CN111572520A - Single-channel air pressure adjusting device of electric control braking system - Google Patents
Single-channel air pressure adjusting device of electric control braking system Download PDFInfo
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- CN111572520A CN111572520A CN202010534256.6A CN202010534256A CN111572520A CN 111572520 A CN111572520 A CN 111572520A CN 202010534256 A CN202010534256 A CN 202010534256A CN 111572520 A CN111572520 A CN 111572520A
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- valve
- air pressure
- electric control
- piston
- air
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- 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
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- 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
- B60T13/24—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 the fluid being gaseous
- B60T13/26—Compressed-air systems
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- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
Abstract
A single-channel air pressure adjusting device of an electric control brake system comprises an air control part and an electric control part, wherein the device comprises a valve body, a pilot cover, a piston, a valve clack and a silencer, the electric control part comprises an electromagnetic coil assembly, the electric control part is positioned in a circuit board cover assembly, the electromagnetic coil assembly comprises a pressure-preparing electromagnetic valve, an exhaust electromagnetic valve and an air inlet electromagnetic valve, and the electromagnetic valves are arranged side by side and are fixed on a mounting plate together with a pressure sensor; braking is implemented through electric control and pneumatic control; the electric control refers to that the single-channel air pressure adjusting device of the electric control brake system receives an electric signal fed back by an external power supply, converts the electric signal into air pressure through an electromagnetic coil assembly, and transmits the air pressure to each chamber to implement braking; the air control means that an external air source directly enters the device through a control port to brake an output port; the pneumatic control part has the advantages of simplifying the structural design of the pneumatic control part, facilitating the installation, increasing the sealing property and improving the stability and safety in vehicle braking.
Description
Technical Field
The invention relates to the technical field of vehicle brake components, in particular to a single-channel air pressure adjusting device of an electric control brake system.
Background
With the development of the automobile industry, the EBS system is more and more widely used. The EBS is an electronic control system that is used to control the braking system in place of the conventional mechanical transmission. The active safety device has the advantages of short brake response time, shorter brake distance compared with ABS (anti-lock brake system), and capability of covering all functions of the ABS. The air pressure adjusting device is developed to accommodate an electronically controlled brake system EBS, and generally includes an electronic control section and a relay valve section. The EBS system has the advantages of preventing wheels from locking, shortening the braking distance of the automobile, reducing the abrasion of tires, preventing the automobile from deviating and drifting and the like, and plays a role based on an ABS. In the event of a wheel approaching lock, the corresponding wheel brake pressure will be released and will remain constant during the requested or measured wheel re-acceleration, after which the brake pressure is gradually increased. The intelligent electronic control inching brake is equivalent to the intelligent electronic control inching brake for each wheel.
In the electric control relay valve assembly in the prior art, components such as an electromagnetic coil component and a pressure sensor of an electric control part are generally required to be separately installed, the design is complex, the occupied space is large, and the assembly and disassembly are complicated. And the valve of the relay valve part generally adopts face seal, and the performance of the traditional sealing mode is unstable, the sealing element is easy to leak air, and the sealing performance is greatly reduced after abrasion occurs.
For example, the application No. (201520508491.0) discloses an EBS single-channel electrically-controlled bridge control valve assembly, which includes a valve body, a solenoid coil assembly and a pressure sensor, wherein the valve body has a main air inlet, at least two air outlets and an air outlet, the main air inlet is connected to a vehicle air reservoir, the two air outlets are respectively connected to each brake air chamber of a vehicle, an air chamber is disposed in the valve body and is communicated with the main air inlet, the air outlets and the air outlet, a piston is disposed in the air chamber and divides the air chamber into an upper chamber and a lower chamber, the movement of the piston along the vertical direction is controlled by the solenoid coil assembly connected to the valve body, a valve is disposed in the lower chamber and is capable of controlling whether the main air inlet is communicated with the air. Although the design of the relay valve is simplified to a certain extent, the design of an electric control part is not improved, the problem that the design is complicated and the assembly and disassembly are inconvenient still exists, and meanwhile, the sealing performance of the valve sealing assembly is unstable.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a single-channel air pressure adjusting device of an electric control brake system, wherein the device comprises an air control part and an electric control part, the air control part comprises a valve body, a pilot cover, a piston, a valve clack and a silencer, the electric control part comprises an electromagnetic coil assembly, the electric control part is positioned in a circuit board cover assembly, the electromagnetic coil assembly comprises a pressure-preparing electromagnetic valve, an exhaust electromagnetic valve and an air inlet electromagnetic valve, and the electromagnetic valves are arranged side by side and are fixed on a mounting plate together with a pressure sensor. Set up the circuit board gland in the circuit board lid subassembly, the circuit board gland is connected through little buckle and circuit board, plays the effect that the protection circuit board avoided its short circuit.
