CN111717182A - Gas-liquid mixing braking system for truck - Google Patents

Gas-liquid mixing braking system for truck Download PDF

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Publication number
CN111717182A
CN111717182A CN202010709841.5A CN202010709841A CN111717182A CN 111717182 A CN111717182 A CN 111717182A CN 202010709841 A CN202010709841 A CN 202010709841A CN 111717182 A CN111717182 A CN 111717182A
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CN
China
Prior art keywords
brake
oil
valve
pedal assembly
braking system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010709841.5A
Other languages
Chinese (zh)
Inventor
王玉海
许宪志
刘春伟
李金龙
刘学卿
陈志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Jiqingyuan Automobile Technology Development Co ltd
Qingdao Automotive Research Institute Jilin University
Original Assignee
Qingdao Jiqingyuan Automobile Technology Development Co ltd
Qingdao Automotive Research Institute Jilin University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Jiqingyuan Automobile Technology Development Co ltd, Qingdao Automotive Research Institute Jilin University filed Critical Qingdao Jiqingyuan Automobile Technology Development Co ltd
Priority to CN202010709841.5A priority Critical patent/CN111717182A/en
Publication of CN111717182A publication Critical patent/CN111717182A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/58—Combined or convertible systems
    • B60T13/581—Combined or convertible systems both hydraulic and pneumatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T5/00—Vehicle modifications to facilitate cooling of brakes

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

A gas-liquid mixed braking system for a truck comprises a tractor hydraulic oil braking system and a trailer pneumatic braking system. The tractor hydraulic oil braking system comprises a pedal, a brake pedal assembly, a hand brake valve, a hydraulic pump, a high-pressure accumulator, an oil tank and a main brake. The pedal is connected with the brake pedal assembly. The inlet of the hydraulic pump is connected with the oil tank, and the outlet of the hydraulic pump is connected with the high-pressure energy accumulator. The other end of the high-pressure accumulator is connected with the hand brake valve. And the hand brake valve is respectively connected with the brake pedal assembly and the oil tank. The brake pedal assembly is communicated with the oil tank. The brake pedal assembly is provided with a plurality of cut-off electromagnetic valves, and the other ends of the cut-off electromagnetic valves are connected with the main brake. The pneumatic brake system of the trailer comprises a control pipeline, an air supply pipeline, a brake air chamber, an air storage cylinder, a manual valve and a trailer brake. The hand valve is connected with the air reservoir and the trailer brake through pipelines respectively. The invention can meet the braking requirements in driving, parking and retarding states, effectively solves the accidents caused by the brake and has light and convenient operation.

