A high thermal efficiency, large tilt angle engine assembly

Abstract

This invention relates to the field of engine technology and discloses a high thermal efficiency, large-angle engine assembly, including a gasoline engine body, an intake manifold assembly, a throttle body assembly, dual injection rails, an exhaust manifold assembly, an EGR cooler, a water pump assembly, an EGR system, a cooling system, a bypass cooling system, and a front-end wheel train. The EGR system includes an EGR pipe assembly, an EGR valve, an EGR cooler, an EGR temperature sensor, and an EGR intake pipe. The gasoline engine body is arranged at an angle of 45°–60°. In this invention, the engine adopts an overall layout structure with a large tilt angle of 45°–60°. By employing advanced technologies such as dual-port injection, centrally located DVVT, an oil cooler, a cooled EGR, and an integrated exhaust manifold in the cylinder head, combined with multiple friction-reducing technologies such as DLC-coated tappets, the engine's thermal efficiency is improved, and its fuel consumption is reduced. Furthermore, by optimizing the layout and compacting the component design, the engine's overall dimensions are reduced, effectively solving the problem of insufficient space in small engine compartments.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a high thermal efficiency large tilt angle engine assembly. Background Technology

[0002] With the increasing application of gasoline engines, the 1.8L to 2.0L naturally aspirated gasoline engines in existing cars are being arranged more and more compactly in the engine compartment. The national regulations on vehicle emissions and fuel consumption are becoming more and more stringent. In order to gain a place in the engine market, it is necessary to improve the thermal efficiency of the engine, reduce the fuel consumption of the engine, and meet the more stringent emission standards.

[0003] Currently, many existing car engines rely on the reciprocating linear motion of the piston within the cylinder to complete the four strokes of intake, compression, power, and exhaust. When the piston moves upward and downward in a linear motion, its large inertia increases the engine's operating resistance, slows down the engine speed, reduces the engine's power, and makes the engine run unevenly.

[0004] As the automotive industry demands higher levels of comfort and requires more cab space, the engine mounting height in the engine compartment is decreasing. When existing high-angle engines are placed in the increasingly confined engine compartment space, it is generally impossible to guarantee the clearance between the engine and the engine compartment.

[0005] Therefore, those skilled in the art have provided a high thermal efficiency, large tilt angle engine assembly to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high thermal efficiency, large tilt angle engine assembly. This assembly solves the problem that, as the automotive industry demands higher comfort levels and larger cab spaces, resulting in lower engine bay heights, existing large tilt angle engines cannot guarantee sufficient clearance between the engine and the engine bay when placed in increasingly confined engine bay spaces.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high thermal efficiency, large-angle engine assembly includes a gasoline engine block, an intake manifold assembly, a throttle body assembly, dual injection rails, an exhaust manifold assembly, an EGR cooler, a water pump assembly, an EGR system, a cooling system, a bypass cooling system, and a front-end wheel train. The EGR system includes an EGR pipe assembly, an EGR valve, an EGR cooler, an EGR temperature sensor, and an EGR intake pipe. The gasoline engine block is arranged at an angle of 45°-60°. The dual injection rails and the intake manifold assembly are located on the upper right side of the gasoline engine block, i.e., the intake side. The dual injection rails are located on the cylinder head at the end of the intake manifold assembly's intake port. The intake manifold assembly is bolted to the gasoline engine block. An intake temperature and pressure sensor and a throttle body are arranged on the intake manifold assembly. The throttle body assembly is connected to the vehicle's intake system. A valve cover is installed on the outside of the throttle body assembly. An oil cooler is arranged on the lower half of the intake side of the gasoline engine body. Oil is drawn from the cylinder oil passage for cooling and then returned to the cylinder oil passage. An exhaust manifold assembly is arranged on the exhaust side of the gasoline engine body. A water pump is arranged below the exhaust manifold assembly at the front end of the gasoline engine body. The EGR cooler is arranged on the upper rear side of the gasoline engine body and draws air from the outlet flange of the exhaust manifold assembly. The EGR valve is connected to the EGR cooler and is arranged on the exhaust side of the EGR cooler. The EGR valve is connected to the intake manifold assembly through an EGR pipe assembly. The gasoline engine body is fixedly installed inside the engine compartment of the vehicle via the right engine mount.

