Timing cover, engine and vehicle

Abstract

The utility model relates to the technical field of engines, aims to solve the technical problems that oil-gas separators of some engines fail to work and are easy to damage, and provides a timing cover, an engine and a vehicle. The timing cover comprises a cover body and an oil-gas separator. The cover body is connected to the crankcase, and a sealing cavity is defined between the cover body and the crankcase; the crankcase is further provided with a first communicating hole, the first communicating hole communicates with the sealing cavity and the crankshaft cavity, and the first communicating hole is constructed to allow an oil-gas mixture in the crankshaft cavity to enter the sealing cavity. The oil-gas separator is arranged in the sealing cavity and provided with a gas inlet hole, a gas exhaust hole and an oil return opening, the gas inlet hole and the oil return opening are formed in a spaced mode and communicate with the sealing cavity, the gas exhaust hole communicates with the outside of the sealing cavity and the outside of the crankshaft cavity, and the oil-gas separator is used for separating engine oil and mixed gas and discharging the engine oil from the oil return opening; and the mixed gas is discharged from the exhaust hole. The oil-gas separator has the beneficial effect that the use reliability of the oil-gas separator is improved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a timing cover, an engine and a vehicle. Background Art

[0002] When the known engine is working, part of the fuel-gas mixture and combustion products flow into the crankcase and form blowby gas. The components of the blowby gas include fuel gas, water vapor and exhaust gas, etc. The blowby gas will reduce the performance and life of the engine oil in the crankcase.

[0003] Some engines are equipped with a crankcase ventilation system to discharge blowby gas out of the crankcase. However, the known crankcase ventilation system needs to occupy the engine's environmental space, making the engine larger, and some parts of the crankcase ventilation system are prone to oil and gas freezing, and may be damaged during assembly, transportation and vehicle operation. Utility Model Content

[0004] The present application provides a timing cover, an engine and a vehicle to solve the technical problem that the oil-gas separators of some engines fail to work and are easily damaged.

[0005] In a first aspect, the present application provides a timing cover, which is applied to an engine, wherein the engine includes a crankcase, wherein the crankcase is provided with a crankshaft cavity, and wherein the timing cover includes a cover body and an oil-gas separator. The cover body is connected to the crankcase, and a sealed cavity is formed between the cover body and the crankcase; the crankcase is also provided with a first communicating hole, wherein the first communicating hole communicates with the sealed cavity and the crankshaft cavity, and the first communicating hole is configured to allow the oil-gas mixture in the crankshaft cavity to enter the sealed cavity. The oil-gas separator is disposed in the sealed cavity, and the oil-gas separator is provided with an air inlet, an air outlet, and an oil return port, wherein the air inlet and the oil return port are arranged at intervals, wherein the air inlet and the oil return port are both connected with the sealed cavity, and the air outlet is connected to the outside of the sealed cavity and the crankshaft cavity, and the oil-gas separator is configured to separate the oil-gas mixture into engine oil and mixed gas, and discharge the engine oil from the oil return port to the sealed cavity, and the mixed gas is discharged from the sealed cavity and the crankshaft cavity from the air outlet.

[0006] According to the timing cover of the present application, when the engine is running, the oil-gas mixture in the crankcase can be discharged into the sealed cavity through the first connecting hole, and the oil-gas mixture entering the sealed cavity enters the oil-gas separator through the air inlet hole. The oil-gas separator separates the oil-gas mixture into engine oil and mixed gas, and the mixed gas includes unburned fuel gas, water vapor and combustion exhaust gas, etc. The mixed gas is discharged to the outside of the sealed cavity and the crankshaft cavity through the exhaust hole, thereby greatly reducing the possibility of contamination of the engine oil in the crankcase and the sealed cavity, and extending the service life of the engine oil in the crankcase and the sealed cavity. The engine oil is discharged from the oil return port to achieve the function of reuse.

[0007] The timing cover of the present application makes full use of the sealed cavity surrounded by the cover body and the crankcase, so that the oil-gas separator does not need to be placed outside the engine body, while ensuring the ventilation performance of the crankcase, reducing the overall size of the engine. At the same time, the cover body can play a role in heat insulation between the oil-gas separator and the external environment. When the external environment temperature is low, the sealed cavity can still maintain a relatively high temperature, reducing the possibility of condensation or freezing of water vapor in the oil-gas separator, thereby greatly alleviating the oil-gas freezing problem of the oil-gas separator and ensuring the operational reliability of the crankcase ventilation system. In addition, the cover body can also protect the oil-gas separator. After the oil-gas separator is integrated into the timing cover, the oil-gas separator is not easily damaged by direct collision during the assembly, transportation and operation of the engine, thereby extending the service life of the oil-gas separator.

[0008] In one possible implementation:

[0009] The oil-gas separator comprises a bottom wall and a surrounding wall. The oil return port is provided on the bottom wall. The surrounding wall is connected to the bottom wall, and the surrounding wall and the bottom wall enclose an oil-gas separation chamber, the cross-sectional area of ​​the surrounding wall gradually decreases in a direction close to the bottom wall, and the air inlet and the air outlet are both provided on the surrounding wall.

[0010] In one possible implementation:

[0011] The timing cover further includes a one-way valve, which is disposed at the oil return port and is configured to allow the engine oil separated by the oil-gas separator to be discharged to the sealing chamber in one direction.

