Engine air inlet supercharging system and air inlet supercharging method

Abstract

The invention discloses an engine air inlet pressurization system and method, the engine air inlet pressurization system comprises an air storage tank and a clutch type air compressor, the air storage tank is provided with an air outlet end and an air inflation end, the air outlet end passes through an air inlet pipe connected with an engine, and when a vehicle is in a low-speed high-load working condition or a medium-low-load transient working condition, the air inflation end is connected with the clutch type air compressor; air can be supplied to the air inlet pipe through the air outlet end, the air inlet amount of the engine is increased, the response speed of the engine is increased, the clutch type air compressor is provided with a clutch input end and a compressed air output end, the clutch input end has a joint state and a separation state, and the clutch type air compressor and the gearbox are connected or separated through joint and separation of the clutch input end. When the vehicle is in the braking or sliding working condition, the engine stops running, the clutch type air compressor is connected with the gearbox, the clutch type air compressor runs to inflate the air storage tank, then braking energy can be used for inflating the air storage tank, and oil consumption generated by inflating the air storage tank is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an engine air intake boosting system and an air intake boosting method. Background Art

[0002] The engine supercharging system usually adopts exhaust gas turbocharging technology, which is a technology that uses the exhaust gas generated by the engine to drive the compressor. The purpose of supercharging is to increase the engine intake volume without increasing the engine displacement, increase the engine equivalent compression ratio, and thus increase the engine power density and torque density.

[0003] Generally, turbocharged engines have insufficient boost pressure at low speeds due to insufficient exhaust gas capacity, which limits the amount of fuel injection and causes poor torque performance at low speeds, which is detrimental to the vehicle's power performance. In addition, the turbocharger has aerodynamic lag, which results in insufficient intake air under dynamic engine conditions and slow dynamic engine response. In order to accelerate the intake of the engine, some existing air supply systems assist intake through air tanks.

[0004] As the gas in the gas tank is consumed, the gas tank needs to be inflated by an air compressor. Currently, the vehicle's air system mainly drives the air compressor by consuming the engine's positive power, resulting in increased fuel consumption of the vehicle. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose an engine air intake boost system and an air intake boost method to solve the technical problem that the engine air intake boost system in the prior art mainly consumes the engine positive power for pumping air, resulting in increased engine fuel consumption.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides an engine air intake boost system, comprising: An air storage tank is provided with an air outlet and an air charging end, wherein the air outlet is used to connect to an air inlet pipe; and The clutch-type air compressor is provided with a clutch input end and a compressed gas output end. The clutch input end is used to connect to the gearbox. The clutch-type air compressor can be connected to or separated from the gearbox through the clutch of the clutch input end. The compressed gas output end is connected to the inflation end and is used to inflate the air tank through the inflation end.

[0007] In some embodiments, the inflation end includes a multi-circuit protection valve and an air dryer, the multi-circuit protection valve is connected to the air storage tank, and the air dryer is connected to the multi-circuit protection valve and the compressed gas output end.

[0008] In some embodiments, the gas outlet end includes an gas outlet pipe and a compressed gas nozzle, the gas outlet pipe is connected to the gas storage tank and the gas inlet pipe, and the compressed gas nozzle is installed on the gas outlet pipe.

[0009] In some embodiments, the air intake boost system further includes a turbocharger module, and the turbocharger module is connected to the air outlet pipe.

[0010] In some embodiments, the air intake boost system further includes a controller, which is electrically connected to the clutch input end and is used to control the clutch input end to engage according to a vehicle braking or coasting signal so that the clutch air compressor is connected to a gearbox.

[0011] In some embodiments, the gas storage tank is provided with a pressure sensor, and the controller is also electrically connected to the pressure sensor for controlling the clutch of the clutch input end through the pressure of the gas storage tank.

[0012] In a second aspect, the present invention further provides an engine intake supercharging method, which is performed by the engine intake supercharging system, comprising: When the vehicle is in a low-speed and high-load operating condition or a medium-to-low-load transient operating condition, the gas storage tank supplies gas to the intake pipe through the gas outlet; When the vehicle is in braking or coasting condition, the clutch air compressor connects the gearbox by engaging and disengaging the input end, and inflates the inflation end through the compressed gas output end.

