the design scheme of the application realizes the related functions of the ABS or the ESP by reserving a liquid outlet on the brake-by-wire assembly, and the liquid outlet is connected with a liquid inlet of the ABS products or the ESP products, so that the anti-lock braking system products (ABS), the vehicle body stabilizing system products (ESP) and a production line can be effectively utilized within a certain time, and the ABS or ESC products cannot be utilized due to the release of the brake-by-wire products for automobile braking integrated with the ESP functional products;

2. meanwhile, the endurance mileage of the hybrid electric vehicle and the pure electric vehicle is indirectly prolonged through the energy recovery function on the brake-by-wire assembly, and in addition, the brake-by-wire system can be matched with pedal feeling demand curves of different automobile manufacturers, the integration level is high, and the appearance size of the whole product is kept unchanged;

3. the remote oil can is arranged and connected with the oil can through an oil pipe, so that the problem of narrow installation space is effectively solved;

4. the brake system has a backup brake mode, namely, the servo cylinder cannot build pressure according to a preset target under the conditions of motor failure, damage of a piston sealing ring of the servo cylinder and the like, and a driver steps on a brake pedal to push a first cavity and a second cavity of a brake master cylinder of a pedal input assembly to move so as to output brake fluid of the first cavity and the second cavity with pressure to an ABS (anti-lock brake system) or ESP (electronic stability program) interface to realize braking.

Drawings

Fig. 1 is a system connection structure diagram of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1, the utility model provides a brake-by-wire system for automobile brake can be used to traditional fuel car, mixed motor car and pure electric vehicle and include the line control and move assembly 1, brake-by-wire assembly 1 on the integration have footboard input module 102, oilcan 101, footboard simulator assembly 103, servo cylinder assembly 108, be used for driving motor 104 and the main control unit of servo cylinder assembly 108, above-mentioned these parts are the part that the current brake helping hand system of car was used commonly, this side of its specific structure does not just do and has repeated.

The brake-by-wire assembly 1 is provided with a liquid outlet hole, brake liquid for braking can be discharged from the liquid outlet hole, an electromagnetic valve component for switching pressure oil output by the servo cylinder assembly 108 or pressure oil output by the pedal input component 102 is integrated in the brake-by-wire assembly 1 and outputting from the liquid outlet hole, the scheme of the patent has a backup braking mode due to the switching, the liquid outlet hole of the brake-by-wire assembly 1 is communicated with the anti-lock system 2 or the vehicle body stabilizing system 3 through a pipeline, and the anti-lock system 2 or the vehicle body stabilizing system 3 is connected with the wheels 115, so that the corresponding functions of the anti-lock system 2 or the vehicle body stabilizing system 3 are reserved, and various advantages of the brake-by-wire assembly can also be applied.

Specifically, the anti-lock system 2 or the vehicle body stabilizing system 3 is connected with the liquid outlet hole through a metal pipe with a hollow inner part, the head characteristics of the metal pipe are required to be matched with the characteristics of the liquid outlet hole and the input hole of the anti-lock system 2 or the vehicle body stabilizing system 3, the metal pipe is tightly attached to a product interface through a locking nut, and therefore fixing and sealing effects are achieved, and connection is firm.

Wherein, oilcan 101 be linked together through oil pipe and long-range oilcan, long-range oilcan can install in other positions of vehicle, give oilcan 101 fuel feeding through oil pipe, can guarantee the oil consumption of drive-by-wire brake assembly 1, effectively solve the narrow and small problem of installation space, adopt the rubber tube between oilcan 101 and the long-range oilcan particularly, insert long-range oilcan and oilcan 101 kneck with hollow rubber tube to through the clamp chucking, guarantee that the junction does not reveal.

The electromagnetic valve assembly comprises a first normally-closed valve 107-1 and a second normally-closed valve 107-2 which are respectively connected between the two liquid outlet holes and the servo cylinder assembly 108, a first normally-opened valve 106-1 and a second normally-opened valve 106-2 which are respectively connected between the two liquid outlet holes and the pedal input assembly 102, a third normally-closed valve 107-3 which is connected between the pedal input assembly 102 and the pedal simulator assembly 103, and a fourth normally-closed valve 107-4 which is connected with the oilcan 101 and the servo cylinder assembly 108.

Simultaneously, oilcan 101 and two all install check valve 112 on going out the pipeline between the liquid hole, the oil feed end of check valve 112 install filter screen 113.

As various matched sensors, a pedal stroke sensor 111 is mounted on the pedal input assembly 102; pressure sensors 109 are respectively arranged at the pressure oil output ends of the pedal input component 102 and the servo cylinder assembly 108; the motor 104 is provided with a motor angle sensor 110 and a motor temperature sensor 114.

