WO2020052658A1

WO2020052658A1 - Filter-plate self-adaptive pressure adjustment oil-gas separation device for engine

Info

Publication number: WO2020052658A1
Application number: PCT/CN2019/105739
Authority: WO
Inventors: 韦福观; 朱雄; 覃星念; 赵宁宁; 叶双超; 余晓强
Original assignee: 广西玉柴机器股份有限公司
Priority date: 2018-09-14
Filing date: 2019-09-12
Publication date: 2020-03-19
Also published as: CN109236412A

Abstract

Disclosed is a filter-plate self-adaptive pressure adjustment oil-gas separation device for an engine. The device comprises a filter-pore separation device and a primary separation device, which are arranged in a mounting slot (101) in a cylinder head cover (100), wherein the mounting slot (101) is provided with a gas inlet hole (102) for receiving an oil-gas mixture in a crankcase; the mounting slot (101) is further provided with an exhaust hole (103) for discharging the separated exhaust gas; and the cylinder head cover (100), the filter-pore separation device and the primary separation device are combined to form a bent oil-gas channel. The filter-plate self-adaptive pressure adjustment oil-gas separation device for an engine can accelerate the oil-gas mixture, and the separated oil droplets flow out through an oil return chamber, thereby having a high separation efficiency and meeting the China VI Engine Emission Standards.

Description

Filter plate type adaptive pressure regulating engine oil-gas separation device

Technical field

The invention belongs to the technical field of oil and gas separation, and particularly relates to a filter plate type adaptive pressure regulating engine oil and gas separation device.

Background technique

The oil and gas generated by the engine at work enters the combustion chamber to participate in the combustion. The oil contained in this part of the oil and gas usually cannot be completely burned. Instead, the oil is channeled into the crankcase through the piston ring along with the exhaust gas. After entering the crankcase, the oil vapor condenses Thinning, performance degradation, and the combustible gas mixture and exhaust gas entering the crankcase will also increase the pressure in the crankcase, oil leakage from the crankshaft oil seals, gaskets, etc., increasing the pollution of the atmosphere during the engine operation. Therefore, The oil and gas exhausted by the engine needs to be separated by integrating an oil and gas separator in the cylinder head cover. The traditional cylinder head cover can only perform a single separation, and the effect is not as expected.

For example, the Chinese utility model patent “A cylinder head cover” with the publication number of CN205559013U includes a cylinder head cover body, and an oil and gas pre-separation chamber is formed inside the cylinder head cover body. The oil and gas pre-separation chamber is provided with a pre-separation air inlet. And a pre-separation gas outlet, in the oil-gas pre-separation chamber from the pre-separation air inlet to the pre-separation gas outlet, a plurality of lateral partitions arranged in a vertical direction and a labyrinth space in a horizontal direction are sequentially arranged. A plurality of vertical partitions, a horizontal partition and a vertical partition form a labyrinth-type oil and gas passage that communicates with the pre-separated air inlet and the pre-separated air outlet, and an oil-gas separator is integrated on the outer side wall of the cylinder head cover.

From the above, it can be found that the core of the pre-separation of oil and gas in the cylinder head cover in the prior art is a labyrinth-type oil and gas channel formed between the horizontal partition and the vertical partition, but its single-layer structure has poor oil and gas separation capabilities and low separation efficiency.

Summary of the Invention

The purpose of the present invention is to overcome the shortcomings of the prior art described above, and provide a new filter plate type self-adapting pressure regulating engine oil-gas separation device, which can effectively separate oil droplets of oil-gas mixtures, and has high separation efficiency, and does not require regular maintenance and replacement of filter elements. , Can meet the requirements of the national six engines.

The object of the present invention is achieved by the following technical solutions:

The invention provides a filter plate type self-adapting pressure-regulating engine oil-gas separation device, which includes a filter-hole type separation device and an initial separation device provided in a mounting groove in a cylinder head cover, and the mounting groove is provided for receiving oil and gas in a crankcase. The inlet of the mixture is provided with an exhaust hole for discharging the separated exhaust gas. The cylinder head cover, the filter-type separation device and the preliminary separation device are combined to form a curved oil and gas channel. The air inlet flows in, and then flows through the preliminary separation device for preliminary oil and gas separation, and then flows through the filter separation device for accelerated oil and gas separation. The preliminary separation device includes: a first curved baffle provided on the bottom plate, and a second The curved baffle plate and the first partition plate, the second partition plate, the third partition plate, the fourth partition plate, the fifth partition plate, and the sixth partition plate arranged in parallel on the bottom plate; the filter-type separation device includes: The coarse filter plate, the coarse filter baffle plate and the check valve provided on the coarse filter plate are arranged in parallel on the bottom plate; due to the setting of the check valve, the check valve does not conduct when the internal air pressure is small, and the internal air pressure is too high. Big One-way valve is turned to ease separation of the internal pressure protection, so that the filter pore separation apparatus has a characteristic of an adaptive regulator.

