CN106314412B

CN106314412B - Electric control air processing unit with CAN function

Info

Publication number: CN106314412B
Application number: CN201610780439.XA
Authority: CN
Inventors: 王鲜艳; 李传武; 陈波; 朱叶; 许振好
Original assignee: Ruili Group Ruian Auto Parts Co Ltd
Current assignee: Ruili Group Ruian Auto Parts Co Ltd
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2022-10-21
Anticipated expiration: 2036-08-31
Also published as: CN106314412A

Abstract

The invention relates to an electric control air processing unit with CAN function, comprising: the electronic control unit of the ECU is provided with a sensor module and an ECU module with a CAN communication module; a circuit protection valve; and the dryer part is arranged on the other side of the loop protection valve and is also connected through a bolt, the CAN communication module CAN perform specific feedback according to the received automobile specific condition information, and the ECU electronic control unit processes air according to the information feedback received by the CAN communication module.

Description

Electric control air processing unit with CAN function

Technical Field

The invention relates to the field of air drying, in particular to an electric control air processing unit with a CAN function.

Background

The vehicle air processing unit is a combination of an air dryer and a multi-loop protection valve, and the air dryer cleans, dries and controls compressed air from an air compressor; the multi-loop protection valve is used for protecting the pressure of the system, so that the air processing unit provides a complete, simple, dry, clean, safe and effective air processing system for the automobile brake system.

With the development of heavy trucks, the widespread use of vehicle ECUs, and the use of vehicle air dryers, which make use of the system pressure monitored by the vehicle ECU, is known, for example, from the patent publication CN1826256a, which discloses an electronic compressed air system for automobiles, which comprises a compressed air supply section of the compressor and a compressed air consumption section of a plurality of foot brake circuits, which has compressed air consumption circuits supplied with compressed air via electric valves and compressed air storage containers, wherein at least the pressure in the foot brake circuits is monitored by sensors whose electrical signals are evaluated by an electronic control unit which controls the electric valves, the electric valves of the compressed air consumption circuits with and without the compressed air storage containers being closed in the normal de-energized state and being switchable into the open state by the electronic control unit when compressed air is required by the compressed air consumption circuits, thereby establishing communication with the foot brake circuits or their compressed air storage containers and/or the compressed air supply section. The system is provided with pressure sensors in a plurality of loops, so that the system has more parts, large volume, high cost and inconvenient installation and maintenance.

The main structural form of the existing air processing unit is that an unloading valve is arranged in a large valve body, and a drying cylinder with a molecular sieve therein is arranged on the valve body to form an air dryer assembly; and then is connected with a multi-loop protection valve assembly by bolts to form an air processing unit. Because the air processing unit is a combination of two assemblies, the air processing unit has the defects of large volume and high production cost. The utility model discloses a utility model patent of publication No. CN 202438249U discloses an automatically controlled formula vehicle air handling unit, and it includes air dryer assembly, automatically controlled processing unit, is equipped with the inlet channel who supplies compressed air to get into in the lower part of air dryer assembly, and compressed air gets into each gas receiver through the gas outlet of air dryer assembly lower part after inlet channel through the drying cylinder drying of air dryer assembly, and the operating pressure of each gas receiver is realized the off-load or is built pressure by the control of automatically controlled processing unit. The electric control type vehicle air processing unit adopts the structural form, so the electric control type vehicle air processing unit also has the defects of large volume and high production cost. Due to the defects, the air treatment unit is only configured on large and high-end commercial vehicles or passenger cars, heavy trucks and other vehicle types at present, and many medium and light commercial vehicles, passenger cars and agricultural vehicles cannot be provided with the air treatment unit (generally replaced by unloading valves). Therefore, impurities and moisture in the compressed air cannot be treated and directly enter a pipeline of the brake system, so that brake elements in the brake systems of medium and light commercial vehicles, passenger cars and agricultural vehicles are frequently damaged, high maintenance troubles are brought to users or manufacturers, and potential safety hazards are brought to the users or the manufacturers.

