CN108891400B - Pneumatic braking energy feedback piston type blocking control valve for new energy automobile - Google Patents
Pneumatic braking energy feedback piston type blocking control valve for new energy automobile Download PDFInfo
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- CN108891400B CN108891400B CN201810963463.6A CN201810963463A CN108891400B CN 108891400 B CN108891400 B CN 108891400B CN 201810963463 A CN201810963463 A CN 201810963463A CN 108891400 B CN108891400 B CN 108891400B
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- control valve
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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
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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
- B60T13/74—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 electrical assistance or drive
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a pneumatic braking energy feedback piston type blocking control valve of a new energy automobile, which comprises a brake pedal brake valve, a pneumatic braking pipeline and a hydraulic braking system, wherein the brake pedal brake valve is connected with the pneumatic braking pipeline; the brake pedal brake valve is also connected with a brake lamp switch and a brake analog sensor; the brake lamp switch, the brake analog quantity sensor and the accelerator analog quantity sensor are connected to the whole vehicle controller VCU, the whole vehicle controller VCU then generates electricity through the motor controller MCU to brake at a retarded speed, and the energy is recovered to the power battery; and a blocking control valve is arranged between the brake pedal brake valve and the pneumatic brake pipeline, and is also connected to the whole vehicle controller VCU. The invention is to connect two identical blocking control valves in series in two pneumatic brake pipeline loops output by the brake valve of the automobile brake pedal, and convert kinetic energy and/or potential energy of the automobile into electric energy of a power battery for storage in various working conditions so as to save energy.
Description
Technical Field
The invention relates to a new energy automobile, in particular to a pneumatic braking energy feedback piston type blocking control valve of the new energy automobile.
Background
At present, new energy vehicles commonly have energy recovery designs. Because of the limitation of the requirements of the regulations (such as GB 7258, GB 12676 and the like) in the braking aspect, most vehicle braking systems can work synchronously when a driver presses down a pedal, and the static friction material and the wheel high-speed rotation friction material are driven to rub each other to generate braking force so as to force the vehicle to stop. In the period, a large amount of kinetic energy or potential energy of the vehicle is converted into useless heat energy, and the useless heat energy is wasted; on long downhill grades, these thermal energies can affect the vehicle brake thermal stability, causing the brake to thermally fade.
FIG. 1 is a partial schematic diagram of a prior art pneumatic brake system.
FIG. 2 is a block flow diagram of a prior art braking energy recovery system.
In fig. 1, 1 is an air reservoir (rear axle), 2 is an air reservoir (front axle), and 3 is an exhaust port of a brake valve of a brake pedal; 5 is a brake lamp switch which is mechanically connected with a brake valve of a brake pedal to follow, 6 is an analog sensor which is mechanically connected with the brake valve of the brake pedal to follow, and is used for judging the stepping depth of the brake pedal by a vehicle controller VCU; 7 is a rear axle relay valve, 8 is a front axle relay valve, 9 is a brake pedal brake valve, and 11 and 12 are two independent air source input ports of the brake pedal brake valve 9; 21/22 are the front axle and rear axle outlets of the brake pedal brake valve 9.
In order to ensure the running safety of the vehicle, the energy recovered by the driving motor is very limited, and due to participation of a braking system, a lot of energy which can be fully utilized is definitely lost, and the energy cannot be recovered by the driving motor for generating electricity and braking at a retarded speed.
The vehicle therefore requires a pneumatic braking system to perform the following functions:
When the vehicle is at a high speed or is in a gentle slope, most of the situations of a driver can not encounter emergency braking, the accelerator pedal is generally released, the brake pedal is lightly stepped on, energy can be saved through the slow braking of the vehicle in a sliding mode, meanwhile, the abrasion of tires can be reduced, and the pneumatic braking system can not be put into operation at the moment.
The higher the vehicle speed is, the higher the voltage generated by the generator converted from the driving motor can be enough to charge the power battery. If the vehicle speed is very low (for example, less than or equal to 15 km/h), the electric quantity generated by the driving motor is insufficient, the voltage is low, the power battery cannot be charged, and at the moment, if the brake pedal is still depressed, the pneumatic brake system needs to be put into operation.