In order to achieve the purpose, the invention adopts the technical scheme that: a single-channel air pressure adjusting device of an electric control brake system comprises an air control part and an electric control part, wherein the air control part comprises a valve body, a pilot cover, a piston, a valve clack and a silencer; the electric control part comprises an electromagnetic coil assembly, and is positioned in the circuit board cover assembly; the electromagnetic coil assembly comprises a pressure preparation electromagnetic valve, an exhaust electromagnetic valve and an air inlet electromagnetic valve, and the electromagnetic valves are arranged side by side and fixed on the mounting plate together with the pressure sensor;
the mounting plate is fixedly connected with the valve body through an inner third mounting screw;
the left end of the valve body of the pneumatic control part is provided with a first air inlet and a first output port, and the right end of the valve body is provided with a second air inlet and a second output port;
the outer parts of the first air inlet and the second air inlet are connected with an air source, and filter screens are arranged in the first air inlet and the second air inlet and used for filtering air;
a pilot cover upper cavity is formed between the pilot cover and the upper part of the piston and is communicated with the control port;
the piston is provided with a balance hole, so that the air pressures of the upper cavity and the lower cavity of the piston can be mutually supplemented, the air pressure of the piston is quickly balanced, and the purpose of stably outputting the air pressure of an output port is achieved;
the lower part of the piston is provided with a framework gasket assembly, and the framework gasket assembly is provided with an exhaust hole to balance the air pressure of the upper cavity and the lower cavity of the piston so as to ensure that the piston is stably balanced.
The lower part of the piston is provided with a valve clack, the upper end surface of the valve clack is contacted with the valve seat, and a valve clack return spring is arranged in the piston and is arranged in the guide sleeve.
The inside of the circumference of the valve clack is provided with a linear sealing lip which is movably sealed with the outside of the circumference of the guide sleeve.
A Y-shaped ring structure is arranged at the contact position of the framework gasket assembly and the piston, and the Y-shaped ring structure stabilizes the motion of the piston.
The linear sealing lipMouth pieceThe interior of the shell is provided with a plurality of layers of concave-convex grooves, including V-shaped concave-convex grooves or arc-shaped concave-convex grooves; and lubricating oil is arranged in the concave-convex groove and used for reducing the motion resistance of the valve clack and the guide sleeve.
The lower part of the valve body is provided with a silencer base and a silencer, and the silencer is fastened on the lower part of the lower valve body through a lock catch, so that the valve body is convenient to disassemble and assemble.
The electromagnetic coil assembly comprises a pressure sensor, and the electromagnetic coil assembly, the pressure sensor and the program control board are connected through an electromagnetic valve connector, so that the electromagnetic coil assembly is convenient to disassemble and maintain.
The circuit board cover assembly is connected with the ECU through a wire harness, and the whole air pressure adjusting device is communicated with the ECU through the circuit board cover assembly through a cable.
The air inlet electromagnetic valve is communicated with the air inlet, and the pressure sensor is communicated with the output port.
The exhaust electromagnetic valve, the first output port and the second output port are communicated with the silencer.
The standby pressure electromagnetic valve is communicated with the control port.
The valve seat is fixed on the valve body by an inner diameter retainer ring, the valve clack is arranged below the valve seat, the end face of the valve clack is contacted with the valve seat, a valve clack return spring is arranged between the valve clack and the guide sleeve, and the valve clack return spring is arranged in the guide sleeve.
The inner circumference of the valve clack is provided with a sealing lip which is movably sealed with the guide sleeve.
The sealing lip is a linear sealing lip, and a plurality of layers of concave-convex grooves are arranged in the sealing lip and comprise V-shaped concave-convex grooves or arc-shaped concave-convex grooves; and lubricating oil is arranged in the concave-convex groove and used for reducing the motion resistance of the valve clack and the guide sleeve.