In order to overcome the defects of the existing air processing unit, some solutions are proposed, for example, the invention patent with publication number CN102226454 a discloses an integrated air processing unit, which comprises a drying tank with molecular sieve, an unloading valve, a multi-loop air pressure protection valve, a back flushing device and a valve body, wherein the drying tank with molecular sieve is arranged on the side surface of the unloading valve, the unloading valve and the multi-loop air pressure protection valve are integrated in the same valve body, and the back flushing device is arranged on the unloading valve. It is integrated into a whole with the assembly of original two independent assemblies to realized the reduction of whole volume, nevertheless when realizing that the whole volume of air handling unit reduces, it has increased the degree of difficulty of installation maintenance again, be not convenient for installation and maintenance, intelligent degree is lower moreover.

Disclosure of Invention

The invention aims to provide an electric control air processing unit with a CAN function aiming at the defects of the prior art. The technical scheme adopted by the invention for realizing the aim is as follows:

an electronically controlled air handling unit with CAN functionality comprising: the electronic control unit of the ECU is provided with a sensor module and an ECU module with a CAN communication module; a circuit protection valve; and the dryer part is arranged on the other side of the loop protection valve and is also connected through a bolt, the CAN communication module CAN perform specific feedback according to the received automobile specific condition information, and the ECU electronic control unit processes air according to the information feedback received by the CAN communication module.

Preferably, the specific condition information is a vehicle speed, a power state, or a braking state.

In any of the above schemes, preferably, the loop protection valve includes an air suspension system loop, a first brake system loop, a second brake system loop, a trailer parking brake system loop, an auxiliary system loop, a first solenoid valve and a second solenoid valve for controlling system pressure and regeneration, an externally mounted valve body, and a six-loop valve body, wherein the air suspension system loop, the first brake system loop, the second brake system loop, the trailer parking brake system loop, and the auxiliary system loop are disposed in the loop protection valve body, the first solenoid valve and the second solenoid valve are mounted on one side surface of the loop protection valve body, and the externally mounted valve body and the six-loop valve body are respectively mounted on the upper end side and the lower end side of the loop protection valve body.

In any of the above schemes, preferably, the dryer portion includes a safety valve, a muffler, a pressure limiting valve, a dryer valve body connected to the loop protection valve, an external mounting flange, an exhaust device, and a drying cylinder, wherein one side of the dryer valve body is provided with a mounting surface connected to the loop protection valve body, the other side is provided with the safety valve, the safety valve is connected to the dryer valve body through a thread, one side of the dryer valve body in the other direction is provided with an air inlet and an outlet of the auxiliary system loop, the drying cylinder is arranged above the dryer valve body, the drying cylinder is connected to the dryer valve body through a thread, the pressure limiting valve is arranged below the dryer valve body, the exhaust device is arranged at one side below the dryer valve body, and the muffler is arranged below the exhaust device.

In any of the above solutions, it is preferable that no additional pressure sensor is required in the brake system first circuit, the brake system second circuit, and the trailer parking brake system circuit, and the ECU module is provided with a pressure sensor and CAN transmit pressure data through the CAN communication module.

In any of the above schemes, preferably, when the ECU detects the air pressure at the output port of the loop protection valve, the detected output air pressure is converted into a voltage and fed back to the ECU, and the ECU operates and controls the on/off of the first electromagnetic valve and the second electromagnetic valve of the electric control system through a logic program.

In any of the above schemes, preferably, when the detected pressure is greater than the preset cutoff pressure, the first electromagnetic valve works, the compressed air reaches the cavity through the passage to push the exhaust piston, so that the dryer part is unloaded, and meanwhile, the air pressure reaches the dryer part through the throttling hole and the one-way valve to recoil the drying cylinder, so that the molecular sieve in the drying cylinder is regenerated.

In any of the above schemes, preferably, when the air pressure at the output port of the loop protection valve is lower than a preset value, the ECU electronic control unit controls the air compressor through the second solenoid valve to supply air to the dryer part again.