[0009] Through the above technical solutions, the engine adopts an overall layout structure with a large tilt angle of 45°-60°. By employing advanced technologies such as dual-injection ports, centrally located DVVT, oil cooler, cooled EGR, and cylinder head integrated exhaust manifold, combined with multiple friction-reducing technologies such as DLC-coated tappets, the engine's thermal efficiency is improved and its fuel consumption is reduced. Through the rational design of related parts such as the intake manifold, dual injection rails, EGR valve, EGR cooler, exhaust manifold assembly, engine wheel system, and cooling system, the gasoline engine can be laid out with a large tilt angle of 45°-60°. This allows the engine to achieve a thermal efficiency of 41% while still being reasonably arranged in the original compact engine compartment, improving the engine's layout adaptability.

[0010] Furthermore, the EGR system takes gas from the exhaust manifold assembly outlet flange, and the gas enters the EGR cooler through the EGR intake pipe for cooling. After the EGR temperature sensor detects the exhaust temperature, the gas passes through the EGR valve and EGR pipe assembly and enters the intake manifold pressure regulating chamber, where it mixes with fresh intake air and is then drawn into the engine cylinder to participate in power.

[0011] Through the above technical solution, the gas discharged from the exhaust manifold assembly enters the EGR cooler through the EGR intake pipe in the EGR system for cooling. After the exhaust temperature is detected by the EGR temperature sensor, the gas passes through the EGR valve and EGR pipe assembly and enters the intake manifold pressure regulating chamber. After mixing with fresh intake air, it is drawn into the engine cylinder to participate in power, which can recover and recycle the exhaust gas, thus saving more energy.

[0012] Furthermore, the EGR cooler is fixed by three brackets, two of which are fixed to the cylinder head and one of which is fixed to the flange at the rear of the cylinder block;

[0013] The above technical solution allows the EGR cooler to be easily fixed to the flanges of the engine cylinder head and cylinder block using a bracket, facilitating the installation and fixation of the EGR system.

[0014] Furthermore, the cooling section of the EGR system takes coolant from the exhaust side water jacket of the fourth cylinder of the cylinder block, and enters the cooler from below the EGR cooler through the coolant water intake pipe. The coolant and gas flow through the EGR cooler in the same direction, and after cooling the cooler, it returns to the intake side cooling water jacket of the cylinder block through the upper EGR cooler water outlet hose assembly and water outlet adapter.

[0015] The above technical solution involves taking coolant from the exhaust side of the cylinder block's water jacket at the EGR cooling section of the EGR system. The coolant enters the EGR cooler from below through a coolant intake pipe, flowing in the same direction as the gas. After cooling the cooler, the coolant returns to the intake side of the cylinder block's cooling water jacket through the upper EGR cooler outlet hose assembly and outlet adapter, thus achieving better engine cooling.

[0016] Furthermore, the EGR cooler includes a cooler mounting bracket, a coolant water inlet pipe, a gas inlet bellows, a cooler gas inlet flange, an EGR temperature sensor mounting base, an EGR coolant outlet pipe, a cooler body, and an EGR valve connection flange. The gas inside the EGR cooler enters the EGR cooler through the gas inlet flange and the EGR gas inlet bellows, and after cooling, it enters the intake manifold assembly through the EGR valve and the EGR pipe assembly.

[0017] The above technical solution uses the EGR cooler in the gasoline engine structure to quickly cool the exhaust gas from the engine.

[0018] Furthermore, the bypass cooling system includes a water pump adapter, a water pump assembly, a cylinder block water jacket, an outlet adapter, an adapter steel pipe, and a thermostat cover. The EGR cooler and the cooling pipes together form a cooling bypass and are connected back to the engine cooling system.