Disclosure of Invention
The invention provides a pneumatic braking energy feedback piston type blocking control valve of a new energy automobile, which aims at saving energy sources by converting kinetic energy and/or potential energy of the automobile into electric energy of a power battery and storing the electric energy according to the working conditions of the automobile (high speed, shallow stepping of a brake pedal, slow stepping of the brake pedal and non-stepping of an accelerator pedal) by a whole automobile controller VCU.
The technical scheme includes that the pneumatic braking energy feedback piston type blocking control valve of the new energy automobile comprises a brake pedal brake valve, wherein the brake pedal brake valve is connected with a pneumatic brake pipeline, and the pneumatic brake pipeline is connected to a service brake system for working;
the brake pedal brake valve is also connected with a brake lamp switch and a brake analog sensor;
The brake lamp switch, the brake analog quantity sensor and the accelerator analog quantity sensor are connected to the whole vehicle controller VCU, the whole vehicle controller VCU then generates electricity through the motor controller MCU to brake at a retarded speed, and the energy is recovered to the power battery; the method is characterized in that: and a blocking control valve is arranged between the brake pedal brake valve and the pneumatic brake pipeline, wherein the blocking control valve is of a piston type structure, and meanwhile, the piston type blocking control valve is also connected to the whole vehicle controller VCU.
The further improvement is that: the piston type blocking control valve comprises an upper shell 71 and a lower shell 72; a connected double piston 77 is arranged between the upper shell 71 and the lower shell 72; the upper shell 71 and the small piston of the conjoined double piston 77 form a B cavity, and the side surface is also provided with a B cavity piston control air channel opening 4; the middle part of the lower shell 72 is upwards protruded and provided with a valve sealing valve port 74, the valve sealing valve port 74 is downwards provided with an outlet II 23/24 through the protrusion, and the lower shell 72 is laterally provided with an outlet I21/22;
The middle part of the connected double piston 77 is provided with a rubber sealing flat gasket 73 downwards to form a sealing element with a valve sealing valve port 74 of the lower shell 72;
the conjoined double piston 77 moves up and down in the axial direction of the upper and lower housings 71 and 72, the small piston moves only in the upper housing 71, and the large piston moves only in the lower housing 72; the middle of the piston, the upper shell 71 and the lower shell 72 form a cavity C, and the side surface of the upper shell 71 is also provided with a C cavity air pressure balance vent hole 32;
The conjoined double piston 77 and the lower shell 72 form a cavity A, and a return spring 78 is arranged to act on the plane of the large piston S2; the large piston of the conjoined double piston 77 is provided with a rubber sealing ring 75 to form dynamic seal with the lower shell 72; the small piston of the conjoined double piston 77 is provided with a rubber sealing ring 76 and forms a dynamic seal with the upper housing 71.
The further improvement is that: the connection relation of the piston type blocking control valve is as follows: comprises an air reservoir air source 78, the air reservoir air source 78 is connected with a pressure regulating valve 84, the output of the pressure regulating valve 84 is connected with a blocking control valve through a two-position three-way normally closed electromagnetic valve 83, one end of the two-position three-way normally closed electromagnetic valve 83 is connected with the double-piston B cavity control air passage port 4, and the other end is connected with the atmosphere exhaust port 31;
The blocking control valves are divided into a rear axle brake system blocking control valve 81 and a front axle brake system blocking control valve 82.
The further improvement is that: the piston type blocking control valve is matched with the performance of the whole vehicle, and is arranged by arranging a pressure regulating valve 84 or by arranging the effective air pressure acting area proportion of the large piston and the small piston of the conjoined double piston 77.
The beneficial effects are that:
The invention is to connect two identical blocking control valves in series in two pneumatic brake pipeline loops output by the brake valve of the automobile brake pedal, and convert kinetic energy and/or potential energy of the automobile into electric energy of a power battery for storage in various working conditions so as to save energy.
1. When the driver releases the accelerator and lightly presses the brake pedal (such as a load state of less than or equal to 15% or less than or equal to 20%) and needs to drive the motor to enter a generator state, and feedback energy is used for braking, the output gas circuit of a brake valve of a normal brake pedal is blocked through the control of a whole vehicle controller VCU, and the friction braking of a brake of a conventional pneumatic braking system is released. The kinetic energy or potential energy of the vehicle is recovered to the power battery as much as possible, and the vehicle is braked slowly by driving the motor to generate electricity and carry out feedback braking.