In any of the above aspects, it is preferable that the regeneration amount can be reduced to a minimum according to the actual state of the drying cylinder; unconditional timing regeneration can be set regardless of whether the air compressor is shut off or not.

In any of the above aspects, it is preferable that all the mounting holes of the respective circuits are collectively arranged in the same direction.

In any of the above solutions, it is preferable that all the mounting orifices of the circuits are collectively disposed on the same side of the mounting valve body.

In any of the above solutions, it is preferred that the ECU parameters can be set at the customer site or at the assembly plant, and the air pressure regulation can be set at 9 to 12.5BAR.

In any of the above embodiments, it is preferred that a suitable drying performance data intermediate value for the dryer cartridge is recorded.

In any of the above aspects, it is preferable that the system pressure balance can be dynamically adjusted in a driving state.

In any of the above embodiments, it is preferable that the electric heater be eliminated by a special software operation when the temperature is 5 ℃.

The invention has the advantages or beneficial effects of reducing installation parts, and is embodied in that 1) a regeneration cylinder is not required to be arranged for system regeneration, so that the regeneration cylinder, a bracket, an air pipe, a pipe connector and the like which are connected with the regeneration cylinder are not required to be additionally arranged, and the space occupied by the air treatment unit is also reduced; 2) The first loop of the brake system, the second loop of the brake system and the loop of the trailer parking brake system do not need additional pressure sensors, the ECU module is internally provided with the pressure sensor and CAN transmit pressure data through the CAN communication module, and the electronic control air processing unit (E-APU) with the CAN function CAN perform corresponding feedback (such as: vehicle speed, power state, brake state), the ECU processes the air according to the information feedback received by the CAN communication module.

The invention has the advantages or beneficial effects of convenient installation, and is embodied in that 1) all the installation orifices are intensively arranged in the same direction, namely, the outlet holes of the first loop of the braking system, the second loop of the braking system, the loop of the trailer parking braking system, the loop of the auxiliary system and the loop of the air suspension system are intensively arranged on the same side of the externally installed valve body, so that the installation is very convenient, and meanwhile, the maintenance is also convenient; 2) Can be provided separately for use on trucks and buses, and the ECU parameters can be set at the customer site or at the assembly plant, for example, the barometric pressure adjustment can be set at 9 to 12.5BAR.

The invention has intelligent regeneration function, which is reflected in 1) according to the actual state of the drying cylinder, the regeneration amount can be reduced to the minimum; unconditional timing regeneration can be set whether the air compressor is cut off or not; 2) Maintaining optimum drying efficiency: the drying cylinder can record a proper drying performance data intermediate value, the specific use amount of air can be known, and the like, the regeneration is the most perfect, and the regeneration is repeated from a long-term air supply stage to the optimal state of the recovery dryer.

The intelligent control system has the beneficial effects of intelligently controlling the air compressor, and is embodied in that 1) the energy is greatly saved: the system can dynamically adjust the pressure balance of the system in a driving state, and the cut-off pressure is not unconditional maximum pressure; 2) General performance improvement: the air inlet temperature of the dryer can be reduced by optimally controlling the air compressor, so that the service life of the dryer is prolonged, the drying performance is improved, the temperature is below 5 ℃, and the electric heater can be cancelled through special software operation.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of an air handling unit of the present invention;

FIG. 2 is a schematic cross-sectional view of the preferred embodiment shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the internal configuration of the preferred embodiment circuit protection valve of FIG. 1;

fig. 4 is a schematic diagram of the operation of the preferred embodiment shown in fig. 1.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view showing a preferred embodiment of the air handling unit of the present invention; FIG. 2 is a schematic cross-sectional view of the preferred embodiment shown in FIG. 1; FIG. 3 is a schematic cross-sectional view of the internal configuration of the preferred embodiment circuit protection valve of FIG. 1; fig. 4 is a schematic diagram of the operation of the preferred embodiment shown in fig. 1.