In one embodiment, the bottom plate is further provided with a first oil return cavity, a second oil return cavity, a third oil return cavity, a fourth oil return cavity, and a fifth oil return cavity; the oil and gas mixture enters through the air inlet hole. After that, some oil droplets are separated under the action of the first separator, and the separated oil droplets are discharged through the first oil return cavity to solve the problem of oil drainage. After the oil and gas mixture flows through the second separator and the third separator, Under the action of the impact force, part of the separated oil droplets are discharged through the second oil return chamber; after the oil and gas mixture flows through the fourth and fifth partitions, under the action of the impact force, the partially separated oil droplets pass through the first Three oil chambers are discharged; after the oil and gas mixture flows through the sixth partition, under the action of the impact force, part of the separated oil droplets are discharged through the fourth oil chamber; subsequently, the oil and gas mixture flows through the filter-type separation device. Under the action of the impact force, the partially separated oil droplets are discharged through the fifth oil return chamber, and the effect of discharging the separated oil droplets is achieved.

The coarse filter plate in the filter hole type separation device is provided with a coarse filter hole for accelerating the oil and gas mixture. In an embodiment, the coarse filter baffle is provided with a filter for collision and separation of oil droplets and diversion to oil. A filter rib of the fifth oil return chamber. In yet another embodiment, the coarse filter baffle is provided with needle-like protrusions for increasing the contact area of oil and gas collision, and the needle-like protrusions can effectively prevent The oil droplets are crushed twice due to high-speed collision to improve the efficiency of oil and gas separation. The coarse filter baffle is a non-closed open structure (easy for the flow of oil and gas mixture). The fifth return oil chamber is set in the coarse filter orifice plate and coarse filter. The bottom of the baffle is used to drain the collected oil droplets.

In one embodiment, the filtering hole type separation device further includes a curved plate provided on the bottom plate for impact separation of oil droplets and a sixth oil return chamber for discharging collected oil droplets. The curved plate is further provided There are two filter ribs for guiding oil droplets to the sixth oil return chamber.

In an embodiment, the distance between the coarse filter plate and the coarse filter baffle is 2 to 5 mm. According to the amount of air intake of the air inlet hole, the diameter of the coarse filter hole is 3 to 6 mm. The number of holes is 10 to 45, so that the flow velocity through the coarse filter plate is controlled at 5 to 8 m / s, and the oil and gas mixture flowing through the coarse filter plate collides with the coarse filter baffle to separate large oil droplets within this flow rate range. The effect is good.

Compared with the prior art, the advantages of the present invention are:

The filter plate-type self-adapting pressure-regulating engine oil and gas separation device can accelerate the oil and gas mixture. Large oil droplets can be separated through the initial separation device, and the filter-type separation device can further improve the separation efficiency. In addition, the filter-plate self-adapting pressure-regulating engine oil and gas The separation device can also preset the size of the coarse filter holes (including the size of the pores and the number of filter holes) according to the amount of air intake, thereby ensuring the accelerated flow rate of the oil and gas mixture and improving the efficiency of impacting and separating oil droplets.

BRIEF DESCRIPTION OF THE DRAWINGS

The following further describes the embodiments of the present invention with reference to the drawings, in which:

1 is a schematic structural diagram of a filter plate type adaptive pressure regulating engine oil-gas separation device according to an embodiment of the present invention;

2 is a schematic diagram of a three-dimensional structure of a pre-filter plate type adaptive pressure regulating engine oil-gas separation device (bottom plate not shown) according to an embodiment of the present invention;

3 is a schematic structural diagram of a coarse filter orifice plate, a coarse filter baffle, and a check valve according to an embodiment of the present invention;

4 is a schematic structural diagram of a fine filter hole covering an outlet end of a check valve according to an embodiment of the present invention;

5 is a schematic diagram of a three-dimensional structure of a coarse filter baffle provided with needle-shaped protrusions according to an embodiment of the present invention;

6 is a working principle diagram of a check valve in a conducting state according to an embodiment of the present invention.