And the program control board is connected with the circuit board cover assembly by adopting a fourth mounting screw.
And the valve body and the circuit board cover assembly are fixed through a second mounting screw.
The circuit board cover assembly comprises a contact pin, a contact pin hole E1 is formed in the middle of the contact pin, the periphery of the contact pin hole is matched with a circuit board, pressing tight fit is adopted at a small hole of the circuit board, and disassembly and maintenance are convenient. When the contact pin is matched with the circuit board hole in a matched mode, the size of the contact pin hole can be changed according to the interference force of the contact pin and the circuit board hole, the contact pin and the circuit board hole are guaranteed not to be installed due to the fact that the interference size is too large, the contact pin and the circuit board hole are finally determined to be matched safely and reliably, and the electromagnetic coil assembly and the transmission of the electrical signals of the contact pin are guaranteed.
The function of the electronic control unit ECU of the EBS is to perform operations, processing and judgment on information input by the sensor according to programs and data stored in the ECU, and then to output commands and provide certain control information to each component of the EBS.
The exhaust part at the lower part of the valve body is provided with a silencing base, a silencer and a silencing belt; the silencing base adopts a porous structure design and is used for filtering the first exhaust; the silencing band is used for second exhaust filtration and is made of an environment-friendly porous structure which is overlapped layer by layer. The adoption of the two filtering structures ensures that the exhaust noise can be in an acceptable range after the air pressure of the brake chamber is exhausted into the atmosphere through the exhaust port. Thereby meeting the environmental protection requirement.
The invention provides an automobile, and a single-channel air pressure adjusting device of an electric control braking system comprises any one of the single-channel air pressure adjusting devices of the electric control braking system.
The electromagnetic coil assembly and the pressure sensor are integrated into a whole and are arranged outside the pneumatic control part, so that the structural design of the pneumatic control part is simplified, and meanwhile, parts of the electric control part are integrated on the circuit board cover, so that the electromagnetic coil assembly is convenient to mount, saves the mounting space and is convenient to dismount. In addition, the sealing lip of the valve clack improves the traditional surface sealing into linear lip sealing, thereby greatly increasing the sealing performance of the product and improving the stability and safety in vehicle braking. The ECU controls the braking to be more intelligent through the control of an electric control program, better realizes the electrical appliance and program intelligence of the automobile through the synergistic effect of the ECU, the electromagnetic coil assembly is controlled to act according to the feedback of different information (such as the speed, the power state and the braking state) of the automobile under different conditions by the ECU, the device can accurately monitor the service braking air pressure of the automobile air braking system, the braking air pressure is higher than the minimum safe braking air pressure, and the safety of the braking system is improved.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment according to the present invention.
Fig. 2 is a front view of the device of fig. 1.
Fig. 3 is a cross-sectional view of a solenoid valve of the apparatus of fig. 2.
Fig. 4 is an enlarged view of the apparatus of fig. 1 at II.
Fig. 5 is an enlarged view of the device of fig. 1 at I.
Fig. 6 is a schematic view of a preferred embodiment of the front structure of the noise reduction base of the present invention.
Fig. 7 is a schematic view of a preferred embodiment of a linear sealing lip according to the present invention.
Fig. 8 is an enlarged view of the device I shown in fig. 7.
Illustration of the drawings:
1-circuit board cover component, 2-plug, 3-program control board, 4-second mounting screw, 5-pressure sensor, 6-silencer, 7-silencing belt, 8-silencing base, 9-valve body, 10-guide sleeve, 11-return spring, 12-valve flap, 13-valve seat, 14-inner diameter snap spring, 15-guide cover, 16-first mounting screw, 17-piston, 18-framework gasket component, 19-mounting plate, 20-air inlet electromagnetic valve, 21-air outlet electromagnetic valve, 22-pressure-backup electromagnetic valve, 23-pressure plate, 24-third mounting screw, 25-filter screen, 26-terminal plate, 27-electromagnetic valve connector, 28-electromagnetic coil component, 29-fourth mounting screw, 30-pin, P11-first inlet, P12-second inlet, P21-first outlet, P22-second outlet, P3-outlet, P4-control port. 171-balance hole, 172-exhaust channel, 201-intake solenoid valve channel, 211-exhaust solenoid valve channel, 221-reserve pressure solenoid valve channel, A3-pilot cap upper cavity
Detailed Description
The invention will now be described in more detail with reference to specific examples, which are given by way of illustration only and are not intended to be limiting; any insubstantial modifications of the invention, which would be obvious to those skilled in the art, are intended to be included within the scope of the invention.