Description

Gas-liquid mixing braking system for truck
Technical Field
The invention belongs to the technical field of brakes, and relates to a gas-liquid mixed braking system for a truck.
Background
A brake device is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member, and is a mechanical part that stops or decelerates a moving member in a machine, and is commonly called a brake or a gate. The conventional braking device of the medium and heavy transport vehicle is in the form of a drum type and a dry type friction plate, and only the functions of vehicle braking and parking braking are realized. When the vehicle runs on a special road surface such as a gentle slope and needs to realize a retarding function, a retarder needs to be installed. In the aspect of braking function, a retarding function is added, the conventional heavy-duty car brake adopts a pneumatic drum type braking unit, continuous or repeated braking is needed on a highway or western highway with height fall, a road section running on a gentle slope or a road section with complex road conditions, the brake generates a large amount of heat, and a vehicle accident of tire burst or burning can be caused in serious cases.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a gas-liquid mixed braking system for a truck, which adopts a wet brake vehicle with service braking/parking braking and speed slowing functions to guide braking heat out of a braking chamber through a heat conduction device for forced cooling when the vehicle runs on a special road surface such as a gentle slope, so that the abrasion of high temperature to the braking system is reduced, the maintenance period of the braking system can be effectively prolonged, the maintenance cost is reduced, the driving force of the brake is driven by a hydraulic system, meanwhile, a pneumatic brake is adopted on a trailer to assist the braking of the vehicle, and the truck is braked and slowed more efficiently and more safely by adopting liquid-gas mixed control.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas-liquid mixed braking system for a truck comprises a tractor hydraulic oil braking system and a trailer pneumatic braking system.
The tractor hydraulic oil braking system comprises a pedal, a brake pedal assembly, a hand brake valve, a hydraulic pump, a high-pressure accumulator, an oil tank and a main brake. The pedal is connected with the brake pedal assembly through a conducting wire.
The inlet of the hydraulic pump is connected with the oil tank through an oil path, and the outlet of the hydraulic pump is connected with the high-pressure energy accumulator through an oil path.
And the other end of the high-pressure energy accumulator is connected with the hand brake valve. And the hand brake valve is respectively connected with the brake pedal assembly and the oil tank through an oil way. The brake pedal assembly is communicated with the oil tank through an oil way.
The brake pedal assembly is connected with a plurality of cut-off electromagnetic valves through oil passages, and the other ends of the cut-off electromagnetic valves are connected with the main brake through the oil passages.
The trailer pneumatic braking system comprises a control pipeline, an air supply pipeline, a brake air chamber, an air storage cylinder, a manual valve and a trailer brake. And the manual valve is respectively connected with the air tank and the trailer brake through pipelines.
Furthermore, an ABS (anti-lock brake system) pressure increasing electromagnetic valve and an ABS pressure reducing electromagnetic valve are arranged on the main brake. And the ABS pressurizing electromagnetic valve and the ABS decompressing electromagnetic valve are respectively connected with the cutting electromagnetic valve through oil ways.
Furthermore, the brake pedal assembly is connected with a plurality of liquid discharge electromagnetic valves through oil paths, and the other ends of the liquid discharge electromagnetic valves are communicated with the main brake through the oil paths.
Furthermore, one end of the air supply pipeline is provided with a second control air connector, and the other end of the air supply pipeline is provided with a plurality of emergency relay valves through pipelines.
Furthermore, one end of the control pipeline is provided with a first control air connector, and the other end of the control pipeline is connected with the emergency relay valve through a pipeline.
Furthermore, the emergency relay valve is respectively connected with the brake air chamber, the air reservoir and the trailer brake through pipelines.
Furthermore, a water drain valve is arranged on the air cylinder.
The invention has the beneficial effects that: the tractor adopts a wet brake form, can meet the braking requirements in running, parking and retarding states, can control the temperature of the braking device due to full supplement of wet braking oil, reduces the abrasion of the braking device, prolongs the service time of a brake part and reduces the maintenance time of a vehicle; the wet brake can provide heat conducting oil for the heat generated by the brake to be conducted to the brake external heat dissipation unit, and vehicle accidents caused by the brake can be effectively solved. The pneumatic braking of the trailer has the advantages of light operation and large braking torque.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic oil braking system of a tractor;
fig. 2 is a schematic structural diagram of a pneumatic braking system of a trailer.
Reference numerals: 1-tractor hydraulic oil brake system, 1-1-pedal, 1-2-brake pedal assembly, 1-3-hand brake valve, 1-4-hydraulic pump, 1-5-high pressure accumulator, 1-6-oil tank, 1-7-cut electromagnetic valve, 1-8-liquid discharge electromagnetic valve, 1-9-ABS pressure increasing electromagnetic valve, 1-10-ABS pressure reducing electromagnetic valve, 1-11-main brake, 2-trailer pneumatic brake system, 2-1-control pipeline, 2-2-air supply pipeline, 2-3-control air connector I, 2-4-brake air chamber, 2-5-emergency relay valve, 2-6-air reservoir, 2-7-water discharge valve, 2-8-manual valve, 2-9-control gas joint two, 2-10-trailer brake.
Detailed Description
