CN113969843A - Exhaust brake system - Google Patents
Exhaust brake system Download PDFInfo
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- CN113969843A CN113969843A CN202111160324.8A CN202111160324A CN113969843A CN 113969843 A CN113969843 A CN 113969843A CN 202111160324 A CN202111160324 A CN 202111160324A CN 113969843 A CN113969843 A CN 113969843A
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- air
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- valve
- pressure
- exhaust brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
- F02D9/06—Exhaust brakes
Abstract
The invention relates to an exhaust brake system, which comprises an air compressor, a dryer, an air storage tank, a pressure accumulator and a supercharger, wherein when the system works, the air compressor is used for feeding air through an air filter and inflating the air compressor to the air storage tank, when the pressure reaches a set value, an exhaust channel communicated with the dryer is closed, air supply to the pressure accumulator is started, compressed air discharged into the atmosphere during unloading is stored in the pressure accumulator, and energy consumption during unloading of the air compressor is recovered. When the air storage tank reaches the set pressure and needs to be unloaded (discharged into the atmosphere), compressed air enters the pressure accumulator through the pressure accumulation pipeline, and the compressed air discharged into the atmosphere when being unloaded is collected through the pressure accumulator, so that the energy waste and the energy consumption are reduced, and the energy utilization rate is effectively improved.
Description
Technical Field
The invention relates to the technical field of engine exhaust braking, in particular to an exhaust braking system.
Background
The existing commercial vehicle generally adopts exhaust brake as auxiliary brake to improve the braking capability of the vehicle, and the basic working principle is to utilize an exhaust brake valve arranged in an exhaust passage to block the exhaust passage of an internal combustion engine. The exhaust stroke of the piston of the internal combustion engine in operation must overcome the pressure due to the increase of the exhaust resistance, and the piston is subjected to the counter pressure of gas and is transmitted to wheels through a crankshaft and a transmission system to force the vehicle to reduce the rotating speed, thereby achieving the purpose of reducing the vehicle speed in a short time, improving the braking capability, reducing the use of a service brake, reducing the abrasion and overheating of the service brake and ensuring the driving safety. The exhaust brake valve works by taking air from the air storage tank of the whole vehicle to drive the brake valve to operate a cylinder switch butterfly valve to realize the exhaust brake function. It has the following drawbacks: the air source of the whole vehicle air storage tank is from an air compressor, and the whole vehicle air source is used for driving a brake valve to work, so that certain power consumption of the air compressor is consumed, and energy loss is caused; the air source of the air storage tank of the whole vehicle is consumed, the braking air consumption of the whole vehicle is influenced, and the safety of the whole vehicle is influenced.
Disclosure of Invention
In order to solve the problems, the invention provides an exhaust brake system, which utilizes the unloading energy of an air compressor, intelligently controls an exhaust brake valve through a VCU (virtual vehicle Unit), realizes the auxiliary brake function, and improves the energy utilization rate under the condition of not influencing the normal air consumption of the whole vehicle.
The technical scheme adopted by the invention is as follows: an exhaust brake system, characterized in that: the air inlet of the air compressor is connected with an air filter, one path of the air outlet of the air compressor is connected with the air storage tank after passing through the dryer, the other path of the air outlet of the air compressor is connected with an exhaust brake butterfly valve through a supercharger deflation valve driving pipeline and an exhaust brake valve control cylinder after passing through the pressure accumulator, and the exhaust brake butterfly valve is connected with the supercharger;
when the air compressor works, air is fed through the air filter and pumped into the air storage tank, when the pressure reaches a set value, the air discharge channel communicated with the dryer is closed, air starts to be supplied to the pressure accumulator, compressed air discharged into the atmosphere during unloading is stored in the pressure accumulator, and energy consumption during unloading of the air compressor is recovered.
Preferably, the vehicle VCU is respectively and electrically connected with the auxiliary brake relay, the brake pedal position sensor and the vehicle speed sensor, so as to obtain an auxiliary brake signal, a brake pedal signal and a vehicle speed signal.
Further, when the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve to open the exhaust brake valve driving pipeline and drives the exhaust brake valve operating cylinder to close the exhaust brake butterfly valve, so that the exhaust auxiliary brake is realized.
