Waterproof engine general layout structure

Abstract

The application discloses a waterproof engine general layout structure, belongs to the technical field of internal combustion engines, and is close arrangement for the layout of a 1.5L-1.6L displacement supercharged gasoline engine, and comprises a high-efficiency supercharged engine body, an air intake system, an EGR system, a cooling system and a supercharging system, and can solve the problems of easy water damage, crowded system arrangement, low integration degree and insufficient waterproof reliability of the engine under a water crossing working condition.

Description

Technical Field

[0001] This invention belongs to the field of internal combustion engine technology, and in particular to a waterproof engine general arrangement structure. Background Technology

[0002] With the rapid development of new energy vehicles, especially extended-range electric vehicles (EREVs), the engine, as a power source or auxiliary driving force, plays an increasingly important role in the vehicle. However, when vehicles operate under complex road conditions (such as heavy rain, flooded roads, and wading), the engine compartment is prone to water ingress, leading to short circuits, corrosion, blockages, and even functional failures in critical components, seriously threatening driving safety and system reliability. Existing engine waterproofing measures are mostly concentrated on local sealing treatments or additional protective cover structures, generally exhibiting problems such as fragmented waterproofing designs, lack of systematic overall layout optimization, limited wading depth, difficulty in meeting high wading level requirements, limited layout space, especially in miniaturized, compact engine compartments where it is difficult to accommodate large-size turbocharger and cooling systems, low integration, messy external piping, increased leakage risk and maintenance difficulty, high cost, and poor adaptability to vehicle layout. Therefore, there is an urgent need to propose a new engine overall layout scheme that starts from the system level, taking into account waterproofing performance, structural compactness, integration level, and vehicle adaptability, in order to solve the above-mentioned technical bottlenecks. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a waterproof engine general arrangement structure.

[0004] The aim is to address issues in existing technologies such as engine susceptibility to water ingress and damage under wading conditions, crowded system layout, low integration, and insufficient waterproof reliability. Specific technical problems include: 1. How to achieve a rational integrated layout of multiple systems such as high-efficiency supercharging system, EGR system, intercooling system, and cooling system within a limited engine compartment space; 2. How to improve the overall waterproofing capability of the engine to ensure that key components do not ingress water under conditions of deep immersion or surge impact; 3. How to reduce the impact of residual moisture after immersion on system operation through structural optimization and sealing design; 4. How to achieve flexible engine placement on different vehicle platforms to improve versatility and adaptability; 5. How to reduce the external dimensions of the engine and improve space utilization while ensuring performance.

[0005] To achieve the above objectives, a technical solution is proposed that integrates a 1.5L–1.6L high-efficiency turbocharged gasoline engine with an overall layout at an inclination angle of 0°–20°. This solution combines system integration, enhanced sealing, optimized flow channels, and upgraded waterproof structures to achieve a highly reliable, highly integrated, and highly waterproof engine assembly layout. The technical solution adopted by this invention is as follows: A waterproof engine assembly structure includes: a high-efficiency turbocharged engine body, the high-efficiency turbocharged engine body being inclined towards the exhaust side at an angle of 0° to 20°; a valve cover assembly is bolted to the upper right of the high-efficiency turbocharged engine body; a turbocharger intake pipe assembly is bolted to the valve cover assembly; an intake mixing valve is bolted to the turbocharger intake pipe assembly via an intake flange; the intake mixing valve is connected to the vehicle's intake system; a turbocharger assembly is bolted to the exhaust side of the cylinder block assembly via an outlet flange; and the turbocharger assembly is connected to... The three-way catalytic converter assembly, the electric water pump is installed at the cylinder block assembly water inlet and below the turbocharger assembly, the EGR cooler assembly is installed at the cylinder block assembly exhaust side coolant outlet, connected to the EGR valve by bolts, and draws air from the rear of the three-way catalytic converter assembly, the upper half of the intake side of the high-efficiency turbocharged engine body is equipped with the intake manifold assembly, the lower half of the intake side of the high-efficiency turbocharged engine body is equipped with the water-to-air intercooler assembly, the water-to-air intercooler assembly is connected to the intake manifold assembly through the throttle body, the front end of the high-efficiency turbocharged engine body is the turbocharger exhaust pipe assembly, and the TVD wheel cover is installed on the synchronizer chain cover assembly.

[0006] The turbocharger intake manifold assembly is covered with a soundproof cover.

