Air inlet and cooling active guarantee system for plateau diesel engine

Abstract

The invention discloses a plateau diesel engine air inlet and cooling active guarantee system, and relates to the technical field of automobile engine modification. The turbocharger is mounted on the diesel engine body; the oxygenation device is arranged on one side of the turbocharger, an air inlet pipe of the oxygenation device is connected with the air outlet end of the turbocharger, and the air outlet end of the oxygenation device is connected to an air inlet manifold of the diesel engine body through an air inlet pipeline; the oxygen concentration sensor is mounted on the gas inlet pipeline or the oxygenation device and is used for detecting the oxygen concentration of flowing gas; the air filter is mounted at the air inlet end of the turbocharger; the electronic control unit cooperatively controls the oxygen supply amount of the oxygenation device and the start and stop of the electronic auxiliary water pump according to the oxygen concentration and the cooling liquid temperature signal, so that sufficient oxygen concentration of inlet air of the engine and efficient heat dissipation are actively guaranteed in the plateau environment, and the dynamic property and the heat balance of the engine are improved.

Description

Technical Field

[0001] This invention relates to the field of automotive engine modification technology, specifically to an active protection system for intake and cooling of diesel engines used in high-altitude areas. Background Technology

[0002] When driving in high-altitude areas, diesel engines face two major challenges: First, insufficient air intake due to thin air and low oxygen content leads to reduced combustion efficiency and a significant decrease in engine power. Second, the reduced atmospheric pressure lowers the boiling point of the coolant, resulting in insufficient heat dissipation capacity of traditional cooling systems and a tendency for the engine to overheat.

[0003] In existing technologies, engine modifications are typically employed to address high-altitude environments. For example, a turbocharger is added to the intake system to increase intake pressure, or the radiator is modified or an electric fan is added to enhance cooling capacity. While these improvements alleviate individual problems to some extent, they lack a systematic and synergistic design. For instance, while adding a turbocharger increases intake volume, it doesn't solve the problem of low oxygen levels in the air. Furthermore, the compression process generates additional heat, which, given the already limited cooling capacity at high altitudes, may further burden the cooling system, increasing the risk of engine overheating under extreme altitudes or high-load conditions. Summary of the Invention

[0004] The purpose of this invention is to provide an active protection system for the intake and cooling of diesel engines used in high-altitude environments. This system addresses the problem that existing improvements are often isolated and partial modifications that lack systematic coordination. As a result, the intake oxygen content and heat dissipation requirements are mutually constrained, making it impossible to effectively and reliably ensure both engine power and thermal balance in high-altitude environments.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an active protection system for intake and cooling of a diesel engine used in high-altitude areas, including a diesel engine body;

[0006] A turbocharger is mounted on the diesel engine body;

[0007] An oxygenation device is installed on one side of the turbocharger, with its intake pipe connected to the outlet end of the turbocharger and its outlet end connected to the intake manifold of the diesel engine body through an intake pipe.

[0008] An oxygen concentration sensor is installed on the air intake pipe or the oxygenation device to detect the oxygen concentration of the gas flowing through it.

[0009] An air filter is installed at the intake end of the turbocharger;

[0010] An electronic control unit, electrically connected to the oxygen concentration sensor, is used to control the operation of the oxygenation device based on the signal from the oxygen concentration sensor.

[0011] An all-aluminum flat tube radiator is used to replace the original radiator of the diesel engine body and is connected to the engine cooling circulation pipeline.

[0012] A high-pressure water tank cover is installed at the pressure cover mounting port of the all-aluminum flat tube radiator.

[0013] An electronic auxiliary water pump is connected in series in the coolant pipeline between the cylinder water jacket of the diesel engine body and the all-aluminum flat tube radiator;

[0014] A temperature sensor is installed on the pipeline of the electronically assisted water pump to detect the temperature of the coolant.

[0015] The electronic control unit is also electrically connected to the temperature sensor and is used to control the start and stop of the electronic auxiliary water pump based on the signal from the temperature sensor.

[0016] Furthermore, the oxygenation device is a vehicle-mounted molecular sieve oxygen generator, whose oxygenation core includes at least two molecular sieve adsorption towers. The electronic control unit controls the molecular sieve adsorption towers to alternately perform adsorption and regeneration operations to achieve continuous oxygen supply.