[0012] In one possible implementation:

[0013] The crankcase or the cover body is further provided with a second communicating hole, one end of which is connected to the outside of the sealing cavity and the crankshaft cavity. The surrounding wall is provided on the surface of the crankcase, and the exhaust hole is sealed and connected to the other end of the second communicating hole.

[0014] In a second aspect, the present application provides an engine, comprising a crankcase and the aforementioned timing cover. The crankcase is provided with a crankshaft cavity, and the crankcase is provided with a first connecting hole. The timing cover is connected to the crankcase and forms a sealed cavity with the crankcase, and the sealed cavity is connected to the crankshaft cavity through the first connecting hole.

[0015] In one possible implementation:

[0016] The engine further comprises a cylinder assembly and an intake assembly. The cylinder assembly is connected to the crankcase, and the cylinder assembly is also connected to the crankcase, and the oil-gas mixture of the cylinder assembly can be delivered to the crankshaft chamber. The intake assembly is connected to the crankcase, and the intake assembly is provided with an intake communication hole, and the intake communication hole is connected to the exhaust hole, and the intake assembly is also connected to the cylinder assembly. The intake assembly, the cylinder assembly, the crankshaft chamber, the sealing chamber and the oil-gas separator are connected in sequence and constitute a ventilation channel of the engine.

[0017] In one possible implementation:

[0018] The crankcase or the cover body is provided with a second communication hole, and the second communication hole is sealed and connected with the exhaust hole. The engine further includes a PCV valve, one end of the PCV valve is configured to be accommodated in the second communication hole, and the other end of the PCV valve is configured to be accommodated in the intake communication hole, and the second communication hole is connected with the intake communication hole through the PCV valve.

[0019] In one possible implementation:

[0020] The crankcase includes a first side wall, the timing cover is connected to the first side wall and forms a sealed cavity with the first side wall, the second communicating hole is opened in the first side wall, the second communicating hole includes a first hole section and a second hole section, the first hole section is connected to the second hole section, the first hole section is connected to the exhaust hole, the PCV valve is constructed to be accommodated in the second hole section, and the second hole section is connected to the intake communicating hole through the PCV valve.

[0021] In one possible implementation:

[0022] The timing cover is arranged on one side of the crankcase along the first direction. The engine includes a first cylinder assembly and a second cylinder assembly, the first cylinder assembly is arranged on one side of the crankcase along the second direction, and the second cylinder assembly is arranged on the other side of the crankcase along the second direction. The intake assembly is arranged on one side of the crankcase along the third direction, the intake assembly is connected to the exhaust hole of the oil-gas separator, the intake assembly is connected to the first cylinder assembly on one side along the second direction, and the intake assembly is connected to the second cylinder assembly on the other side along the second direction, so that the gas discharged from the exhaust hole is transported to the first cylinder assembly and the second cylinder assembly via the intake assembly.

[0023] In a third aspect, the present application provides a vehicle, comprising a chassis and the aforementioned engine, wherein the engine is disposed on the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a vehicle according to an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the structure of an engine according to an embodiment of the present application.

[0027] Figure 3 It is a schematic structural diagram of an engine without a timing cover according to an embodiment of the present application.

[0028] Figure 4 Schematic diagram of the structure of a timing cover according to an embodiment of the present application.

[0029] Figure 5 It is a cross-sectional view of an engine according to an embodiment of the present application.

[0030] Figure 6 It is a cross-sectional view of an oil-gas separator according to an embodiment of the present application.

[0031] Figure 7 This is a schematic structural diagram of an oil-gas separator according to an embodiment of the present application.

[0032] Figure 8 for Figure 5 A magnified schematic diagram of the local structure at point VI.

[0033] Fig. 9 This is a cross-sectional view of an engine according to another embodiment of the present application.

[0034] Fig.10 This is a cross-sectional view of an engine according to another embodiment of the present application.

[0035] Fig.11 This is a schematic structural diagram of a timing cover according to another embodiment of the present application.

[0036] Description of main component symbols:

[0037]

[0038]

[0039] DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0043] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0044] See also Figure 1 This embodiment provides a vehicle 200, including a chassis 201 and an engine 100. The engine 100 is disposed on the chassis 201. The vehicle 200 may be, for example, a fuel vehicle (such as a gasoline vehicle, a diesel vehicle), or a hybrid vehicle.

[0045] Further reading Figure 2The engine 100 includes a cylinder block assembly 40 , a crankcase 20 , an intake assembly 30 and a timing cover 10 .

[0046] The cylinder assembly 40 includes a cylinder 41 and a cylinder head cover 42. The cylinder 41 is connected to the crankcase 20, and the cylinder head cover 42 is arranged on the side of the cylinder 41 away from the crankcase 20. The cylinder 41 is used to pass fuel gas and air. The fuel gas is burned in the cylinder assembly 40, and the mixed gas after combustion can flow into the crankcase 20. The mixed gas includes unburned fuel gas, water vapor and combustion exhaust gas. The mixed gas will form an oil-gas mixture after mixing with the engine oil in the crankcase 20. The mixed gas will dilute the engine oil, accelerate the oxidation and deterioration of the engine oil, and reduce the performance of the engine oil. At the same time, the water vapor will condense and mix with the engine oil to form sludge, which is easy to block the oil circuit. In addition, the acidic gas in the mixed gas is mixed into the lubrication system where the engine oil is located, which will also cause corrosion of the parts of the engine 100 and make the parts easy to wear. In addition, the mixed gas entering the crankcase 20 will also increase the pressure in the crankcase 20, and cause the sealing performance of the crankcase 20 to decrease, causing problems such as oil leakage and loss.

