CN210686125U - Booster and air compressor combined auxiliary braking system - Google Patents
Booster and air compressor combined auxiliary braking system Download PDFInfo
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- CN210686125U CN210686125U CN201921137326.3U CN201921137326U CN210686125U CN 210686125 U CN210686125 U CN 210686125U CN 201921137326 U CN201921137326 U CN 201921137326U CN 210686125 U CN210686125 U CN 210686125U
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Abstract
A supercharger and air compressor combined auxiliary braking system is characterized in that an air inlet of an air compressor (13) is connected with an air inlet pipeline (12) of the air compressor, an air outlet of a dryer (15) is connected with an air storage tank (16) through a pipeline, an inlet of an air compressor clutch (20) is connected with an unloading port of the dryer (15) through an air compressor unloading pipeline (18), an electromagnetic valve (19) is arranged on the air compressor unloading pipeline (18), an air storage pressure sensor (17) is arranged on the air storage tank (16), an engine body (6) is in transmission connection with the air compressor (13) through a transmission gear (11), a supercharger turbine (8) is provided with a supercharger variable cross-section mechanism (9), and the electromagnetic valve (19), the variable cross-section mechanism (9) and the air storage pressure sensor (17) are respectively. Not only is the auxiliary braking power increased, but also the work consumed by the auxiliary braking is converted into useful pumping work, and the energy utilization rate is improved.
Description
Technical Field
The utility model relates to an auxiliary brake system, more specifically the utility model relates to a booster and air compressor machine combined auxiliary brake system that says so belongs to pressure boost internal-combustion engine energy recuperation technical field.
Background
At present, the existing commercial vehicle generally adopts exhaust brake as auxiliary brake, and the basic working principle is that an exhaust brake valve arranged in an exhaust channel is utilized to block the exhaust channel of an internal combustion engine, because of the increase of exhaust resistance, the exhaust stroke of a piston of the internal combustion engine in operation must overcome the pressure, the piston is subjected to the counter pressure of gas and is transmitted to wheels through a crankshaft and a transmission system, so that the vehicle is forced to reduce the rotating speed, and the purpose of reducing the vehicle speed in a short time is achieved. The auxiliary braking mode improves the braking capability of the vehicle and reduces the use of the service brakes, thereby reducing the abrasion and overheating of the service brakes and ensuring the traffic safety.
As the chinese utility model patent "a waste gas bypass exhaust brake system" (the publication number is CN204476572U, the publication number is 2015 year 7 month 15 days) discloses a waste gas bypass exhaust brake system, including turbo charger, exhaust brake valve, turbo charger includes interconnect's compressor, turbo charger, bypass valve, and the exhaust end of compressor communicates with each other with the intake manifold of engine body, and turbo charger's intake end, exhaust end communicate with each other with the exhaust manifold of engine body, the intake end of exhaust brake valve respectively, and the intake end, the exhaust end of bypass valve communicate with each other with the intake end, the exhaust end of exhaust brake valve respectively. The braking system can avoid the great influence of overlarge exhaust pressure on the turbocharger during auxiliary braking, so that the turbocharger is protected. However, the above-mentioned exhaust brake as the auxiliary brake method has the following disadvantages: 1. the auxiliary braking power is low, and the energy loss is caused by exhaust energy passing through the supercharger, the exhaust braking valve and the connecting pipeline, so that the braking power is reduced; especially when the internal combustion engine is in a middle-low rotating speed, the exhaust energy is low, and the auxiliary braking power is low. Meanwhile, the structure protects the supercharger, when the pressure required by the supercharger is reached, a part of exhaust energy is bypassed, and the auxiliary braking power is reduced. 2. The structure is complicated, the exhaust brake valve, the connecting pipeline and the sealing element need to be connected, the sealing leakage risk is high, and the reliability of an exhaust system is poor. The structure can avoid great influence on the turbocharger caused by overlarge exhaust pressure during auxiliary braking, the reliability of the turbocharger is influenced by rising of exhaust back pressure and exhaust temperature when the exhaust brake valve is closed, and especially the reliability of the turbocharger is influenced when the exhaust brake valve is stuck and fails.