2. When the power battery of the vehicle is full, the vehicle cannot be recharged; or in other working conditions, the VCU of the whole vehicle controller does not control any, and the normal work of the conventional brake system is not influenced; the driving motor does not perform the feedback braking.
3. When the vehicle speed is lower (for example, the vehicle speed is less than or equal to 20km/h or less than or equal to 10 km/h), the power generation voltage of the driving motor is smaller than the system voltage of the power battery, and the power battery cannot be charged; the VCU of the whole vehicle controller does not control any, and the normal work of a conventional braking system is not affected.
4. When the brake pedal is stepped down to a certain extent, which represents that the vehicle encounters more urgent matters, the whole vehicle controller VCU has no influence on the normal braking system air path, and the output of the brake pedal brake valve directly controls all normal pneumatic braking systems.
5. The driving motor generates electricity to brake slowly, and the energy is recovered to the power battery, so that the abrasion of the tire, the brake shoe and the brake hub can be reduced, the temperature of the tire and the brake hub can be reduced, the service life of the tire can be prolonged, and the accident caused by braking failure of the brake hub due to heat fading can be reduced.
6. When the battery electric quantity is full, the driving motor is in discharge reverse drag braking (the rotation direction of the motor driving wheels is opposite to the running direction of the vehicle), and the whole vehicle controller can block the output gas circuit of the normal brake pedal brake valve according to the control strategy and the safety requirement, so that the friction braking of the brake of the conventional pneumatic brake system is released.
Drawings
FIG. 1 is a partial schematic diagram of a present pneumatic brake system.
FIG. 2 is a block flow diagram of a current braking energy recovery system.
In fig. 1, 1 is an air reservoir (rear axle), 2 is an air reservoir (front axle), 3 ports are exhaust ports of a brake pedal brake valve, 5 is a brake lamp switch mechanically coupled and driven by the brake pedal brake valve, 6 is an analog sensor mechanically coupled and driven by the brake pedal brake valve, used for a vehicle controller VCU to judge the brake pedal depression depth, 7 is a rear axle relay valve, 8 is a front axle relay valve, 9 is the brake pedal brake valve (series mode), 11 and 12 are two independent air source input ports of the brake pedal brake valve, and 21/22 is a brake pedal brake valve outlet.
FIG. 3 is a partial flow chart of the pneumatic brake system of the present invention.
Fig. 4 is a partial schematic diagram of a pneumatic brake system of the present invention.
Fig. 5 is a structural view of the piston type blocking control valve of the present invention.
In fig. 4, 78 is an air reservoir air source, 81 is a brake system blocking control valve of a rear axle of foot brake, 82 is a brake system blocking control valve of a front axle of foot brake, 83 is a two-position three-way normally closed electromagnetic valve, 84 is a pressure regulating valve, 61 and 62 are power supplies controlled by a vehicle controller VCU, 21/22 outlet one, 23/24 is outlet two, 1 is a two-position three-way air inlet high-pressure air source, 4 is a diaphragm B cavity control air channel port, and 31 is a two-position three-way air inlet high-pressure atmosphere interface.
In fig. 5, 77 is a conjoined double piston, S1 is a conjoined double piston 77 on the upper surface of a small piston of a cavity B, S2 is a conjoined double piston 77 on the lower surface of a large piston of a cavity a, 4 is a diaphragm B cavity control air passage port, 71 is an upper housing, 72 is a lower housing, 73 is a rubber sealing flat pad, 74 is a valve sealing valve port, 78 is a conjoined double piston return spring, 76 is a conjoined double piston 77 small piston sealing ring, 75 is a conjoined double piston 77 large piston sealing ring.
Detailed Description
The invention is shown in figures 3-5.