[0019] Through the above technical solution, the cooling water in the cooling system of the gasoline engine body structure enters from the front end of the cylinder block exhaust side through the inlet steel pipe, water pump adapter and water pump assembly. After cooling the cylinder head and cylinder block respectively, it flows out from the intake side outlet adapter. After flowing out, the water flows into the adapter steel pipe and splits into two paths at the thermostat cover. One path connects to the whole vehicle and enters the whole vehicle cooling system, and the other path flows back to the inlet steel pipe through the small circulation hose and other pipes to re-enter the cooling cycle, so as to realize the recycling of cooling water and extend its service life.

[0020] Furthermore, the cooling system includes a small circulation hose, an inlet steel pipe, a water pump adapter, a water pump assembly, a cylinder block water passage, an outlet adapter, an adapter steel pipe, and a thermostat cover. The inlet steel pipe is located at the front of the engine and is bolted to the water pump adapter. The water pump adapter is fixed to the exhaust side inlet at the front of the cylinder block. The water pump assembly is also bolted to the water pump adapter and sealed to the water pump adapter with a gasket. The water pump adapter is sealed to the cylinder block with a gasket. The cylinder block water passage outlet is located at the cylinder block... The intake side is located in the middle and is connected to the water outlet adapter. The water outlet adapter and the connecting steel pipe connected to it are equipped with connectors, which are connected to the EGR cooler water outlet connector and the oil cooler water outlet connector respectively through rubber hoses. The two ends of the small circulation rubber hose are connected to the water outlet adapter and the water pump assembly respectively. The two ends of the connecting steel pipe are connected to the water outlet adapter and the thermostat cover respectively, and are sealed with O-rings. The outlet of the thermostat cover is connected to the vehicle water tank through a rubber hose, forming the engine cooling system.

[0021] Through the above technical solution, fresh air enters the intake manifold assembly from the throttle body assembly via the vehicle's air filter and then enters the engine. Exhaust gas from inside the engine passes through the exhaust manifold and is divided into two paths. One path continues to be discharged outward through the vehicle's exhaust system connected to the exhaust manifold flange, while the other path passes through the EGR cooler intake pipe flange and EGR intake bellows to enter the EGR cooler. After being cooled, it passes through the EGR valve and EGR pipe assembly to enter the intake manifold assembly and re-enter the gas circulation, thereby achieving engine gas cooling.

[0022] Furthermore, the cylinder head exhaust side has three outlets, of which cylinders two and three share one exhaust outlet, and the three inlets of the exhaust manifold assembly are correspondingly connected to the three exhaust outlets of the cylinder head and sealed by gaskets.

[0023] The above technical solution divides the four cylinder outlets of the engine into three outlets, with cylinders one and four having separate exhaust outlets, while cylinders two and three share a single exhaust outlet, which allows for better cylinder exhaust and a more efficient exhaust effect.

[0024] Furthermore, the front-end pulley system uses a mechanical tensioner to tension the generator belt. The generator is connected to the compressor via belt drive. The mechanical tensioner is fixed to the cylinder body by two hexagonal flange studs with hexagonal centers and a bolt passing through the front-end synchronous chain cover. One end of the two hexagonal flange studs presses against the synchronous chain cover, while the other end supports and fixes the mechanical tensioner. The mechanical tensioner includes a mechanical tensioner body, hexagonal flange studs, and a locking nut.

[0025] The above technical solution uses a mechanical tensioner to tension the generator belt, and the generator is connected to the compressor via belt drive, which can always maintain the belt tension between the generator and the compressor, thus improving the transmission effect.

[0026] This utility model has the following beneficial effects:

[0027] 1. This utility model proposes a high thermal efficiency large tilt angle engine assembly. The engine adopts an overall layout structure with a large tilt angle of 45°-60°. By adopting advanced technical solutions such as dual-injection in the air port, centrally located DVVT, oil cooler, cooled EGR, and cylinder head integrated exhaust manifold, combined with multiple friction reduction technologies such as DLC coated tappets, the engine thermal efficiency is improved and the engine fuel consumption is reduced. Furthermore, by optimizing the layout and compacting the component design, the engine outline size is reduced, effectively solving the problem of insufficient space in a small engine compartment.