Furthermore, after the brake system uses the working gas, when the pressure of the gas storage tank is smaller than a set value or the pressure of the pressure accumulator reaches a set value, the pressure accumulating pipeline is closed, the pipeline of the dryer is opened, and the gas starts to be supplied to the gas storage tank, so that the intelligent control of the air release valve of the supercharger is realized by using the energy of the air compressor during unloading under the condition that the normal gas use of the gas storage tank is not influenced.
Preferably, one path of the air outlet of the air compressor passes through the dryer through the change-over valve and then is connected with the air storage tank, and the other path of the air outlet passes through the pressure accumulator and then is connected with the air release valve actuating mechanism of the supercharger through the air release valve driving pipeline of the supercharger.
Preferably, a one-way valve is arranged on a connecting pipeline between the air compressor and the pressure accumulator, so that compressed air in unloading is stored in the pressure accumulator and cannot flow back into an exhaust pipeline of the air compressor from the pressure accumulator.
Preferably, a supercharger exhaust control valve is arranged on the supercharger exhaust valve driving pipeline.
Preferably, an exhaust brake valve control valve is provided in the exhaust brake valve drive line.
Preferably, pressure sensors are arranged on the pressure accumulator and the gas storage tank, and the exhaust brake valve control valve and the supercharger exhaust control valve are respectively and electrically connected with the VCU of the whole vehicle.
Preferably, the pressure sensor is a semiconductor piezoresistive sensor.
When the air compressor works, air is fed into the air storage tank through the air filter, when the pressure reaches a set value, the pressure sensor feeds an electric signal back to the VCU of the whole vehicle, the VCU of the whole vehicle sends the electric signal to control the change-over valve on the exhaust pipeline to open the pressure accumulation pipeline, the exhaust channel leading to the dryer is closed, air starts to be supplied to the pressure accumulator, compressed air discharged into the atmosphere during unloading is stored into the pressure accumulator, the pressure accumulation pipeline is internally provided with the one-way valve, the compressed air during unloading is guaranteed to be stored into the pressure accumulator, the compressed air cannot flow back into the exhaust pipeline of the air compressor from the pressure accumulator, and energy consumption during unloading of the air compressor is recovered. The vehicle VCU is respectively and electrically connected with the auxiliary brake relay, the brake pedal position sensor and the vehicle speed sensor, so that an auxiliary brake signal, a brake pedal signal and a vehicle speed signal are obtained, when the vehicle runs downhill and the auxiliary brake is started (the vehicle speed of the vehicle is increased or unchanged and the position of the brake pedal is unchanged or increased), the vehicle VCU20 controls the exhaust brake valve control valve to open the exhaust brake valve driving pipeline, drives the exhaust brake valve control cylinder to close the exhaust brake butterfly valve, and realizes the exhaust auxiliary brake. When the pressure of the air storage tank is smaller than a set value or the pressure of the pressure accumulator reaches a set value after the brake system works and uses air, the VCU of the whole vehicle sends an electric signal to control a change-over valve on an exhaust pipeline to close an accumulated pressure pipeline channel, a channel of the dryer is opened, and air begins to be supplied to the air storage tank. Therefore, under the condition that normal gas consumption of the gas storage tank is not influenced, intelligent control over the air release valve of the supercharger is realized by using energy of the air compressor during unloading, and the energy utilization rate and the system reliability are improved.
The beneficial effects obtained by the invention are as follows:
1. when the air storage tank reaches the set pressure and needs to be unloaded (discharged into the atmosphere), compressed air enters the pressure accumulator through the pressure accumulation pipeline, and the compressed air discharged into the atmosphere when the air is unloaded is collected through the pressure accumulator, so that the energy waste and the energy consumption are reduced, and the energy utilization rate is effectively improved.
2. According to the invention, the whole vehicle ECU acquires signals of auxiliary braking, the whole vehicle rotating speed and the brake pedal position, controls the exhaust brake valve to operate the cylinder, closes the exhaust channel of the engine, and realizes the auxiliary exhaust braking of the engine, so that the intelligent control is realized, and the responsiveness and the reliability of the auxiliary braking are improved.