As shown in fig. 1: the electronic air handling unit in this example comprises: an ECU electronic control unit 13, a circuit protection valve 14, and a dryer portion 15, wherein the ECU electronic control unit 13 is provided on one side of the circuit protection valve 14 and connected by a bolt, and the dryer portion 15 is provided on the other side of the circuit protection valve 14 and also connected by a bolt. The ECU 13 includes a sensor module 38, an ECU module 39 with a CAN communication module. The circuit protection valve 14 comprises an air suspension system circuit 25, a brake system first circuit 21, a brake system second circuit 22, a trailer parking brake system circuit 23, an auxiliary system circuit 24, a first electromagnetic valve 7 and a second electromagnetic valve 8 for controlling system pressure and regeneration, an externally mounted valve body 19 and a six-circuit valve body 27, wherein the air suspension system circuit 25, the brake system first circuit 21, the brake system second circuit 22, the trailer parking brake system circuit 23 and the auxiliary system circuit 24 are arranged in the circuit protection valve body, the first electromagnetic valve 7 and the second electromagnetic valve 8 are mounted on one side face of the circuit protection valve body, and the externally mounted valve body 19 and the six-circuit valve body 27 are respectively mounted on the upper end side and the lower end side of the circuit protection valve body. The dryer part 15 comprises a safety valve 18, a silencer 16, a pressure limiting valve 17, a dryer valve body 20 connected with a loop protection valve, an external mounting flange 26 and an exhaust device 32, wherein one side of the dryer valve body 20 is provided with a mounting surface connected with the loop valve body, the other side of the dryer valve body is provided with the safety valve 18, the safety valve 18 is connected to the dryer valve body 20 through threads, one side of the dryer valve body 20 in the other direction is provided with an air inlet 1.1 and an outlet 24.3 of an auxiliary system loop 24, a drying cylinder is arranged above the dryer valve body 20 and is connected with the dryer valve body 20 through threads, the pressure limiting valve 17 is arranged below the dryer valve body 20, the exhaust device 32 is arranged on one side below the valve body, and the silencer 16 is arranged below the exhaust device 32.

All the mounting openings are arranged in the same direction in a concentrated manner, i.e. the outlet openings 21.1, 21.2, 21.3, 22.1, 22.2, 23.1, 23.2, 24.1, 24.2, 25.1, 25.2 of the first brake system circuit 21, the second brake system circuit 22, the trailer parking brake system circuit 23, the auxiliary system circuit 24, the air suspension system circuit 25 are arranged in a concentrated manner on the same side of the mounting valve body 19, which arrangement saves space for piping installation, further reduces the overall occupied volume of the entire air handling unit, and facilitates mounting and maintenance.

The braking system first loop 21, the braking system second loop 22 and the trailer parking braking system loop 23 do not need extra pressure sensors, and the ECU module is provided with the pressure sensors and CAN transmit pressure data through the CAN communication module: the electronic control air processing unit (E-APU) with the CAN function CAN perform corresponding feedback (such as vehicle speed, power state and braking state) according to different received condition information of the vehicle through the CAN communication module, namely, the E-APU performs specific feedback according to the vehicle specific condition information received by the CAN communication module, and the ECU electronic control unit processes air according to the information feedback received by the CAN communication module.

The ECU parameters can be set at the customer site or at the assembly plant, for example, the air pressure adjustment can be set at 9 to 12.5BAR, so that the air pressure adjusting device can be used on trucks and buses and has wide application.

The working principle of the electric control air processing unit with the CAN function is as follows:

compressed air from the air compressor enters the cavity A through an air inlet 1.1 of the electronic air processing unit, and at the moment, due to temperature reduction, condensed water can be generated and flows to the exhaust cavity B. Meanwhile, the compressed air passes through the drying cylinder 12, impurities and moisture are removed and attached to the molecular sieve of the drying cylinder 12, one part of the dried compressed air passes through the one-way valve J, reaches the loop protection valve body M and the N cavity through the channel L, the other part of the dried compressed air reaches the dryer valve body K cavity, and the compressed air after pressure limiting reaches the G cavity and the F cavity through the channel E. When the compressed air in the chamber M overcomes the spring force of the outlet of the air suspension system loop 25, the valve is opened, and the compressed air flows to the outlets 25.1 and 25.2, and similarly, when the compressed air in the chamber N overcomes the spring force of the outlets of the braking system first loop 21 and the braking system second loop 22, the outlet valves of the loops are opened respectively. Compressed air flows to outlets 21.1, 21.2, 21.3 and 22.1, 22.2 respectively; similarly, when the compressed air from chamber F overcomes the spring force at the outlet of the auxiliary system circuit 24, the valve is opened and compressed air flows to the outlets 24.1 and 24.2. A small part of the compressed air from the outlet of the first brake system circuit 21 is communicated to the cavity P through the throttling hole 30, a small part of the compressed air from the outlet of the second brake system circuit 22 is communicated to the cavity Q through the throttling hole, when the air pressures of the outlet of the first brake system circuit 21 and the outlet of the second brake system circuit 22 reach the pressure value overcoming the spring 5, a valve communicated to the outlet of the trailer parking brake system circuit 23 is opened, and the compressed air from the cavity G is communicated to the outlets 23.1 and 23.2 through the valve.

When the ECU electronic control unit 13 detects the air pressure at the output port of the loop protection valve, namely, the air pressure at the output ports of the first loop 21 and the second loop 22 of the braking system, the detected output air pressure is converted into voltage and fed back to the ECU electronic control unit 13, the ECU electronic control unit 13 controls the on-off of the first electromagnetic valve 7 and the second electromagnetic valve 8 of the electronic control system through logic program operation, when the detected pressure is larger than a preset cut-off pressure, the first electromagnetic valve 7 works, compressed air reaches the cavity 10 through the channel 9 to push the exhaust piston 11 to unload the dryer, meanwhile, the air pressure reaches the dryer backflushing drying cylinder 12 through the throttling hole 34 and the one-way valve 35 to regenerate the molecular sieve in the drying cylinder 12, and when the air pressure at the output port of the dryer is lower than a preset value, the ECU electronic control unit 13 controls the air compressor through the second electromagnetic valve 8 to supply air to the dryer again. The process completely realizes the processes of unloading, backflow backflushing regeneration and re-air supply of the compressed air dryer.

The regeneration cylinder is not required to be arranged for regenerating the system, so that the regeneration cylinder, a bracket, an air pipe, a pipe joint and the like which are connected with the regeneration cylinder are not required to be additionally arranged, and the space occupied by the air treatment unit is reduced. The automobile seat frame is convenient to use on more vehicles, reduces assembly processes and reduces labor intensity of workers.

The electric control air processing unit with the CAN function has a good intelligent regeneration function.

According to the actual state of the drying cylinder, the regeneration amount can be reduced to the minimum; unconditional timing regeneration can be set whether or not the air compressor is shut off.

Maintaining optimal drying efficiency: the method can record a possible drying performance data intermediate value of the drying cylinder, know the specific use amount of air and the like, and the regeneration is the most perfect; the optimal state for restoring the dryer during the long air supply period is to repeat the regeneration.

The electric control air processing unit with the CAN function CAN intelligently control the air compressor. The system has the advantages that energy is saved, the pressure balance of the system can be dynamically adjusted in a driving state, and the cut-off pressure is not unconditional maximum pressure; furthermore, some properties are improved, for example, by optimally controlling the air compressor, the inlet air temperature of the dryer can be reduced, thereby prolonging the service life of the dryer and simultaneously improving the drying performance. Furthermore, when the temperature is below 5 ℃, the electric heater can be cancelled through special software calculation.