[0028] 2. This utility model proposes a high thermal efficiency large tilt angle engine assembly. Through the rational design of the intake manifold, dual fuel injection rails, EGR valve, EGR cooler, exhaust manifold assembly, engine wheel system, cooling system and other related parts, the gasoline engine can be laid out with a large tilt angle of 45°-60°. This allows the engine to improve its thermal efficiency to 41% and still be reasonably arranged in the original compact engine compartment, thus improving the engine's layout adaptability.

[0029] 3. The present invention proposes a high thermal efficiency, large tilt angle engine assembly. This layout is designed for situations with multiple engine configurations and components, with a reasonable arrangement, small space occupation, and meets the layout requirements of compact engine compartment vehicles. For the layout of new large displacement, high thermal efficiency gasoline engines of 1.8L to 2.0L, it can simultaneously meet the layout requirements of various tilt angles from 45° to 60°. It can be flexibly adjusted according to the overall vehicle layout requirements, has the characteristics of wide adaptability, and has better performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the engine front end of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model.

[0031] Figure 2This is a schematic diagram of the rear end of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model.

[0032] Figure 3 This is a schematic diagram of the engine intake side of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model.

[0033] Figure 4 This is a schematic diagram of the exhaust outlet on the exhaust side of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model.

[0034] Figure 5 This is a schematic diagram of the mechanical tensioner structure of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model;

[0035] Figure 6 This is a schematic diagram of the engine EGR cooler structure of a high thermal efficiency, large tilt angle engine assembly proposed in this utility model.

[0036] Legend:

[0037] 1. Intake manifold assembly; 2. Intake temperature and pressure sensor; 3. Throttle body assembly; 4. Dual fuel injection rails; 5. Valve cover; 6. Exhaust manifold assembly; 7. Right engine mount; 8. Alternator; 9. Compressor; 10. Mechanical tensioner; 10-1. Hexagonal flange stud; 10-2. Lock nut; 11. Small circulation hose; 12. EGR cooler; 12-1. Cooler mounting bracket; 12-2. Coolant intake pipe; 12-3. Cooler intake flange; 12 -4. EGR temperature sensor mounting bracket; 12-5. Coolant outlet pipe; 12-6. Cooler body; 12-7. EGR valve connecting flange; 13. Inlet steel pipe; 14. Water pump adapter; 15. Water pump assembly; 16. EGR cooler inlet hose; 17. EGR cooler outlet hose assembly; 18. Adapter steel pipe; 19. Thermostat cover; 20. EGR air intake bellows; 21. EGR valve; 22. EGR pipe assembly; 23. Outlet adapter. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1-6 One embodiment provided by this utility model:

[0040] A high thermal efficiency, large tilt angle engine assembly includes a gasoline engine body, an intake manifold assembly 1, a throttle body assembly 3, dual injection rails 4, an exhaust manifold assembly 6, an EGR cooler 12, a water pump assembly 15, an EGR system, a cooling system, a bypass cooling system, and a front-end wheel train. The EGR system includes an EGR pipe assembly 22, an EGR valve 21, an EGR cooler 12, an EGR temperature sensor, and an EGR intake pipe 30. The gasoline engine body is arranged at an angle of 45°-60°. The dual injection rails and the intake manifold assembly 1 are arranged on the upper right side of the gasoline engine body, i.e., the intake side. The dual injection rails 4 are arranged on the cylinder head at the end of the intake manifold assembly 1's intake port. The intake manifold assembly 1 is bolted to the gasoline engine body. An intake air temperature and pressure sensor 2 and an intake manifold assembly 3 are arranged on the intake manifold assembly 1. Throttle body assembly 3 is connected to the vehicle's intake system. A valve cover 5 is installed on the outside of the throttle body assembly 3. An oil cooler is arranged on the lower half of the intake side of the gasoline engine body. Oil is led out of the cylinder oil passage for cooling and then led back to the cylinder oil passage. An exhaust manifold assembly 6 is arranged on the exhaust side of the gasoline engine body. A water pump is arranged below the exhaust manifold assembly 6 at the front end of the gasoline engine body. An EGR cooler 12 is arranged on the upper rear side of the gasoline engine body and takes gas from the outlet flange of the exhaust manifold assembly 6. An EGR valve 21 is connected to the EGR cooler 12 and is arranged on the exhaust side of the EGR cooler 12. The EGR valve 21 is connected to the intake manifold assembly 1 through an EGR pipe assembly 22. The gasoline engine body is fixedly installed inside the engine compartment of the car through the right engine mount 7.

