Engine cover and engine

Abstract

The utility model discloses an engine cover cap which 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, an air inlet is formed in the end of the cavity, a baffle is arranged in the cavity, the extending direction of the baffle is perpendicular to the length direction of the cavity, and the extending direction of the baffle is perpendicular to the length direction of the cavity. The baffle comprises a first blocking part and a second blocking part, an included angle is formed between the first blocking part and the second blocking part, and an opening formed between the first blocking part and the second blocking part faces the air inlet. According to the engine cover cap, the first blocking part and the second blocking part are arranged to form the included angle, and the opening of the first blocking part and the opening of the second blocking part face one side of the air inlet, so that the flowing path of oil-gas airflow is effectively prolonged, larger airflow is better divided into smaller airflow, the flowing speed is increased, oil in gas is more easily adsorbed, and the oil-gas separation effect is improved. More contact areas can be formed between gas and the V-shaped baffle, and the oil-gas separation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model particularly relates to an engine cover and an engine comprising the engine cover. Background Art

[0002] At present, a baffle or baffle rib is provided on the inner wall of the engine hood corresponding to the position of the cover plate air inlet, but the structure is relatively simple and the adsorption effect on oil droplets in the oil gas is limited, and it can only effectively adsorb smaller oil droplets in the airflow. Utility Model Content

[0003] In view of this, in order to solve the problems of the prior art, the utility model provides an engine hood with an improved baffle structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] 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 inlet is provided at the end of the cavity, a baffle is provided in the cavity, the extension direction of the baffle is perpendicular to the length direction of the cavity, the baffle includes a first baffle and a second baffle, an angle is set between the first baffle and the second baffle, and an opening formed between the first baffle and the second baffle faces the air inlet. That is, the distance between the first baffle and the second baffle gradually decreases from the side close to the air inlet to the side away from the air inlet.

[0006] According to some preferred implementation aspects of the utility model, multiple rows of baffles are arranged in the cavity along the flow direction of the oil and gas, each row has multiple baffles, and the baffles in two adjacent rows are arranged in a staggered manner, so as to better divide the larger airflow into smaller airflows and increase the flow rate.

[0007] According to some preferred implementation aspects of the utility model, the width of the baffle is smaller than the distance between two baffles in each row, that is, when the two rows of baffles are projected together, there are overlapping parts between the baffles in the width direction.

[0008] According to some preferred implementation aspects of the utility model, the thickness of the baffle gradually decreases from the bottom to the top. That is, the surface of the baffle facing the air inlet is inclined from bottom to top toward the side away from the air inlet. The airflow is lifted to the middle position in the length direction of the baffle, so as to better contact the baffle.

[0009] According to some preferred implementation aspects of the utility model, a protrusion is provided on the side close to the air inlet where the first stopper and the second stopper are connected, and the surface of the protrusion facing the air inlet is inclined from bottom to top toward the side away from the air inlet, thereby increasing the contact area and lifting the airflow to the middle position in the length direction of the baffle plate for better contact with the baffle plate.

[0010] According to some preferred implementation aspects of the utility model, the inner wall of the cover body has a first baffle extending toward the cover plate, the cover plate has a second baffle extending toward the cover body, and the positions of the first baffle and the second baffle correspond to each other. There is a gap between the first baffle and the second baffle, and the gap is preferably located on different planes to further improve the separation effect.

[0011] According to some preferred implementation aspects of the present invention, the angle between the first stop portion and the second stop portion is 90-150°, preferably 120°.

[0012] According to some preferred implementation aspects of the utility model, the first stopper and the second stopper are symmetrically arranged. The first stopper and the second stopper are arranged in a V shape.

[0013] According to some preferred implementation aspects of the utility model, the edges of the baffles are all arranged in an arc shape.

[0014] According to some preferred implementation aspects of the utility model, a first oil return channel and / or a second oil return channel is provided on the cover plate, the first oil return channel and the second oil return channel are both provided on the side of the baffle away from the air inlet, and the first oil return channel is arranged between the baffle and the second oil return channel.

[0015] According to some preferred implementation aspects of the utility model, an oil-gas separation box is installed between the cover body and the cover plate, and the oil-gas separation box is located between the first oil return channel and the second oil return channel.

[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, by providing a first baffle and a second baffle arranged at an angle, and with its opening facing the side of the air inlet, effectively extends the flow path of the oil and gas airflow, better divides a larger airflow into a smaller airflow, increases the flow rate, makes it easier to adsorb the oil in the gas, and allows the gas to have more contact area with the V-shaped baffle, effectively improving the efficiency of oil and gas separation. 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 1It is a schematic diagram of the cross-sectional structure of the engine cover in the preferred embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the cover body 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 in the preferred embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the top view of the baffle in the preferred embodiment of the utility model;

[0023] Among them: cover body -1, cover plate -2, cavity -3, air inlet -4, first stopper -51, second stopper -52, protrusion -53, first baffle -61, second baffle -62, first oil return channel -71, second oil return channel -72, installation groove -8. 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 Figure 1-4 The 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 (oil-gas separation cavity) for oil and gas circulation is formed between the hood body 1 and the cover plate 2. An air inlet 4 is provided at one end of the cavity 3. A baffle is provided in the cavity 3. The extension direction of the baffle is perpendicular to the length direction of the cavity 3. The edges of the baffle are all arranged in an arc shape.

[0026] Multiple rows of baffles are arranged in the cavity 3 along the flow direction of the oil and gas, and each row has multiple baffles. The baffles on two adjacent rows are arranged in a staggered manner to better divide the larger airflow into smaller airflows and increase the flow rate. The width of the baffle is smaller than the distance between the two baffles in each row. That is, when the two rows of baffles are projected together, there are overlapping parts between the baffles in the width direction, which effectively extends the flow path of the oil and gas airflow.