[0017] Furthermore, the electronic control unit is configured to: when the oxygen concentration detected by the oxygen concentration sensor is lower than a first threshold, control the molecular sieve oxygen generator to supply oxygen at a basic flow rate; when the detected oxygen concentration is continuously lower than a second threshold of the first threshold and the load signal transmitted by the engine is higher than the set load, control the molecular sieve oxygen generator to increase the oxygen supply to the rated maximum flow rate.

[0018] Furthermore, the diesel engine body is mounted on a base, a reinforcing plate is welded on the base, a support plate is provided on the top of the reinforcing plate, the oxygenation device is mounted on the top of the support plate, the support plate is provided with spaced guide holes along its length, the bottom of the oxygenation device is provided with a guide plate that cooperates with the guide holes, after the oxygenation device is connected to the turbocharger, the oxygenation device is locked on the support plate by a locking member.

[0019] Furthermore, the turbocharger has a first connector at the outlet end and the oxygenation device has a second connector at the intake pipe. The outer walls of both the first and second connectors are threaded. The second connector has a tapered mating part formed on the inner side of one end facing the first connector. A rubber sealing ring is provided in the mating part.

[0020] Furthermore, the first connector is composed of two coaxial rings with different diameters, wherein the smaller diameter ring is adapted to be inserted into the second connector and fits against the rubber sealing ring;

[0021] It also includes a locking ring, which engages with the threaded portion of the outer wall of the second connector. When the first connector and the second connector are mated, the locking ring is tightened to force it to press against the large-diameter ring end face of the first connector, thereby locking the connection between the two.

[0022] Furthermore, a water-cooled intercooler is connected in series in the intake pipe between the outlet of the oxygenation device and the intake manifold of the engine. The cooling water circuit of the water-cooled intercooler is connected to the main or bypass cooling circulation circuit of the engine.

[0023] Furthermore, the core of the all-aluminum flat tube radiator is composed of multiple rows of flat tubes and corrugated heat dissipation fins; the high-pressure water tank cover is a cover with a two-way pressure valve, the positive pressure opening pressure value is 1.3-1.4 bar, and the negative pressure opening pressure value is -0.05 to -0.1 bar.

[0024] Furthermore, a one-way valve is connected in parallel to the electronic auxiliary water pump. The opening direction of the one-way valve is consistent with the pumping direction when the electronic auxiliary water pump is started. When the electronic auxiliary water pump is not started, the coolant is allowed to pass normally under the drive of the engine mechanical water pump.

[0025] A cooperative control method for the above system includes the following steps:

[0026] S1: Real-time monitoring of intake air oxygen concentration, engine coolant temperature, engine speed, and load signals;

[0027] S2: Compare the monitored intake oxygen concentration with the preset target oxygen concentration range. If it is lower than the lower limit of the range, start the oxygenation device and calculate the required oxygen supply compensation based on the current oxygen concentration deviation and engine operating conditions.

[0028] S3: Compare the monitored coolant temperature with the preset start-up temperature threshold. If the temperature is higher than the start-up temperature threshold, start the electronic auxiliary water pump.

[0029] S4: Dynamically adjust the oxygen supply compensation and the speed of the electronic auxiliary water pump based on the real-time load and speed of the engine; wherein,

[0030] When the engine is under high load and high speed, even if the intake oxygen concentration is not lower than the lower limit of the range, the oxygenation device is controlled to provide preventive supplemental oxygen supply.

[0031] At the same time, based on the operating status and oxygen supply of the oxygenation device, the target value for controlling the rotational speed of the electronic auxiliary water pump is increased accordingly.

