CN115217578A - Triangle adjuster, crankcase forced ventilation adjustment system and crankcase adjustment method - Google Patents

Abstract

The invention discloses a crank regulator, a positive crankcase ventilation regulating system and a crank regulating method, wherein the crank regulator comprises a base, an eccentric rotating assembly, a controller, a pressure sensor and a pulse modulation valve; the base is provided with an air inlet and an air outlet; the air outlet is communicated with the crankcase; the eccentric rotating assembly is arranged between the air inlet and the air outlet and is used for regulating the gas flow entering the crankcase; the controller is electrically connected with the pressure sensor and the pulse modulation valve; the pressure sensor is arranged in the crankcase and used for detecting the current pressure in the crankcase and sending the current pressure to the controller; the pulse modulation valve is connected with the eccentric rotating assembly; the controller determines the current duty ratio according to the current pressure, controls the pulse modulation valve to work according to the current duty ratio, and adjusts the eccentricity of the eccentric rotating assembly. The inventive regulator can make the gas flow continuously, and accelerate the gas flow to the oil-gas separator, to improve the oil-gas separation efficiency.

Description

Triangle adjuster, crankcase forced ventilation adjustment system and crankcase adjustment method

technical field

The invention relates to the technical field of crankcase ventilation, in particular to a crankcase adjuster, a crankcase forced ventilation adjustment system and a crankcase adjustment method.

Background technique

During the working process of the vehicle engine, part of the mixture of air, fuel and oil and the combustion exhaust gas escape into the crankcase through the piston rings, and the condensation of too much mixture in the crankcase will make the lubricating oil thinner and easy to make Deterioration of oil, corrosion of parts, resulting in damage to the crankcase. Therefore, it is necessary to set up a crankcase ventilation system on the engine to extract the mixed gas and combustion exhaust gas (collectively referred to as the crankcase gas) from the crankcase, and separate oil and gas from the crankcase gas, so as to prolong the service life of the oil and reduce the number of parts. corrosion and other purposes.

The traditional crankcase ventilation system mostly uses the PCV valve to control the crankcase pressure within a normal range; when the crankcase pressure is higher than the maximum pressure controlled by the PCV valve, the PCV valve opens, the crankcase gas flow is accelerated, and passes through the oil and gas separator After separation, it enters the intake pipe; when the pressure of the crankcase is lower than the minimum pressure of the PCV valve, the PCV valve is closed, and the gas flow in the crankcase becomes slower at this time, and even the gas in the crankcase may stay in the crankcase; due to The PCV valve is closed, resulting in poor fluidity of the crankcase gas. Even if the flow adjustment component is used to adjust the gas flow, there is still a long retention time of the crankcase gas in the crankcase, resulting in low oil-gas separation efficiency.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a crankcase regulator, a crankcase forced ventilation adjustment system, and a crankcase adjustment method, so as to solve the problem of low oil-gas separation efficiency caused by using a PCV valve to control crankcase ventilation.

An embodiment of the present invention provides a crank adjuster for adjusting the flow of gas entering a crankcase, the crank adjuster includes a base, an eccentric rotating assembly, a controller, a pressure sensor and a pulse modulation valve;

the base has an air inlet and an air outlet; the air outlet communicates with the crankcase;

the eccentric rotating assembly is installed between the air inlet and the air outlet for regulating the flow of gas into the crankcase;

the controller is electrically connected to the pressure sensor and the pulse modulation valve;

The pressure sensor is installed in the crankcase for detecting the current pressure in the crankcase and sending the current pressure to the controller;

the pulse modulation valve is connected with the eccentric rotating assembly;

The controller determines the current duty cycle according to the current pressure, controls the pulse modulation valve to work according to the current duty cycle, and adjusts the eccentric distance of the eccentric rotating component.

