Engine cover and engine

Abstract

The engine cover cap comprises a cover cap body and a cover plate installed on the cover cap body in a matched mode, a cavity allowing oil gas to circulate is formed between the cover cap body and the cover plate, and the cover plate is provided with an air inlet portion. The air inlet part comprises a bottom plate, side plates located on the two sides of the bottom plate and a front plate located between one ends of the two side plates, the bottom plate, the two side plates and the front plate jointly define an air inlet channel, a separator is arranged at the top of the air inlet channel, and a gap is formed between the bottom of the separator and the bottom plate. According to the engine cover cap, the separator is arranged at the top of the gas inlet channel to lengthen the oil-gas channel, and gas is divided into small gas flows at the beginning of entering the oil-gas separation cavity from the gas inlet channel, so that the gas flow rate is increased, small oil in the gas flows is separated out, and the separation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle engines, and in particular relates to an engine cover and an engine comprising the engine cover. Background Art

[0002] For automotive engines, if the oil mist from the piston leakage flows into the intake system and participates in combustion, it will increase the emission of automobile exhaust. The use of labyrinth covers can not only reduce emissions, but also reduce oil consumption and increase intake volume. Therefore, with increasingly stringent emission regulations, the development of high-performance labyrinth covers is becoming more and more important. Due to the small layout space inside the labyrinth cover and the relatively simple structure, it is generally integrated on the engine hood, which is a cover on the engine cylinder to prevent external impurities from entering the engine. In order to reduce the operating cost of the engine and to minimize the discharge of oil with oil and gas, most of the existing engine hoods are integrated with oil and gas separation devices.

[0003] However, the oil and gas passage in the oil and gas separation structure of the existing labyrinth cover is relatively short, and the air inlet structure of the labyrinth cover is relatively simple, resulting in that only large oil droplets can be filtered, and the separation efficiency is low. Utility Model Content

[0004] In view of this, in order to solve the problems in the prior art, the utility model provides an engine hood with an improved structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An engine hood includes a hood body and a cover plate mounted on the hood body, a cavity for oil and gas circulation is formed between the hood body and the cover plate, an air intake portion is provided on the cover plate, the air intake portion includes a bottom plate, side plates located on both sides of the bottom plate and a front plate located between one end of the two side plates, the bottom plate, the two side plates and the front plate are enclosed together to form an air intake channel, a separator is provided on the top of the air intake channel, and a gap is provided between the bottom of the separator and the bottom plate. Such a setting is conducive to increasing the length of the cavity (oil and gas separation chamber).

[0007] According to some preferred implementation aspects of the utility model, the separator includes a fixing plate, and a plurality of through grooves penetrating the fixing plate in a thickness direction are formed on the fixing plate.

[0008] According to some preferred implementation aspects of the utility model, the separator further comprises a fixing rod disposed in each of the through slots and blades fixedly connected to the fixing rod, and each of the fixing rods is provided with a plurality of blades.

[0009] According to some preferred implementation aspects of the utility model, the plurality of blades on each fixed rod are arranged at intervals around the circumference of the fixed rod, one end of the blade is fixedly connected to the outer wall of the fixed rod, and the other end of the blade is fixedly connected to the inner wall of the through groove. The blade structure is used to divide the gas about to enter the cavity into small airflows, thereby increasing the flow rate, and inertia is used to separate smaller oil in the airflow, thereby improving the cover plate's ability to adsorb oil at the air inlet channel.

[0010] In addition, according to the principles of fluid mechanics, a separator is set at the top of the air inlet channel to lengthen the oil and gas channel, and a blade structure is set in each through groove to accelerate the gas flow rate. A large number of oil droplets can be separated when the gas just begins to enter the oil and gas separation chamber from the air inlet channel, thereby greatly improving the separation efficiency.

[0011] According to some preferred implementation aspects of the utility model, the blades are arranged at an inclination, and the inclination angles of the blades on each of the fixing rods are different.

[0012] According to some preferred implementation aspects of the utility model, the top surface of the through groove is flush with the top surface of the air intake channel; the shape of the top of the fixing plate is the same as the shape of the top surface of the air intake channel.

[0013] According to some preferred implementation aspects of the utility model, the cover plate is further provided with an oil return channel and two oil-gas separation boxes, the two oil-gas separation boxes are arranged between the air inlet and the oil return channel, and one oil-gas separation box is located between the separator and the other oil-gas separation box. The space formed between the two oil-gas separation boxes and the cover body can provide a buffering effect for the oil from one fine separation process to the next fine separation process.