In the figure, 100 is the cylinder head cover, 101 is the mounting groove, 102 is the air inlet hole, 103 is the air outlet, 201 is the bottom plate, 202 is the first curved baffle, 203 is the second curved baffle, and 204 is the first One partition, 205 is the second partition, 206 is the third partition, 207 is the fourth partition, 208 is the fifth partition, 209 is the sixth partition, 210 is a coarse filter plate, and 211 is a coarse filter Baffle plate, 212 is the first oil return chamber, 213 is the second oil return chamber, 214 is the third oil return chamber, 215 is the fourth oil return chamber, 216 is the fifth oil return chamber, and 217 is the sixth oil return chamber. , 218 is a curved plate, 219 is a check valve, 220 is a coarse filter hole, 221 is a filter rib, and 222 is a needle-shaped protrusion.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

In the embodiment of the present invention, a filter plate type self-adapting pressure regulating engine oil-gas separation device is provided. The filter plate type self-adapting pressure regulating engine oil-gas separation device includes a filter hole type separation device provided in a mounting groove in a cylinder head cover and a preliminary Separation device. The preliminary separation device can separate part of the oil droplets during the inlet phase of the oil and gas mixture. After the oil and gas mixture flows through the preliminary separation device, it enters the filter-type separation device, and the accelerated collision separation is performed in the filter-type separation device, and the oil droplets pass through The oil return pipe is drained. As shown in FIGS. 1 and 2, the cylinder head cover 100 is provided with a mounting groove 101 for installing a preliminary separation device and a filter-type separation device. The mounting groove 101 is provided with an air inlet hole 102 for receiving an oil and gas mixture in a crankcase of an engine. And an exhaust hole 103 for discharging the separated exhaust gas, the cylinder head cover 100, a filter-type separation device and a preliminary separation device are combined to form a curved oil and gas passage, and the preliminary separation device includes a bottom plate 201 The first curved baffle 202, the second curved baffle 203, and the first partition 204, the second partition 205, the third partition 206, and the fourth partition which are arranged in parallel on the bottom plate 201 for collision and separation of oil droplets. A plate 207, a fifth partition 208, and a sixth partition 209, the first curved baffle 202, the second curved baffle 203, the first partition 204, the second partition 205, and the third partition 206 The fourth partition plate 207, the fifth partition plate 208, and the sixth partition plate 209 together form a curved oil and gas channel. The oil and gas mixture flows from the air inlet hole 102 and flows through the preliminary separation device. Part of the oil droplets have been affected by the partition plate. Is initially separated out; then, the oil and gas mixture flows into the filter-type separation device, The filter-type separation device includes a coarse filter plate 210 arranged on the base plate 201 in parallel for accelerating the oil and gas mixture, a coarse filter baffle plate 211 for impact separation of oil droplets, and a unit provided on the coarse filter plate 210. Check valve 219 (as shown in Figure 3), when the oil and gas mixture flows through the filter-type separation device, the oil and gas mixture is accelerated through the coarse filter plate 210, and then collided with the coarse filter baffle 211 to separate it. The check valve 219 is used for The internal air pressure is adjusted to achieve a better separation effect. After the separation is completed, the exhaust gas is discharged through the exhaust hole 103 after the separation.