The above-described embodiment is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatically controlled air handling unit of taking CAN function, its characterized in that includes: an ECU electronic control unit (13), in which ECU electronic control unit (13) a sensor module (38) and an ECU module (39) with a CAN communication module are provided; a circuit protection valve (14); the ECU (13) is arranged on one side of the loop protection valve (14) and is connected through a bolt, the dryer (15) is arranged on the other side of the loop protection valve (14) and is also connected through a bolt, the CAN communication module CAN perform specific feedback according to received information of specific conditions of the automobile, and the ECU (13) processes air according to the information feedback received by the CAN communication module; the dryer part (15) comprises a safety valve (18), a silencer (16), a pressure limiting valve (17), a dryer valve body (20) connected with the loop protection valve (14), an external mounting flange (26), an exhaust device (32) and a drying cylinder (12), wherein one side of the dryer valve body (20) is provided with a mounting surface connected with the loop protection valve body, the other side of the dryer valve body is provided with the safety valve (18), the safety valve (18) is connected with the dryer valve body (20) through threads, one side of the dryer valve body (20) in the other direction is provided with an air inlet (1.1) and an outlet (24.3) of an auxiliary system loop (24), the drying cylinder (12) is arranged above the dryer valve body (20), the drying cylinder (12) is connected with the dryer valve body (20) through threads, the pressure limiting valve (17) is arranged below the dryer valve body (20), the exhaust device (32) is arranged on one side below the dryer valve body (20), and the silencer (16) is arranged below the exhaust device (32); the specific condition information is vehicle speed, power state or braking state.

2. The CAN-capable electronically controlled air handling unit according to claim 1, wherein the circuit protection valve (14) comprises an air suspension system circuit (25), a first brake system circuit (21), a second brake system circuit (22), a trailer parking brake system circuit (23), an auxiliary system circuit (24), first and second solenoid valves (7, 8) for controlling system pressure and regeneration, an externally mounted valve body (19), and a six-circuit valve body (27), wherein the air suspension system circuit (25), the first brake system circuit (21), the second brake system circuit (22), the trailer parking brake system circuit (23), and the auxiliary system circuit (24) are disposed in a circuit protection valve body, the first and second solenoid valves (7, 8) are mounted on one side of the circuit protection valve body, and the externally mounted valve body (19), and the six-circuit valve body (27) are mounted on the upper and lower end sides of the circuit protection valve body, respectively.

3. The CAN-capable electronically controlled air handling unit of claim 2, wherein the brake system first circuit (21), the brake system second circuit (22), the trailer parking brake system circuit (23) do not require additional pressure sensors.

4. The CAN-capable electronic control air handling unit according to claim 3, wherein when the ECU electronic control unit (13) detects air pressure at the outlet of the circuit protection valve, the detected output air pressure is converted into a voltage and fed back to the ECU electronic control unit (13), and the ECU electronic control unit (13) controls the on/off of the first solenoid valve (7) and the second solenoid valve (8) through logic program operation.

5. A CAN-enabled electronically controlled air handling unit according to claim 4, wherein when the sensed pressure is greater than a predetermined cut-off pressure, the first solenoid valve (7) is operated to release the pressure of the air to the chamber (10) via the passage (9) to push the exhaust piston (11) to unload the dryer section (15), and simultaneously, the air pressure to the dryer section (15) via the orifice (34), the check valve (35) to backflush the drying cylinder (12) to regenerate the molecular sieve in the drying cylinder (12).

6. The CAN-capable, electronically controlled air handling unit according to claim 2, characterized in that the ECU electronic control unit (13) controls the air compressor via the second solenoid valve (8) to re-supply air to the dryer section (15) when the air pressure at the outlet of the circuit protection valve is below a preset value.

7. The CAN-capable electronically controlled air handling unit according to claim 1, wherein the amount of regeneration CAN be minimized depending on the actual state of the drying cylinder (12); unconditional timing regeneration can be set whether or not the air compressor is shut off.

8. The CAN-capable electronically controlled air handling unit of claim 2, wherein all of the mounting apertures of each circuit are collectively disposed in the same direction.

9. Electronically controlled air handling unit with CAN function according to claim 8, characterized in that all mounting apertures of the circuits are arranged centrally on the same side of the externally mounted valve body (19).

10. The CAN-capable electronically controlled air handling unit of claim 1, wherein the ECU parameters CAN be set at a customer site or at an assembly plant, and the air pressure adjustment CAN be set at 9 to 12.5BAR.