[0014] According to some preferred implementation aspects of the utility model, the cover plate includes a first top plate and a second top plate, the first top plate and the second top plate are both inclined, the oil return channel is located between the first top plate and the second top plate, and the two oil-gas separation boxes are both fixedly arranged on the top surface of the first top plate. In some embodiments of the utility model, the first top plate and the second top plate are both arranged gradually close to the oil return channel from one end close to the separator to the other end.

[0015] According to some preferred implementation aspects of the utility model, one end of the first top plate away from the second top plate is fixedly connected to one end of the two side plates, and a plurality of baffles are arranged at intervals on the top surface of the second top plate.

[0016] The utility model also provides an engine comprising the engine cover as described above.

[0017] Compared with the prior art, the utility model is advantageous in that: the engine hood of the utility model lengthens the oil and gas passage by arranging a separator at the top of the air intake passage, and divides the gas into small air flows when the gas just begins to enter the oil and gas separation chamber from the air intake passage, thereby increasing the gas flow rate, separating smaller oil liquids in the air flow, and greatly improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the engine cover in the preferred embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the engine cover in the preferred embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the cover plate, the oil-gas separation box and the separator after installation in the preferred embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of a separator in a preferred embodiment of the utility model;

[0023] Among them: cover body -1, cover plate -2, air inlet part -21, bottom plate -211, side plate -212, front plate -213, air inlet channel -214, oil return channel -22, first top plate -23, second top plate -24, baffle -25, cavity -3, oil-gas separation box -4, separator -5, fixing plate -51, through groove -52, fixing rod -53, blade -54. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] The engine in this embodiment has Figures 1 to 4The engine hood shown. The engine hood includes a hood body 1 and a cover plate 2 mounted on the hood body 1. A cavity 3 is formed between the hood body 1 and the cover plate 2 for the oil and gas generated by the engine to circulate. The cover plate 2 has an air intake 21, an oil return channel 22 and two oil and gas separation boxes 4. The two oil and gas separation boxes 4 are arranged between the air intake 21 and the oil return channel 22 to block the oil in the oil and gas generated by the engine and leak out through the oil return channel 22; one oil and gas separation box 4 is located between the air intake 21 and the other oil and gas separation box 4.

[0026] Furthermore, if Figure 2 and Figure 3 As shown, the air intake portion 21 includes a bottom plate 211, side plates 212 located on both sides of the bottom plate 211, and a front plate 213 located between one ends of the two side plates 212. The bottom plate 211, the two side plates 212, and the front plate 213 together enclose an air intake channel 214, and an air inlet of the air intake channel 214 intakes air in a direction close to the oil-gas separation box 4.

[0027] like Figures 2 to 4 As shown, a separator 5 is provided at the top of the air inlet passage 214. The separator 5 comprises a fixing plate 51. The fixing plate 51 is provided with a plurality of through slots 52 extending through the thickness direction thereof. A fixing rod 53 and a blade 54 fixedly connected to the fixing rod 53 are provided in each through slot 52. A plurality of blades 54 are provided on each fixing rod 53. The plurality of blades 54 are arranged at intervals around the circumference of the fixing rod 53. Each blade 54 in each through slot 52 is arranged obliquely, and the inclination angles of the blades 54 on each fixing rod 53 are different. One end of the blade 54 is fixedly connected to the outer wall surface of the fixing rod 53, and the other end of the blade 54 is fixedly connected to the inner wall surface of the through slot 52. The blade 54 structure is used to divide the gas about to enter the cavity 3 into small air streams, thereby increasing the flow rate, and inertia is used to separate the smaller oil in the air stream, thereby increasing the adsorption capacity of the cover plate 2 for the oil at the air inlet passage 214 and improving the separation efficiency.

[0028] The top surface of the through groove 52 is flush with the top surface of the air inlet channel 214, and there is a gap between the bottom of the through groove 52 and the bottom plate 211 of the air inlet portion 21, which is conducive to increasing the length of the cavity 3 and improving the separation effect. The top of the fixing plate 51 is in the same shape as the top surface of the air inlet channel 214, ensuring that the fixing plate 51 of the separator 5 can match the top surface of the air inlet channel 214, so that the oil and gas entering the cavity 3 from the air inlet channel 214 can enter from the separator 5.