For the convenience of understanding, the technical scheme of the invention is further described in detail by embodiments with reference to the attached drawings:
as shown in fig. 1 and 2, an air-liquid hybrid brake system for a truck includes a tractor hydraulic oil brake system 1 and a trailer pneumatic brake system 2.
The hydraulic oil braking system 1 of the tractor comprises pedals 1-1, a brake pedal assembly 1-2, hand brake valves 1-3, hydraulic pumps 1-4, high-pressure accumulators 1-5, oil tanks 1-6 and main brakes 1-11.
The pedal 1-1 is connected with the brake pedal assembly 1-2 through a lead.
The inlet of the hydraulic pump 1-4 is connected with the oil tank 1-6 through an oil path, and the outlet of the hydraulic pump 1-4 is connected with the high-pressure accumulator 1-5 through an oil path.
The other end of the pressure accumulator 1-5 is connected with the hand brake valve 1-3. The hand brake valve 1-3 is respectively connected with the brake pedal assembly 1-2 and the oil tank 1-6 through oil passages.
The brake pedal assembly 1-2 is communicated with the oil tank 1-6 through an oil way.
The brake pedal assembly 1-2 is provided with a plurality of cut-off electromagnetic valves 1-7 through oil passages, and the other ends of the cut-off electromagnetic valves 1-7 are connected with the main brakes 1-11 through the oil passages. The main brake 1-11 is provided with an ABS booster electromagnetic valve 1-9 and an ABS pressure reducing electromagnetic valve 1-10. The ABS pressure-increasing electromagnetic valves 1-9 and the ABS pressure-reducing electromagnetic valves 1-10 are connected with the cutting electromagnetic valves 1-7 through oil paths.
The brake pedal assembly 1-2 is connected with a plurality of liquid discharge electromagnetic valves 1-8 through oil paths, and the other ends of the liquid discharge electromagnetic valves 1-8 are communicated with the main brakes 1-11 through the oil paths.
The trailer pneumatic brake system 2 comprises a control pipeline 2-1, an air supply pipeline 2-2, a brake air chamber 2-4, an air storage cylinder 2-6, a manual valve 2-8 and a trailer brake 2-10.
One end of the air supply pipeline 2-2 is provided with a second control air joint 2-9, and the other end of the air supply pipeline 2-2 is provided with a plurality of emergency relay valves 2-5 through pipelines.
One end of the control pipeline 2-1 is provided with a control gas joint I2-3, and the other end of the control pipeline 2-1 is connected with an emergency relay valve 2-5 through a pipeline.
The emergency relay valve 2-5 is respectively connected with a brake air chamber 2-4, an air storage cylinder 2-6 and a trailer brake 2-10 through pipelines.
The manual valve 2-8 is respectively connected with the gas cylinder 2-6 and the trailer brake 2-10 through pipelines.
The air storage cylinder 2-6 is provided with a water drain valve 2-7.
The tractor has the following working principle:
and (3) the tractor brakes in a running mode, namely the brake pedal 1-1 is stepped, the brake pedal assembly 1-1 gives a signal to the hydraulic pump 1-4 according to the stepping depth, the hydraulic pump 1-4 provides proper pressure, and the piston pressure of the main brake 1-11 is adjusted, so that the purpose of controlling the braking torque is achieved, and the running brake is realized.
And (3) parking brake of the tractor, namely, pressing the parking brake, acting a hand brake valve 1-3, releasing pressure of hydraulic oil of a main brake 1-11, and braking by a brake plate to realize parking brake.
The tractor brakes at a slow speed, when the tractor runs on a landslide road, a slow speed brake switch is pressed, and the main brakes 1-11 can adjust hydraulic pressure according to set speed to brake unit torque so as to achieve slow speed downhill control.
The working principle of the trailer is as follows:
parking and braking the trailer: the tractor supplies air to an air supply pipeline 2-1, supplies air to an air storage cylinder 2-6 through an emergency relay valve 2-5 and stores pressure, and simultaneously supplies air to a parking brake cylinder through a manual valve 2-8. At this time, the air pressure of the air storage cylinders 2-6 is 0bar during parking brake, which is equivalent to a parking brake state, and when the air pressure of the air storage cylinders exceeds 4bar, the parking brake is released.
And (3) trailer service braking, wherein when a brake pedal is stepped on, the tractor supplies air into the control pipeline 2-1, the emergency relay valve 2-5 supplies air from the air storage cylinder 2-6 to the brake air chamber 2-4 of each shaft, the air pressure in the brake air chamber is reduced, the air in the air storage cylinder 2-6 is released after receiving a command, and the trailer starts to brake and enters a braking state.
And (3) trailer brake release: when the brake pedal is stepped on, the control pipeline 2-1 supplies air to the emergency relay valve 2-5, and the emergency relay valve 2-5 controls the air storage cylinder 2-6 to supply air to the brake air chamber 2-4 to generate braking force; when the brake pedal is released, the emergency relay valve 2-5 quickly releases the compressed air of each brake air chamber 2-4, and the braking state is quickly released.
The gas-liquid mixed brake system adopts a brand-new control mode that the pressure relief of hydraulic oil is used for braking and the pressurization is used for releasing the braking, and when the speed can be set on a long slope, the adjustment of the braking torque is carried out through the change of the hydraulic pressure, the constant-speed running is carried out, the traditional automobile brake is replaced on the tractor, meanwhile, the pneumatic brake system is used on the trailer, and the two are combined into a new braking mode.
The above embodiments are merely illustrative or explanatory of the technical solution of the present invention and should not be construed as limiting the technical solution of the present invention, and it is apparent that various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention. The present invention also encompasses these modifications and variations provided they come within the scope of the claims and their equivalents.

