CN217598541U - Electric power-assisted hydraulic braking system of light commercial vehicle - Google Patents
Electric power-assisted hydraulic braking system of light commercial vehicle Download PDFInfo
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- CN217598541U CN217598541U CN202221980390.XU CN202221980390U CN217598541U CN 217598541 U CN217598541 U CN 217598541U CN 202221980390 U CN202221980390 U CN 202221980390U CN 217598541 U CN217598541 U CN 217598541U
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Abstract
The utility model provides a light-duty commercial car electricity helping hand hydraulic braking system mainly relates to light-duty commercial car service braking field. Including braking oilcan, brake pedal, front axle electric power assisted master cylinder, rear axle electric power assisted master cylinder, normally closed solenoid valve, controller, ABS solenoid valve, hydraulic pressure pipeline, sensor etc. its characterized in that: in the braking process of a driver, a pedal travel sensor sends a pedal displacement signal to a controller, the controller receives the displacement signal and then drives a front axle/rear axle power-assisted motor to work, a master cylinder outputs high-pressure brake fluid, and the brake fluid is regulated by an ABS electromagnetic valve and then flows into a brake wheel cylinder to generate braking force. The utility model has the advantages that: the scheme of the electric power-assisted hydraulic braking system applicable to the light commercial vehicle is provided, the traditional vacuum power-assisted mode is abandoned, and besides the capability of conventional braking, the intelligent driving functions of active braking, automatic parking, ramp assistance, following cruise, deep energy recovery and the like can be realized.
Description
Technical Field
The utility model relates to a light-duty commercial car electricity helping hand hydraulic braking system belongs to commercial car braking technical field.
Background
At present, with the new energy trend of vehicles and the progress of automatic driving technology, the traditional vacuum power-assisted braking system cannot meet the development requirements of the current automobile industry, and the electronic power-assisted braking system is increasingly applied to passenger vehicles and pickup trucks. Compared with a vacuum power-assisted braking system, the electronic power-assisted braking system does not depend on a vacuum source any more, the braking reaction speed is higher, the braking performance is obviously improved, and intelligent driving functions such as active braking, automatic parking, hill starting, following cruising and deep energy recovery can be integrated. However, due to restrictions of installation space, motor power and the amount of liquid discharged from the master cylinder, the tandem dual-chamber master cylinder type electric power-assisted brake system used by a passenger car is not suitable for commercial car models, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a light-duty commercial car electricity helping hand hydraulic braking system under the prerequisite of guaranteeing braking performance, realizes intelligent driving functions such as initiative braking, automatic parking, ramp starting, cruise with the car, degree of depth energy recuperation.
The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:
an electrically-assisted hydraulic brake system for a light commercial vehicle, comprising: the brake system comprises a front axle brake oil can, a rear axle brake oil can, a front axle electric power-assisted main cylinder, a rear axle electric power-assisted main cylinder, a normally closed electromagnetic valve, a controller, an ABS electromagnetic valve, a wheel brake, a liquid level sensor, a brake pedal stroke sensor and a hydraulic sensor;
an oil inlet of the front axle electric boosting main cylinder is connected with an oil outlet of the front axle braking oil can through a hydraulic pipeline, an oil inlet of the rear axle electric boosting main cylinder is connected with an oil outlet of the rear axle braking oil can through a hydraulic pipeline, and oil outlets of the front axle boosting main cylinder and the rear axle boosting main cylinder are connected with an oil inlet of the ABS solenoid valve through hydraulic pipelines;
the normally closed electromagnetic valve is respectively connected with the front axle electric power-assisted main cylinder and the front axle braking oil can through a hydraulic pipeline;
the wheel side brake comprises a left front brake, a right front brake, a left rear brake and a right rear brake;
an F port of the ABS electromagnetic valve is connected with an oil outlet of a front axle electric power-assisted main cylinder, an R port of the ABS electromagnetic valve is connected with an oil outlet of a rear axle electric power-assisted main cylinder, an FL port of the ABS electromagnetic valve is connected with a left front brake, an FR port of the ABS electromagnetic valve is connected with a right front brake, an RL port of the ABS electromagnetic valve is connected with a left rear brake, and an RR port of the ABS electromagnetic valve is connected with a right rear brake;
the controller is connected to the hydraulic sensor, the normally closed electromagnetic valve, the front axle electric power-assisted main cylinder, the rear axle electric power-assisted main cylinder and the brake pedal stroke sensor through circuits.
Preferably, the front axle electric power-assisted main cylinder (4) is rigidly connected with a brake pedal through a push rod and is connected with a pedal stroke sensor through a circuit.
Preferably, liquid level sensors are arranged on the front axle braking oil can and the rear axle braking oil can.
Preferably, the power assisting motors used by the front axle electric power assisting main cylinder and the rear axle electric power assisting main cylinder use 24V low-voltage electricity.
Preferably, the brake pedal stroke sensor outputs two paths of pedal displacement signals to the controller.