[0032] Compared with existing technologies, the active intake and cooling protection system for diesel engines used in high-altitude environments provided by this invention integrates an active intake compensation subsystem containing an oxygenation device with an active cooling control subsystem containing an electronically assisted water pump and an enhanced radiator, all managed collaboratively by a unified electronic control unit. This constitutes a systematic solution for high-altitude environments. This solution not only directly increases the absolute oxygen content in the intake air through the oxygenation device, alleviating combustion degradation and power reduction caused by thin air, but also effectively addresses the performance degradation of the cooling system due to reduced atmospheric pressure and prevents engine overheating by enhancing heat dissipation and active circulation control. The two subsystems work collaboratively under the unified decision-making of the electronic control unit, dynamically adjusting the oxygen supply and cooling intensity based on real-time intake oxygen concentration and coolant temperature signals. This achieves coordinated and proactive protection of the two key requirements of engine intake and cooling, overcoming the drawbacks of fragmented or even mutually restrictive partial modification measures in existing technologies. It improves the power performance, thermal balance reliability, and environmental adaptability of diesel engines under complex high-altitude conditions. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0034] Figure 1 A schematic diagram of the overall structure of the active air intake and cooling protection system for a high-altitude diesel engine provided in this embodiment of the invention. Figure 1 ;

[0035] Figure 2 A schematic diagram of the overall structure of the active air intake and cooling protection system for a high-altitude diesel engine provided in this embodiment of the invention. Figure 2 ;

[0036] Figure 3 This is a schematic diagram of the structure of components such as the turbocharger and oxygenation device provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the oxygenation device and water-cooled intercooler provided in the embodiments of the present invention;

[0038] Figure 5 This is a cross-sectional view of the fixed state structure of the first connector and the second connector, etc., provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of components such as the electronic auxiliary water pump and the all-aluminum flat tube heat sink provided in the embodiments of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Diesel engine block; 2. Turbocharger; 3. Oxygen supply device; 4. Intake pipe; 5. Intake manifold; 6. Oxygen concentration sensor; 7. Air filter; 8. Electronic control unit; 9. All-aluminum flat tube radiator; 10. High-pressure water tank cover; 11. Electronic auxiliary water pump; 12. Temperature sensor; 13. Base; 14. Reinforcing plate; 15. Support plate; 16. Guide hole; 17. Guide plate; 18. Locking element; 19. First connector; 20. Second connector; 21. Threaded part; 22. Butt joint; 23. Rubber sealing ring; 24. Locking ring; 25. Water-cooled intercooler; 26. One-way valve. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] As attached Figure 1 To be continued Figure 6 As shown:

[0044] Example:

[0045] This invention provides an active protection system for intake and cooling of a diesel engine used in high-altitude areas, including a diesel engine body 1;

[0046] Turbocharger 2 is mounted on the diesel engine body 1;

[0047] An oxygenation device 3 is located on one side of the turbocharger 2. Its intake pipe is connected to the outlet end of the turbocharger 2, and its outlet end is connected to the intake manifold 5 of the diesel engine body 1 through an intake pipe 4.

[0048] An oxygen concentration sensor 6 is installed on the air intake pipe 4 or the oxygenation device 3 to detect the oxygen concentration of the gas flowing through it.

[0049] An air filter 7 is installed at the intake end of the turbocharger 2;

[0050] The electronic control unit 8 is electrically connected to the oxygen concentration sensor 6 and is used to control the operation of the oxygenation device 3 according to the signal from the oxygen concentration sensor 6.

[0051] An all-aluminum flat tube radiator 9 is used to replace the original radiator of the diesel engine body 1 and is connected to the engine cooling circulation pipeline.

[0052] The high-pressure water tank cover 10 is installed at the pressure cover installation port of the all-aluminum flat tube radiator 9;

[0053] The electronic auxiliary water pump 11 is serially arranged in the coolant pipeline between the cylinder block water jacket of the diesel engine body 1 and the all-aluminum flat tube radiator 9;

[0054] The temperature sensor 12 is arranged on the pipeline of the electronic auxiliary water pump 11 and is used to detect the coolant temperature;

[0055] Among them, the electronic control unit 8 is also electrically connected to the temperature sensor 12 and is used to control the start and stop of the electronic auxiliary water pump 11 according to the signal of the temperature sensor 12.