Example 1
As shown in fig. 1 and 2, the single-channel air pressure regulating device of the electric control brake system comprises an air control part and an electric control part, wherein the air control part comprises a valve body 9, a pilot cover 15, a piston 17, a valve clack 12 and a silencer 6, the electric control part comprises an electromagnetic coil assembly 28, the electric control part is positioned in a circuit board cover assembly 1, the circuit board cover assembly 1 comprises a program control board 3 and a circuit board cover and is connected with an ECU through two plugs 2 (shown in fig. 5), the electromagnetic coil assembly 28 comprises a pressure-preparing electromagnetic valve 22, an exhaust electromagnetic valve 21 and an air inlet electromagnetic valve 20, and the electromagnetic valves are arranged side by side and fixed on a mounting plate 19 together with a pressure sensor 5. A circuit board gland 26 is arranged in the circuit board cover component 1, and the circuit board gland 26 is connected with a circuit board through a small buckle to play a role in protecting the circuit board from short circuit (as shown in figure 1).
As shown in fig. 3, the mounting plate 19 is fixedly connected to the valve body 9 by a third mounting screw 24, and in this embodiment, the mounting plate 19 functions as a fixing bracket, and each solenoid valve is fixedly mounted on the valve body 9 by two third mounting screws 24.
In the present embodiment, the air control portion is provided with a first air inlet P11 and a first output port P21 at the left end of the valve body 9, and a second air inlet P12 and a second output port P22 at the right end of the valve body 9.
In the present embodiment, the first air inlet P11 and the second air inlet P12 are externally connected to an air source, and the filter screen 25 is disposed inside the first air inlet P11 and the second air inlet P12 for filtering the air.
In the present embodiment, as shown in fig. 1, a pilot cap upper chamber a3 is formed between the pilot cap 15 and the upper portion of the piston 17, and the pilot cap 15 upper chamber communicates with the control port P4.
In the present embodiment, the pilot cap 15 and the valve body 9 are fixed to each other by the first mounting screw 16.
In the present embodiment, the circuit board cover assembly 1 includes pins 30.
In the present embodiment, the valve body 9 and the circuit board cover assembly 1 are fixed by the second mounting screws 4.
In this embodiment, the solenoid assembly 28 includes the pressure sensor 5 and is connected to the program control board 3 via the solenoid connector 27, so that the solenoid assembly is easily disassembled and maintained.
In this embodiment, the solenoid valve connector 27 is movably engaged with the program control board 3, so that the solenoid coil assembly 28 can be easily disassembled and maintained. The modularized design is convenient to communicate with the program control panel 3, and the disassembly and the assembly are convenient.
In the present embodiment, the program control board 3 is connected to the circuit board cover assembly 1 by using the fourth mounting screws 29.
In this embodiment, a Y-ring structure 182 is disposed at the contact position of the frame gasket assembly 18 and the piston 17, and the Y-ring structure 182 stabilizes the movement of the piston 17.
In this embodiment, a valve flap 12 is disposed below a valve seat 13, an end surface of the valve flap 12 contacts the valve seat 13, the valve seat 13 is fixed on the valve body 9 by an inner diameter snap spring 14, and a return spring 11 is disposed between the valve flap 12 and the guide sleeve 10.
In this embodiment, a sealing lip is disposed inside the valve flap 12 to movably seal with the guide sleeve 10. A linear sealing lip is arranged inside the circumference of the valve clack 12 and movably sealed with the outside of the circumference of the guide sleeve 10.
In this embodiment, a silencing base 8 is arranged at the lower part of the valve body 9 and is connected with the silencer 6, and the silencer is fastened on the valve body 9 through a lock catch.
In this embodiment, the solenoid coil assembly 28 and the pressure sensor 5 are connected to the circuit board cover assembly 1 through the solenoid connector 20, as shown in fig. 1.