[0013] In some embodiments, the engine intake air boosting method further includes: When the pressure sensor senses that the pressure value of the air storage tank is less than the set minimum pressure value, the controller controls the clutch input end to engage, so that the clutch air compressor is connected to the gearbox.

[0014] In some embodiments, the engine intake boost method further includes: When the pressure sensor senses that the pressure value of the air tank is greater than the set maximum pressure value, the controller controls the clutch input end to engage, so that the clutch air compressor is separated from the gearbox.

[0015] In some embodiments, the engine intake boost method further includes: When the vehicle is in a low-speed, high-load condition or a medium-to-low-load transient condition, the turbocharger module increases the engine's intake pressure through the engine exhaust.

[0016] Compared with the prior art, the engine air intake boost system provided by the present invention is provided with an air tank and a clutch air compressor. The air tank is provided with an air outlet end and an air charging end. The air outlet end is connected to the air intake pipe of the engine. When the vehicle is in a low-speed and high-load condition or a medium- and low-load transient condition, air can be supplied to the air intake pipe through the air outlet end, thereby increasing the air intake volume of the engine and improving the response speed of the engine. The clutch air compressor is provided with a clutch input end and a compressed air output end. The clutch input end has an engaged and disengaged state. The clutch input end is connected to the gearbox, and the clutch air compressor can be connected or disengaged from the gearbox by engaging and disengaging. Based on this structure, when the vehicle is in a braking or coasting condition, the engine stops running, and the clutch air compressor is connected to the gearbox. The gearbox consumes the braking energy of the entire vehicle to drive the clutch air compressor to run, thereby inflating the air tank. Then, the braking energy can be used to inflate the air tank, thereby effectively reducing the fuel consumption generated by inflating the air tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an engine air intake supercharging system provided by an embodiment of the present invention; Figure 2 is another structural schematic diagram of the engine air intake supercharging system provided by an embodiment of the present invention; Figure 3 It is a flow chart of an engine intake boosting method provided by an embodiment of the present invention.

[0018] Reference numerals in the figures: 10—gas storage tank 11—gas outlet 12—gas charging end 13—pressure sensor 20—clutch air compressor 21—clutch input 22 - compressed gas output end 30 - turbocharger module 31 - turbocharger 32—intercooler 40—controller 50—air conditioning module 51—Generator 52—Battery 53—Moving and stationary air conditioner 111—air outlet pipe 112—compressed air nozzle 121—multi-circuit protection valve 122 - air dryer 10a - transmission system 11a - engine 12a—clutch 13a—gearbox 14a—air-driven actuator 15a—Solenoid valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that the engine air intake supercharging system in the prior art mainly consumes the positive power of the engine 11a to pump air, resulting in increased fuel consumption of the engine 11a, the engine air intake supercharging system provided by the embodiment of the present invention is connected to the transmission system 10a of the vehicle, wherein, Figure 1-2 As shown, the transmission system 10a includes an engine 11a, a clutch 12a and a gearbox 13a. The engine intake boost system increases the intake pressure of the engine 11a by connecting the intake pipe of the engine 11a. At the same time, the engine intake boost system inflates the air tank 10 by utilizing the braking energy of the vehicle, thereby reducing the fuel consumption required to inflate the air tank 10.

[0021] It should be noted that the engine air intake boost system described in the present invention is used for but not limited to commercial vehicles, etc. For the convenience of explanation, in the present invention, only the application of the engine air intake boost system to a commercial vehicle is used as an example for explanation, and the principles of the application of the engine air intake boost system to other types of equipment are essentially the same as those applied to commercial vehicles, and are not described in detail here.