[0056] It should be noted that: By integrating the intake air active compensation subsystem including the oxygenation device 3 and the cooling active control subsystem including the electronic auxiliary water pump 11 and the enhanced radiator, and jointly managing them by the unified electronic control unit 8, a systematic solution for the plateau environment is formed. This solution not only directly increases the absolute oxygen content in the intake air through the oxygenation device 3 to alleviate the problems of deteriorated combustion and power decline caused by thin air, but also effectively responds to the decline in the cooling system efficiency caused by the decrease in atmospheric pressure through enhancing the heat dissipation capacity and active circulation control, preventing the engine from overheating. The two subsystems work together under the unified decision of the electronic control unit 8, and can dynamically adjust the oxygen supply amount and cooling intensity according to the real-time intake air oxygen concentration and coolant temperature signals, thereby realizing the linkage and active guarantee of the two key requirements of engine intake air and heat dissipation, overcoming the drawbacks of the mutually disjointed and even mutually restrictive local modification measures in the prior art, and improving the power performance, heat balance reliability and environmental adaptability of the diesel engine body 1 under complex working conditions on the plateau.

[0057] It is additionally supplemented that: The temperature sensor 12 has two trigger thresholds for controlling the electronic auxiliary water pump 11: the first threshold T1 and the second threshold T2 (T1 < T2). When the water temperature reaches T1, the electronic auxiliary water pump 11 is controlled to operate at the first speed; when the water temperature reaches T2, it is controlled to operate at a higher second speed.

[0058] In this embodiment: The oxygenation device 3 is an on-vehicle molecular sieve oxygen generator, and its oxygen generation core includes at least two molecular sieve adsorption towers. The electronic control unit 8 controls the molecular sieve adsorption towers to alternately perform adsorption and regeneration operations to achieve continuous oxygen supply.

[0059] It should be noted that the vehicle-mounted molecular sieve oxygen generator uses ambient air as feedstock. Its internal molecular sieve adsorption tower selectively adsorbs nitrogen, thus separating a high concentration of oxygen. Employing at least two adsorption towers, controlled by an electronic control unit 8 to alternate adsorption and regeneration operations, ensures a continuous and stable oxygen output, preventing supply interruptions. This method eliminates the need for carrying high-pressure oxygen cylinders, improving system safety and endurance. It directly increases the absolute number of oxygen molecules entering the engine, helping to improve combustion under high-altitude conditions. Drawing air from after the air filter 7 ensures the cleanliness of the feedstock air, and the proper placement of the nitrogen exhaust port prevents the re-inhalation of nitrogen-rich gas.

[0060] In this embodiment, the electronic control unit 8 is configured to: when the oxygen concentration detected by the oxygen concentration sensor 6 is lower than a first threshold, control the molecular sieve oxygen generator to supply oxygen at a basic flow rate; when the detected oxygen concentration is continuously lower than a second threshold of the first threshold, and the load signal transmitted by the engine is higher than the set load, control the molecular sieve oxygen generator to increase the rated maximum flow rate to supply oxygen.

[0061] It should be noted that this control strategy achieves intelligent and refined management of oxygen supply. The first threshold corresponds to the general decrease in oxygen concentration caused by altitude increase, at which point the basic flow oxygen supply is activated to maintain the engine's basic performance. The second threshold is lower and is linked to the high-load signal, corresponding to harsh operating conditions such as extreme altitudes, rapid acceleration, and hill climbing. This design can promptly provide maximum flow oxygen supplementation when the engine needs the most power and combustion demand is at its highest, helping to alleviate power decay under high-altitude conditions while avoiding energy waste caused by excessive oxygen supply at low loads.

[0062] In this embodiment: the diesel engine body 1 is mounted on the base 13, the base 13 is welded with a reinforcing plate 14, the top of the reinforcing plate 14 is provided with a support plate 15, the oxygenation device 3 is mounted on the top of the support plate 15, the support plate 15 is provided with spaced guide holes 16 along its length, the bottom of the oxygenation device 3 is provided with a guide plate 17 that cooperates with the guide holes 16, after the oxygenation device 3 is connected to the turbocharger 2, the oxygenation device 3 is locked on the support plate 15 by a locking member 18.

[0063] It should be noted that the base 13, reinforcing plate 14, and bearing plate 15 together form a stable mounting base capable of withstanding vibrations and impacts from vehicle travel, especially under off-road conditions. The guide hole 16 on the bearing plate 15 cooperates with the guide plate 17 at the bottom of the oxygenation device 3, facilitating quick and accurate pre-positioning before connecting the pipeline, thus simplifying the installation process. The locking element 18 provides final locking, ensuring the positional stability of the oxygenation device 3 during operation, preventing loosening of joints or pipeline leaks due to vibration, and improving the overall reliability of the subsystem.