In the embodiment, the circuit board cover assembly 1 is connected with the ECU through a wire harness, and signal receiving and feedback are realized. The whole air pressure adjusting device is communicated with the ECU through the circuit board cover assembly through a cable.
The middle of the pin 30 is provided with a pin hole E1, the periphery of the pin hole is tightly matched with the circuit board matching part E2, and the small hole of the program control board 3 is pressed and tightly matched, so that the disassembly and the maintenance are convenient. When the contact pin is matched with the circuit board hole in a matched mode, the size of the contact pin hole can be changed according to the interference force of the contact pin and the circuit board hole in a matched mode, the contact pin and the circuit board hole are guaranteed not to be installed due to the fact that the interference size is too large, the contact pin and the circuit board hole are finally determined to be matched safely and reliably, and the transmission of electric signals of the electromagnetic coil assembly 28 and the contact pin 30 is guaranteed.
The boss 61 of the silencer 6 is connected with the groove 91 of the valve body 9 in a buckling mode, so that the installation is convenient and reliable, and meanwhile, the installation space is saved.
In the present embodiment, when the intake solenoid valve 20 operates, the intake solenoid valve 20 communicates with the intake port.
In the present embodiment, the pressure sensor 5 communicates with the output port.
In the present embodiment, when the exhaust solenoid valve 21 operates, the exhaust solenoid valve 21, the first output port P21, and the second output port P22 communicate with the muffler.
In the present embodiment, the pressure preparation solenoid valve 22 communicates with the control port P4.
The embodiment also provides an automobile, and the device for regulating the single-channel air pressure of the electric control brake system comprises any one of the devices for regulating the single-channel air pressure of the electric control brake system.
When the single-channel air pressure adjusting device of the electric control brake system works, the single-channel air pressure adjusting device can be used for braking through electric control and pneumatic control (non-electric control); the electric control refers to that the single-channel air pressure adjusting device of the electric control brake system receives an electric signal fed back by an external power supply, converts the electric signal into air pressure through the electromagnetic coil assembly 28, and then transmits the air pressure to each chamber to implement braking; the pneumatic control means that an external air source directly enters the single-channel air pressure adjusting device of the electric control brake system through the control port P4, so that the output port of the single-channel air pressure adjusting device of the electric control brake system performs braking.
When the vehicle runs, compressed air passes through the first air inlet P11 and the second air inlet P12, air pressure is always available at the air inlets, the compressed air is filtered by the filter screen 25 and then enters the valve body 9, at the moment, the valve clack 12 is in a closed state, and the foot valve control port P4 has no air pressure input.
Service braking (electrical control): when the vehicle runs normally, the air pressure at the air inlet P12 stays in the B1 area, and the valve clack 12 and the air inlet electromagnetic valve 20 are in a closed state. When the running vehicle needs to be braked, a driver steps on the foot valve, and the displacement sensor in the foot valve generates an electric signal to transmit the electric signal to the central ECU. The ECU sends an electrifying working signal to the contact pin 30, and the standby pressure electromagnetic valve 22 and the air inlet electromagnetic valve 20 are electrified to work. Since the electrical signal is operated faster than the pneumatic signal, the energizing operation of the backup solenoid valve 22 cuts off the pneumatic pressure from the foot valve output port through the foot valve control port P4 of the present apparatus, that is, the backup solenoid valve passage 221 is cut off, and the P4 pneumatic pressure cannot pass.
The intake solenoid valve 20 is turned on after being energized, the intake solenoid valve passage 201 at the intake solenoid valve 20 is opened, and the air pressure in the area a3 changes the displacement of the piston 17. The lower end of the piston 17 pushes the valve flap 12 open against the pressure of the return spring 11, and compressed air reaches the first output port P21 and the second output port P22 from the intake port. The return spring 11 acts against the piston 17 to quickly maintain the air pressure in the upper and lower chambers of the piston 17 in equilibrium. The air pressure in the upper chamber A3 area of the pilot cover is the same as the air pressure in the A1 area. The air pressure in the A1 area reaches the B2 area through the internal channel and then reaches the pressure sensor 5, and the first output port P21 and the second output port P22 deliver the brake pressure to the brake chamber to complete the electrically controlled service brake, which is a boosting stage.