As shown in fig. 1, when the brake-by-wire assembly 1 is in the normal braking mode, during the process that a vehicle driver depresses a brake pedal, a pedal displacement sensor 111 obtains a moving signal of a primary piston of a brake master cylinder in a pedal input assembly 102, and transmits the moving signal to an electronic control unit, the electronic control unit analyzes the moving signal and controls the action of a motor 104, the motor 104 internally includes a mechanism pair for converting the rotary motion of a rotor into a linear motion, the mechanism pair includes a piston with a sealing ring, the piston pushes brake fluid in a cavity inside a servo cylinder assembly 108 to generate a certain pressure, at this time, a first normally-open valve 106-1 and a second normally-open valve 106-2 are in a power-on closed state, a first normally-closed valve 107-1, a second normally-closed valve 107-2 and a third normally-closed valve 107-3 are in a power-on open state, and a fourth normally-closed valve 107-4 is not powered, i.e. in a closed state, the brake fluid with a certain pressure inside the slave cylinder unit 108 enters the anti-lock system 2 or the body stabilization system 3 and finally enters the wheel caliper 115. Meanwhile, the brake fluid discharged from the first cavity of the master cylinder of the pedal input module 102 enters the pedal simulator assembly 103 to provide the driver with a brake pedal feeling, and the real braking force is derived from the pressure generated by the action of the motor 104 and the brake fluid in the servo cylinder assembly 108.

The pedal simulator assembly 103 contains a damping mechanism therein, and the damping mechanism is not limited to a spring, a disc spring, rubber, etc., or a combination thereof.

As a backup braking mode, when the electronic control unit finds that the power assistance of the motor 104 is failed through judgment, at this time, the first normally-closed valve 107-1, the second normally-closed valve 107-2 and the third normally-closed valve 107-3 are in a power-off state, namely, a closed state, and the first normally-opened valve 106-1 and the second normally-opened valve 106-2 are also in a power-off state, namely, an opened state, and brake fluid with pressure in one cavity and two cavities of the master cylinder in the pedal input assembly 102 enters the anti-lock braking system 2 or the vehicle body stabilizing system 3 and finally enters the wheel caliper 115.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. A brake-by-wire system for automobile braking comprises a brake-by-wire assembly (1) and is characterized in that a pedal input assembly (102), an oil can (101), a pedal simulator assembly (103), a servo cylinder assembly (108), a motor (104) for driving the servo cylinder assembly (108) and a main control unit are integrated on the brake-by-wire assembly (1), liquid outlet holes are formed in the brake-by-wire assembly (1), an electromagnetic valve assembly for switching pressure oil output by the servo cylinder assembly (108) or pressure oil output by the pedal input assembly (102) to be output from the liquid outlet holes is integrated in the brake-by-wire assembly (1), the liquid outlet holes of the brake-by-wire assembly (1) are communicated with an anti-lock system (2) or an automobile body stabilizing system (3) through pipelines, the anti-lock system (2) or the automobile body stabilizing system (3) is connected with wheel calipers (115), the electromagnetic valve assembly comprises a first normally-closed valve (107-1) and a second normally-closed valve (107-2) which are respectively connected between two liquid outlet holes and a servo cylinder assembly (108), a first normally-opened valve (106-1) and a second normally-opened valve (106-2) which are respectively connected between the two liquid outlet holes and a pedal input assembly (102), a third normally-closed valve (107-3) which is connected between the pedal input assembly (102) and a pedal simulator assembly (103), and a fourth normally-closed valve (107-4) which is connected with an oil can (101) and the servo cylinder assembly (108).

2. The brake-by-wire system for automobile brakes according to claim 1, characterized in that: the oil pot (101) is communicated with a remote oil pot through an oil pipe.

3. The brake-by-wire system for automobile brakes according to claim 1, characterized in that: oilcan (101) and two pipeline of going out between the liquid hole on all install check valve (112), the oil feed end of check valve (112) install filter screen (113).

4. The brake-by-wire system for automobile brakes according to any one of claims 1 to 3, characterized in that: the pedal input assembly (102) is provided with a pedal stroke sensor (111).

5. The brake-by-wire system for automobile brakes according to claim 4, characterized in that: and pressure sensors (109) are respectively arranged at the pressure oil output ends of the pedal input assembly (102) and the servo cylinder assembly (108).

6. The brake-by-wire system for automobile brakes according to claim 5, characterized in that: the motor (104) is provided with a motor angle sensor (110) and a motor temperature sensor (114).

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