[0047] The intake assembly 30 is connected to one side of the crankcase 20 , and is in communication with the cylinder assembly 40 . The intake assembly 30 is configured to allow air from the external environment of the engine 100 to enter the intake assembly 30 and be transported to the cylinder assembly 40 through the intake assembly 30 , thereby providing fresh air for the cylinder assembly 40 .

[0048] See also Figure 3 and Figure 4 The crankcase 20 opens a crank chamber Q1 (see Figure 4 The crankcase 20 also has a first communicating hole 21, which is connected to the crank chamber Q1. The first communicating hole 21 is configured to allow the oil-air mixture in the crank chamber Q1 to be discharged to the outside of the crankcase 20. One, two or more first communicating holes 21 may be provided.

[0049] Please continue reading Figure 4 and Figure 5 The timing cover 10 includes a cover body 11 and an oil-gas separator 12. The cover body 11 is connected to the crankcase 20, and a sealed chamber Q2 is formed between the cover body 11 and the crankcase 20. The sealed chamber Q2 is connected to the crankshaft chamber Q1 through the first connecting hole 21, so that the oil-gas mixture in the crankcase 20 can be transported to the sealed chamber Q2 through the first connecting hole 21. The sealed chamber Q2 is used to install the timing gear train. In addition, the intake assembly 30, the cylinder assembly 40, the crankshaft chamber Q1, the sealed chamber Q2 and the oil-gas separator 12 are connected in sequence and constitute the ventilation channel of the engine 100.

[0050] In one embodiment, the oil-gas separator 12 is surrounded by the crankcase 20 and the cover body 11 so that the oil-gas separator 12 is completely contained in the sealed cavity Q2. The oil-gas separator 12 is provided with an air inlet 121, an air outlet 122 and an oil return port 123. The air inlet 121 and the oil return port 123 are arranged at intervals, and the air inlet 121 and the oil return port 123 are both connected to the sealed cavity Q2, and the air outlet 122 is connected to other spaces except the sealed cavity Q2 and the crankshaft cavity Q1. The oil-gas separator 12 is configured to separate the oil-gas mixture into engine oil and mixed gas, and discharge the engine oil from the oil return port 123, and discharge the mixed gas from the air outlet 122.

[0051] According to the timing cover 10 of this embodiment, when the engine 100 is running, the oil-gas mixture (i.e., blowby gas) in the crankcase 20 can be discharged into the sealed chamber Q2 through the first connecting hole 21, and the oil-gas mixture entering the sealed chamber Q2 enters the oil-gas separator 12 through the air inlet 121. The oil-gas separator 12 separates the oil-gas mixture into engine oil and mixed gas, and the mixed gas includes unburned fuel gas, water vapor, and combustion exhaust gas, etc. The mixed gas is discharged to the outside of the sealed chamber Q2 and the crank chamber Q1 through the exhaust hole 122, thereby greatly reducing the possibility of contamination of the engine oil in the crankcase 20 and the engine oil in the sealed chamber Q2, and extending the service life of the engine oil in the crankcase 20 and the engine oil in the sealed chamber Q2. The engine oil is discharged from the oil return port 123 to achieve the function of reuse.

[0052] The timing cover 10 of this embodiment makes full use of the sealed cavity Q2 surrounded by the cover body 11 and the crankcase 20, so that the oil-gas separator 12 does not need to be placed outside the body of the engine 100, while ensuring the ventilation performance of the crankcase 20, reducing the overall size of the engine 100. At the same time, the cover body 11 can play a heat insulation role between the oil-gas separator 12 and the external environment. When the external environment temperature is low, the sealed cavity Q2 can still maintain a relatively high temperature, reducing the possibility of condensation or freezing of water vapor in the oil-gas separator 12, thereby greatly alleviating the oil-gas freezing problem of the oil-gas separator 12 and ensuring the operating reliability of the crankcase 20 ventilation system. In addition, the cover body 11 can also protect the oil-gas separator 12. After the oil-gas separator 12 is integrated into the timing cover 10, the oil-gas separator 12 is not easily damaged by direct collision during the assembly, transportation and operation of the engine 100 and the vehicle 200, thereby extending the service life of the oil-gas separator 12.

[0053] In this embodiment, see Figure 4The cover body 11 includes a bottom plate 111 and a surrounding plate 112. The surrounding plate 112 is connected to the edge of the bottom plate 111 and forms a first mounting groove 113 with the bottom plate 111. The first mounting groove 113 constitutes a part of the sealed cavity Q2. In one implementation of this embodiment, the oil-gas separator 12 can be disposed in the first mounting groove 113, and the oil-gas separator 12 can be fixed to the bottom plate 111 or the surrounding plate 112.