Preferably, the front axle electric power-assisted main cylinder, the rear axle electric power-assisted main cylinder and the controller are connected through an internal CAN, and meanwhile, the controller is connected to a whole vehicle CAN bus.
The utility model has the advantages that: the utility model discloses respectively install a braking oilcan and a single-chamber formula electric power assisted brake master cylinder on front axle brake circuit and rear axle brake circuit, both solved the current problem that the installation space of series connection double-chamber formula electric power assisted brake master cylinder is nervous on commercial car, the fluid-discharge capacity is not enough, realized the mutual independent purpose of front, rear axle brake circuit again, when one of them return circuit became invalid, the other return circuit still can normally work; in addition, the rear axle electric power-assisted main cylinder is not rigidly connected with the brake pedal, the rear axle power-assisted motor is driven to work by the controller completely in the braking process, so that a rear axle loop generates high-pressure brake fluid, and the intelligent driving functions of automatic parking, hill starting, deep braking energy recovery and the like can be realized by matching with proper control logic.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of the connection of the hydraulic pipeline of the present invention.
Fig. 2 is a schematic diagram of the electrical architecture of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Light-duty commercial car electricity helping hand hydraulic braking system, major components and parts include:
front axle braking oilcan, rear axle braking oilcan: storing the low-pressure brake fluid;
a brake pedal: transmitting a driver braking intention;
front axle electric power-assisted main cylinder, rear axle electric power-assisted main cylinder: the single-cavity master cylinder is integrated with the power-assisted motor and respectively provides high-pressure brake fluid for a front axle brake circuit and a rear axle brake circuit; the oil outlet of the power-assisted main cylinder is connected with the oil inlet of the ABS electromagnetic valve;
three-position two-way normally closed solenoid valve: controlling the on-off of a front axle brake loop and a front axle brake oil can;
a controller: receiving a sensor signal, identifying the braking intention of a driver, controlling the working states of a front/rear axle power-assisted motor and a three-position two-way normally closed electromagnetic valve, periodically monitoring whether each part has a fault, and simultaneously sending a message to a finished automobile CAN bus for data exchange with other systems;
ABS solenoid valve: the oil pressure of a brake circuit is regulated to prevent the vehicle from locking; the F port is connected with an oil outlet of a front axle electric power-assisted main cylinder, the R port is connected with an oil outlet of a rear axle electric power-assisted main cylinder, the FL port is connected with a left front axle brake, the FR port is connected with a right front axle brake, the RL port is connected with a left rear axle brake, and the RR port is connected with a right rear axle brake;
a wheel edge brake: converting the brake oil pressure into brake force to decelerate the vehicle;
a hydraulic pipeline: and transmitting and conveying the brake oil.
Liquid level alarm: monitoring the liquid level height in the brake oil can, and sending an alarm signal when the liquid level height is lower than a certain value;
brake pedal stroke sensor: converting the pedal displacement signal into a voltage signal and sending the voltage signal to a controller;
a hydraulic sensor: the brake fluid pressure output by the master cylinder is monitored, and a fluid pressure signal is sent to the controller.
The front axle power-assisted main cylinder, the brake pedal, the front axle oil can and the controller are arranged in the cab, wherein the front axle power-assisted main cylinder is rigidly connected with the brake pedal through a push rod and is integrated with a pedal stroke sensor; the front axle brake circuit and the rear axle brake circuit are not communicated with each other, and when one circuit fails due to leakage and the like, the other circuit can still work normally.
A light-duty commercial car electricity helping hand hydraulic braking system, during normal braking, the driver steps on brake pedal, pedal travel sensor gathers pedal displacement signal and sends for the controller, the controller is according to this signal identification driver braking intention to the moment of torsion that should produce respectively according to preceding rear axle helping hand motor of current vehicle state calculation, through the work of inside CAN communication control preceding rear axle helping hand motor, produce high pressure brake fluid, the brake fluid of preceding rear master cylinder output gets into F mouth and the R mouth of ABS solenoid valve respectively, flows in the brake pipe respectively from FL mouth, FR mouth, RL mouth, RR mouth through the brake pipe after the ABS solenoid valve pressure regulating and flows in the brake wheel cylinder of left front axle, right front axle, left rear axle, right rear axle, produces the brake force, realizes that the vehicle slows down.
A light-duty commercial car electricity helping hand hydraulic braking system, produce high-pressure brake fluid because of rear axle helping hand master cylinder passes through controller drive helping hand motor completely, the utility model discloses use on electric motor car model, cooperate with machine controller, can realize the braking energy recovery control of the degree of depth, the utility model provides one of them control strategy: motor controller with helping hand master cylinder controller carry out information exchange through whole car CAN bus, during the driver braking, if motor energy recuperation's ability is enough, helping hand master cylinder controller CAN realize rear axle braking circuit's 0 build pressure, if motor energy recuperation's ability is not enough, helping hand master cylinder controller drive rear axle helping hand motor realizes rear axle hydraulic pressure system dynamic compensation.