[0041] This engine features a large tilt angle of 45°-60° for its overall layout. By employing advanced technologies such as dual-injection ports, centrally located DVVT, oil cooler, cooled EGR, and cylinder head integrated exhaust manifold, along with multiple friction-reducing technologies such as DLC-coated tappets, it improves engine thermal efficiency and reduces fuel consumption. Through the rational design of related components such as the intake manifold, dual injection rails, EGR valve, EGR cooler, exhaust manifold assembly, engine wheel system, and cooling system, the gasoline engine can be laid out with a large tilt angle of 45°-60°. This allows the engine to achieve a thermal efficiency of 41% while still being reasonably placed in the original compact engine compartment, improving the engine's layout adaptability.

[0042] The EGR system draws exhaust gas from the outlet flange of the exhaust manifold assembly 6. The gas enters the EGR cooler 12 through the EGR intake pipe 30 for cooling. After the EGR temperature sensor detects the exhaust temperature, the gas passes through the EGR valve 21 and the EGR pipe assembly 22 and enters the intake manifold pressure regulating chamber. After mixing with fresh intake air, it is drawn into the engine cylinder to participate in power generation. The gas discharged from the exhaust manifold assembly 6 enters the EGR cooler 12 through the EGR intake pipe 30 in the EGR system for cooling. After the EGR temperature sensor detects the exhaust temperature, the gas passes through the EGR valve 21 and the EGR pipe assembly 22 and enters the intake manifold pressure regulating chamber. After mixing with fresh intake air, it is drawn into the engine cylinder to participate in power generation. This system can recover and recycle exhaust gas, thus saving more energy.

[0043] The EGR cooler 12 is fixed by three brackets, two of which are fixed to the cylinder head and one of which is fixed to the flange at the rear of the cylinder block. The brackets facilitate the connection between the EGR cooler 12 and the flange of the engine cylinder head and cylinder block, making it easy to install and fix the EGR system.

[0044] The EGR system's cooling section draws coolant from the exhaust side water jacket of cylinder 4 in the engine block. The coolant enters the EGR cooler 12 from below through coolant intake pipe 12-2. The coolant flows in the same direction as the gas through the EGR cooler 12, cooling it down. Then, it returns to the intake side cooling jacket of the engine block through the upper EGR cooler outlet hose assembly 17 and outlet adapter 23. This process, involving the EGR cooling section drawing coolant from the exhaust side water jacket of cylinder 4 in the EGR system, and entering the EGR cooler 12 from below through coolant intake pipe 12-2, allows the coolant to flow in the same direction as the gas through the EGR cooler 12. After cooling the cooler, it returns to the intake side cooling jacket of the engine block through the upper EGR cooler outlet hose assembly 17 and outlet adapter 23, thus achieving better engine cooling.

[0045] The EGR cooler 12 includes a cooler mounting bracket 12-1, a coolant intake pipe 12-2, an intake bellows pipe 20, a cooler intake flange 12-3, an EGR temperature sensor mounting base 12-4, an EGR coolant outlet pipe 12-5, a cooler body 12-6, and an EGR valve connection flange 12-7. Gas inside the EGR cooler 12 enters the EGR cooler 12 through the intake pipe flange 12-3 and the EGR intake bellows pipe 20. After cooling, it enters the intake manifold assembly 1 through the EGR valve 21 and the EGR pipe assembly 22. The EGR cooler 12 in the gasoline engine structure rapidly cools the gas discharged from the engine.