[0054] In this embodiment, see Figure 6 The oil-gas separator 12 further includes an oil-gas separation structure 128. The oil-gas separation structure 128 is used to separate the oil-gas mixture into engine oil and mixed gas. The oil-gas separation structure 128 can be set as a labyrinth baffle structure or a cyclone separation structure, and the specific structure of the oil-gas separation structure 128 can be adjusted according to actual needs.

[0055] In this embodiment, see Figure 6 The oil-gas separator 12 includes a bottom wall 124 and a surrounding wall 125. The bottom wall 124 is provided with an oil return port 123. The surrounding wall 125 is connected to the bottom wall 124 and forms an oil-gas separation groove 1263 with one end open with the bottom wall 124. The oil-gas separation structure 128 is installed in the oil-gas separation groove 1263. The air inlet 121, the air outlet 122 and the oil return port 123 are all connected to the oil-gas separation groove 1263. The cross-sectional area of ​​the surrounding wall 125 gradually decreases in the direction close to the bottom wall 124. The surrounding wall 125 is provided with an air inlet 121 and an air outlet 122 arranged at intervals. After the oil-gas separation structure 128 separates the oil-gas mixture into engine oil and mixed gas, the engine oil can flow from the surface of the surrounding wall 125 toward the bottom wall 124 under the action of its own gravity, and then be discharged into the sealed cavity Q2 through the oil return port 123 at the bottom wall 124. The air inlet 121 and the air outlet 122 are spaced apart from each other to ensure that the oil-gas mixture is adequately separated.

[0056] In this embodiment, see Figure 6 The oil-gas separator 12 further includes a cover plate 1261. The cover plate 1261 covers the open end of the oil-gas separation groove 1263 and forms an oil-gas separation chamber Q3 with the oil-gas separation groove 1263. The oil-gas separation structure 128 is disposed in the oil-gas separation chamber Q3.

[0057] In this embodiment, see Figure 6 The oil-gas separation structure 128 includes a plurality of oil-gas separation baffles 1281, one end of each of the plurality of oil-gas separation baffles 1281 is fixed to the cover plate 1261, and the other end of each of the plurality of oil-gas separation baffles 1281 is spaced apart from the bottom wall 124. The plurality of oil-gas separation baffles 1281 are spaced apart along the length direction of the oil-gas separator 12. The oil-gas mixture collides with the oil-gas separation baffles 1281 during the circulation process in the oil-gas separator 12, and is gathered into heavier oil droplets, which can be discharged into the sealed cavity Q2 through the oil return port 123 under the action of their own gravity.

[0058] Optionally, along the direction from the air inlet 121 to the air outlet 122 , the distance between the multiple oil-gas separation baffles 1281 and the bottom wall 124 gradually increases, thereby fully increasing the overall collision area between the oil-gas mixture and the multiple oil-gas separation baffles 1281 , so as to improve the overall oil separation efficiency of the multiple oil-gas separation baffles 1281 .

[0059] In other embodiments, the distance between the oil-gas separation baffle 1281 and the bottom wall 124 can be adjusted according to actual needs. In another embodiment, the oil-gas separation baffle 1281 includes a plurality of first baffles and a plurality of second baffles. The plurality of first baffles are all fixed to the cover plate 1261, and the plurality of second baffles are all fixed to the bottom wall 124. The plurality of first baffles and the plurality of second baffles are sequentially staggered along the length direction of the oil-gas separator 12.

[0060] In this embodiment, the air inlet 121 is located at one end of the oil-gas separator 12 in the length direction, and the air outlet 122 is located at the other end of the oil-gas separator 12 in the length direction to ensure that the oil-gas mixture fully passes through the oil-gas separation structure 128, thereby improving the separation reliability of the engine oil and the mixed gas.

[0061] In this embodiment, see Figure 6 and Figure 7 The surrounding wall 125 includes a first end wall 1251, a second end wall 1252, a first side wall 1253 and a second side wall 1254. The first side wall 1253 and the second side wall 1254 are spaced apart along the width direction of the oil-gas separator 12. The first end wall 1251 is connected to one end of the first side wall 1253 and the second side wall 1254, and the second end wall 1252 is connected to the other end of the first side wall 1253 and the second side wall 1254. The first end wall 1251 is provided with an air inlet 121. The first side wall 1253 is provided with an air outlet 122 on a side away from the first end wall 1251 along its length direction. In this way, it is ensured that the distance between the air inlet 121 and the air outlet 122 is large to ensure sufficient separation of the engine oil and the mixed gas.

[0062] In this embodiment, see Figure 6 The bottom wall 124 includes a first wall section 1242 and a second wall section 1243. The first wall section 1242 is roughly parallel to the horizontal plane. The first wall section 1242 is connected to the first end wall 1251, and the oil return port 123 is arranged in the first wall section 1242. The second wall section 1243 is bent and connected to the first wall section 1242, and the second wall section 1243 is connected to the second end wall 1252. The first wall section 1242 is inclined upward in the direction close to the air inlet 121, so that the oil separated by the oil-gas separation baffle 1281 flows to the first wall section 1242 under the action of gravity, and is discharged from the oil return port 123. The specific structure of the bottom wall 124 can be adjusted according to actual needs, as long as the timing gear train in the sealing chamber Q2 is avoided.