The new energy automobile pneumatic braking energy feedback piston type blocking control valve comprises a brake pedal brake valve, wherein the brake pedal brake valve is connected with a pneumatic brake pipeline, and the pneumatic brake pipeline is connected to a service brake system for working;
the brake pedal brake valve is also connected with a brake lamp switch and a brake analog sensor;
The brake lamp switch, the brake analog quantity sensor and the accelerator analog quantity sensor are connected to the whole vehicle controller VCU, the whole vehicle controller VCU then generates electricity through the motor controller MCU to brake at a retarded speed, and the energy is recovered to the power battery; and a blocking control valve is arranged between the brake pedal brake valve and the pneumatic brake pipeline, wherein the blocking control valve is of a piston type structure, and meanwhile, the piston type blocking control valve is also connected to the whole vehicle controller VCU.
The piston type blocking control valve comprises an upper shell 71 and a lower shell 72; a connected double piston 77 is arranged between the upper shell 71 and the lower shell 72; the upper shell 71 and the small piston of the conjoined double piston 77 form a B cavity, and the side surface is also provided with a B cavity piston control air channel opening 4; the middle part of the lower shell 72 is upwards protruded and provided with a valve sealing valve port 74, the valve sealing valve port 74 is downwards provided with an outlet II 23/24 through the protrusion, and the lower shell 72 is laterally provided with an outlet I21/22;
The middle part of the connected double piston 77 is provided with a rubber sealing flat gasket 73 downwards to form a sealing element with a valve sealing valve port 74 of the lower shell 72;
the conjoined double piston 77 moves up and down in the axial direction of the upper and lower housings 71 and 72, the small piston moves only in the upper housing 71, and the large piston moves only in the lower housing 72; the middle of the piston, the upper shell 71 and the lower shell 72 form a cavity C, and the side surface of the upper shell 71 is also provided with a C cavity air pressure balance vent hole 32;
The conjoined double piston 77 and the lower shell 72 form a cavity A, and a return spring 78 is arranged to act on the plane of the large piston S2; the large piston of the conjoined double piston 77 is provided with a rubber sealing ring 75 to form dynamic seal with the lower shell 72; the small piston of the conjoined double piston 77 is provided with a rubber sealing ring 76 and forms a dynamic seal with the upper housing 71.
The connection relation of the piston type blocking control valve is as follows: comprises an air reservoir air source 78, the air reservoir air source 78 is connected with a pressure regulating valve 84, the output of the pressure regulating valve 84 is connected with a piston type blocking control valve through a two-position three-way normally closed electromagnetic valve 83, one end of the two-position three-way normally closed electromagnetic valve 83 is connected with the double-piston B cavity control air passage port 4, and the other end is connected with the atmosphere exhaust port 31;
The piston type blocking control valve is divided into a rear axle brake system blocking control valve 81 and a front axle brake system blocking control valve 82.
The piston type blocking control valve is matched with the performance of the whole vehicle, and is arranged by arranging a pressure regulating valve 84 or by arranging the effective air pressure acting area proportion of the large piston and the small piston of the conjoined double piston 77.
When the vehicle is in use, there are several states as follows.
1. The motor is not required to be driven for feedback braking, and a conventional pneumatic braking system is required to work.
Normally, when the vehicle control VCU is not controlled, the control air channel port 4 of the connected double piston 77B cavity of the blocking control valve is not communicated with high-pressure air and is directly communicated with the atmosphere. The rubber gasket 73 and the valve sealing port 74 are in an open state under the urging force of the return spring 78. At this time, the brake pedal brake valve output air pressure enters the A cavity through the first outlet 21/22, further pushing the conjoined double piston 77 to move upwards, and the rubber valve port 73 and the valve sealing plane 74 are in a fully opened state. The first outlet 21 and the second outlet 23 are communicated, and other devices such as valves of a conventional braking system are directly controlled, so that the conventional braking system is not affected.
2. The driving motor is used for feedback braking, but a conventional air braking system is not required to work
If the vehicle controller VCU judges the current vehicle condition, the motor is required to be driven to generate power for feedback braking. The two-position three-way normally closed valve 83 controlled by the vehicle controller is electrified to control the cavity control air passage opening 4 of the connected double piston 77B, the air source is connected, and the pressure force of the cavity B acts on the surface S1 to overcome the restoring force of the return spring 78, so that the connected double piston 77 is pushed to move downwards, and the rubber sealing flat gasket 73 and the valve sealing valve port 74 are in a closed state.