[0046] The bypass cooling system includes a water pump adapter 14, a water pump assembly 15, a cylinder block water jacket, an outlet adapter 23, an adapter steel pipe 18, and a thermostat cover 19. The EGR cooler 12 and the cooling pipes together form a cooling bypass and are connected back to the engine cooling system. The cooling water in the gasoline engine body structure enters from the exhaust side of the cylinder block through the inlet steel pipe 13, the water pump adapter 14, and the water pump assembly 5. After cooling the cylinder head and cylinder block respectively, it flows out from the outlet adapter 23 on the intake side. After flowing out, the water flows into the adapter steel pipe 18 and splits into two paths at the thermostat cover 5. One path connects to the whole vehicle and enters the whole vehicle cooling system, while the other path flows back to the inlet steel pipe 13 through the small circulation hose 11 and other pipes, re-entering the cooling cycle to achieve the recycling of cooling water and extend its service life.

[0047] The cooling system includes a small circulation hose 11, an inlet steel pipe 13, a water pump adapter 14, a water pump assembly 15, a cylinder block water passage, an outlet adapter 23, an adapter steel pipe 18, and a thermostat cover 19. The inlet steel pipe 13 is located at the front of the engine and is bolted to the water pump adapter 14. The water pump adapter 14 is fixed to the exhaust side inlet at the front of the cylinder block. The water pump assembly 15 is also bolted to the water pump adapter 14 and sealed to it with a gasket. The water pump adapter 14 is also sealed to the cylinder block with a gasket. The cylinder block water passage outlet is located in the middle of the intake side of the cylinder block and is connected to the outlet adapter 23. The outlet adapter 23 and the connected adapter steel pipe 18 are equipped with connectors, which are connected to the outlet connectors of the EGR cooler 12 and the oil cooler 12 via hoses. The small circulation... The two ends of the hose 11 are connected to the water outlet adapter 23 and the water pump assembly 15, respectively. The two ends of the adapter steel pipe 18 are connected to the water outlet adapter 23 and the thermostat cover 19, respectively, and are sealed with O-rings. The outlet of the thermostat cover 19 is connected to the vehicle water tank through the hose, forming the engine cooling system. Fresh air enters the intake manifold assembly 1 from the throttle body assembly 3 through the vehicle air filter and then enters the engine. Exhaust gas enters the engine through the exhaust manifold 6 and is divided into two paths. One path continues to the outside and is discharged through the vehicle exhaust system connected to the exhaust manifold flange. The other path enters the EGR cooler 12 through the EGR cooler intake pipe flange 12-3 and the EGR intake bellows 20. After cooling, it enters the intake manifold assembly 1 through the EGR valve 21 and the EGR pipe assembly 22, and re-enters the gas circulation to achieve engine gas cooling.

[0048] The cylinder head exhaust side has three outlets, with cylinders two and three sharing one exhaust outlet. The three inlets of the exhaust manifold assembly 6 are connected to the three exhaust outlets of the cylinder head and sealed with gaskets, dividing the four cylinder exhaust ports of the engine into three outlets. Cylinders one and four have separate exhaust outlets, while cylinders two and three share one exhaust outlet, which allows for better cylinder exhaust and better exhaust effect.

[0049] The front-end pulley system uses a mechanical tensioner 10 to tension the belt of the generator 8. The generator 8 is connected to the compressor 9 via belt drive. The mechanical tensioner 10 is fixed to the cylinder body through two hexagonal flange studs 10-1 with hexagonal corners in the middle and a bolt passing through the front-end synchronous chain cover. One end of the two hexagonal flange studs 10-1 with hexagonal corners in the middle presses against the synchronous chain cover, while the other end supports and fixes the mechanical tensioner 10. The mechanical tensioner 10 includes a mechanical tensioner body, hexagonal flange studs 10-1 and locking nuts 10-2. The mechanical tensioner 10 is used to tension the belt of the generator 8, and the generator 8 is connected to the compressor 9 via belt drive. This can always maintain the belt tension between the generator 8 and the compressor 9, making its transmission effect better.