[0063] In this embodiment, see Figure 6 and Figure 7 The oil-gas separator 12 also includes a shielding cover 127. The shielding cover 127 is connected to the first end wall 1251, and the shielding cover 127 is arranged on the outer side of the air inlet 121. The shielding cover 127 and the first end wall 1251 enclose an air intake space 1271, and the air intake space 1271 has an opening 1272 facing the crankcase 20. In this way, the gap between the opening 1272 and the sealing chamber Q2 is small, and the splashing oil generated when the timing gear train is running will be blocked by the shielding cover 127, thereby greatly reducing the possibility of the oil in the sealing chamber Q2 entering the air intake space 1271 and entering the oil-gas separation chamber Q3 from the air inlet 121, so as to avoid the oil interfering with the oil-gas separator 12 in separating the oil-gas mixture. In other embodiments, according to the different installation positions of the oil-gas separator 12, the direction of the opening 1272 can also be adjusted accordingly.

[0064] In this embodiment, see Figure 6 The timing cover 10 further includes a one-way valve 129, which is disposed at the oil return port 123. The one-way valve 129 is configured to allow the oil separated by the oil-gas separator 12 to be discharged to the sealed chamber Q2 in one direction. In this way, the one-way valve 129 can prevent the oil splashed during the operation of the timing gear train from entering the oil-gas separation chamber Q3 from the oil return port 123, thereby reducing the possibility of the oil entering the oil-gas separation chamber Q3 from the oil return port 123, thereby improving the oil separation efficiency of the oil-gas separator 12.

[0065] The opening pressure of the one-way valve 129 can be adjusted according to actual needs to ensure that the engine oil can be discharged from the one-way valve 129 under the action of its own gravity.

[0066] In this embodiment, see Figure 6 The bottom wall 124 is also provided with a connecting ring 1241. The connecting ring 1241 is provided with a mounting hole 1244, and the mounting hole 1244 is connected to the oil-gas separation chamber Q3. The end of the mounting hole 1244 away from the bottom wall 124 is formed as an oil return port 123. The mounting hole 1244 is configured to accommodate the one-way valve 129. In this way, the installation convenience of the one-way valve 129 can be improved.

[0067] In this embodiment, see Figure 6The oil-gas separator 12 further includes a connecting ear 1262. The connecting ear 1262 is connected to the surrounding wall 125. The oil-gas separator 12 passes through the connecting ear 1262 and is fixed to the first side wall 22 by a fastening structure such as a screw. In another embodiment, the oil-gas separator 12 can pass through the connecting ear 1262 and be fixed to the bottom plate 111 or the surrounding plate 112 of the cover body 11 by a fastening structure such as a screw, so that the timing cover 10 can be pre-assembled. In the process of assembling the engine 100, the timing cover 10 can be directly installed on the crankcase 20, thereby improving the assembly efficiency of the engine 100.

[0068] In this example, please refer again to Figure 4 The crankcase 20 includes a first side wall 22. The first side wall 22 and the cover body 11 form a sealed cavity Q2. The first side wall 22 defines a first connecting hole 21, and the first side wall 22 also defines a second connecting hole 50. One end of the second connecting hole 50 is connected to the exhaust hole 122, and the other end of the second connecting hole 50 is connected to other spaces outside the sealed cavity Q2 and the crank cavity Q1. In this embodiment, the other end of the second connecting hole 50 can be connected to the intake assembly 30.

[0069] In this embodiment, see Figure 4 The crankcase 20 also includes a second side wall 23. The first side wall 22 and the second side wall 23 are connected by bending. The intake assembly 30 is arranged on the second side wall 23, and the intake assembly 30 is provided with an intake connecting hole 312, and the exhaust hole 122 is connected with the intake connecting hole 312 through the second connecting hole 50. In this way, the crank chamber Q1 of the crankcase 20 is connected with the sealing chamber Q2 through the first connecting hole 21, and the sealing chamber Q2 is connected with the oil-gas separation chamber Q3 of the oil-gas separator 12, and the oil-gas separation chamber Q3 is connected to the intake assembly 30 through the exhaust hole 122, the second connecting hole 50 and the intake connecting hole 312, and the intake assembly 30 is connected to the cylinder assembly 40, and the blowby gas generated in the combustion chamber of the cylinder assembly 40 is discharged to the crankcase 20, thereby forming a complete ventilation channel in the engine 100.

[0070] In this embodiment, see Figure 4 The intake assembly 30 includes a resonance chamber 31. The resonance chamber 31 is disposed at one side of the crankcase 20. The resonance chamber 31 opens a resonance cavity 314, and an intake communication hole 312 is opened in the resonance chamber 31. The intake communication hole 312 communicates with the resonance cavity 314. The resonance chamber 31 is also connected to the cylinder assembly 40 to transport the gas in the resonance cavity 314 to the cylinder assembly 40.

[0071] In this way, after the mixed gas separated by the oil-gas separator 12 enters the resonance cavity 314, the gas pressure in the resonance cavity 314 fluctuates. The pressure fluctuation of the gas can form a resonance effect in the resonance cavity 314, thereby increasing the gas pressure in the pipeline between the resonance chamber 31 and the cylinder assembly 40, so that the mixed gas is discharged faster and the output power of the engine 100 is improved.