[0027] In this embodiment, the cover plate 2 is provided with a first oil return channel 71 and a second oil return channel 72, both of which are provided on the side of the baffle away from the air inlet 4, and the first oil return channel 71 is arranged between the baffle and the second oil return channel 72. An oil-gas separation box (not shown) is arranged in the cavity 3 between the first oil return channel 71 and the second oil return channel 72. The cover body 1 and the cover plate 2 are provided with a mounting groove 8, and the oil-gas separation box is arranged in the mounting groove 8.

[0028] In this embodiment, the inner wall of the cover body 1 has a first baffle 61 extending toward the cover plate 2, and the cover plate 2 has a second baffle 62 extending toward the cover body 1, and the positions of the first baffle 61 and the second baffle 62 correspond to each other. There is a gap between the first baffle 61 and the second baffle 62, and the gap is preferably located on different planes to further enhance the separation effect. In other embodiments, it may be preferred that the baffle extends from the inner wall of the cover body 1 toward the cover plate 2 and extends all the way to the surface of the cover plate 2 or a surface close to the cover plate 2, or it may be preferred that the baffle extends from the cover plate 2 toward the cover body 1 and extends all the way to the surface of the cover body 1 or a surface close to the cover body 1.

[0029] The first baffle 61 and the second baffle 62 both include a first baffle 51 and a second baffle 52 that are symmetrically arranged, and the angle between the first baffle 51 and the second baffle 52 is 90-150°, preferably 120°, in a V-shaped arrangement. The V-shaped baffle divides the large airflow entering the cover plate 2 into small airflows, speeding up the airflow speed, so that larger oil droplets in the airflow are more easily blocked and adsorbed.

[0030] The opening formed between the first stopper 51 and the second stopper 52 faces the air inlet 4. That is, the distance between the first stopper 51 and the second stopper 52 gradually decreases from the side close to the air inlet 4 to the side away from the air inlet 4. The thickness of the baffle gradually decreases from the bottom to the top. That is, the surface of the baffle facing the air inlet 4 is inclined from bottom to top toward the side away from the air inlet 4. The airflow is lifted to the middle position in the length direction of the baffle, so that it can better contact the baffle.

[0031] Preferably, a protrusion 53 is provided on the side of the connection position between the first stop portion 51 and the second stop portion 52 close to the air inlet 4, and the surface of the protrusion 53 facing the air inlet 4 is inclined from bottom to top toward the side away from the air inlet 4, thereby increasing the contact area and lifting the airflow to the middle position in the length direction of the baffle for better contact with the baffle.

[0032] The working process of the engine cover structure in this embodiment is briefly described below:

[0033] The gas enters the oil-gas separation chamber from the air inlet 4, and is divided into smaller air flows through the V-shaped baffle. Due to the increased contact surface, more oil is adsorbed on the baffle and gathered together, and leaks out through the first reflux channel. The remaining gas enters the oil-gas separation box, and the oil separated by the oil-gas separation box flows back to the engine through the second reflux channel, and finally the exhaust gas is discharged through the PRV valve assembly.

[0034] According to knowledge of fluid mechanics, when gas flows from a larger cavity to a smaller cavity, its flow rate will increase due to the decrease in the cross-sectional area passing through the cavity opening, and the faster the mixed gas flows when it collides with the baffle, the easier it is for the oil droplets to be separated. In response to the low separation efficiency problem in the oil-gas separation chamber of the current engine cylinder head cover, this application improves the oil-gas separation blocking structure in the engine cover, and designs a V-shaped baffle and multiple groups of baffles to better divide the larger airflow into smaller airflows, increase the flow rate, and make it easier to adsorb the oil in the gas. The flow path of the oil-gas airflow is extended, allowing the gas to have more contact area with the V-shaped baffle, which is more conducive to adsorbing the oil in the gas, improving the efficiency of oil-gas separation, and improving the fuel efficiency of the engine. At the same time, the improvement can be carried out on the original channel space, will not affect the spatial layout of the engine cover, and the structure is more compact.

[0035] 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, characterized in that: The end of the cavity has an air inlet, and the cavity has a baffle, the extension direction of the baffle is perpendicular to the length direction of the cavity, the baffle includes a first baffle and a second baffle, the first baffle and the second baffle are set at an angle, and the opening formed between the first baffle and the second baffle faces the air inlet.

2. The engine cover according to claim 1, characterized in that: A plurality of rows of baffles are arranged in the cavity along the flow direction of the oil and gas, each row has a plurality of baffles, and the baffles in two adjacent rows are arranged alternately.

3. The engine cover according to claim 2, characterized in that: The width of the baffle is smaller than the distance between two baffles in each row.

4. The engine cover according to claim 1, characterized in that: The thickness of the baffle gradually decreases from the bottom to the top.

5. The engine cover according to claim 1, characterized in that: A side of the position where the first stopper and the second stopper are connected close to the air inlet is provided with a protrusion, and a surface of the protrusion facing the air inlet is inclined from bottom to top toward a side away from the air inlet.

6. The engine cover according to claim 1, characterized in that: The inner wall of the cover body is provided with a first baffle extending toward the cover plate, and the cover plate is provided with a second baffle extending toward the cover body, and the positions of the first baffle and the second baffle correspond to each other.

7. The engine cover according to claim 1, characterized in that: The included angle between the first stopper and the second stopper is 90-150°.

8. The engine cover according to claim 1, characterized in that: The first stopper and the second stopper are symmetrically arranged.

9. The engine cover according to any one of claims 1 to 8, characterized in that: The edges of the baffles are all arranged in an arc shape.

10. An engine, characterized in that: Comprising the engine cover as described in any one of claims 1-9.

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