[0007] The EGR system installed on the high-efficiency turbocharged engine body includes: an EGR cooler assembly, an EGR valve connecting hose, an EGR valve, an EGR valve adapter, an EGR return hose, and a small circulation return steel pipe. The EGR valve is bolted to the EGR cooler assembly, the EGR valve adapter is bolted to the EGR valve, the EGR valve connecting hose is installed on the EGR valve adapter with clamps, the EGR temperature sensor is plugged into the EGR cooler assembly, the EGR valve connecting hose is connected to the turbocharger intake manifold assembly, the EGR valve is connected to the engine cooling pipeline through the EGR return hose and the small circulation return steel pipe, and the EGR cooler assembly is fixed to the cylinder block assembly and cylinder head assembly by three brackets.

[0008] The cooling system installed on the high-efficiency turbocharged engine body includes: a water-to-intercooler assembly, an intercooler return hose assembly, an intercooler return steel pipe assembly, and an intercooler bracket. The cooling system installed on the high-efficiency turbocharged engine body is connected to the vehicle's auxiliary water tank. The intercooler return steel pipe assembly is fixed to the cylinder block assembly and is connected to the water-to-intercooler assembly return hose connector via the intercooler return hose assembly. The upper end of the water-to-intercooler assembly's outlet is connected to the throttle body. An intercooler bracket is installed below the outlet of the water-to-intercooler assembly and is fixed to the cylinder block assembly. Intake air temperature and pressure sensors are inserted into both the intake manifold assembly and the water-to-intercooler assembly.

[0009] The turbocharging system installed on the high-efficiency turbocharged engine body includes: turbocharger cooling pipes, turbocharger oil inlet pipe, turbocharger oil return pipe, turbocharger intake pipe assembly, intake mixing valve, turbocharger exhaust hose assembly, and turbocharger exhaust pipe assembly. The intake mixing valve is located at the rear end of the high-efficiency turbocharged engine body and is bolted to the turbocharger intake pipe assembly. The turbocharger intake pipe assembly is bolted to the intake port of the turbocharger assembly. The turbocharger assembly is fixed to the side of the cylinder head assembly and sealed to the cylinder head assembly with a gasket. The turbocharger assembly exhaust port connects the turbocharger exhaust hose assembly and the turbocharger exhaust pipe assembly. The turbocharger exhaust pipe assembly is connected to the intake port of the water-to-air intercooler assembly. The turbocharger is fixed to the synchronizer housing assembly with rubber gaskets. The turbocharger oil inlet pipe draws oil from the cylinder head assembly oil passage, is fixed with hollow bolts, and sealed with washers. The turbocharger oil inlet pipe is installed at the main oil passage of the cylinder block assembly and sealed with bolts and gaskets. The turbocharger cooling pipe, intercooler return water hose assembly, and intercooler return water steel pipe assembly form a secondary cooling system and are connected to the vehicle's auxiliary water tank. The turbocharger cooling pipe is connected to the water pump adapter assembly, which is connected to the electric water pump. The turbocharger cooling pipe draws water from the electric water pump and is fixedly connected to the turbocharger inlet and return water steel pipe assembly on the turbocharger assembly, and is connected to the small circulation return water steel pipe and then connected to the vehicle's heater.

[0010] The water pump adapter assembly in the high-efficiency turbocharged engine cooling system is located below the exhaust-side turbocharger assembly. The electric water pump is fixed to the cylinder block by bolts, and the water outlet adapter is located below the intake-side intake manifold assembly and connected to the cylinder block.

[0011] The turbocharger assembly includes: a turbine exhaust outlet, a turbocharger, a spring gasket, a rocker arm, a clamp, an exhaust gas inlet flange, a coolant flange, a compressor, a compressor inlet flange, an electronic actuator, and an air outlet. The turbocharger is provided with a turbine exhaust outlet. The electronic actuator and compressor are fixed by bolts and clamps. The compressor is fixed to the turbocharger by bolts. The rocker arm and spring gasket are press-fitted with an interference fit. The exhaust gas inlet flange is assembled with the cylinder head assembly. The turbine exhaust outlet is assembled with the three-way catalytic converter assembly by bolts. The turbocharger is provided with a compressor inlet flange, a coolant flange, and an air outlet for connection with the high-efficiency turbocharged engine body.

[0012] The bottom of the cylinder block assembly is provided with an oil pan assembly, an oil pump assembly, and a dual-mass flywheel assembly.