At this time, the gas circuit loop between the brake valve of the brake pedal and the rear brake system is blocked. The conventional braking system does not work, and at the moment, the driving motor is turned into a generator state, so that the vehicle energy is recovered as much as possible, and the friction heating work of the brake drum or the brake disc can be eliminated.
The whole vehicle controller can adjust the feedback braking force of the driving motor according to the requirements, such as motor current, vehicle speed, state of charge (SOC) of a power battery, temperature, namely, change the recovery speed of the feedback braking energy and adjust the vehicle speed and the deceleration.
3. The conventional pneumatic braking system works, and the feedback braking of the driving motor is performed simultaneously
On the basis of the second state, if the brake pedal is depressed relatively deeply, the output pressure of the first outlet 21 is relatively high, and the vehicle is required to generate relatively large braking force.
Because the area of the large piston S2 of the conjoined double piston 77 is larger than that of the small piston S1, the same air pressure acts on the surface S2 and the surface S1, and the air pressure acting force acting on the surface S2 is larger than the air pressure acting force acting on the surface S1, the conjoined double piston 77 can be pushed to move upwards, so that the rubber sealing flat pad 73 and the valve sealing valve port 74 are in an open state.
When the air pressure of the first outlet 21 reaches a certain pressure, the air pressure acting force acting on the large piston S2 of the cavity A is combined with the restoring force of the return spring 78 to be larger than the acting force acting on the small piston S1 of the air pressure of the cavity B, and the rubber sealing flat gasket 73 and the valve sealing valve port 74 are in an open state. The first outlet 21 is communicated with the second outlet 23, the brake system starts to work, the brake air chamber is driven to generate braking force, and the vehicle driving motor back brake and the conventional air brake work simultaneously.
The highest blocking air pressure value of the cavity A is controlled by the effective air pressure acting area ratio of the large piston S2 and the small piston S1 of the connected double piston 77; while the highest blocking air pressure value of the a cavity is controlled by the output air pressure of the pressure regulating valve 84 in fig. 4.
Therefore, in order to ensure the running safety of the vehicle and the recovery efficiency of braking energy, the highest blocking air pressure value of the cavity a is adjusted according to the control strategy of the vehicle controller and the vehicle safety, and the feedback capability of the driving motor can be selected, when the air pressure of the cavity a reaches 150kPa or 300kPa (or according to the air pressure value of the actual requirement state of the vehicle), the rubber sealing flat pad 73 and the valve sealing valve port 74 are opened.
4. Driver's foot away from brake pedal to release brake
The vehicle control VCU detects a brake pedal brake valve linkage brake switch off signal and a brake analog sensor signal, and confirms that a driver does not perform brake operation on the brake pedal brake valve.
The two-position three-way normally-closed electromagnetic valve 83 is powered off, the two-position three-way normally-closed electromagnetic valve 83 returns, and the air pressure of the blocking control valve B cavity controls the diaphragm B cavity to control the air channel port 4 to be unloaded and connected to the atmosphere.
The rubber gasket 73 and the valve sealing port 74 are kept open by the air pressure of the second outlet 23 and the first outlet 21. The air pressure of the output port of the second outlet 23 is discharged to the atmosphere through the first outlet 21, and the brake is released.
The rubber gasket 73 and the valve sealing port 74 are maintained in an open state by the restoring force of the return spring 78.