In one embodiment, the bottom plate 201 is further provided with a first oil return cavity 212, a second oil return cavity 213, a third oil return cavity 214, a fourth oil return cavity 215, and a first oil return cavity 212 for discharging collected oil droplets. Five oil return chambers 216; after the oil and gas mixture enters through the air inlet hole 102, part of the oil droplets are first separated under the action of the first separator 204, and the separated oil droplets are discharged through the first oil return chamber 212; After passing through the second separator 205 and the third separator 206, under the action of the impact force, part of the separated oil droplets are discharged through the second oil return chamber 213; then the oil-gas mixture flows through the fourth separator 207 and the fifth separator After the plate 208, part of the separated oil droplets is discharged through the third oil return chamber 214 under the impact of the impact force. Finally, after the oil and gas mixture flows through the sixth partition plate 209, the part of the separated oil droplets is affected by the impact force. The oil droplets are discharged through the fourth oil return chamber 215; subsequently, the oil and gas mixture flows through the filter-type separation device, the oil and gas mixture is accelerated through the coarse filter orifice plate 210, and then collided with the coarse filter baffle 211 to separate and partially separate the oil. The drops are discharged through the fifth oil return chamber 216. The coarse filter plate 210 is provided with a coarse filter hole 220 for accelerating the oil and gas mixture once. In one embodiment, as shown in FIG. 3, the coarse filter baffle 211 is provided with a filter rib 221 for collisionally separating large oil droplets and diverting large oil droplets to the fifth oil return chamber 216; In one embodiment, as shown in FIG. 5, the coarse filter baffle 211 is provided with needle-shaped protrusions 222 for increasing the contact area of oil and gas collision, and the needle-shaped protrusions 222 can effectively absorb high-speed collision coarse filters. The large oil droplets of the baffle 211 guide the oil droplets to the fifth oil return chamber 216, preventing the large oil droplets from being broken due to high-speed collisions (large oil droplet collisions are prone to splashing), and improving the efficiency of oil and gas separation; The fifth oil return chamber 216 is disposed below the coarse filter orifice plate 210 and the coarse filter baffle 211 for discharging collected oil droplets. The coarse filter baffle 211 is a non-closed opening structure (easy to form an oil and gas channel). The outlet end of the check valve 219 is fixed on the coarse filter hole plate 210. Because the coarse filter hole 220 is provided on the coarse filter plate 210, the outlet end of the check valve 219 will cover part of the coarse filter hole 220 (as shown in the figure) 3. As shown in Figure 4), when the air pressure of the oil and gas mixture flowing through the filter-type separation device is small (the flow rate of the oil and gas mixture is small) 8m / s), the air pressure is not enough to shock to open the check valve 219, the oil and gas mixture can be accelerated through the coarse filter hole 220 that is not covered by the check valve 219, and when the air pressure reaches a certain level (when the flow rate of the oil and gas mixture is greater than 8m / s) The air pressure is sufficient to impact the opening of the check valve 219, and part of the oil and gas mixture will flow through the coarse filter hole 220 covered by the check valve 219, thereby achieving the effect of adaptively adjusting the internal pressure and ensuring the stability of internal collision separation; The principle of the valve 214 is that in the initial state, the top cover depends on the spring force against the inlet end. Only after the pressure at the inlet end is greater than a certain degree, the top cover compresses the spring to conduct the check valve (as shown in Figure 6). The medium can enter through the inlet end and exit from the coarse filter hole covered by the outlet end. The oil and gas mixture flows through the coarse filter orifice plate 210 and accelerates to collide with the coarse filter baffle 211. The oil droplets will flow through a filter rib 221 into the fifth oil return chamber 216, and the remaining oil and gas mixture flows through the opening of the coarse filter baffle 211. Part (oil and gas channel) flows out.