[0022] The engine air intake boost system provided by the embodiment of the present invention is as follows: Figure 1-2 As shown, it includes an air tank 10 and a clutch air compressor 20. The air tank 10 is provided with an air outlet 11 and an air charging end 12. The air outlet 11 is used to connect to the air inlet pipe; the clutch air compressor 20 is provided with a clutch input end 21 and a compressed air output end 22. The clutch input end 21 is used to connect to the gearbox 13a. The clutch air compressor 20 can be connected to or separated from the gearbox 13a by engaging and disengaging the clutch of the input end 21. The compressed air output end 22 is connected to the air charging end 12, and is used to inflate the air tank 10 through the air charging end 12.

[0023] Specifically, the engine intake boost system is provided with an air storage tank 10 and a clutch air compressor 20. The air storage tank 10 is provided with an outlet end 11 and an air charging end 12. The outlet end 11 is connected to the air intake pipe of the engine 11a. When the vehicle is in a low-speed and high-load working condition or a medium-to-low-load transient working condition, air can be supplied to the air intake pipe through the outlet end 11 to increase the air intake volume of the engine 11a and improve the response speed of the engine 11a. The clutch air compressor 20 is provided with a clutch input end 21 and a compressed air output end 22. The clutch input end 21 has a connection and In the disengaged state, the clutch input end 21 is connected to the gearbox 13a, and the clutch air compressor 20 can be connected or separated from the gearbox 13a by engaging and disengaging. Based on this structure, when the vehicle is in a braking or coasting condition, the engine 11a stops running, and the clutch air compressor 20 is connected to the gearbox 13a. The gearbox 13a drives the clutch air compressor 20 to operate by consuming the braking energy of the entire vehicle to inflate the air tank 10, and then the braking energy can be used to inflate the air tank 10, effectively reducing the fuel consumption generated by inflating the air tank 10.

[0024] In this embodiment, the inflation process of the gas storage tank 10 mainly includes the following working conditions: When the vehicle is in normal driving condition, in order to avoid insufficient air pressure in the air tank 10, when the internal air pressure of the air tank 10 is less than the set pressure, the clutch input end 21 of the clutch air compressor 20 is controlled to engage, the power of the engine 11a is transmitted to the gearbox 13a, and the gearbox 13a further transmits the power to the clutch air compressor 20. The clutch air compressor 20 works to inflate the air tank 10 through the charging end 12 of the air tank 10. This part of the charging process mainly consumes fuel.

[0025] When the vehicle is in the coasting condition, the clutch 12a is disengaged, the engine 11a is stopped, and the vehicle coasts with the vehicle stopped. At this time, if the internal air pressure of the vehicle's air tank 10 is less than the set maximum pressure, the clutch input end 21 of the clutch air compressor 20 is engaged, and the gearbox 13a drives the clutch air compressor 20 to work by consuming the vehicle's braking energy to pump air into the vehicle's air tank 10. This realizes the recovery of the vehicle's braking energy, and the air tank 10 can be filled without the positive work of the engine 11a. And through the recovery of braking energy, the engine can coast with the engine turned off, thereby reducing the fuel consumption of the vehicle.

[0026] When the vehicle is in braking condition, the gearbox 13a uses the braking energy of the vehicle to drive the clutch air compressor 20 to work and pump air into the vehicle air tank 10. This condition can also realize the recovery of the braking energy of the vehicle and reduce the auxiliary work of the engine 11a, thereby reducing the fuel consumption of the vehicle.

[0027] It can be understood that the gas outlet end 11 and the gas filling end 12 can be a pipe structure that can pass the gas in the gas storage tank 10 into the gas inlet pipe and fill the gas into the gas storage tank 10.

[0028] In this embodiment, after the vehicle has completed the engine 11a shutdown times significantly increased after coasting and braking energy recovery under specific working conditions, the average braking energy recovery amount is 2.2 times that of the original vehicle, and the average fuel saving rate of the vehicle can reach 5%.