Drawings
FIG. 1 is a schematic diagram of the present invention;
reference numerals: 1. an air cleaner; 2. a supercharger; 3. an intercooler; 4. an engine air inlet connecting pipe; 5. an engine intake duct; 6. an engine body; 7. an engine exhaust manifold; 8. an engine exhaust manifold; 9. an exhaust brake butterfly valve; 10. a supercharger air relief valve drive line; 11. an exhaust brake valve control valve; 12. an accumulator; 13. an accumulator pressure sensor; 14. an air compressor; 15. a one-way valve; 16. a changeover valve; 17. a dryer; 18. a gas storage tank; 19. a gas tank pressure sensor; 20. a vehicle VCU; 21. an auxiliary brake relay; 22. a brake pedal position sensor; 23. and a vehicle speed sensor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the exhaust brake system comprises an air compressor 14, a dryer 17, an air storage tank 18, a pressure accumulator 12 and a supercharger 2, wherein an air inlet of the air compressor 14 is connected with an air filter through an air compressor air inlet pipeline, one path of an air outlet of the air compressor 14 is connected with the air storage tank 18 after passing through the dryer 17 through an air compressor air outlet pipeline, the other path of the air outlet passes through the pressure accumulator 12 and is connected with an exhaust brake butterfly valve 9 through a supercharger deflation valve driving pipeline 10 and an exhaust brake valve control cylinder 8, and the exhaust brake butterfly valve 9 is connected with the supercharger 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air compressor 14 through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, an exhaust channel leading to the dryer 17 is closed, air supply to the pressure accumulator 12 is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The first embodiment is as follows: the utility model provides a brake system exhausts, includes air compressor 14, desicator 17, gas holder 18, accumulator 12 and booster 2, and the air inlet of air compressor 14 links to each other with the air filter through the air compressor machine air inlet pipeline, and one way of gas outlet of air compressor 14 is in the same place with gas holder 18 after passing through air compressor machine air outlet pipeline through desicator 17, and another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind accumulator 12, and exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air compressor 14 through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, an exhaust channel leading to the dryer 17 is closed, air supply to the pressure accumulator 12 is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal.
Example two: the utility model provides a brake system exhausts, includes air compressor 14, desicator 17, gas holder 18, accumulator 12 and booster 2, and the air inlet of air compressor 14 links to each other with the air filter through the air compressor machine air inlet pipeline, and one way of gas outlet of air compressor 14 is in the same place with gas holder 18 after passing through air compressor machine air outlet pipeline through desicator 17, and another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind accumulator 12, and exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air compressor 14 through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, an exhaust channel leading to the dryer 17 is closed, air supply to the pressure accumulator 12 is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal. When the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10, drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, and realizes exhaust auxiliary brake.
Example three: the utility model provides a brake system exhausts, includes air compressor 14, desicator 17, gas holder 18, accumulator 12 and booster 2, and the air inlet of air compressor 14 links to each other with the air filter through the air compressor machine air inlet pipeline, and one way of gas outlet of air compressor 14 is in the same place with gas holder 18 after passing through air compressor machine air outlet pipeline through desicator 17, and another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind accumulator 12, and exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air compressor 14 through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, an exhaust channel leading to the dryer 17 is closed, air supply to the pressure accumulator 12 is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal. When the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10, drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, and realizes exhaust auxiliary brake. When the pressure of the air storage tank 17 is smaller than the set value or the pressure of the accumulator 12 reaches the set value after the working air of the brake system is used, the VCU22 of the whole vehicle sends an electric signal to control the conversion valve 18 on the exhaust pipeline to close the pressure storage pipeline channel, open the channel of the dryer 17 and start to supply air to the air storage tank 18. Therefore, under the condition that normal gas consumption of the gas storage tank 17 is not influenced, the intelligent control of the exhaust brake valve control valve 11 is realized by utilizing the energy of the air compressor 14 during unloading, and the energy utilization rate and the system reliability are improved.