[0064] In this embodiment: the outlet end of the turbocharger 2 is provided with a first connector 19, and the intake pipe of the oxygenation device 3 is provided with a second connector 20. The outer walls of the first connector 19 and the second connector 20 are both provided with threaded portions 21. The inner side of the end of the second connector 20 facing the first connector 19 is formed with a tapered mating portion 22, and a rubber sealing ring 23 is provided in the mating portion 22.

[0065] In this embodiment: the first connector 19 is composed of two coaxial rings with different diameters, wherein the smaller diameter ring is suitable for insertion into the second connector 20 and for fitting with the rubber sealing ring 23;

[0066] It also includes a locking ring 24, which engages with the threaded portion 21 on the outer wall of the second connector 20. When the first connector 19 and the second connector 20 are connected, the locking ring 24 is tightened to force it to press against the large-diameter ring end face of the first connector 19, thereby locking the connection between the two.

[0067] It should be noted that this connection structure is designed to achieve a reliable and sealed quick connection between pipelines. The tapered mating part 22 on the inner side of the second connector 20 mates with the rubber sealing ring 23, easily forming an initial seal when the small-diameter ring of the first connector 19 is inserted. The outer locking ring 24 is tightened by threads, generating axial clamping force. On the one hand, this causes the rubber sealing ring 23 to deform and fully fill the gap, ensuring a tight seal; on the other hand, it mechanically presses the end faces of the two connectors together, providing a rigid connection that resists pipeline vibration and reduces the risk of leakage at the connection point under high-frequency pulsed air pressure.

[0068] In this embodiment, a water-cooled intercooler 25 is also connected in series in the intake pipe 4 between the outlet end of the oxygenation device 3 and the intake manifold 5 of the engine. The cooling water circuit of the water-cooled intercooler 25 is connected to the main cooling circulation circuit or bypass circuit of the engine.

[0069] It should be noted that the water-cooled intercooler 25 is connected in series after the oxygenation device 3 to reduce the intake air temperature after passing through the turbocharger 2 and the oxygenation device 3. Cooling the intake air increases the intake air density, further improving the cylinder charging efficiency. Its cooling water circuit is connected to the engine cooling cycle, making the intercooler's cooling capacity part of the entire active cooling system. This helps to cope with the intake air temperature rise caused by turbocharging and altitude changes, synergistically improving the efficiency of the intake subsystem and forming a closer thermal management linkage with the cooling subsystem.

[0070] In this embodiment: the core of the all-aluminum flat tube radiator 9 is composed of multiple rows of flat tubes and corrugated heat dissipation fins; the high-pressure water tank cover 10 is a cover with a two-way pressure valve, the positive pressure opening pressure value is 1.3-1.4 bar, and the negative pressure opening pressure value is -0.05 to -0.1 bar.

[0071] It should be noted that the flat tube structure of the all-aluminum flat tube radiator 9 helps reduce coolant flow resistance, while the corrugated heat dissipation fins increase the heat dissipation area, thereby improving the radiator's heat exchange efficiency within a limited space. The high-pressure water tank cap 10 increases the positive pressure opening pressure to 1.3-1.4 bar, increasing the internal pressure of the cooling system and raising the boiling point of the coolant. This directly compensates for the decrease in boiling point caused by low atmospheric pressure in high-altitude areas, delaying coolant boiling and enhancing the system's overheat resistance. The two-way pressure valve also ensures system pressure safety. The compatibility design ensures ease of modification and replacement.

[0072] In this embodiment, a one-way valve 26 is also connected in parallel to the electronic auxiliary water pump 11. The opening direction of the one-way valve 26 is consistent with the pumping direction when the electronic auxiliary water pump 11 is started. When the electronic auxiliary water pump 11 is not started, the coolant is allowed to pass normally under the drive of the engine mechanical water pump.

[0073] It should be noted that the parallel one-way valve 26 design ensures the flexibility of the coolant circulation path. When the electronic auxiliary water pump 11 is not running, the one-way valve 26 opens under the drive of the engine's mechanical water pump, and the coolant circulates normally along the original path, with no flow resistance generated by the auxiliary water pump. When the electronic auxiliary water pump 11 starts to enhance cooling, its pumping direction is consistent with the opening direction of the one-way valve 26, jointly driving the coolant flow, enhancing the flow rate of the radiator's large circulation loop, and accelerating heat dissipation. This design avoids the electronic auxiliary water pump 11 blocking the original cooling circulation when the engine is off and reduces the parasitic power loss of the auxiliary water pump.