[0013] The valve cover assembly includes: an air filter nozzle, a camshaft position sensor mounting boss, an ignition coil mounting hole, a main housing, a valve cover mounting hole, a PRV valve, a filler cap, and a dipstick mounting hole. The PRV valve and the filler cap are threadedly connected to the main housing. The air filter nozzle is welded to the main housing. The main housing is provided with a camshaft position sensor mounting boss, an ignition coil mounting hole, a valve cover mounting hole, and a dipstick mounting hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a waterproof engine overall layout structure, in which the engine body is arranged at an angle to optimize the center of gravity distribution and space utilization; multiple systems are highly integrated to reduce the clutter of external connectors and pipelines; key interfaces and connection parts are equipped with multiple sealing structures to improve the waterproof level; special waterproof structural improvements are made to areas prone to water ingress, such as turbochargers, oil pans, and valve covers; and by utilizing thermal management and gas flow characteristics, water ingress is automatically discharged and evaporated to ensure rapid recovery of operation after water immersion.

[0015] 1. Excellent waterproof performance: Special sealing structure optimization for areas prone to water ingress, such as turbochargers, oil pans, and valve covers; multiple methods, including wide sealing strips + adhesive coating, spring gasket sealing, and small gap control, effectively prevent external water intrusion; combined with the thermal effect of engine operation and airflow suction, it achieves "water can be drained and water can be evaporated", ensuring rapid recovery of normal operation after water immersion.

[0016] 2. High integration and compact layout: The intercooler piping is arranged below the intake manifold, making full use of vertical space; external accessories such as wiring harness brackets, sensor brackets, and lifting lugs are integrated into the engine body, compressing the engine's length, width, and height profile; the synchronizer cover and front mount are integrated into a single design, shortening the axial dimension and improving engine bay adaptability.

[0017] 3. High system integration and convenient maintenance: The system integrates the supercharging system, EGR system, water-air cooling system, cooling system, lubrication system, and electronic fuel injection system; the pipeline routing is clear and the interfaces are standardized, which facilitates assembly and subsequent maintenance.

[0018] 4. Flexible layout and strong adaptability: The engine supports tilting at any angle within the range of 0° to 20°, and can be flexibly adjusted according to the layout requirements of the vehicle's front compartment; it is suitable for various vehicle platforms, including sedans, SUVs, and range-extended electric vehicles.

[0019] 5. Enhance vehicle wading capability and safety: The overall waterproof design meets IPX7 and above protection requirements, supporting short-term deep water immersion; significantly improving vehicle driving safety and reliability in rainy weather, wading roads, and slippery mountain environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front end of the present invention; Figure 2 This is a schematic diagram of the back end of the present invention; Figure 3 This is a schematic diagram of a turbocharger structure; Figure 4 This is a schematic diagram of the oil pan assembly structure; Figure 5 This is a schematic diagram of the valve chamber cover structure. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Combination Figure 1-5Description: A waterproof engine assembly structure includes: a high-efficiency turbocharged engine body 31, which is inclined towards the exhaust side at an angle of 0° to 20°; a valve cover assembly 2 is bolted to the upper right of the high-efficiency turbocharged engine body 31; a turbocharger intake pipe assembly 3 is bolted to the valve cover assembly 2; an intake mixing valve 17 is bolted to the turbocharger intake pipe assembly 3 via an intake flange; the intake mixing valve 17 is connected to the vehicle's intake system; a turbocharger assembly 5 is bolted to the exhaust side of the cylinder block assembly 24 via an exhaust flange; and a three-way catalytic converter assembly 30 is clamped to the turbocharger assembly 5. The electric water pump 9 is installed at the water inlet of the cylinder block assembly 24 and below the turbocharger assembly 5. The EGR cooler assembly 29 is installed at the coolant outlet on the exhaust side of the cylinder block assembly 24 and is connected to the EGR valve 40 by bolts. It draws air from the rear section of the three-way catalytic converter assembly 30. The upper half of the intake side of the high-efficiency turbocharged engine body 31 is equipped with an intake manifold assembly 13, and the lower half of the intake side of the high-efficiency turbocharged engine body 31 is equipped with a water-to-air intercooler assembly 15. The water-to-air intercooler assembly 15 is connected to the intake manifold assembly 13 through the throttle body 33 to achieve a compact design. The front end of the high-efficiency turbocharged engine body 31 is the turbocharger exhaust pipe assembly 8. The TVD wheel cover 11 is installed on the synchronizer chain cover assembly 6 to improve the engine's NVH performance.