[0072] In this embodiment, see Figure 4 The crankcase 20 further includes an extension wall 24. The extension wall 24 is connected to the edge of the first side wall 22 and extends toward the cover body 11. The extension wall 24 and the first side wall 22 form a second mounting groove 25. The side of the extension wall 24 facing away from the first side wall 22 is connected to the surrounding wall 125. The second mounting groove 25 and the first mounting groove 113 together form a sealed cavity Q2.

[0073] In this embodiment, refer to Figure 8 , the exhaust hole 122 of the oil-gas separator 12 is sealed and connected to the second connecting hole 50. The first side wall 1253 of the oil-gas separator 12 is attached to the first side wall 22, so that the exhaust hole 122 is directly connected to the second connecting hole 50, thereby improving the sealing performance of the exhaust hole 122 and the second connecting hole 50. At the same time, a sealing structure such as a sealing ring (not shown in the figure) can be provided between the exhaust hole 122, the oil-gas separator 12 and the first side wall 22, thereby further improving the sealing performance of the exhaust hole 122 and the second connecting hole 50.

[0074] In this embodiment, refer to Figure 8 The engine 100 further includes a PCV (Positive Crankcase Ventilation) valve 60, one end of which is configured to be received in the second communication hole 50, and the other end of which is configured to be received in the intake communication hole 312. The second communication hole 50 is connected to the intake communication hole 312 through the PCV valve 60.

[0075] When the engine 100 is in different working conditions, the PCV valve 60 can adjust the flow of the mixed gas entering the intake assembly 30. For example, when the engine 100 is in a low-load working condition, the opening of the PCV valve 60 is small or closed, the flow of the mixed gas entering the intake assembly 30 is small, and the gas backflow in the intake assembly 30 can be prevented. When the engine 100 is in a high-load working condition, the opening of the PCV valve 60 is large, and the flow of the mixed gas entering the intake assembly 30 is large. The PCV valve 60 is directly accommodated in the second connecting hole 50 and the intake connecting hole 312, which can improve the installation stability of the PCV valve 60, reduce the application of the pipeline structure, and improve the integration of the engine 100.

[0076] In this embodiment, see Figure 8The resonance chamber 31 includes a resonance wall 311. The resonance wall 311 is provided at one side of the crankcase 20. The intake communicating hole 312 is provided at the resonance wall 311. The PCV valve 60 includes a first end 61 and a second end 62. The first end 61 is fitted in the intake communicating hole 312, and the second end 62 is fitted in the second communicating hole 50.

[0077] Alternatively, see Figure 8 The resonance chamber 31 further includes a first communication protrusion 313. The first communication protrusion 313 is protruded from the inner surface of the resonance wall 311, and the first communication protrusion 313 defines an intake communication hole 312. The first end portion 61 is sealed and fitted in the intake communication hole 312 of the first communication protrusion 313. In this way, the installation reliability of the PCV valve 60 can be improved.

[0078] In this embodiment, see Figure 8 The engine 100 further includes a sealing member 70, which is sleeved on the outer periphery of the first end portion 61 of the PCV valve 60 and seals against the inner surface of the first communication protrusion 313 to improve the sealing between the PCV valve 60 and the first communication protrusion 313, and greatly reduce the possibility of leakage of the mixed gas from the intake communication hole 312. Optionally, the sealing member 70 can be set as a sealing ring. In other embodiments, a sealing structure can also be set in the gap between the second end portion 62 and the second communication hole 50.

[0079] In this embodiment, see Figure 8 The second communication hole 50 includes a first hole section 51 and a second hole section 52. The first hole section 51 and the second hole section 52 are both opened in the first side wall 22, the first hole section 51 is connected with the second hole section 52, the first hole section 51 is connected with the exhaust hole 122, and the second hole section 52 is connected with the intake communication hole 312. The second end portion 62 is configured to be accommodated in the second hole section 52.

[0080] The first hole section 51 can play the role of connecting the second hole section 52 and the exhaust hole 122, so that the mixed gas discharged from the oil-gas separator 12 enters the first hole section 51, and then is transported to the intake connecting hole 312 through the PCV valve 60, and then transported to the resonance cavity 314 of the intake assembly 30. Since the first hole section 51 and the second hole section 52 are both opened on the first side wall 22, it is not necessary to set an additional pipeline structure between the crankcase 20 and the intake assembly 30, thereby improving the integration of the engine 100 and reducing the volume of the engine 100. After the PCV valve 60 is accommodated in the second hole section 52 and the intake connecting hole 312, the middle part of the PCV valve 60 is exposed in the gap between the intake assembly 30 and the crankcase 20, which can improve the installation stability of the PCV valve 60, reduce the possibility of damage to the PCV valve 60, extend the service life of the PCV valve 60, and ensure the reliability of the ventilation channel.

[0081] Optionally, the first hole segment 51 is connected to the second hole segment 52 by bending.

[0082] Optionally, the second end portion 62 is provided with an external thread, and the second hole section 52 is provided with an internal thread, and the internal thread is threadedly connected with the external thread, thereby improving the installation stability of the PCV valve 60, and the partial threaded connection can also play a certain sealing effect. In other embodiments, a sealing ring can also be provided between the second end portion 62 and the second hole section 52, or a pin is tightly fitted to achieve a sealing effect between the second end portion 62 and the second side wall 23.

[0083] The position of the second connecting hole 50 can be adjusted according to actual needs. For example, in another embodiment, Fig. 9 The second connecting hole 50 is opened at the extending wall 24 .