In an embodiment, if the air intake volume of the air inlet hole 102 is 60 L / min, the diameter of the coarse filter hole 220 is set to 3 mm, and the number of the coarse filter hole 220 is set to 22 (one-way valve The outlet end of 219 is covered by 4 and the outlet end of non-return valve 219 is covered by 18. The oil and gas mixture can pass through the 18 unfiltered coarse filter holes 220), the coarse filter plate 210 and the coarse filter baffle 211 The interval is set to 2mm, so that the flow rate of the oil and gas mixture through the coarse filter plate 210 is controlled at about 7.9m / s. At this time, the internal air pressure is not enough to conduct the check valve 219 to flow through the coarse filter plate 210 oil and gas mixture. Under the setting of the flow rate and the distance, the large oil droplets are collided with the coarse filter baffle 211 to obtain a better separation effect; when the intake air volume of the air inlet 102 is increased from 60L / min to 78L / min, the oil and gas mix The flow rate of the stream passing through the coarse filter plate 210 is increased to 10.2 m / s, and the check valve 219 is conducted under the impact of gas pressure (the oil and gas mixture can pass through 22 coarse filter holes 220), so that the oil and gas mixture flows through the coarse filter plate 210 The flow velocity is reduced to 8.4m / s, and the oil and gas mixture flowing through the coarse filter orifice plate 210 is matched with the coarse filter baffle 2 at the flow velocity and spacing settings. 11 impact, a better separation effect can be obtained; in another embodiment, for example, if the intake air volume of the air inlet 102 is 105L / min, the diameter of the coarse filter hole 220 is set to 6mm, and the coarse filter hole 220 The number is set to 10 (in which the outlet end of the check valve 219 is covered by 2 and the outlet end of the check valve 219 is not covered with 8, the oil and gas mixture can pass through the 8 coarse filter holes 220 that are not covered), so The distance between the coarse filter plate 210 and the coarse filter baffle 211 is set to 3 mm, so that the flow rate of the oil and gas mixture through the coarse filter plate 210 is controlled at about 7.7 m / s. At this time, the internal pressure is not enough to make the check valve 219 When conducting, the oil and gas mixture flowing through the coarse filter orifice plate 210 collides with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow velocity and the spacing, and a better separation effect can be obtained; When 105L / min is increased to 140L / min, the flow rate of the oil and gas mixture passing through the coarse filter orifice plate 210 is increased to 10.3m / s, and the check valve 219 is conducted under the impact of gas pressure (the oil and gas mixture can pass through 10 coarse filter holes 220 ) To reduce the flow rate of the oil and gas mixture through the coarse filter plate 210 to 8.3 m / s, and the oil and gas mixture flowing through the coarse filter plate 210 Collision with the coarse filter baffle 211 under the setting of the flow velocity and the distance can obtain a better separation effect; in another embodiment, if the air intake volume of the inlet hole 102 is 180 L / min, the coarse filter hole The pore diameter of 220 is set to 5mm, and the number of the coarse filter holes 220 is set to 24 (of which the outlet end of the one-way valve 219 is covered by four, and the outlet end of the one-way valve 219 is not covered with 20, and the oil and gas mixture can pass through 20 uncovered coarse filter holes 220), and the distance between the coarse filter plate 210 and the coarse filter baffle 211 is set to 5 mm, so that the flow rate of the oil and gas mixture through the coarse filter plate 210 is controlled at about 7.6 m / s. At this time, the internal air pressure is not enough to conduct the check valve 219, and the oil and gas mixture flowing through the coarse filter orifice plate 210 will collide with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and spacing. Separation effect; when the intake air volume of the air inlet 102 is increased from 180L / min to 240L / min, the flow rate of the oil-gas mixture passing through the coarse filter plate 210 is increased to 10.2m / s, and the check valve 219 is under the impact of gas pressure Conduction (oil and gas mixture can pass through 24 coarse filter holes 220), allowing the oil and gas mixture to flow through the coarse filter plate 210 The speed drops to 8.5m / s, and the oil and gas mixture flowing through the coarse filter orifice plate 210 collides with the coarse filter baffle 211 under the setting of the flow velocity and spacing, and a better separation effect can be obtained; in another embodiment, such as The air intake of the air hole 102 is 200 L / min, the diameter of the coarse filter hole 220 is set to 6 mm, and the number of the coarse filter holes 220 is set to 20 (of which the outlet end of the check valve 219 covers 4 The outlet end of the non-return valve 219 is covered with 16, and the oil and gas mixture can pass through the 16 uncoated coarse filter holes 220). The distance between the coarse filter plate 210 and the coarse filter baffle 211 is set to 4 mm, so that The flow rate of the oil and gas mixture passing through the coarse filter plate 210 is controlled at about 7.4 m / s. At this time, the internal pressure is not sufficient to conduct the check valve 219, and the oil and gas mixture flowing through the coarse filter plate 210 is set at this flow rate and distance. Colliding with the coarse filter baffle 211 to separate large oil droplets can achieve better separation effect; when the intake air volume of the air inlet hole 102 is increased from 200L / min to 270L / min, the oil and gas mixture flows through the coarse filter plate 210. The flow rate is increased to 9.9m / s, and the check valve 219 conducts under the impact of gas pressure (the oil and gas mixture can pass through 20 coarse filter holes 2 20), reduce the flow rate of the oil and gas mixture through the coarse filter plate 210 to 8 m / s, and the oil and gas mixture flowing through the coarse filter plate 210 collides with the coarse filter baffle 211 under the setting of the flow rate and the distance, and a better result can be obtained In another embodiment, if the air intake volume of the air inlet hole 102 is 230 L / min, the diameter of the coarse filter hole 220 is set to 4mm, and the number of the coarse filter hole 220 is set to 45 (The outlet end of the one-way valve 219 is covered with 5, and the outlet end of the one-way valve 219 is not covered with 40. The oil and gas mixture can pass through the 40 uncovered coarse filter holes 220). The coarse filter plate 210 and The pitch of the coarse filter baffle 211 is set to 4mm, so that the flow rate of the oil and gas mixture passing through the coarse filter orifice plate 210 is controlled at about 8m / s. At this time, the internal pressure is not sufficient to conduct the check valve 219 to flow through the coarse filter hole. The oil and gas mixture of plate 210 collides with the coarse filter baffle 211 to separate large oil droplets under the setting of the flow rate and spacing, and a better separation effect can be obtained; when the intake air volume of the air inlet 102 is increased from 230L / min to 300L / min At this time, the flow velocity of the oil-gas mixture passing through the coarse filter orifice plate 210 is increased to 9.9 m / s, and the one-way valve 219 is under the impact of gas pressure (The oil and gas mixture can pass through the 45 coarse filter holes 220), so that the flow rate of the oil and gas mixture flowing through the coarse filter plate 210 is reduced to 8.8 m / s, and the oil and gas mixture flowing through the coarse filter plate 210 is set at the flow rate and spacing Collision with the coarse filter baffle 211 can achieve better separation effect.