[0029] In one embodiment, if Figure 1-2As shown, the charging end 12 includes a multi-circuit protection valve 121 and an air dryer 122, the multi-circuit protection valve 121 is connected to the gas tank 10, and the air dryer 122 is connected to the multi-circuit protection valve 121 and the compressed gas output end 22. Specifically, during the operation of the clutch air compressor 20, the gas can be delivered to the air dryer 122 through the compressed gas output end 22, and then the gas tank 10 of the whole vehicle is inflated through the air dryer 122 and the multi-circuit protection valve 121, so as to realize the charging of the gas tank 10, the multi-circuit protection valve 121 can protect the intake circuit, and the air dryer 122 can reduce the load of the air compressor by emptying, and there is no need to purge and discharge the clutch air compressor 20, thereby avoiding the waste of compressed air.

[0030] In one embodiment, if Figure 1-2 As shown, the air outlet end 11 includes an air outlet pipe 111 and a compressed air nozzle 112, the air outlet pipe 111 connects the air storage tank 10 and the air intake pipe, and the compressed air nozzle 112 is installed on the air outlet pipe 111. Specifically, when the engine 11a is in a transient operating state in a low-speed high-load area and a medium-low load area, and the air intake is insufficient, the compressed air nozzle 112 consumes the compressed air in the vehicle air storage tank 10, and transmits the air in the air storage tank 10 to the air intake pipe of the engine 11a through the air outlet pipe 111 at high pressure, thereby increasing the air intake of the engine 11a, which can effectively improve the efficiency and response speed of the engine 11a.

[0031] In one embodiment, if Figure 1-2 As shown, the intake boost system further includes a turbocharger module 30, which is connected to the outlet pipe 111. Specifically, when the engine 11a is in a transient operating state in a low-speed high-load area and a medium-low load area and the intake volume is insufficient, the turbocharger module 30 increases the intake pressure through the exhaust gas of the engine 11a, and works in coordination with the air storage tank 10 to provide the required intake pressure and intake volume for the engine 11a, thereby effectively improving the efficiency and response speed of the engine 11a.

[0032] In this embodiment, the turbocharger module 30 includes a turbocharger 31 and an intercooler 32. The turbocharger 31 is connected to the exhaust pipe to increase the intake pressure through the exhaust gas, and the intercooler 32 reduces the intake temperature.

[0033] It can be understood that the clutch input terminal 21 of the clutch compressor can be controlled manually or automatically by a control unit.

[0034] In one embodiment, if Figure 1-2As shown, the air intake boost system further includes a controller 40, which is electrically connected to the clutch input terminal 21, and is used to control the clutch input terminal 21 to engage according to the vehicle braking or coasting signal, so that the clutch air compressor 20 is connected to the gearbox 13a. Specifically, when the vehicle is in the coasting and braking conditions, the controller 40 controls the clutch input terminal 21 to engage according to the vehicle braking or coasting signal, and the power of the gearbox 13a can be transmitted to the clutch air compressor 20, so that the clutch air compressor 20 inflates the air storage tank 10, thereby realizing automatic inflation of the air storage tank 10 when the vehicle is in the coasting and braking conditions.

[0035] In one embodiment, in order to ensure that the internal air pressure of the gas storage tank 10 is maintained within a normal range, Figure 1-2 As shown, the air tank 10 is provided with a pressure sensor 13, and the controller 40 is also electrically connected to the pressure sensor 13, and is used to control the clutch input end 21 by the pressure of the air tank 10. Specifically, when the pressure sensor 13 senses that the internal air pressure of the air tank 10 is insufficient, the controller 40 controls the clutch input end 21 to engage, so that the clutch air compressor 20 is connected to the gearbox 13a, and the air tank 10 is inflated by the positive power of the engine 11a, so as to achieve timely inflation of the air tank 10. When the pressure sensor 13 senses that the pressure value of the air tank 10 has not reached the set maximum pressure value, and the vehicle is in a coasting or braking condition at this time, the controller 40 controls the clutch input end 21 to engage, so that the clutch air compressor 20 is connected to the gearbox 13a, and the air tank 10 is inflated by the braking energy, so as to replenish air for the air tank 10 in time. Therefore, by setting up the engaging and disengaging air compressor 20 and monitoring the pressure of the pressure sensor 13, the gas filling into the gas storage tank 10 can be controlled according to actual demand, thereby avoiding the waste of energy.