Example four: the utility model provides a brake system exhausts, including air compressor 14, desicator 17, gas holder 18, pressure accumulator 12 and booster 2, the air inlet of air compressor 14 links to each other with empty the straining through the air compressor machine air inlet pipeline, be equipped with change-over valve 18 (adopting two-position three-way valve) on the gas outlet pipeline of air compressor 14, the gas outlet of air compressor 14 is connected with gas holder 18 through change-over valve 18 behind desicator 17 all the way, another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind pressure accumulator 12, exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor 14 works, air is fed through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, the change-over valve 18 on the exhaust pipeline is controlled to open the pressure accumulation pipeline, the exhaust channel leading to the dryer 18 is closed, air starts to be supplied to the pressure accumulator, compressed air discharged into the atmosphere during unloading is stored in the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal. When the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10, drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, and realizes exhaust auxiliary brake. When the pressure of the air storage tank 17 is smaller than the set value or the pressure of the accumulator 12 reaches the set value after the working air of the brake system is used, the VCU22 of the whole vehicle sends an electric signal to control the conversion valve 18 on the exhaust pipeline to close the pressure storage pipeline channel, open the channel of the dryer 17 and start to supply air to the air storage tank 18. Therefore, under the condition that normal gas consumption of the gas storage tank 17 is not influenced, the intelligent control of the exhaust brake valve control valve 11 is realized by utilizing the energy of the air compressor 14 during unloading, and the energy utilization rate and the system reliability are improved.
Example five: the utility model provides a brake system exhausts, including air compressor 14, desicator 17, gas holder 18, pressure accumulator 12 and booster 2, the air inlet of air compressor 14 links to each other with empty the straining through the air compressor machine air inlet pipeline, be equipped with change-over valve 18 (adopting two-position three-way valve) on the gas outlet pipeline of air compressor 14, the gas outlet of air compressor 14 is connected with gas holder 18 through change-over valve 18 behind desicator 17 all the way, another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind pressure accumulator 12, exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air storage tank 18 through the air filter 1 by the air compressor 14, when the pressure reaches a set value, the change-over valve 18 on the exhaust pipeline is controlled to open the pressure accumulation pipeline, the exhaust channel leading to the dryer 18 is closed, air supply to the pressure accumulator is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, the one-way valve 23 is arranged on a connecting pipeline between the air compressor 14 and the pressure accumulator 12, the compressed air during unloading is guaranteed to be stored in the pressure accumulator 12 and cannot flow back into the exhaust pipeline of the air compressor 14 from the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal. When the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10, drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, and realizes exhaust auxiliary brake. When the pressure of the air storage tank 17 is smaller than the set value or the pressure of the accumulator 12 reaches the set value after the working air of the brake system is used, the VCU22 of the whole vehicle sends an electric signal to control the conversion valve 18 on the exhaust pipeline to close the pressure storage pipeline channel, open the channel of the dryer 17 and start to supply air to the air storage tank 18. Therefore, under the condition that normal gas consumption of the gas storage tank 17 is not influenced, the intelligent control of the exhaust brake valve control valve 11 is realized by utilizing the energy of the air compressor 14 during unloading, and the energy utilization rate and the system reliability are improved.
Example six: the utility model provides a brake system exhausts, including air compressor 14, desicator 17, gas holder 18, pressure accumulator 12 and booster 2, the air inlet of air compressor 14 links to each other with empty the straining through the air compressor machine air inlet pipeline, be equipped with change-over valve 18 (adopting two-position three-way valve) on the gas outlet pipeline of air compressor 14, the gas outlet of air compressor 14 is connected with gas holder 18 through change-over valve 18 behind desicator 17 all the way, another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind pressure accumulator 12, exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air storage tank 18 through the air filter 1 by the air compressor 14, when the pressure reaches a set value, the change-over valve 18 on the exhaust pipeline is controlled to open the pressure accumulation pipeline, the exhaust channel leading to the dryer 18 is closed, air supply to the pressure accumulator is started, compressed air discharged into atmosphere during unloading is stored in the pressure accumulator 12, the one-way valve 23 is arranged on a connecting pipeline between the air compressor 14 and the pressure accumulator 12, the compressed air during unloading is guaranteed to be stored in the pressure accumulator 12 and cannot flow back into the exhaust pipeline of the air compressor 14 from the pressure accumulator 12, and energy consumption during unloading of the air compressor 14 is recovered.
The pressure accumulator 12 is provided with a pressure accumulator pressure sensor 13, the gas storage tank 18 is provided with a gas storage tank pressure sensor 19, the pressure accumulator pressure sensor 13 and the gas storage tank pressure sensor 19 are both electrically connected with the VCU20 of the whole vehicle, and the pressure accumulator pressure sensor 13 and the gas storage tank pressure sensor 19 both adopt semiconductor piezoresistor type sensors.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal.