[0023] Furthermore, the EGR cooler assembly 29 is installed at the coolant outlet on the exhaust side of the cylinder block assembly 24, and is bolted to the EGR valve 40. It draws air from the rear section of the three-way catalytic converter assembly 30, saving space and facilitating coolant circulation.

[0024] Furthermore, the high-efficiency turbocharged engine body 31 is equipped with an engine rear hanger and wiring harness bracket assembly 18.

[0025] The turbocharger intake pipe assembly 3 is covered with a soundproof cover.

[0026] The EGR system installed on the high-efficiency turbocharged engine body 31 includes: an EGR cooler assembly 29, an EGR valve connecting hose 39, an EGR valve 40, an EGR valve adapter 26, an EGR return water hose 28, and a small circulation return water steel pipe 20. The EGR valve 40 is bolted to the EGR cooler assembly 29, the EGR valve adapter 26 is bolted to the EGR valve 40, the EGR valve connecting hose 39 is installed on the EGR valve adapter 26 with clamps, the EGR temperature sensor 27 is plugged into the EGR cooler assembly 29, the EGR valve connecting hose 39 is connected to the turbocharger intake pipe assembly 3, the EGR valve 40 is connected to the engine cooling pipeline through the EGR return water hose 28 and the small circulation return water steel pipe 20, and the EGR cooler assembly 29 is fixed to the cylinder block assembly 24 and the cylinder head assembly 19 by three brackets.

[0027] Furthermore, the EGR cooler assembly 29 draws gas from the rear section of the three-way catalytic converter assembly 30, cools it through the EGR cooler assembly 29, and then detects it through the EGR temperature sensor 27. The gas then enters the turbocharger intake manifold assembly 3 through the EGR valve connecting hose 39. The EGR cooler assembly 29 draws coolant from the fourth cylinder outlet of the cylinder block assembly 24, cools the gas, and then returns it to the overall engine cooling system through the EGR return hose 28 and the small circulation return steel pipe 20.

[0028] The cooling system installed on the high-efficiency turbocharged engine body 31 includes: a water-to-intercooler assembly 15, an intercooler return hose assembly 14, an intercooler return steel pipe assembly 22, and an intercooler bracket 32. The cooling system installed on the high-efficiency turbocharged engine body 31 is connected to the vehicle's auxiliary water tank. The intercooler return steel pipe assembly 22 is fixed on the cylinder block assembly 24 and connected to the water-to-intercooler assembly 15's return water connector via the intercooler return hose assembly 14. The upper end of the water-to-intercooler assembly 15's outlet is connected to the throttle body 33. An intercooler bracket 32 ​​is installed below the outlet of the water-to-intercooler assembly 15 and is fixed on the cylinder block assembly 24. Intake air temperature and pressure sensors 34 are inserted into both the intake manifold assembly 13 and the water-to-intercooler assembly 15.

[0029] Furthermore, the cooling system also includes: an outlet steel pipe assembly 23 and a small circulation return hose 21, for connecting the cooling system.

[0030] Furthermore, the pressurized gas passes through the turbocharger outlet hose assembly 7 and the turbocharger outlet pipe assembly 8 and enters the water-to-air intercooler assembly 15 for cooling. After being detected by the intake air temperature and pressure sensor 34, the gas enters the intake manifold assembly 13 from the water-to-air intercooler assembly 15 through the throttle body 33.