Claims (3)

1. A gas-liquid mixed braking system for a truck comprises a tractor hydraulic oil braking system and a trailer pneumatic braking system, wherein the tractor hydraulic oil braking system comprises a pedal, a brake pedal assembly, a hand brake valve, a hydraulic pump, a high-pressure energy accumulator, an oil tank and a main brake;
the pedal is connected with the brake pedal assembly through a conducting wire;
the inlet of the hydraulic pump is connected with the oil tank through an oil way, and the outlet of the hydraulic pump is connected with the high-pressure energy accumulator through an oil way;
the other end of the high-pressure energy accumulator is connected with a hand brake valve, the hand brake valve is respectively connected with a brake pedal assembly and an oil tank through an oil way, and the brake pedal assembly is communicated with the oil tank through the oil way;
the brake pedal assembly is provided with a plurality of cut-off electromagnetic valves through an oil way, and the other ends of the cut-off electromagnetic valves are connected with the main brake through the oil way;
the trailer pneumatic braking system comprises a control pipeline, an air supply pipeline, a braking air chamber, an air storage cylinder, a manual valve and a trailer brake, wherein the manual valve is respectively connected with the air storage cylinder and the trailer brake through pipelines.
2. An air-liquid hybrid brake system for a truck according to claim 1, characterized in that: and the main brake is provided with an ABS (anti-lock brake) pressurizing electromagnetic valve and an ABS depressurizing electromagnetic valve which are respectively connected with the cutting electromagnetic valve through oil ways.
3. An air-liquid hybrid brake system for a truck according to claim 2, characterized in that: the brake pedal assembly is connected with a plurality of liquid discharge electromagnetic valves through oil paths, and the other ends of the liquid discharge electromagnetic valves are communicated with the main brake through the oil paths.
CN202010709841.5A 2020-07-22 2020-07-22 Gas-liquid mixing braking system for truck Pending CN111717182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010709841.5A CN111717182A (en) 2020-07-22 2020-07-22 Gas-liquid mixing braking system for truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010709841.5A CN111717182A (en) 2020-07-22 2020-07-22 Gas-liquid mixing braking system for truck

Publications (1)

Publication Number Publication Date
CN111717182A true CN111717182A (en) 2020-09-29

Family

ID=72573144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010709841.5A Pending CN111717182A (en) 2020-07-22 2020-07-22 Gas-liquid mixing braking system for truck

Country Status (1)

Country Link
CN (1) CN111717182A (en)

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