Disclosure of Invention
An object of the utility model is to provide a booster and air compressor machine combined auxiliary brake system to the low, not enough scheduling problem of auxiliary brake power that exists among the prior art.
In order to achieve the above object, the technical solution of the present invention is: a booster and air compressor combined auxiliary brake system comprises an air filter, a booster, an intercooler, an engine air inlet connecting pipe, an engine air inlet pipe, an engine body, an engine exhaust manifold, a booster turbine, an air compressor, a dryer, an air storage tank and a whole vehicle ECU, wherein an air inlet of the air compressor is connected with an air inlet pipe of the air compressor, an air outlet of the air compressor is connected with an air inlet of the dryer through an air outlet pipe of the air compressor, an air outlet of the dryer is connected with the air storage tank through a pipeline, an inlet of an air compressor clutch in the air compressor is connected with an unloading port of the dryer through an air compressor unloading pipeline, an electromagnetic valve is arranged on the air unloading pipeline of the air compressor, an air storage pressure sensor is arranged on the air storage tank, the engine body is connected with the air compressor through, the electromagnetic valve, the variable cross-section mechanism and the gas storage pressure sensor are respectively and electrically connected with an ECU of the whole vehicle.
The vehicle speed sensor is electrically connected with an ECU of the whole vehicle respectively.
The electromagnetic valve is a normally closed electromagnetic valve.
The gas storage pressure sensor is a semiconductor piezoresistor type pressure sensor
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses booster and air compressor machine combined auxiliary brake system realizes controlling the variable cross section position of booster through controlling the variable cross section mechanism 9 of booster to remove, closes the air intake passage before the booster turbine, realizes supplementary exhaust braking, utilizes the exhaust energy of booster turbine, and brake power is high; meanwhile, the auxiliary braking power of the engine is increased through the auxiliary braking compensation of the combined air compressor system, the auxiliary braking power of the engine is further improved, and the problems of low auxiliary braking power and insufficient auxiliary braking power are solved. Meanwhile, when the air compressor is adopted for auxiliary braking, the air compressor can pump air into the air storage tank, so that the auxiliary braking power is increased, the work consumed by auxiliary braking is converted into useful pumping work, and the energy utilization rate is improved.
2. The utility model discloses well whole car ECU acquires auxiliary brake, whole car rotational speed, brake pedal position signal, controls the booster turbine that has booster variable cross section mechanism, air compressor machine combined operation braking, increases auxiliary brake power; meanwhile, intelligent control is realized, and the responsiveness and reliability of auxiliary braking are improved.
3. The utility model can reduce the exhaust brake valve, the connecting pipeline, the sealing element and the like in the existing exhaust brake structure adopting the waste gas bypass, and the exhaust energy loss at the positions without passing through the supercharger, the exhaust brake valve and the connecting pipeline; and the number of parts is reduced, the leakage risk at the joint sealing position is reduced, and the reliability of the exhaust system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, an air cleaner 1, a supercharger 2, an intercooler 3, an engine intake connecting pipe 4, an engine intake pipe 5, an engine body 6, an engine exhaust manifold 7, a supercharger turbine 8, a supercharger variable cross-section mechanism 9, an exhaust pipe 10, a transmission gear 11, an air compressor intake pipeline 12, an air compressor 13, an air compressor outlet pipeline 14, a dryer 15, an air storage tank 16, an air storage pressure sensor 17, an air compressor unloading pipeline 18, an electromagnetic valve 19, an air compressor clutch 20, a whole vehicle ECU21, an auxiliary brake relay 22, a brake pedal position sensor 23, and a vehicle speed sensor 24 are arranged.
Detailed Description
The invention is described in further detail below with reference to the following description of the drawings and the detailed description.