[0084] In this embodiment, refer to Figure 2 and Figure 3 , the engine 100 is a horizontally opposed engine. The timing cover 10 is arranged on one side of the crankcase 20 along the first direction X. The horizontally opposed engine includes a first cylinder assembly 40a and a second cylinder assembly 40b. The first cylinder assembly 40a is arranged on one side of the crankcase 20 along the second direction Y. The second cylinder assembly 40b is arranged on the other side of the crankcase 20 along the second direction Y. The intake assembly 30 is arranged on one side of the crankcase 20 in the third direction Z upward. The resonance chamber 31 is located on one side of the crankcase 20 in the third direction Z upward. The intake assembly 30 also includes a first intake manifold 32 and a second intake manifold 33. The first intake manifold 32 is connected between one side of the resonance chamber 31 in the second direction Y and the first cylinder assembly 40a. The second intake manifold 33 is connected between the other side of the resonance chamber 31 in the second direction Y and the second cylinder assembly 40b. Among them, the first direction X, the second direction Y and the third direction Z are three directions of the vehicle coordinate system of the vehicle. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. In other embodiments, the first direction X, the second direction Y and the third direction Z may also be set to three different directions of other coordinate systems.

[0085] The horizontally opposed engine 100 is longer in the second direction Y, and the timing cover 10 is arranged on one side of the crankcase 20 along the first direction X, so that the sealing cavity Q2 formed between the timing cover 10 and the crankcase 20 is larger in size and has a certain amount of surplus space, which is conducive to the installation of the oil-gas separator 12.

[0086] In other embodiments, the engine 100 may be configured as a V-type engine, wherein the first cylinder assembly 40 a and the second cylinder assembly 40 b of the V-type engine are disposed at an angle.

[0087] When the engine 100 is a V-type engine, the space of the sealed cavity Q2 defined between the timing cover 10 and the crankcase 20 of the V-type engine is also relatively large, and the space therein can be fully utilized to install the oil-gas separator 12, thereby improving the integration of the engine.

[0088] When the engine 100 is an in-line engine, the installation position of the timing gear train in the timing cover 10 can be adjusted to reserve an installation area for the oil-gas separator 12 , thereby installing the oil-gas separator 12 in the cover body 11 .

[0089] Therefore, the timing cover 10 of the present embodiment can be installed in different engines, and its specific structure can be adjusted accordingly according to the specific type of the engine, which is not specifically limited here.

[0090] Fig. 9 An engine 100a according to another embodiment of the present application is shown. Figure 8 The difference between the engine 100 in FIG. 1 and FIG. 2 is that the second communication hole 50 is opened in the extension wall 24 of the crankcase 20 .

[0091] In this embodiment, the oil separator 12 is fixed to the timing cover 10, and the exhaust hole 122 of the oil separator 12 is directly connected to the second communication hole 50. During the assembly of the engine 100a, the timing cover 10 can be assembled as a separate component to improve the assembly efficiency of the engine 100a.

[0092] Optionally, the oil-gas separator 12 may also be fixed to the first side wall 22 or the extension wall 24. The exhaust hole 122 may be provided on the cover plate 1261.

[0093] In this embodiment, the extension wall 24 is provided with a second communication protrusion 26, the second communication protrusion 26 defines a second communication hole 50, and the first end portion 61 is sealed and fitted in the second communication protrusion 26. In this way, the installation reliability of the PCV valve 60 can be improved.

[0094] Fig.10 The engine 100b of another embodiment of the present application is shown. Figure 8 The difference of the engine 100 in FIG. 1 is that the second connecting hole 50 is opened in the timing cover 10 , the oil-gas separator 12 is fixed to the timing cover 10 , and the exhaust hole 122 of the oil-gas separator 12 is directly connected to the second connecting hole 50 .

[0095] In this way, during the whole assembly process of the engine 100 b , the timing cover 10 can be assembled as a separate component, thereby improving the assembly efficiency of the engine 100 b .

[0096] Optionally, the oil-gas separator 12 may also be fixed to the first side wall 22 or the extension wall 24. The exhaust hole 122 may be provided on the cover plate 1261.

[0097] In this embodiment, see Fig.10 The enclosure plate 112 is provided with a third communication protrusion 114, the third communication protrusion 114 defines a second communication hole 50, and the first end portion 61 is sealed and fitted in the third communication protrusion 114. In this way, the installation reliability of the PCV valve 60 can be improved.

[0098] Fig.11 A timing cover 10a according to another embodiment of the present invention is shown. Figure 5 The difference between the timing cover 10 in FIG. 1 and FIG. 2 is that the oil-gas separator 12 is spaced apart from the enclosure 112 of the cover body 11 .

[0099] See also Fig.11 The timing cover 10a further includes a connecting pipe 13, which is disposed in the sealed cavity Q2. For example, the connecting pipe 13 can be disposed in the first mounting groove 113. The connecting pipe 13 is connected between the exhaust hole 122 of the oil-gas separator 12 and the second connecting hole 50 (not shown in the figure). In this way, the position of the oil-gas separator 12 in the sealed cavity Q2 can be adjusted according to the actual structure of the timing gear train to avoid the timing gear train, so that the timing cover 10a of this embodiment can be applied to other types of engines (such as in-line engines), thereby improving the application range of the timing cover 10.