[0031] The supercharging system installed on the high-efficiency supercharged engine body 31 includes: a supercharger cooling pipe 37, a supercharger oil inlet pipe 35, a supercharger oil return pipe 36, a supercharger intake pipe assembly 3, an intake mixing valve 17, a supercharger exhaust hose assembly 7, and a supercharger exhaust pipe assembly 8. The intake mixing valve 17 is located at the rear end of the high-efficiency supercharged engine body 31 and is bolted to the supercharger intake pipe assembly 3. The supercharger intake pipe assembly 3 is bolted to the intake port of the turbocharger assembly 5. The turbocharger assembly 5 is fixed to the side of the cylinder head assembly 19 and sealed to the cylinder head assembly 19 by a gasket. The exhaust port of the turbocharger assembly 5 connects the supercharger exhaust hose assembly 7 and the supercharger exhaust pipe assembly 8. The supercharger exhaust pipe assembly 8 is connected to the intake port of the water-to-air intercooler assembly 15. The turbocharger oil inlet pipe 35 is fixed to the synchronous chain cover assembly 6 with rubber gaskets. It draws oil from the oil passage of the cylinder head assembly 19, is fixed with hollow bolts, and is sealed with washers. The turbocharger oil inlet pipe 35 is installed at the main oil passage of the cylinder block assembly 24 and is sealed with bolts and gaskets. The turbocharger cooling pipe 37, the intercooler return water hose assembly 14, and the intercooler return water steel pipe assembly 22 form a secondary cooling system and are connected to the vehicle's auxiliary water tank. The turbocharger cooling pipe 37 is connected to the water pump adapter assembly 10, and the water pump adapter assembly 10 is connected to the electric water pump 9. The turbocharger cooling pipe 37 draws water from the electric water pump 9 and is fixedly connected to the turbocharger inlet and return water steel pipe assembly 4 set on the turbocharger assembly 5, and is connected to the small circulation return water steel pipe 20 to connect to the vehicle's heater.

[0032] In the cooling system of the high-efficiency turbocharged engine body 31, the water pump adapter assembly 10 is located below the exhaust-side turbocharger assembly 5. The electric water pump 9 is fixed to the cylinder block by bolts, and water enters at this position. The water outlet adapter 38 is located below the intake manifold assembly 13 on the intake side and is connected to the cylinder block, and water exits at this position.

[0033] The turbocharger assembly 5 includes: a turbine exhaust outlet 5-1, a turbocharger 5-2, a spring washer 5-3, a rocker arm 5-4, a clamp 5-5, an exhaust gas inlet flange 5-6, a coolant flange face 5-7, a compressor 5-8, a compressor inlet flange face 5-9, an electronic actuator 5-10, and an air outlet 5-11. The turbocharger 5-2 is provided with a turbine exhaust outlet 5-1. The electronic actuator 5-10 and the compressor 5-8 are fixed by bolts and clamps 5-5. The compressor 5-8 is fixed to the turbocharger 5-2 by bolts. The rocker arm 5-4 and the spring washer 5-3 are press-fitted with an interference fit, with the rocker arm surface and the bushing surface being the working surfaces, respectively, forming an elastic sealing barrier to effectively prevent water from seeping into the volute casing along the gaps between moving parts. The exhaust gas inlet flange 5-6 is assembled with the cylinder head assembly 19, and the turbine exhaust gas outlet 5-1 is assembled with the three-way catalytic converter assembly 30 by bolts. Even if a small amount of water enters, the high temperature on the surface of the turbocharger 5 after it starts working can quickly vaporize the water. The turbocharger 5-2 is provided with a compressor inlet flange face 5-9, a coolant flange face 5-7, and an air outlet 5-11 for connection with the high-efficiency turbocharged engine body 31.

[0034] The bottom of the cylinder block assembly 24 is provided with an oil pan assembly 12, an oil pump assembly 16 and a dual-mass flywheel assembly 25.

[0035] Furthermore, the oil pan assembly 12 includes: cylinder block oil pan sealing flange 12-1, rear oil seal mounting point 12-2, alternator oil pan sealing flange 12-3, bleed screw 12-4, engine support surface 12-5, oil filter mounting flange 12-6, compressor bracket mounting point 12-7, suspension mounting point 12-8, drain bolt 12-9, engine support point 12-10, and oil pan housing 12-11. The sealing band of the alternator oil pan sealing flange 12-3 is wider than 5mm, and the sealing surface is coated with high-temperature resistant sealant to achieve double water leakage prevention; the rear oil seal mounting point 12-2 is located inside the sealing band of the alternator mating surface, completely preventing external water from entering the engine interior.

[0036] The valve cover assembly 2 includes: an air filter nozzle 2-1, a camshaft position sensor mounting boss 2-2, an ignition coil mounting hole 2-3, a main housing 2-4, a valve cover mounting hole 2-5, a PRV valve 2-6, an oil filler cap 2-7, and an oil dipstick mounting hole 2-8. The PRV valve 2-6 and the oil filler cap 2-7 are threadedly connected to the main housing 2-4. The air filter nozzle 2-1 is welded to the main housing 2-4. The main housing 2-4 is provided with the camshaft position sensor mounting boss 2-2, the ignition coil mounting hole 2-3, the valve cover mounting hole 2-5, and the oil dipstick mounting hole 2-8.