When the pressure of the brake air chamber needs to be maintained, the ECU sends a working signal to the plug pin 30, the air inlet electromagnetic valve 20 is powered off, the air inlet electromagnetic valve 20 is closed, the air inlet electromagnetic valve channel 201 is closed, and the pressure transmission from the B1 area to the C1 area is blocked. Since the pressure in the A3 zone is the same as that in the a1 zone, the brake chamber pressure is in a hold state, which is a pressure holding stage. At this time, the standby pressure solenoid valve 22 is in the energized state, and both the intake solenoid valve 20 and the exhaust solenoid valve 21 are in the de-energized state.
When the pressure of the brake air chamber needs to be reduced or the brake is released, the ECU sends a working signal to the contact pin 30, the air inlet electromagnetic valve 20 is in a power-off state, and the air outlet electromagnetic valve 21 and the pressure preparation electromagnetic valve 22 are both electrified. The exhaust solenoid valve passage 211 is opened so that the air pressure in the pilot cover upper chamber a3 is exhausted to the atmosphere through the C1 area, the noise damping base 8 and the noise damping band 7. At this point, the air pressure in the area A3 of the pilot cap is lower than that in the lower chamber, and the pressure balance is broken. The return spring 11 pushes the valve flap 12 and the piston 17 to move upward, the valve flap 12 contacts the valve seat 13 again, and the exhaust passage 172 of the valve flap 12 and the piston 17 is opened. At this time, the air pressure in the brake chamber is discharged through the port P22 along the exhaust passage 172, D1 through the muffler base 8, the muffler band 7 and the muffler 6. The electrically controlled service brake is released, which is the decompression phase. The air pressure of the brake chamber is exhausted into the atmosphere through the silencing base 8 and the silencing belt 7, and the exhaust noise is reduced within an acceptable range through filtering, so that the environmental protection requirement is met.
When the central ECU detects that the releasing speed of the foot brake valve is high through monitoring a displacement sensor of the foot brake valve, the central ECU controls the standby pressure electromagnetic valve 22 to be powered off, and the standby pressure electromagnetic valve 22 and the exhaust electromagnetic valve 21 jointly act to quickly exhaust the air pressure in the area A3 on the pilot cover upper cavity of the piston 17, so that the pressure of the brake air chamber is quickly released, and the aim of releasing the brake is fulfilled.
When the electric control brake fails, the conventional mechanical brake can also meet the vehicle braking requirement. The brake module is compact in structure, high in integration level and high in functional strength.
Service braking (mechanical control): when the vehicle needs to be braked, the driver depresses the foot valve, the air pressure at the output port of the foot valve passes through the foot valve control port P4, the standby pressure solenoid valve channel 221, the area C1 and the area A3 of the pilot cover upper cavity, and the piston 17 is made to change in displacement. The lower end of the piston 17 overcomes the pressure of the return spring 11 to open the valve flap 12, so that the air pressure in the B1 area flows to the second output port P22 through the A1 area. The return spring 11 acts against the piston 17 to quickly balance the air pressures of the upper and lower cavities of the piston 17, so that the air pressure of the upper cavity A3 of the pilot cap is the same as the air pressure of the upper cavity A1. The second output port P22 delivers brake pressure to the brake chamber to effect service braking, which is a boost phase.
When the driver releases the foot valve, the air pressure path of the upper cavity of the piston 17 is the pilot cover upper cavity A3, the C1 area, the standby pressure solenoid valve channel 221 and the control port P4 air pressure which is exhausted through the foot valve exhaust port. The return spring 11 pushes the valve flap 12 and the piston 17 to move upward, the valve flap 12 contacts the valve seat 13 again, and the exhaust passage 172 of the valve flap 12 and the piston 17 is opened. At this time, the air pressure in the brake chamber is discharged through the second outlet P22, the exhaust passage 172, and the D1 region via the noise deadening base 8 and the noise deadening band 7, and the service brake is released, which is a pressure reduction stage. The exhaust port P3 is used to exhaust air to the atmosphere.
Example 2
Example 2 is similar to example 1 except that in this example, as shown in fig. 7 and 8, the sealing lip is a linear sealing lip, which is a multi-layer linear sealing structure, so that the two sealing lips of the valve flap 12 and the guide sleeve 10 maintain a movable sealing state when the vehicle is braked normally.