[0029] Furthermore, if Figure 2As shown, the cover plate 2 includes a first top plate 23 and a second top plate 24, the first top plate 23 is close to the separator 5, and one end of the first top plate 23 away from the second top plate 24 is fixedly connected to one end of the two side plates 212 of the air inlet 21. The first top plate 23 and the second top plate 24 are both inclined, and the first top plate 23 and the second top plate 24 are gradually close to the oil return channel 22 from one end close to the separator 5 to the other end, that is, they are inclined upward and rightward from the end close to the separator 5. The oil return channel 22 is located between the first top plate 23 and the second top plate 24, and the two oil-gas separation boxes 4 are fixedly arranged on the top surface of the first top plate 23, and there is a gap between the two oil-gas separation boxes 4, so that the space formed between the two oil-gas separation boxes 4 and the cover body 1 can provide a buffering effect for the oil from one fine separation process to the next fine separation process. A plurality of baffles 25 are arranged at intervals on the top surface of the second top plate 24 to adsorb the oil.

[0030] The working process of the engine cover in this embodiment is briefly described below:

[0031] When the gas enters the oil-gas separation chamber from the air inlet of the air inlet channel 214, it first passes through the separator 5. The setting of the separator 5 lengthens the oil-gas channel. The blade 54 structure in the separator 5 can effectively divide the airflow to speed up the flow rate, so that the oil is better adsorbed on the blade 54 and gathered together to flow back into the engine. The remaining gas enters the cavity 3, and then passes through an oil-gas separation box 4 close to the separator 5. The oil is buffered in the space between the inner wall of the cover body 1 and the two oil-gas separation boxes 4, and then passes through an oil-gas separation box 4 far away from the separator 5 and gathers together. It flows back into the engine through the separator 5. The baffle 25 on the second top plate 24 adsorbs the oil and then flows back into the engine through the oil return channel 22. Finally, the exhaust gas is discharged through the PCV valve assembly.

[0032] The engine hood of the utility model lengthens the oil and gas channel by arranging a separator 5 at the top of the air intake channel 214, and divides the gas into small air flows when the gas just starts to enter the oil and gas separation chamber from the air intake channel 214, thereby increasing the gas flow rate, separating the smaller oil in the air flow, and greatly improving the separation efficiency.

[0033] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An engine hood, comprising a hood body and a cover plate mounted on the hood body, wherein a cavity for oil and gas to flow is formed between the hood body and the cover plate, and the cover plate has an air intake portion, characterized in that: The air intake portion includes a bottom plate, side plates located on both sides of the bottom plate, and a front plate located between one ends of the two side plates. The bottom plate, the two side plates, and the front plate together form an air intake channel. A separator is provided on the top of the air intake channel, and a gap is provided between the bottom of the separator and the bottom plate.

2. The engine cover according to claim 1, characterized in that: The separator comprises a fixing plate, and a plurality of through slots penetrating the fixing plate in the thickness direction are formed on the fixing plate.

3. The engine cover according to claim 2, characterized in that: The separator further comprises a fixing rod arranged in each of the through slots and blades fixedly connected to the fixing rod, and each of the fixing rods is provided with a plurality of blades.

4. The engine cover according to claim 3, characterized in that: The plurality of blades on each of the fixing rods are arranged at intervals around the circumference of the fixing rod, one end of the blade is fixedly connected to the outer wall surface of the fixing rod, and the other end of the blade is fixedly connected to the inner wall surface of the through groove.

5. The engine cover according to claim 3, characterized in that: The blades are arranged tilted, and the inclination angles of the blades on each of the fixing rods are different.

6. The engine cover according to claim 2, characterized in that: The top surface of the through groove is flush with the top surface of the air intake passage; the shape of the top of the fixing plate is the same as the shape of the top surface of the air intake passage.

7. The engine cover according to claim 2, characterized in that: The cover plate is also provided with an oil return passage and two oil-gas separation boxes, the two oil-gas separation boxes are arranged between the air inlet and the oil return passage, and one oil-gas separation box is located between the separator and the other oil-gas separation box.

8. The engine cover according to claim 7, characterized in that: The cover plate includes a first top plate and a second top plate, the first top plate and the second top plate are both inclined, the oil return channel is located between the first top plate and the second top plate, and the two oil-gas separation boxes are both fixedly arranged on the top surface of the first top plate.

9. The engine cover according to claim 8, characterized in that: One end of the first top plate away from the second top plate is fixedly connected to one end of the two side plates, and a plurality of baffles are arranged at intervals on the top surface of the second top plate.

10. An engine comprising the engine cover according to any one of claims 1 to 9.

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