[0036] It can be understood that the engine air intake boost system can be applied to the engine transmission system 10 a of an automatic transmission or the engine transmission system 10 a of a manual transmission.

[0037] In one embodiment, if Figure 1 As shown, when the engine air intake boost system is applied to the engine transmission system 10a of the automatic transmission, when the vehicle is in a braking or coasting state, the clutch 12a is disengaged, the engine 11a is shut down, and the flameout coasting is realized. At the same time, the clutch air compressor 20 can ensure normal operation by consuming the braking energy of the whole vehicle.

[0038] In another embodiment, Figure 2As shown, when the engine air intake boost system is applied to the engine transmission system 10a of the manual transmission, the transmission system 10a is provided with an air-driven actuator 14a and a solenoid valve 15a, the air-driven actuator 14a is connected to the clutch 12a, the manual transmission is connected to the air-driven actuator 14a, and the solenoid valve 15a is connected to the air-driven actuator 14a and the air outlet pipe 111. When the vehicle is in a braking or coasting condition, the clutch 12a pedal is stepped on, the controller 40 controls the solenoid valve 15a to open, and the compressed air in the vehicle air tank 10 enters the air-driven actuator 14a after passing through the solenoid valve 15a, pushing the clutch 12a to separate; at the same time, the engine 11a is shut down to achieve flameout coasting. Under this condition, the clutch air compressor 20 can ensure normal operation by consuming the braking energy of the vehicle.

[0039] In another embodiment, Figure 1-2 As shown, the engine air intake boost system is also provided with an air conditioning module 50, which includes a generator 51, a battery 52 and a mobile air conditioning 53. The generator 51 is connected to the engine 11a, the battery 52 is connected to the generator 51, and can be charged by the generator 51. The mobile air conditioning 53 is connected to the battery 52, and can supply power to the mobile air conditioning 53. The mobile air conditioning 53 consumes the power of the battery 52 to work, which can ensure that no matter whether the engine 11a is in the working process or not, the setting of the air conditioning module 50 can ensure that the cab can still be cooled normally during the vehicle's stop and coasting process.

[0040] The embodiment of the present invention also provides an engine 11a intake boosting method, which is performed by the engine intake boosting system, such as Figure 3 As shown, including: When the vehicle is in a low-speed high-load operating condition or a medium-low load transient operating condition, the gas storage tank 10 supplies gas to the intake pipe through the gas outlet end 11; When the vehicle is in a braking or coasting condition, the clutch air compressor 20 is connected to the gearbox 13 a by engaging and disengaging the input end 21 , and inflates the inflation end 12 through the compressed gas output end 22 .

[0041] Specifically, through the above-mentioned engine 11a intake boosting method, when the vehicle is in a low-speed and high-load condition or a medium-to-low load transient condition, the air tank 10 supplies air to the intake pipe through the air outlet end 11, thereby realizing the intake boosting of the engine 11a and increasing the corresponding speed of the engine 11a. When the vehicle is in a braking or coasting condition, the engine 11a stops running, and the clutch air compressor 20 is connected to the gearbox 13a. The gearbox 13a consumes the braking energy of the entire vehicle to drive the clutch air compressor 20 to run, and inflate the air tank 10. The braking energy can then be used to inflate the air tank 10, effectively reducing the fuel consumption generated by inflating the air tank 10.

[0042] In one embodiment, the engine 11a intake boosting method further includes: When the pressure sensor 13 senses that the pressure value of the air storage tank 10 is less than the set minimum pressure value, the controller 40 controls the clutch input end 21 to engage, so that the clutch air compressor 20 is connected to the gearbox 13a.

[0043] Specifically, when the pressure sensor 13 senses that the internal air pressure of the air tank 10 is insufficient, the controller 40 controls the clutch input terminal 21 to engage, so that the clutch air compressor 20 is connected to the gearbox 13a, and the air tank 10 is inflated through the positive power of the engine 11a. The air tank 10 can be inflated in time, and the inflation of the air tank 10 can be controlled according to actual needs, thereby avoiding energy waste.