Preferably, the base has a cavity; the eccentric rotating assembly includes a blade assembly, a stator and a rotor;

The vane assembly includes a plurality of vanes for driving gas flow; the rotor is rotatably mounted in the cavity, a plurality of the vanes are mounted on the outer side of the rotor, and the rotating area of the vanes covers the air inlet and said air outlet;

The stator is movably installed in the cavity, the stator has a cylindrical through cavity and is sleeved outside the rotor, the outer end of each blade abuts against the inner wall of the through cavity, and the adjacent two An air cavity is formed between the blade and the through cavity;

The controller determines the current duty cycle according to the current pressure, controls the pulse modulation valve to work according to the current duty cycle, and adjusts the eccentric distance between the stator and the rotor to adjust the air outlet. corresponding to the volume of the air cavity.

Preferably, one end of the stator is hinged to the base, the stator swings relative to the base and changes the eccentric distance from the rotor, and a space between the stator and the side wall of the cavity is formed for an adjustment cavity that pushes the stator to swing;

The controller determines the current duty cycle according to the current pressure, and controls the pulse modulation valve to work according to the current duty cycle, so as to adjust the cavity pressure of the adjustment chamber, so as to adjust the relationship between the stator and the The eccentricity of the rotor.

Preferably, the controller is configured to reduce the current duty cycle of the pulse modulation valve when the current pressure is greater than atmospheric pressure, so as to reduce the cavity pressure of the adjustment cavity, so that the stator and the The eccentricity of the rotor is reduced;

When the current pressure is not greater than the atmospheric pressure, the current duty ratio of the pulse modulation valve is increased to increase the cavity pressure of the adjustment chamber, thereby increasing the eccentric distance between the stator and the rotor.

Preferably, the eccentric rotating assembly further includes an elastic member; the stator is provided with a return seat; one end of the elastic member is in contact with the base, and the other end is in contact with the return seat;

the stator is hinged to the base;

When the cavity pressure of the adjustment cavity increases, when the return seat slides in the first direction, the return seat is pushed to squeeze the elastic member, and the stator is hinged around the stator and the base The eccentric distance between the stator and the rotor becomes larger;

When the cavity pressure of the adjustment cavity is reduced, when the return seat slides in the second direction, the elastic member resets and pushes the return seat, so that the stator is hinged around the stator and the base The eccentric distance between the stator and the rotor becomes smaller.

Preferably, the outer edge of the rotor is provided with a plurality of limiting grooves, each of the blades is telescopically inserted in the limiting groove, and the outer end of each of the blades is in contact with the inner wall of the through cavity.

Preferably, the blade assembly further includes two inner limit rings for connecting the same ends of the plurality of blades; the two end surfaces of the rotor are respectively provided with circular limit concave cavities, and each of the limit concave The cavity is used to accommodate the inner limit ring, and both sides of the inner end of each of the blades are respectively abutted to the outside of the corresponding inner limit ring; the centers of the two inner limit rings are located in the through cavity on the axis.

Preferably, the air inlet or the air outlet is provided with a one-way valve.

Preferably, the crank adjuster further includes a rotating shaft, one end of the rotating shaft is connected to the rotor, and the other end of the rotating shaft is connected to the engine.

An embodiment of the present invention provides a crankcase forced ventilation adjustment system, including a crankcase, a cylinder head, a cylinder head cover, an oil-gas separator, and the above-mentioned crank adjuster, wherein the crank adjuster is installed on the cylinder head A cover, the air outlet of the crank adjuster communicates with a ventilation passage in the cylinder head cover.

An embodiment of the present invention provides a method for adjusting the crankcase, which is used in the above-mentioned crankcase adjuster to adjust the gas flow rate entering the crankcase, and is characterized in that, the method includes the following steps performed by the controller:

Get the current pressure of the crankcase;

According to the current pressure, the current duty ratio is determined, and the pulse modulation valve is controlled to work according to the current duty ratio, and the eccentric distance of the eccentric rotating assembly is adjusted.