[0050] Working Principle: This high-efficiency, large-angle engine assembly features a 45°-60° tilt angle layout. Utilizing advanced technologies such as dual-injection ports, centrally located DVVT, oil cooler, cooled EGR, and cylinder head-integrated exhaust manifold, along with DLC-coated tappets and other friction-reducing technologies, it improves engine thermal efficiency and reduces fuel consumption. Through the rational design of components such as the intake manifold, dual-injection rails, EGR valve, EGR cooler, exhaust manifold assembly, engine wheel system, and cooling system, the gasoline engine can be positioned at a 45°-60° tilt angle. This allows the engine to achieve a thermal efficiency of 41% while still fitting within a compact engine bay, enhancing its adaptability. Furthermore, the cooling system's cooling water is channeled through inlet steel pipes and water... The pump adapter and water pump assembly enter from the front end of the cylinder block exhaust side, cooling the cylinder head and cylinder block respectively, and then flow out from the intake side water adapter. After flowing out, the water flows into the adapter steel pipe, and splits into two paths at the thermostat cover. One path connects to the whole vehicle and enters the whole vehicle cooling system, while the other path flows back to the water inlet steel pipe through the small circulation hose and other pipes, re-entering the cooling cycle. In the gasoline engine body structure, the air flow is as follows: fresh air enters the intake manifold assembly through the whole vehicle air filter and then enters the engine. Exhaust gas enters the engine through the exhaust manifold and splits into two paths. One path continues to the outside and is discharged through the whole vehicle exhaust system connected to the exhaust manifold flange. The other path enters the EGR cooler through the EGR cooler intake pipe flange and EGR intake bellows. After cooling, it enters the intake manifold assembly through the EGR valve and EGR pipe assembly, re-entering the gas cycle.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high thermal efficiency, large tilt angle engine assembly, comprising a gasoline engine body, an intake manifold assembly (1), a throttle body assembly (3), dual fuel injection rails (4), an exhaust manifold assembly (6), a water pump assembly (15), an EGR system, a cooling system, a bypass cooling system, and a front-end wheel system, wherein the EGR system comprises an EGR pipe assembly (22), an EGR valve (21), an EGR cooler (12), an EGR temperature sensor, and an EGR intake pipe (30), characterized in that: The gasoline engine body is arranged at an angle of 45°-60°. The upper right side of the gasoline engine body, i.e., the intake side, is equipped with a dual fuel injection rail and an intake manifold assembly (1). The dual fuel injection rail (4) is arranged on the cylinder head at the end of the intake manifold assembly (1). The intake manifold assembly (1) is bolted to the gasoline engine body. The intake manifold assembly (1) is equipped with an intake temperature and pressure sensor (2) and a throttle body assembly (3). The throttle body assembly (3) is connected to the vehicle's intake system. A valve cover (5) is provided on the outside of the throttle body assembly (3). An oil cooler is arranged on the lower half of the intake side of the gasoline engine body. The oil circuit of the cylinder block is led out. After the oil is cooled, it is returned to the cylinder oil circuit. An exhaust manifold assembly (6) is arranged on the exhaust side of the gasoline engine body. A water pump is arranged below the exhaust manifold assembly (6) at the front end of the gasoline engine body. The EGR cooler (12) is arranged above the rear side of the gasoline engine body and takes gas from the outlet flange of the exhaust manifold assembly (6). The EGR valve (21) is connected to the EGR cooler (12) and is arranged on the exhaust side of the EGR cooler (12). The EGR valve (21) is connected to the intake manifold assembly (1) through the EGR pipe assembly (22). The gasoline engine body is fixedly installed inside the engine compartment of the car through the right engine mount (7). The EGR system takes gas from the outlet flange of the exhaust manifold assembly (6). The gas enters the EGR cooler (12) through the EGR intake pipe (30) for cooling. After the EGR temperature sensor detects the exhaust temperature, the gas passes through the EGR valve (21) and the EGR pipe assembly (22) and enters the intake manifold pressure regulating chamber. After mixing with fresh intake air, it is drawn into the engine cylinder to participate in the work. The EGR cooler (12) is fixed by three brackets, two of which are fixed on the cylinder head and one of which is fixed at the flange behind the cylinder block. The cooling part of the EGR system takes coolant from the fourth cylinder of the exhaust side water jacket of the cylinder block, and enters the cooler from below the EGR cooler (12) through the coolant water intake pipe (12-2). The coolant and gas flow through the EGR cooler (12) in the same direction. After cooling the cooler, the coolant returns to the cylinder block intake side cooling water jacket through the upper EGR cooler water outlet hose assembly (17) and water outlet adapter (23). The EGR cooler (12) includes a cooler fixing bracket (12-1), a coolant water intake pipe (12-2), a gas intake bellows (20), a cooler gas intake flange (12-3), an EGR temperature sensor mounting base (12-4), an EGR coolant water outlet pipe (12-5), a cooler body (12-6), and an EGR valve connection flange (12-7). The gas inside the EGR cooler (12) enters the EGR cooler (12) through the gas intake pipe flange (12-3) and the EGR gas intake bellows (20), and after cooling, it enters the intake manifold assembly (1) through the EGR valve (21) and the EGR pipe assembly (22).