[0037] Furthermore, PRV valve 2-6 has a one-way ventilation and drainage function. When the engine is running, it can drain the accumulated water by negative pressure suction and the reciprocating motion of the diaphragm of PRV valve 2-6. As the engine continues to work, the pressure inside the cavity tends to stabilize, and the influence of external water pressure gradually weakens, effectively isolating the risk of surge water ingress.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproof engine general arrangement structure, characterized in that: include: A high-efficiency turbocharged engine body (31) is inclined towards the exhaust side at an angle of 0° to 20°. A valve cover assembly (2) is bolted to the upper right of the high-efficiency turbocharged engine body (31). A turbocharger intake pipe assembly (3) is bolted to the valve cover assembly (2). An intake mixing valve (17) is bolted to the turbocharger intake pipe assembly (3). The intake mixing valve (17) is connected to the vehicle's intake system via an intake flange. A turbocharger assembly (5) is bolted to the exhaust side of the cylinder block assembly (24). A three-way catalytic converter assembly (30) is bolted to the turbocharger assembly (5). An electric water pump (9) is also present. The EGR cooler assembly (29) is installed at the inlet of the cylinder block assembly (24) and located below the turbocharger assembly (5). The EGR cooler assembly (29) is installed at the coolant outlet on the exhaust side of the cylinder block assembly (24), connected to the EGR valve (40) by bolts, and takes gas from the rear section of the three-way catalytic converter assembly (30). The upper half of the intake side of the high-efficiency turbocharged engine body (31) is provided with an intake manifold assembly (13), and the lower half of the intake side of the high-efficiency turbocharged engine body (31) is provided with a water-air intercooler assembly (15). The water-air intercooler assembly (15) is connected to the intake manifold assembly (13) through the throttle body (33). The front end of the high-efficiency turbocharged engine body (31) is the turbocharger outlet pipe assembly (8). The TVD wheel cover (11) is installed on the synchronizer chain cover assembly (6).

2. The waterproof engine general arrangement structure according to claim 1, characterized in that: The turbocharger intake pipe assembly (3) is covered with a soundproof cover.

3. The waterproof engine general arrangement structure according to claim 2, characterized in that: The EGR system installed on the high-efficiency turbocharged engine body (31) includes: an EGR cooler assembly (29), an EGR valve connecting hose (39), an EGR valve (40), an EGR valve adapter (26), an EGR return water hose (28), and a small circulation return water steel pipe (20). The EGR valve (40) is bolted to the EGR cooler assembly (29), and the EGR valve adapter (26) is bolted to the EGR valve (40). The pipe (39) is installed on the EGR valve adapter (26) by clamps. The EGR temperature sensor (27) is plugged into the EGR cooler assembly (29). The EGR valve connecting hose (39) is connected to the turbocharger intake pipe assembly (3). The EGR valve (40) is connected to the whole machine cooling pipeline through the EGR return water hose (28) and the small circulation return water steel pipe (20). The EGR cooler assembly (29) is fixed to the cylinder block assembly (24) and the cylinder head assembly (19) by three brackets.

4. The waterproof engine general arrangement structure according to claim 1, characterized in that: The cooling system installed on the high-efficiency turbocharged engine body (31) includes: a water-to-air intercooler assembly (15), an intercooler return water hose assembly (14), an intercooler return water steel pipe assembly (22), and an intercooler bracket (32). The cooling system installed on the high-efficiency turbocharged engine body (31) is connected to the vehicle's auxiliary water tank. The intercooler return water steel pipe assembly (22) is fixed on the cylinder block assembly (24) and connected to the intercooler return water hose assembly (14). The water return pipe is connected to the water-to-air intercooler assembly (15). The upper end of the outlet of the water-to-air intercooler assembly (15) is connected to the throttle body (33). An intercooler bracket (32) is installed below the outlet of the water-to-air intercooler assembly (15). The intercooler bracket (32) is fixed on the cylinder block assembly (24). Intake temperature and pressure sensors (34) are inserted into both the intake manifold assembly (13) and the water-to-air intercooler assembly (15).