A light-duty commercial car electricity helping hand hydraulic braking system, can realize automatic parking function, the utility model provides one of them control strategy: the power-assisted main cylinder controller receives a vehicle speed signal, an accelerator pedal signal and a brake pedal signal on a vehicle CAN bus, when a vehicle stops and the time that a driver continuously steps on a brake pedal exceeds 3s, the power-assisted main cylinder controller controls a rear axle power-assisted motor to keep torque output, even if the driver releases the brake pedal, a rear axle loop still keeps braking force until the controller receives an accelerator pedal activation signal, the power-assisted motor releases the torque, and the braking force disappears.
A light-duty commercial car electricity helping hand hydraulic braking system, under all spare parts normal operating conditions, the solenoid valve keeps the normally closed state, front axle return circuit and front axle oilcan do not communicate, and front axle helping hand master cylinder became invalid, controller control normally closed solenoid valve opens, front axle return circuit and braking oilcan intercommunication are in the low pressure state all the time, and the driver only receives front axle master cylinder return spring and pedal return spring's effort when stepping on brake pedal this moment, and the pedal can be stepped on to the end easily, and the sensor sends pedal displacement signal and gives the controller simultaneously, the rear axle return circuit can normally work, provides the brake force for the vehicle.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a light-duty commercial car electricity helping hand hydraulic braking system which characterized in that includes: the brake system comprises a front axle brake oil can, a rear axle brake oil can, a front axle electric power-assisted main cylinder, a rear axle electric power-assisted main cylinder, a normally closed electromagnetic valve, a controller, an ABS electromagnetic valve, a wheel brake, a liquid level sensor, a brake pedal stroke sensor and a hydraulic sensor;
the oil inlet of the front axle electric boosting main cylinder is connected with the oil outlet of a front axle braking oil can through a hydraulic pipeline, the oil inlet of the rear axle electric boosting main cylinder is connected with the oil outlet of a rear axle braking oil can through a hydraulic pipeline, and the oil outlets of the front axle electric boosting main cylinder and the rear axle electric boosting main cylinder are connected with the oil inlet of an ABS solenoid valve through a hydraulic pipeline;
the normally closed electromagnetic valve is respectively connected with the front axle electric power-assisted main cylinder and the front axle brake oil can through a hydraulic pipeline;
the wheel side brake comprises a left front brake, a right front brake, a left rear brake and a right rear brake;
an F port of the ABS electromagnetic valve is connected with an oil outlet of a front axle electric power-assisted main cylinder, an R port of the ABS electromagnetic valve is connected with an oil outlet of a rear axle electric power-assisted main cylinder, an FL port of the ABS electromagnetic valve is connected with a left front brake, an FR port of the ABS electromagnetic valve is connected with a right front brake, an RL port of the ABS electromagnetic valve is connected with a left rear brake, and an RR port of the ABS electromagnetic valve is connected with a right rear brake;
the controller is connected to the hydraulic sensor, the normally closed electromagnetic valve, the front axle electric power-assisted main cylinder, the rear axle electric power-assisted main cylinder and the brake pedal stroke sensor through circuits.
2. The light commercial vehicle electric power hydraulic brake system according to claim 1, wherein the front axle electric power master cylinder (4) is rigidly connected to a brake pedal through a push rod and is connected to a pedal stroke sensor through an electric circuit.
3. The light commercial vehicle electrically-assisted hydraulic brake system of claim 1, wherein the front axle brake fluid reservoir and the rear axle brake fluid reservoir have fluid level sensors mounted thereon.
4. The electric power-assisted hydraulic brake system for the light commercial vehicle as claimed in claim 1, wherein the front axle electric power-assisted main cylinder and the rear axle electric power-assisted main cylinder use 24V low voltage electricity for the power-assisted motors.
5. The electric power-assisted hydraulic brake system for the light commercial vehicle as recited in claim 2, wherein the brake pedal stroke sensor outputs two pedal displacement signals to the controller.
6. The electric power-assisted hydraulic braking system of the light commercial vehicle as claimed in claim 1, wherein the front axle electric power-assisted main cylinder, the rear axle electric power-assisted main cylinder and the controller are connected through an internal CAN, and the controller is connected to a CAN bus of the whole vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221980390.XU CN217598541U (en) | 2022-07-29 | 2022-07-29 | Electric power-assisted hydraulic braking system of light commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221980390.XU CN217598541U (en) | 2022-07-29 | 2022-07-29 | Electric power-assisted hydraulic braking system of light commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217598541U true CN217598541U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221980390.XU Active CN217598541U (en) | 2022-07-29 | 2022-07-29 | Electric power-assisted hydraulic braking system of light commercial vehicle |
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| Country | Link |
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| CN (1) | CN217598541U (en) |
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2022
- 2022-07-29 CN CN202221980390.XU patent/CN217598541U/en active Active
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