In this embodiment, the linear sealing lip is internally provided with a plurality of layers of concave-convex grooves, including V-shaped concave-convex grooves or arc-shaped concave-convex grooves. And lubricating oil is arranged in the concave-convex groove to reduce the motion resistance of the piston 17.
The valve sealing lip of the valve clack 12 improves the traditional surface sealing into a multilayer linear lip sealing structure, so that the sealing performance far exceeds that of a general rubber part, and the sealing performance is more stable, the sealing performance of the design mode is better and more effective than that of a surface sealing mode, the sealing performance of a product is greatly increased, and the stability and the safety in vehicle braking are improved. The adoption of the multilayer linear sealing strip is like a multilayer sealing ring, so that the multilayer protection is provided for the sealing element, and the sealing reliability is improved. The concave-convex groove part between the multi-layer sealing rings can store lubricating oil, so that when two sealing lips of the valve clack 12 and the guide sleeve 10 move relatively, the multi-layer structure at the sealing lips cannot generate great resistance, the movement resistance of the piston 17 is reduced, and the opening pressure of the valve is smaller. In addition, in the aspect of abrasion, if abrasion occurs, the multilayer linear sealing structure can assist sealing under the action of air pressure, and the reliability is improved.
While the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the invention as set forth in the following claims. The foregoing detailed description has been presented in conjunction with specific embodiments of this invention, but is not intended to limit the invention thereto. Any simple modifications of the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A single-channel air pressure adjusting device of an electric control brake system comprises an air control part and an electric control part, wherein the air control part comprises a valve body (9), a pilot cover (15), a piston (17), a valve clack (12) and a silencer (6); the electric control part comprises an electromagnetic coil assembly (28), and is characterized in that the electric control part is positioned in the circuit board cover assembly (1); the electromagnetic coil assembly (28) comprises a pressure preparation electromagnetic valve (22), an exhaust electromagnetic valve (21) and an air inlet electromagnetic valve (20), and the electromagnetic valves are arranged side by side and fixed on the mounting plate (19) together with the pressure sensor (5);
the mounting plate (19) is fixedly connected with the valve body (9) through an inner third mounting screw (24);
the pneumatic control part is provided with a first air inlet (P11) and a first output port (P21) at the left end of the valve body (9), and a second air inlet (P12) and a second output port (P22) at the right end of the valve body (9);
the outer parts of the first air inlet (P11) and the second air inlet (P12) are connected with an air source, and a filter screen (25) is arranged inside the first air inlet (P11) and the second air inlet (P12) and is used for filtering the air;
a pilot cover upper cavity (A3) is formed between the pilot cover (15) and the upper part of the piston (17), and the pilot cover upper cavity (A3) is communicated with a control port (P4);
the piston (17) is provided with a balance hole (171) which can supplement the air pressure of the upper cavity and the lower cavity of the piston (17) and quickly balance the air pressure of the piston (17) so as to achieve the purpose of stably outputting the air pressure of the output port;
the pilot cover and the valve body are fixed by a first mounting screw (16).
The lower part of the piston (17) is provided with a framework gasket component (18), the framework gasket component (18) is provided with an exhaust hole (181), and the air pressure of the upper cavity and the lower cavity of the piston (17) is balanced, so that the piston (17) is stably balanced.
The outside of the piston is provided with a skeleton gasket component which plays a role in guiding, positioning and sealing when the piston moves up and down.
Piston (17) lower part set up valve clack (12), valve clack (12) up end and disk seat (13) contact, set up valve clack return spring (11) between valve clack (12) and uide bushing (10), install in uide bushing (10) valve clack return spring (11).
2. The device for regulating the single-channel air pressure of the electric control brake system according to claim 1, characterized in that a linear sealing lip is arranged inside the circumference of the valve flap (12) and movably sealed with the outside of the circumference of the guide sleeve (10).
3. A single-channel air pressure regulating device of an electric control brake system according to claim 1, characterized in that a Y-shaped ring structure (182) is arranged at the contact position of the skeleton gasket assembly (18) and the piston (17), and the Y-shaped ring structure (182) stabilizes the piston (17) for movement.