In one embodiment, please continue to refer to FIG. 1 and FIG. 2. The filter-type separation device further includes a curved plate 218 provided on the bottom plate 201 for impact separation of oil droplets, and a sixth plate for discharging collected oil droplets. An oil return chamber 217, the curved plate 218 is further provided with two filter ribs (not shown in the figure) for colliding and separating oil droplets and guiding the oil droplets to the sixth oil return chamber 217; During the collision, the oil droplets flow into the sixth oil return chamber 217 through the two filter ribs, and the remaining oil and gas mixture flows through the upper part of the curved plate 218 (oil and gas passage) into the exhaust hole 103 to complete the pre-separation of the oil and gas mixture in the crankcase.

As can be seen from the above embodiments, compared with the prior art, the filter plate type adaptive pressure regulating engine oil-gas separation device according to the embodiment of the present application can accelerate the oil-gas mixture, separate oil droplets and flow out through the oil return cavity, and separate High efficiency; the size of the coarse filter (including the size of the filter and the number of filters) can also be preset according to the amount of air intake to ensure the accelerated flow rate and improve the efficiency of impacting and separating oil droplets. Emission standards.

References to "individual embodiments", "some embodiments", "one embodiment", or "embodiments" in this specification refer to specific features, structures, or properties described in connection with the embodiments, including In at least one embodiment. Thus, the appearances of the phrases "in various embodiments", "in some embodiments", "in one embodiment", or "in embodiments" and the like in various places throughout the specification do not necessarily refer to the same implementation example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or property shown or described in connection with one embodiment can be combined, in whole or in part, with a feature, structure, or property of one or more other embodiments without limitation, as long as the combination is not a non- Logical or not working. In addition, each element in the drawings of the present application is for illustrative purposes only, and is not drawn to scale.

Several aspects of at least one embodiment of the present invention are thus described, and it will be understood that various changes, modifications, and improvements can be easily made by those skilled in the art. Such changes, modifications, and improvements are intended to be within the spirit and scope of the invention.

Claims

A filter plate type self-adapting pressure-regulating engine oil-gas separation device includes a filter hole type separation device and an initial separation device provided in a mounting groove in a cylinder head cover, and the mounting groove is provided with an air inlet hole and an exhaust hole. The combination of the cylinder head cover, the filtering hole type separation device and the preliminary separation device forms an oil and gas channel, which is characterized by:

The primary separation device includes a first curved baffle plate, a second curved baffle plate, and a first partition plate, a second partition plate, a third partition plate, and a fourth partition plate arranged in parallel on the bottom plate. A plate, a fifth diaphragm and a sixth diaphragm; the filtering hole type separation device comprises a coarse filtering plate arranged in parallel on the bottom plate, a coarse filtering baffle and a check valve arranged on the coarse filtering plate.
The filter plate type adaptive pressure regulating engine oil-gas separation device according to claim 1, wherein the bottom plate is further provided with a first oil return chamber, a second oil return chamber, a third oil return chamber, and a fourth circuit. Oil chamber and fifth oil chamber.
The filter plate type self-adapting pressure-regulating engine oil-gas separation device according to claim 2, characterized in that the coarse filter plate in the filter-type separation device is provided with coarse filter holes, and the coarse filter baffle is provided with There is a filter bar or needle-shaped protrusion, the coarse filter baffle is a non-closed opening structure, the outlet end of the one-way valve is fixed on the coarse filter orifice plate, and the fifth oil return cavity is provided in the coarse filter. Under the filter plate and coarse filter baffle.
The filter plate type adaptive pressure regulating engine oil-gas separation device according to claim 1, wherein the filter hole type separation device further comprises a curved plate provided on the bottom plate and a sixth oil return cavity, the curved shape The plate is also provided with two filter bars.
The filter plate type adaptive pressure regulating engine oil-gas separation device according to claim 3, wherein a distance between the coarse filter plate and a coarse filter baffle is 2 to 5 mm, and a diameter of the coarse filter hole is 3 to 6 mm, and the number of the coarse filtering holes is 10 to 45.