When the vehicle runs downhill and the auxiliary brake is started, the vehicle VCU20 controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10, drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, and realizes exhaust auxiliary brake. When the pressure of the air storage tank 17 is smaller than the set value or the pressure of the accumulator 12 reaches the set value after the working air of the brake system is used, the VCU22 of the whole vehicle sends an electric signal to control the conversion valve 18 on the exhaust pipeline to close the pressure storage pipeline channel, open the channel of the dryer 17 and start to supply air to the air storage tank 18. Therefore, under the condition that normal gas consumption of the gas storage tank 17 is not influenced, the intelligent control of the exhaust brake valve control valve 11 is realized by utilizing the energy of the air compressor 14 during unloading, and the energy utilization rate and the system reliability are improved.
Example seven: the utility model provides a brake system exhausts, including air compressor 14, desicator 17, gas holder 18, pressure accumulator 12 and booster 2, the air inlet of air compressor 14 links to each other with empty the straining through the air compressor machine air inlet pipeline, be equipped with change-over valve 18 (adopting two-position three-way valve) on the gas outlet pipeline of air compressor 14, the gas outlet of air compressor 14 is connected with gas holder 18 through change-over valve 18 behind desicator 17 all the way, another way is connected with exhaust brake butterfly valve 9 through booster bleed valve drive line 10 and exhaust brake valve control cylinder 8 behind pressure accumulator 12, exhaust brake butterfly valve 9 is connected with booster 2. An engine intake pipe 5 and an engine exhaust manifold 7 are arranged on the engine body 6, the engine intake pipe 5 is connected with the supercharger 2 through an engine intake connecting pipe 4 and a intercooler 3, and the engine exhaust manifold 7 is connected with the supercharger 2 through a pipeline. Air passes through the air filter 1 and the supercharger 2 and then enters an engine air inlet pipe 5 through an engine air inlet connecting pipe 4.
When the air compressor works, air is fed into the air compressor 14 through the air filter 1 and pumped into the air storage tank 18, when the pressure reaches a set value, the air storage tank pressure sensor 19 feeds an electric signal back to the VCU22 of the whole vehicle, the VCU22 of the whole vehicle sends an electric signal to control the change-over valve 18 on the exhaust pipeline to open a pressure accumulation pipeline, an exhaust channel leading to the dryer 17 is closed, air supply to the pressure accumulator 12 is started, compressed air discharged into atmosphere during unloading is stored into the pressure accumulator 12, the one-way valve 23 is arranged in the pressure accumulation pipeline, the compressed air during unloading is guaranteed to be stored into the pressure accumulator 12 and cannot flow back into the exhaust pipeline of the air compressor from the pressure accumulator 12, and energy consumption during unloading of the air compressor is recovered.
The pressure accumulator 12 is provided with a pressure accumulator pressure sensor 13, the gas storage tank 18 is provided with a gas storage tank pressure sensor 19, the pressure accumulator pressure sensor 13 and the gas storage tank pressure sensor 19 are both electrically connected with the VCU of the whole vehicle, and the pressure accumulator pressure sensor 13 and the gas storage tank pressure sensor 19 adopt semiconductor piezoresistor type sensors.
The vehicle VCU22 is respectively electrically connected with the auxiliary brake relay 21, the brake pedal position sensor 22 and the vehicle speed sensor 23, so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal.
When the auxiliary brake is turned on (the vehicle speed of the whole vehicle is increased or unchanged and the position of the brake pedal is unchanged or increased) when the vehicle goes downhill, the VCU22 of the whole vehicle controls the exhaust brake valve control valve 11 to open the exhaust brake valve driving pipeline 10 and drives the exhaust brake valve operating cylinder 12 to close the exhaust brake butterfly valve 13, so that the exhaust auxiliary brake is realized.
When the pressure of the air storage tank 17 is smaller than the set value or the pressure of the accumulator 12 reaches the set value after the working air of the brake system is used, the VCU22 of the whole vehicle sends an electric signal to control the conversion valve 18 on the exhaust pipeline to close the pressure storage pipeline channel, open the channel of the dryer 17 and start to supply air to the air storage tank 18. Therefore, under the condition that normal gas consumption of the gas storage tank 17 is not influenced, the intelligent control of the exhaust brake valve control valve 11 is realized by utilizing the energy of the air compressor 14 during unloading, and the energy utilization rate and the system reliability are improved.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.
The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.
Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.
It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another, where appropriate, without departing from the scope of the present description; the components at one end and the other end may be of the same or different properties to each other.