2. The high thermal efficiency large tilt angle engine assembly according to claim 1, characterized in that: The bypass cooling system includes a water pump adapter (14), a water pump assembly (15), a cylinder block water jacket, an outlet adapter (23), an adapter steel pipe (18), and a thermostat cover (19). The EGR cooler (12) and the cooling pipes together form a cooling bypass and are connected back to the engine cooling system.

3. The high thermal efficiency large tilt angle engine assembly according to claim 1, characterized in that: The cooling system includes a small circulation hose (11), an inlet steel pipe (13), a water pump adapter (14), a water pump assembly (15), a cylinder block water passage, an outlet adapter (23), an adapter steel pipe (18), and a thermostat cover (19). The inlet steel pipe (13) is located at the front of the engine and is bolted to the water pump adapter (14). The water pump adapter (14) is fixed to the exhaust side inlet at the front of the cylinder block. The water pump assembly (15) is also bolted to the water pump adapter (14) and sealed to the water pump adapter (14) with a gasket. The water pump adapter (14) is sealed to the cylinder block with a gasket. The cylinder block water passage outlet is located at... The cylinder block is located in the middle of the intake side and is connected to the water outlet adapter (23). The water outlet adapter (23) and the adapter steel pipe (18) connected to it are equipped with connectors and are connected to the water outlet connectors of the EGR cooler (12) and the oil cooler through rubber hoses. The two ends of the small circulation rubber hose (11) are connected to the water outlet adapter (23) and the water pump assembly (15) respectively. The two ends of the adapter steel pipe (18) are connected to the water outlet adapter (23) and the thermostat cover (19) respectively and are sealed with O-rings. The outlet of the thermostat cover (19) is connected to the vehicle water tank through a rubber hose to form the engine cooling system.

4. The high thermal efficiency large tilt angle engine assembly according to claim 1, characterized in that: The cylinder head exhaust side has three outlets, of which cylinders two and three share one exhaust outlet. The three inlets of the exhaust manifold assembly (6) are connected to the three exhaust outlets of the cylinder head and sealed by gaskets.

5. A high thermal efficiency, large tilt angle engine assembly according to claim 1, characterized in that: The front-end pulley system uses a mechanical tensioning wheel (10) to tension the belt of the generator (8). The generator (8) is connected to the compressor (9) via belt drive. The mechanical tensioning wheel (10) is fixed to the cylinder body by two hexagonal flange studs (10-1) with hexagonal corners in the middle and a bolt passing through the front-end synchronous chain cover. One end of the two hexagonal flange studs (10-1) with hexagonal corners in the middle presses against the synchronous chain cover, while the other end supports and fixes the mechanical tensioning wheel (10). The mechanical tensioning wheel (10) includes a mechanical tensioning wheel body, a hexagonal flange stud (10-1), and a locking nut (10-2).

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