Claims (2)
1. The new energy automobile pneumatic braking energy feedback piston type blocking control valve comprises a brake pedal brake valve, wherein the brake pedal brake valve is connected with a pneumatic brake pipeline, and the pneumatic brake pipeline is connected to a service brake system for working; the brake pedal brake valve is also connected with a brake lamp switch and a brake analog sensor; the brake lamp switch, the brake analog quantity sensor and the accelerator analog quantity sensor are connected to the whole vehicle controller VCU, the whole vehicle controller VCU then generates electricity through the motor controller MCU to brake at a retarded speed, and the energy is recovered to the power battery; the method is characterized in that: a series connection blocking control valve is arranged between the brake pedal brake valve and the pneumatic brake pipeline, wherein the blocking control valve has a piston structure, and the piston type blocking control valve is also connected to the whole vehicle controller VCU;
The piston type blocking control valve comprises an upper shell (71) and a lower shell (72); a connected double piston (77) is arranged between the upper shell (71) and the lower shell (72); the upper shell (71) and the small piston of the conjoined double piston (77) form a B cavity, and the side surface is also provided with a B cavity piston control air passage (4); the middle part of the lower shell (72) is upwards protruded and provided with a valve sealing valve port (74), the valve sealing valve port (74) is downwards provided with an outlet II (23/24) through the protrusion, and the lower shell (72) is provided with an outlet I (21/22) towards the side surface; the middle part of the connected double piston (77) is downwards provided with a rubber sealing flat gasket (73) which forms a sealing element with a sealing valve port (74) of the lower shell (72);
The conjoined double piston (77) moves up and down in the axial direction of the upper shell (71) and the lower shell (72), the small piston only moves in the upper shell (71), and the large piston only moves in the lower shell (72); the middle of the piston, an upper shell (71) and a lower shell (72) form a cavity C, and the side surface of the upper shell (71) is also provided with an air pressure balance vent hole (32) for leading the cavity C to be in the atmosphere;
The large piston of the connected double piston (77) and the lower shell (72) form a cavity A, and a return spring (78) is arranged to act on the plane of the large piston; the large piston of the conjoined double piston (77) is provided with a rubber sealing ring (75) and forms dynamic seal with the lower shell (72); the small piston of the conjoined double piston (77) is provided with a rubber sealing ring (76) and forms dynamic seal with the upper shell (71);
The connection relation of the piston type blocking control valve is as follows: the device comprises an air storage cylinder air source, wherein the air storage cylinder air source is connected to a pressure regulating valve (84), the output of the pressure regulating valve (84) is connected with a blocking control valve through a two-position three-way normally closed electromagnetic valve (83), one end of the two-position three-way normally closed electromagnetic valve (83) is connected with a double-piston B cavity control air channel port (4), and the other end of the two-position three-way normally closed electromagnetic valve is connected with an atmosphere exhaust port (31);
The blocking control valve is divided into a rear axle brake system blocking control valve (81) and a front axle brake system blocking control valve (82).
2. The new energy automobile pneumatic braking energy feedback piston type blocking control valve according to claim 1, wherein the valve is characterized in that: the piston type blocking control valve is matched with the performance of the whole vehicle, and the effective air pressure acting area ratio of the large piston and the small piston of the connected double pistons (77) is adjusted by arranging a pressure regulating valve (84).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963463.6A CN108891400B (en) | 2018-08-23 | 2018-08-23 | Pneumatic braking energy feedback piston type blocking control valve for new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963463.6A CN108891400B (en) | 2018-08-23 | 2018-08-23 | Pneumatic braking energy feedback piston type blocking control valve for new energy automobile |
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| CN108891400A CN108891400A (en) | 2018-11-27 |
| CN108891400B true CN108891400B (en) | 2024-09-24 |
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| CN201810963463.6A Active CN108891400B (en) | 2018-08-23 | 2018-08-23 | Pneumatic braking energy feedback piston type blocking control valve for new energy automobile |
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| CN114572177B (en) * | 2020-12-02 | 2023-05-23 | 宇通客车股份有限公司 | Brake valve, new energy vehicle using brake valve and brake control method |
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| US5564794A (en) * | 1995-11-27 | 1996-10-15 | Westinghouse Air Brake Company | Train brake pipe pressure exhaust control system and regulating valve therefor |
| CN102745183B (en) * | 2012-07-11 | 2015-05-27 | 北京理工大学 | Energy-feedback active control type air braking system |
| DE102015016264A1 (en) * | 2015-12-15 | 2017-06-22 | Wabco Europe Bvba | Valve unit for pressure modulation in a compressed air brake system |
| CN207725229U (en) * | 2017-12-04 | 2018-08-14 | 吉林大学 | A kind of air pressure type braking energy recovery system |
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| CN101073991A (en) * | 2007-06-29 | 2007-11-21 | 清华大学 | Safety of braking system with regenerative brake function assure for electric automobile |
| CN202756742U (en) * | 2012-06-19 | 2013-02-27 | 昆明中铁大型养路机械集团有限公司 | Pneumatic control valve |
| CN208730974U (en) * | 2018-08-23 | 2019-04-12 | 东风华神汽车有限公司 | New-energy automobile air-pressure brake energy feedback piston type blocks control valve |
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