[0044] In one embodiment, the engine 11a intake boosting method further includes: When the pressure sensor 13 senses that the pressure value of the air storage tank 10 is greater than the set maximum pressure value, the controller 40 controls the clutch input end 21 to engage, so that the clutch air compressor 20 is separated from the gearbox 13a.

[0045] Specifically, when the pressure sensor 13 senses that the pressure value of the air tank 10 has not reached the set maximum pressure value, and the vehicle is in a coasting or braking condition, the controller 40 controls the clutch input terminal 21 to engage, so that the clutch air compressor 20 is connected to the gearbox 13a, and the air tank 10 is inflated through braking energy, so as to replenish air for the air tank 10 in time, thereby reducing fuel consumption.

[0046] In one embodiment, the engine 11a intake boosting method further includes: When the vehicle is in a low-speed high-load condition or a medium-low load transient condition, the turbocharger module 30 increases the intake pressure of the engine 11 a through the exhaust gas of the engine 11 a.

[0047] Specifically, the turbocharger module 30 increases the intake pressure through the exhaust gas of the engine 11a, and works in coordination with the air tank 10 to provide the required intake pressure and intake volume for the engine 11a, thereby effectively improving the efficiency and response speed of the engine 11a.

[0048] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An engine air intake boost system, characterized in that: include: The gas storage tank is provided with a gas outlet and a gas charging end, wherein the gas outlet is used to connect to the gas inlet pipe; and The clutch-type air compressor is provided with a clutch input end and a compressed gas output end. The clutch input end is used to connect to the gearbox. The clutch-type air compressor can be connected to or separated from the gearbox through the clutch of the clutch input end. The compressed gas output end is connected to the inflation end and is used to inflate the air tank through the inflation end.

2. The engine air intake boost system according to claim 1, characterized in that: The inflation end includes a multi-circuit protection valve and an air dryer. The multi-circuit protection valve is connected to the air storage tank. The air dryer is connected to the multi-circuit protection valve and the compressed gas output end.

3. The engine air intake boost system according to claim 1, characterized in that: The gas outlet end comprises a gas outlet pipe and a compressed gas nozzle, the gas outlet pipe is connected to the gas storage tank and the gas inlet pipe, and the compressed gas nozzle is installed on the gas outlet pipe.

4. The engine air intake boost system according to claim 3, characterized in that: The air intake boost system further comprises a turbocharger module, and the turbocharger module is connected to the air outlet pipe.

5. The engine air intake boost system according to claim 1, characterized in that: The air intake boost system also includes a controller, which is electrically connected to the clutch input end and is used to control the clutch input end to engage according to a vehicle braking or coasting signal, so that the clutch air compressor is connected to the gearbox.

6. The engine air intake boost system according to claim 5, characterized in that: The gas storage tank is provided with a pressure sensor, and the controller is also electrically connected to the pressure sensor for controlling the clutch of the clutch input end through the pressure of the gas storage tank.

7. An engine intake supercharging method, characterized in that: The method is implemented by the engine air intake boosting system according to any one of claims 1 to 6, comprising: When the vehicle is in a low-speed and high-load operating condition or a medium-to-low-load transient operating condition, the gas storage tank supplies gas to the intake pipe through the gas outlet; When the vehicle is in braking or coasting condition, the clutch air compressor connects the gearbox by engaging and disengaging the input end, and inflates the inflation end through the compressed gas output end.

8. The engine intake supercharging method according to claim 7, characterized in that: Also includes: When the pressure sensor senses that the pressure value of the air storage tank is less than the set minimum pressure value, the controller controls the clutch input end to engage, so that the clutch air compressor is connected to the gearbox.

9. The engine intake supercharging method according to claim 7, characterized in that: Also includes: When the pressure sensor senses that the pressure value of the air tank is greater than the set maximum pressure value, the controller controls the clutch input end to engage, so that the clutch air compressor is separated from the gearbox.

10. The engine intake supercharging method according to claim 7, characterized in that: Also includes: When the vehicle is in a low-speed, high-load condition or a medium-to-low-load transient condition, the turbocharger module increases the engine's intake pressure through the engine exhaust.

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