[0074] A cooperative control method for controlling the above-mentioned system includes the following steps:

[0075] S1: Real-time monitoring of intake air oxygen concentration, engine coolant temperature, engine speed, and load signals;

[0076] S2: Compare the monitored intake oxygen concentration with the preset target oxygen concentration range. If it is lower than the lower limit of the range, start the oxygenation device 3 and calculate the required oxygen supply compensation based on the current oxygen concentration deviation and engine operating conditions.

[0077] S3: Compare the monitored coolant temperature with the preset start-up temperature threshold. If it is higher than the start-up temperature threshold, start the electronic auxiliary water pump 11.

[0078] S4: Dynamically adjust the oxygen supply compensation amount and the speed of the electronic auxiliary water pump 11 according to the real-time load and speed of the engine; wherein,

[0079] When the engine is under high load and high speed, even if the intake oxygen concentration is not lower than the lower limit of the range, the oxygenation device 3 is controlled to provide preventive supplemental oxygen supply.

[0080] At the same time, based on the operating status and oxygen supply of the oxygenation device 3, the target value for controlling the rotational speed of the electronic auxiliary water pump 11 is correspondingly increased.

[0081] It should be noted that this method embodies the dynamic coordination between intake and cooling protection. The control strategy not only passively responds to sensor signals but also proactively anticipates demand. Preemptively supplementing oxygen supply under high load and high speed conditions prevents impending power shortages. Simultaneously, proactively increasing the target speed of the electronic auxiliary water pump 11 based on the operating status of the oxygenation device 3 (especially during high-flow oxygen supply, which may be accompanied by increased turbocharger operation and higher intake air temperature) is a proactive adjustment to cope with potentially increased heat dissipation load. This condition-linked control logic prevents the two subsystems from operating independently, instead optimizing the overall engine operation in high-altitude environments as a whole, thus improving system response speed and protection effectiveness.

[0082] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An active intake and cooling protection system for a diesel engine used in high-altitude areas, characterized in that, include: Diesel engine body (1); A turbocharger (2) is mounted on the diesel engine body (1); An oxygenation device (3) is installed on one side of the turbocharger (2), and its intake pipe is connected to the outlet end of the turbocharger (2). Its outlet end is connected to the intake manifold (5) of the diesel engine body (1) through an intake pipe (4). An oxygen concentration sensor (6) is installed on the air intake pipe (4) or the oxygenation device (3) to detect the oxygen concentration of the gas flowing through it. An air filter (7) is installed at the intake end of the turbocharger (2); An electronic control unit (8) is electrically connected to the oxygen concentration sensor (6) and is used to control the operation of the oxygenation device (3) according to the signal from the oxygen concentration sensor (6); An all-aluminum flat tube radiator (9) is used to replace the original radiator of the diesel engine body (1) and is connected to the engine cooling circulation pipeline. High-pressure water tank cover (10) is installed at the pressure cover mounting port of the all-aluminum flat tube radiator (9); An electronic auxiliary water pump (11) is connected in series in the coolant pipeline between the cylinder water jacket of the diesel engine body (1) and the all-aluminum flat tube radiator (9); A temperature sensor (12) is installed on the pipeline of the electronic auxiliary water pump (11) to detect the temperature of the coolant; The electronic control unit (8) is also electrically connected to the temperature sensor (12) and is used to control the start and stop of the electronic auxiliary water pump (11) according to the signal of the temperature sensor (12).

2. The active intake and cooling protection system for a diesel engine used in high-altitude areas according to claim 1, characterized in that, The oxygenation device (3) is a vehicle-mounted molecular sieve oxygen generator. Its oxygen generation core includes at least two molecular sieve adsorption towers. The electronic control unit (8) controls the molecular sieve adsorption towers to alternately perform adsorption and regeneration operations in order to achieve continuous oxygen supply.