[0100] Optionally, the connecting pipe 13 may be made of a rigid structure to improve the stability of the connecting pipe 13. The rigid structure may be specifically made of steel.

[0101] Optionally, the exhaust hole 122 of the oil-gas separator 12 of the present embodiment may be disposed on the second end wall 1252 , so that the connecting pipe 13 can be directly connected to the oil-gas separator 12 .

[0102] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A timing cover, the timing cover is applied to an engine, the engine comprises a crankcase, the crankcase has a crankshaft cavity, and is characterized in that: The timing cover comprises: A cover body, the cover body is connected to the crankcase, and a sealed cavity is formed between the cover body and the crankcase; the crankcase is also provided with a first communicating hole, the first communicating hole communicates the sealed cavity and the crankshaft cavity, and the first communicating hole is configured to allow the oil-gas mixture in the crankshaft cavity to enter the sealed cavity; An oil-gas separator is arranged in the sealed cavity. The oil-gas separator is provided with an air inlet hole, an air outlet hole and an oil return port. The air inlet hole and the oil return port are spaced apart. The air inlet hole and the oil return port are both connected to the sealed cavity. The air outlet hole is connected to the outside of the sealed cavity and the crankshaft cavity. The oil-gas separator is constructed to separate the oil-gas mixture into engine oil and mixed gas, and discharge the engine oil from the oil return port to the sealed cavity, and the mixed gas is discharged from the sealed cavity and the crankshaft cavity from the air outlet hole.

2. The timing cover according to claim 1, characterized in that: The oil-gas separator comprises: A bottom wall, wherein the oil return port is provided on the bottom wall; A surrounding wall, wherein the surrounding wall is connected to the bottom wall, and the surrounding wall and the bottom wall form an oil-gas separation chamber. The cross-sectional area of ​​the surrounding wall gradually decreases in a direction approaching the bottom wall, and the air inlet and the air outlet are both provided in the surrounding wall.

3. The timing cover according to claim 2, characterized in that: The timing cover further includes a one-way valve, which is disposed at the oil return port and is configured to allow the engine oil separated by the oil-gas separator to be discharged to the sealing chamber in one direction.

4. The timing cover according to claim 2, characterized in that: The crankcase or the cover body is further provided with a second communicating hole, one end of which is connected to the outside of the sealing cavity and the crankshaft cavity; The surrounding wall is arranged on the surface of the crankcase, and the exhaust hole is sealed and connected to the other end of the second connecting hole.

5. An engine, characterized in that: include: A crankcase, wherein the crankcase is provided with a crank chamber, and the crankcase is provided with a first communicating hole; The timing cover according to any one of claims 1 to 4, wherein the timing cover is connected to the crankcase and forms a sealed cavity with the crankcase, and the sealed cavity is connected to the crankshaft cavity through the first connecting hole.

6. The engine according to claim 5, characterized in that The engine also includes: A cylinder assembly, the cylinder assembly is connected to the crankcase, the cylinder assembly is also communicated with the crankcase, and the oil-gas mixture of the cylinder assembly can be delivered to the crankshaft chamber; An intake assembly is connected to the crankcase, an intake connecting hole is provided in the intake assembly, the intake connecting hole is connected to the exhaust hole, and the intake assembly is also connected to the cylinder assembly. The intake assembly, the cylinder assembly, the crankshaft chamber, the sealing chamber and the oil-gas separator are connected in sequence and constitute a ventilation channel of the engine.

7. The engine according to claim 6, characterized in that: The crankcase or the cover body is provided with a second communicating hole, and the second communicating hole is sealed and connected with the exhaust hole; The engine further includes a PCV valve, one end of the PCV valve is configured to be accommodated in the second communicating hole, the other end of the PCV valve is configured to be accommodated in the intake communicating hole, and the second communicating hole is communicated with the intake communicating hole through the PCV valve.

8. The engine according to claim 7, characterized in that: The crankcase includes a first side wall, the timing cover is connected to the first side wall and forms a sealed cavity with the first side wall, the second communicating hole is opened in the first side wall, the second communicating hole includes a first hole section and a second hole section, the first hole section is connected to the second hole section, the first hole section is connected to the exhaust hole, the PCV valve is constructed to be accommodated in the second hole section, and the second hole section is connected to the intake communicating hole through the PCV valve.

9. The engine according to claim 6, characterized in that: The timing cover is arranged on one side of the crankcase along the first direction; The engine comprises a first cylinder assembly and a second cylinder assembly, wherein the first cylinder assembly is arranged on one side of the crankcase along the second direction, and the second cylinder assembly is arranged on the other side of the crankcase along the second direction; The air intake assembly is arranged on one side of the crankcase along the third direction, the air intake assembly is connected to the exhaust hole of the oil-gas separator, the air intake assembly is connected to the first cylinder assembly on one side along the second direction, and the air intake assembly is connected to the second cylinder assembly on the other side along the second direction, so that the gas discharged from the exhaust hole is transported to the first cylinder assembly and the second cylinder assembly via the air intake assembly.

10. A vehicle, characterized in that: The invention comprises a chassis and an engine as claimed in any one of claims 5 to 9, wherein the engine is arranged on the chassis.

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