Referring to fig. 1, the booster and air compressor combined auxiliary brake system comprises an air filter 1, a booster 2, an intercooler 3, an engine air inlet connecting pipe 4, an engine air inlet pipe 5, an engine body 6, an engine exhaust manifold 7, a booster turbine 8, an air compressor 13, a dryer 15, an air storage tank 16 and a whole vehicle ECU 21.
Referring to fig. 1, the inlet of the supercharger turbine 8 is connected to the outlet of the engine exhaust manifold 7, and the outlet of the supercharger turbine 8 is connected to the inlet of the exhaust pipe 10. The air inlet of the air compressor 13 is connected with an air inlet pipeline 12 of the air compressor, and the air outlet of the air compressor 13 is connected with the air inlet of the dryer 15 through an air outlet pipeline 14 of the air compressor; the air outlet of the dryer 15 is connected with an air storage tank 16 through a pipeline. An inlet of an air compressor clutch 20 in the air compressor 13 is connected with an unloading port of the dryer 15 through an air compressor unloading pipeline 18, and the inlet of the air compressor clutch 20 is a signal port of the air compressor clutch 20; the engine body 6 is in transmission connection with an air compressor 13 through a transmission gear 11. An electromagnetic valve 19 is arranged on the air compressor unloading pipeline 18, an air storage pressure sensor 17 is arranged on the air storage tank 16, and a supercharger variable-section mechanism 9 is arranged on the supercharger turbine 8; the electromagnetic valve 19, the variable cross-section mechanism 9 and the gas storage pressure sensor 17 are respectively and electrically connected with the whole vehicle ECU 21. The supercharger variable cross-section mechanism 9 is electrically connected to the entire ECU21, and the supercharger variable cross-section position is controlled by controlling the movement of the supercharger variable cross-section mechanism 9.
Referring to fig. 1, further, the braking system further includes an auxiliary braking relay 22, a brake pedal position sensor 23 and a vehicle speed sensor 24, where the auxiliary braking relay 22, the brake pedal position sensor 23 and the vehicle speed sensor 24 are electrically connected to the entire vehicle ECU21 respectively, so as to obtain an auxiliary braking signal, a brake pedal signal and a vehicle speed signal.
Referring to fig. 1, specifically, the electromagnetic valve 19 is a normally closed electromagnetic valve.
Referring to fig. 1, specifically, the gas storage pressure sensor 17 is a semiconductor piezoresistor type pressure sensor.
Referring to fig. 1, in operation, after air is pressurized by an air filter 1, a supercharger 2 and a intercooler 3, the pressurized air enters an engine body 6 through an engine air inlet connecting pipe 4 and an engine air inlet pipe 5 to participate in combustion and work, and then the air is exhausted through an engine exhaust manifold 7, a supercharger turbine 8 and an exhaust pipe 10. The air storage pressure sensor 17 feeds the pressure of the air storage tank 16 back to the ECU21 of the whole vehicle, when the pressure of the air storage tank 16 is lower than a set value, the air compressor clutch 20 is engaged, the engine body 6 drives the air compressor 13 to work through the transmission gear 11, the air compressor 13 starts to work and inflate, air enters the air compressor 13 through the air compressor air inlet pipeline 12, works through the air compressor 13, inflates to the air storage tank 16 through the air compressor air outlet pipeline 14 and the dryer 15, and the air supply function of the air compressor 13 is achieved. When the pressure of the air storage tank 16 reaches a set value, the whole vehicle ECU21 controls the electromagnetic valve 19 on the air compressor unloading pipeline 18 to be opened, air enters the air compressor clutch 20 through the air compressor unloading pipeline 18, the air compressor clutch 20 is disengaged, the air compressor 13 stops running, the air compressor 13 does not work, and zero power consumption of the air compressor 13 is achieved.