3. The active intake and cooling protection system for a high-altitude diesel engine according to claim 2, characterized in that, The electronic control unit (8) is configured to: control the molecular sieve oxygen generator to supply oxygen at a basic flow rate when the oxygen concentration detected by the oxygen concentration sensor (6) is lower than a first threshold, and control the molecular sieve oxygen generator to increase to the rated maximum flow rate when the detected oxygen concentration is continuously lower than a second threshold of the first threshold and the load signal transmitted by the engine is higher than the set load.

4. The active intake and cooling protection system for a high-altitude diesel engine according to claim 1, characterized in that, The diesel engine body (1) is mounted on a base (13). A reinforcing plate (14) is welded on the base (13). A support plate (15) is provided on the top of the reinforcing plate (14). The oxygenation device (3) is mounted on the top of the support plate (15). The support plate (15) has guide holes (16) spaced apart along its length. The bottom of the oxygenation device (3) is provided with a guide plate (17) that cooperates with the guide holes (16). After the oxygenation device (3) is connected to the turbocharger (2), the oxygenation device (3) is locked on the support plate (15) by a locking member (18).

5. The active intake and cooling protection system for a high-altitude diesel engine according to claim 1, characterized in that, The turbocharger (2) has a first connector (19) at its outlet end and the oxygenation device (3) has a second connector (20) at its intake pipe. The outer walls of the first connector (19) and the second connector (20) are both provided with threaded portions (21). The second connector (20) has a tapered mating portion (22) formed on the inner side of one end facing the first connector (19). A rubber sealing ring (23) is provided inside the mating portion (22).

6. The active intake and cooling protection system for a high-altitude diesel engine according to claim 5, characterized in that, The first connector (19) is composed of two coaxial rings with different diameters, wherein the smaller diameter ring is adapted to be inserted into the second connector (20) and fits against the rubber sealing ring (23); It also includes a locking ring (24), which engages with the threaded portion (21) on the outer wall of the second connector (20). When the first connector (19) and the second connector (20) are connected, the locking ring (24) is tightened to force it to press against the large-diameter ring end face of the first connector (19), thereby locking the connection between the two.

7. The active intake and cooling protection system for a high-altitude diesel engine according to claim 1, characterized in that, In the intake pipe (4) between the outlet end of the oxygenation device (3) and the intake manifold (5) of the engine, a water-cooled intercooler (25) is also connected in series. The cooling water circuit of the water-cooled intercooler (25) is connected to the main or bypass cooling circulation circuit of the engine.

8. The active intake and cooling protection system for a high-altitude diesel engine according to claim 1, characterized in that, The core of the all-aluminum flat tube radiator (9) is composed of multiple rows of flat tubes and wavy heat dissipation fins; the high-pressure water tank cover (10) is a cover with a two-way pressure valve, with a positive pressure opening pressure of 1.3-1.4 bar and a negative pressure opening pressure of -0.05 to -0.1 bar.

9. The active intake and cooling protection system for a high-altitude diesel engine according to claim 1, characterized in that, A one-way valve (26) is also connected in parallel to the electronic auxiliary water pump (11). The opening direction of the one-way valve (26) is consistent with the pumping direction when the electronic auxiliary water pump (11) is started. When the electronic auxiliary water pump (11) is not started, the coolant is allowed to pass normally under the drive of the engine mechanical water pump.

10. A cooperative control method for controlling a system as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Real-time monitoring of intake air oxygen concentration, engine coolant temperature, engine speed, and load signals; S2: Compare the monitored intake oxygen concentration with the preset target oxygen concentration range. If it is lower than the lower limit of the range, start the oxygenation device (3) and calculate the required oxygen supply compensation based on the current oxygen concentration deviation and engine operating conditions. S3: Compare the monitored coolant temperature with the preset start-up temperature threshold. If it is higher than the start-up temperature threshold, start the electronic auxiliary water pump (11). S4: Dynamically adjust the oxygen supply compensation amount and the speed of the electronic auxiliary water pump (11) according to the real-time load and speed of the engine; wherein, When the engine is under high load and high speed conditions, even if the intake oxygen concentration is not lower than the lower limit of the range, the oxygenation device (3) is controlled to provide preventive supplemental oxygen supply. At the same time, based on the operating status and oxygen supply of the oxygenation device (3), the target value for speed control of the electronic auxiliary water pump (11) is correspondingly increased.

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