In describing positional relationships, for example, when positional sequences are described as being "on.. above", "over.. below", "below", and "next", unless such words or terms are used as "exactly" or "directly", they may include cases where there is no contact or contact therebetween. If a first element is referred to as being "on" a second element, that does not mean that the first element must be above the second element in the figures. The upper and lower portions of the member will change depending on the angle of view and the change in orientation. Thus, in the drawings or in actual construction, if a first element is referred to as being "on" a second element, it can be said that the first element is "under" the second element and the first element is "over" the second element. In describing temporal relationships, unless "exactly" or "directly" is used, the description of "after", "subsequently", and "before" may include instances where there is no discontinuity between steps. The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as would be well understood by those skilled in the art. Embodiments of the invention may be performed independently of each other or may be performed together in an interdependent relationship.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (10)
1. An exhaust brake system, characterized in that: the air inlet of the air compressor is connected with an air filter, one path of the air outlet of the air compressor is connected with the air storage tank after passing through the dryer, the other path of the air outlet of the air compressor is connected with an exhaust brake butterfly valve through a supercharger deflation valve driving pipeline and an exhaust brake valve control cylinder after passing through the pressure accumulator, and the exhaust brake butterfly valve is connected with the supercharger;
when the air compressor works, air is fed through the air filter and pumped into the air storage tank, when the pressure reaches a set value, the air discharge channel communicated with the dryer is closed, air starts to be supplied to the pressure accumulator, compressed air discharged into the atmosphere during unloading is stored in the pressure accumulator, and energy consumption during unloading of the air compressor is recovered.
2. The exhaust brake system according to claim 1, characterized in that: and the whole VCU is respectively and electrically connected with the auxiliary brake relay, the brake pedal position sensor and the vehicle speed sensor so as to acquire an auxiliary brake signal, a brake pedal signal and a vehicle speed signal.
3. The exhaust brake system according to claim 2, characterized in that: when the vehicle runs downhill and the auxiliary brake is started, the VCU of the whole vehicle controls the exhaust brake valve control valve to open the exhaust brake valve driving pipeline, drives the exhaust brake valve operating cylinder to close the exhaust brake butterfly valve, and realizes the exhaust auxiliary brake.
4. The exhaust brake system according to claim 3, characterized in that: when the pressure of the air storage tank is smaller than a set value or the pressure of the pressure accumulator reaches a set value after the brake system works and uses air, the pressure accumulating pipeline is closed, the pipeline of the dryer is opened, and air starts to be supplied to the air storage tank, so that the intelligent control of the air release valve of the supercharger is realized by using the energy of the air compressor during unloading under the condition that the normal air consumption of the air storage tank is not influenced.
5. The exhaust brake system according to claim 4, characterized in that: pressure sensors are arranged on the pressure accumulator and the gas storage tank, and the exhaust brake valve control valve and the supercharger exhaust control valve are electrically connected with the VCU of the whole vehicle.
6. The exhaust brake system according to claim 5, characterized in that: the pressure sensor is a semiconductor piezoresistor type sensor.
7. The exhaust brake system according to claim 1, characterized in that: one path of the air outlet of the air compressor passes through the dryer through a change-over valve and then is connected with the air storage tank, and the other path of the air outlet passes through the pressure accumulator and then is connected with the air release valve actuating mechanism of the pressure booster through a pressure booster air release valve driving pipeline.
8. The exhaust brake system according to claim 1, characterized in that: be equipped with the check valve on the connecting pipeline of air compressor machine and accumulator, in the compressed air storage to the accumulator when guaranteeing the off-load, can not follow the accumulator and flow back into in the air compressor machine exhaust pipe.
9. The exhaust brake system according to claim 1, characterized in that: and a supercharger exhaust control valve is arranged on the supercharger exhaust valve driving pipeline.
10. The exhaust brake system according to claim 1, characterized in that: and an exhaust brake valve control valve is arranged on the exhaust brake valve driving pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160324.8A CN113969843A (en) | 2021-09-30 | 2021-09-30 | Exhaust brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160324.8A CN113969843A (en) | 2021-09-30 | 2021-09-30 | Exhaust brake system |
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|---|---|
| CN113969843A true CN113969843A (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111160324.8A Pending CN113969843A (en) | 2021-09-30 | 2021-09-30 | Exhaust brake system |
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