5. The waterproof engine general arrangement structure according to claim 4, characterized in that: The turbocharging system installed on the high-efficiency turbocharged engine body (31) includes: a turbocharger cooling pipe (37), a turbocharger oil inlet pipe (35), a turbocharger oil return pipe (36), a turbocharger intake pipe assembly (3), an intake mixing valve (17), a turbocharger exhaust hose assembly (7), and a turbocharger exhaust pipe assembly (8). The intake mixing valve (17) is located at the rear end of the high-efficiency turbocharged engine body (31) and is connected to the turbocharger intake pipe assembly (36). The turbocharger intake pipe assembly (3) is bolted to the intake port of the turbocharger assembly (5). The turbocharger assembly (5) is fixed to the side of the cylinder head assembly (19) and sealed to the cylinder head assembly (19) with a gasket. The exhaust port of the turbocharger assembly (5) is connected to the turbocharger exhaust hose assembly (7) and the turbocharger exhaust pipe assembly (8). The turbocharger exhaust pipe assembly (8) is connected to the water-air intercooler assembly (15). The air inlet is connected and fixed to the synchronous chain housing assembly (6) with a rubber gasket. The turbocharger oil inlet pipe (35) takes oil from the oil passage of the cylinder head assembly (19), is fixed with hollow bolts, and is sealed with a gasket. The turbocharger oil inlet pipe (35) is installed at the main oil passage of the cylinder block assembly (24) and is sealed with a bolt and a gasket. The turbocharger cooling pipe (37) is connected to the intercooler return water hose assembly (14) and the intercooler return water steel pipe assembly. (22) Form an auxiliary cooling system and connect it to the vehicle auxiliary water tank. The turbocharger cooling pipe (37) is connected to the water pump adapter assembly (10). The water pump adapter assembly (10) is connected to the electronic water pump (9). The turbocharger cooling pipe (37) takes water from the electronic water pump (9) and is fixedly connected to the turbocharger inlet and outlet water pipe assembly (4) set on the turbocharger assembly (5). It is connected to the small circulation return water pipe (20) and connected to the vehicle heater.

6. The waterproof engine general arrangement structure according to claim 5, characterized in that: The water pump adapter assembly (10) in the cooling system of the high-efficiency turbocharged engine body (31) is located below the exhaust-side turbocharger assembly (5), the electric water pump (9) is fixed to the cylinder block by bolts, and the water outlet adapter (38) is located below the intake manifold assembly (13) on the intake side and connected to the cylinder block.

7. The waterproof engine general arrangement structure according to claim 1, characterized in that: The turbocharger assembly (5) includes: a turbine exhaust outlet (5-1), a turbocharger (5-2), a spring washer (5-3), a rocker arm (5-4), a clamp (5-5), an exhaust inlet flange (5-6), a coolant flange (5-7), a compressor (5-8), a compressor inlet flange (5-9), an electronic actuator (5-10), and an air outlet (5-11). The turbocharger (5-2) is provided with a turbine exhaust outlet (5-1). The electronic actuator (5-10) and the compressor (5-8) are connected by bolts and clamps. The compressor (5-8) is fixed with a hoop (5-5), and the turbocharger (5-2) is fixed with bolts. The rocker arm (5-4) and the spring washer (5-3) are press-fitted with an interference fit. The exhaust gas inlet flange (5-6) is assembled with the cylinder head assembly (19). The turbine exhaust gas outlet (5-1) is assembled with the three-way catalytic converter assembly (30) with bolts. The turbocharger (5-2) is provided with a compressor inlet flange face (5-9), a coolant flange face (5-7) and an air outlet (5-11) for connecting with the high-efficiency turbocharged engine body (31).

8. The waterproof engine general arrangement structure according to claim 1, characterized in that: The bottom end of the cylinder block assembly (24) is provided with an oil pan assembly (12), an oil pump assembly (16) and a dual-mass flywheel assembly (25).

9. The waterproof engine general arrangement structure according to claim 1, characterized in that: The valve cover assembly (2) includes: an air filter nozzle (2-1), a camshaft position sensor mounting boss (2-2), an ignition coil mounting hole (2-3), a main housing (2-4), a valve cover mounting hole (2-5), a PRV valve (2-6), an oil filler cap (2-7), and an oil dipstick mounting hole (2-8). The PRV valve (2-6) and the oil filler cap (2-7) are connected to the main housing (2-4) by threaded connection. The air filter nozzle (2-1) is welded to the main housing (2-4). The main housing (2-4) is provided with a camshaft position sensor mounting boss (2-2), an ignition coil mounting hole (2-3), an ignition coil mounting hole (2-3), a valve cover mounting hole (2-5), and an oil dipstick mounting hole (2-8).

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