Referring to fig. 1, in operation, the entire vehicle ECU21 is electrically connected with the vehicle speed sensor 24 through the auxiliary brake relay 22, the brake pedal position sensor 23 and the brake pedal position sensor to obtain an auxiliary brake signal, a brake pedal signal and a vehicle speed signal, when the vehicle is in downhill and the auxiliary brake is on (the vehicle speed is increased or unchanged and the brake pedal position is unchanged or increased), the entire vehicle ECU21 controls the supercharger variable cross-section mechanism 9 to close the exhaust gas circulation channel, so as to realize exhaust auxiliary brake; meanwhile, the whole vehicle ECU21 controls the closing of the electromagnetic valve 19 on the air compressor unloading pipeline 18, so that the air compressor clutch 20 is engaged, the air compressor 13 starts to pump air to work, the air compressor 13 is driven to work through the transmission gear 11 by utilizing the reverse dragging energy of the vehicle downhill engine under the condition of not increasing fuel consumption, the output power of the engine is further consumed, the rotating speed of the engine is reduced, the combined auxiliary braking of the supercharger 2 and the air compressor 13 is realized, and the auxiliary braking power and the braking responsiveness of the engine are effectively improved.
Referring to fig. 1, the braking system has a simple structure, realizes intelligent control of the combined auxiliary braking of the supercharger and the air compressor, and effectively improves the auxiliary braking power, the braking responsiveness and the system reliability of the internal combustion engine.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, above-mentioned structure should all be regarded as belonging to the utility model discloses a protection scope.
Claims (4)
1. The utility model provides a booster and air compressor machine combined auxiliary brake system, includes air cleaner (1), booster (2), intercooler (3), engine air inlet connecting pipe (4), engine intake pipe (5), engine body (6), engine exhaust manifold (7), booster turbine (8), air compressor machine (13), desicator (15), gas holder (16), whole car ECU (21), its characterized in that: air compressor machine (13) air inlet be connected with air compressor machine air inlet pipeline (12), air compressor machine (13) gas outlet is passed through the air compressor machine and is given vent to anger pipeline (14) and be connected with desicator (15) air inlet, desicator (15) gas outlet be connected with gas holder (16) through the pipeline, air compressor machine clutch (20) import in air compressor machine (13) is passed through air compressor machine off-load pipeline (18) and is connected with desicator (15) off-load mouth, air compressor machine off-load pipeline (18) on be provided with solenoid valve (19), gas holder (16) on be provided with gas storage pressure sensor (17), engine body (6) be connected through drive gear (11) transmission with air compressor machine (13), turbo-supercharger (8) be provided with booster variable cross section mechanism (9), solenoid valve (19), variable cross section mechanism (9), The gas storage pressure sensors (17) are respectively and electrically connected with the whole vehicle ECU (21).
2. The combined auxiliary brake system of the supercharger and the air compressor as claimed in claim 1, wherein: still include auxiliary brake relay (22), brake pedal position sensor (23) and speed of a motor vehicle sensor (24), auxiliary brake relay (22), brake pedal position sensor (23) and speed of a motor vehicle sensor (24) be connected with whole car ECU (21) electricity respectively.
3. The combined auxiliary brake system of the supercharger and the air compressor as claimed in claim 1, wherein: the electromagnetic valve (19) is a normally closed electromagnetic valve.
4. The combined auxiliary brake system of the supercharger and the air compressor as claimed in claim 1, wherein: the gas storage pressure sensor (17) is a semiconductor piezoresistor type pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137326.3U CN210686125U (en) | 2019-07-19 | 2019-07-19 | Booster and air compressor combined auxiliary braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137326.3U CN210686125U (en) | 2019-07-19 | 2019-07-19 | Booster and air compressor combined auxiliary braking system |
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| CN210686125U true CN210686125U (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921137326.3U Active CN210686125U (en) | 2019-07-19 | 2019-07-19 | Booster and air compressor combined auxiliary braking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410208A (en) * | 2019-07-19 | 2019-11-05 | 东风商用车有限公司 | A kind of booster and air compressor machine United Assistant Brake system |
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2019
- 2019-07-19 CN CN201921137326.3U patent/CN210686125U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410208A (en) * | 2019-07-19 | 2019-11-05 | 东风商用车有限公司 | A kind of booster and air compressor machine United Assistant Brake system |
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