4. An electrically controlled brake system with single channel air pressure regulation as claimed in claim 2 wherein said linear sealing lipMouth pieceThe interior of the shell is provided with a plurality of layers of concave-convex grooves, including V-shaped concave-convex grooves or arc-shaped concave-convex grooves; and lubricating oil is arranged in the concave-convex groove and used for reducing the motion resistance of the valve clack (12) and the guide sleeve (10).
5. A device for regulating single-channel air pressure of an electric control brake system according to claim 1, characterized in that a muffler base (8) is arranged at the lower part of the valve body (9), the muffler (6), and the muffler (6) is fastened at the lower part of the valve body (9) through a lock catch.
6. A single-channel air pressure regulating device of an electric control brake system according to claim 1, characterized in that the solenoid assembly (28) comprises a pressure sensor (5), and the solenoid assembly (28) and the pressure sensor (5) are connected with the program control board (3) through a solenoid connector (27).
7. An electrically controlled brake system single channel air pressure regulating device according to claim 1, wherein the circuit board cover assembly (1) is connected with the ECU through a wire harness, and the whole air pressure regulating device is in communication with the ECU through the circuit board cover assembly through a cable.
8. A single-channel air pressure regulating device of an electric control brake system according to claim 1, characterized in that the air inlet solenoid valve (20) is communicated with an air inlet, and the pressure sensor (5) is communicated with an output port.
9. A single-channel air pressure regulating device of an electric control brake system according to claim 1 or 3, characterized in that the exhaust solenoid valve (21), the first output port (P21) and the second output port (P22) are communicated with a muffler.
10. A single-channel air pressure regulating device of an electric control brake system according to claim 1, characterized in that the pressure-backup solenoid valve (22) is communicated with a control port (P4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010534256.6A CN111572520A (en) | 2020-06-11 | 2020-06-11 | Single-channel air pressure adjusting device of electric control braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010534256.6A CN111572520A (en) | 2020-06-11 | 2020-06-11 | Single-channel air pressure adjusting device of electric control braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111572520A true CN111572520A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010534256.6A Pending CN111572520A (en) | 2020-06-11 | 2020-06-11 | Single-channel air pressure adjusting device of electric control braking system |
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| GB8910567D0 (en) * | 1989-05-08 | 1989-06-21 | Dewandre Co Ltd C | Modulator type brake valve |
| WO1999010213A1 (en) * | 1997-08-22 | 1999-03-04 | Alliedsignal Inc. | Abs modulator solenoid with a pressure balancing piston |
| US20050204732A1 (en) * | 2004-03-16 | 2005-09-22 | Denso Corporation | Pressure detecting apparatus having solenoid valve and pressure sensor |
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| CN109501791A (en) * | 2018-09-30 | 2019-03-22 | 浙江万安科技股份有限公司 | Integrated form EPB valve assembly and EPB electronic brake system |
| CN208897047U (en) * | 2018-03-14 | 2019-05-24 | 瑞立集团瑞安汽车零部件有限公司 | A kind of integrated form EBS rear axle brake apparatus and the automobile for installing the device |
| CN209381978U (en) * | 2018-09-30 | 2019-09-13 | 浙江万安科技股份有限公司 | Integrated form EPB valve assembly and EPB electronic brake system |
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2020
- 2020-06-11 CN CN202010534256.6A patent/CN111572520A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8910567D0 (en) * | 1989-05-08 | 1989-06-21 | Dewandre Co Ltd C | Modulator type brake valve |
| WO1999010213A1 (en) * | 1997-08-22 | 1999-03-04 | Alliedsignal Inc. | Abs modulator solenoid with a pressure balancing piston |
| US20050204732A1 (en) * | 2004-03-16 | 2005-09-22 | Denso Corporation | Pressure detecting apparatus having solenoid valve and pressure sensor |
| CN208134316U (en) * | 2018-03-14 | 2018-11-23 | 瑞立集团瑞安汽车零部件有限公司 | A kind of EBS bridge control device and the automobile for installing the device |
| CN208897047U (en) * | 2018-03-14 | 2019-05-24 | 瑞立集团瑞安汽车零部件有限公司 | A kind of integrated form EBS rear axle brake apparatus and the automobile for installing the device |
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| CN209381978U (en) * | 2018-09-30 | 2019-09-13 | 浙江万安科技股份有限公司 | Integrated form EPB valve assembly and EPB electronic brake system |
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