Preferably, the eccentric rotating component includes a stator and a rotor; the current duty cycle is determined according to the current pressure, the pulse modulation valve is controlled to work according to the current duty cycle, and the eccentricity of the eccentric rotating component is adjusted distance, including:

According to the current pressure, the current duty ratio is determined, and the pulse modulation valve is controlled to work according to the current duty ratio, so as to adjust the cavity pressure of the adjustment cavity, so as to adjust the eccentric distance between the stator and the rotor. .

Preferably, the current duty cycle is determined according to the current pressure, and the pulse modulation valve is controlled to work according to the current duty cycle, so as to adjust the cavity pressure of the adjustment chamber, so as to adjust the stator and the Describe the eccentricity of the rotor, including:

When the current pressure is greater than the atmospheric pressure, reducing the current duty cycle of the pulse modulation valve to reduce the cavity pressure of the adjustment chamber, so as to adjust the eccentric distance between the stator and the rotor to decrease;

When the current pressure is not greater than atmospheric pressure, the current duty cycle of the pulse modulation valve is increased to increase the cavity pressure of the adjustment chamber, so as to adjust the eccentric distance between the stator and the rotor to increase .

The above-mentioned crankcase regulator, crankcase forced ventilation adjustment system and crankcase adjustment method, the crankcase in this embodiment can adapt to different working conditions of the engine, control the pulse modulation valve through the current duty ratio, and maintain the crankcase. The current pressure is kept within the normal range, and the meander gas can continue to flow, and the meander gas can be accelerated as needed to flow to the oil-gas separator, thereby effectively preventing the meander gas from staying in the crankcase and improving the oil-gas separation efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

FIG. 1 is an overall schematic diagram of a triton regulator in an embodiment of the present invention;

2 is an exploded schematic diagram of a triton regulator in an embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of a triton regulator in an embodiment of the present invention;

4 is a schematic structural diagram of a rotor in an embodiment of the present invention;

5 is a schematic structural diagram of a base in an embodiment of the present invention;

6 is a schematic diagram of an air outlet and an air outlet cavity of a base in an embodiment of the present invention;

7 is a schematic structural diagram of a crankcase forced ventilation adjustment system in an embodiment of the present invention;

FIG. 8 is a schematic diagram of the installation of the triton adjuster according to an embodiment of the present invention;

9 is a schematic diagram of the gas flow of a crankcase forced ventilation adjustment system in an embodiment of the present invention;

10 is a schematic flowchart of a method for adjusting a triton according to an embodiment of the present invention;

FIG. 11 is another schematic flowchart of the method for adjusting the triton according to an embodiment of the present invention.

Among them, each reference sign in the figure:

1. Curved adjuster;

11, base; 111, air inlet; 112, air outlet; 113, concave cavity; 114, air inlet cavity; 115, air outlet cavity; 116, adjustment cavity;

12, rotor; 121, blade; 122, inner limit ring; 123, limit slot; 124, limit cavity;

13, stator; 131, through cavity; 132, hinge shaft; 133, hinge slot; 134, return seat;

1411, pressure air outlet; 1412, low pressure air intake; 1413, high pressure air intake; 142, elastic part; 143, pulse modulation valve; 1431, electrical connector;

15. Rotary shaft; 16. Front cover; 18. Check valve;

2. Crankcase; 3. Cylinder head; 4. Cylinder head cover; 5. Oil-gas separator; 6. Camshaft; 61. Camshaft groove; 7. Throttle valve; 8. Air filter.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientations or positional relationships indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, It is only for the convenience of describing the present invention and simplifying the description, not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

As shown in Figures 1, 2, 3, 5 and 6, the present invention provides a crank adjuster 1 for adjusting the gas flow rate entering the crankcase 2. The crank adjuster 1 includes a base 11, an eccentric rotating assembly, A controller (not shown in the figure), a pressure sensor (not shown in the figure) and a pulse modulation valve 143; the base 11 has an air inlet 111 and an air outlet 112; the air outlet 112 communicates with the crankcase 2; the eccentric rotating assembly is installed in the air Between the inlet 111 and the air outlet 112, it is used to adjust the gas flow into the crankcase 2; the controller is electrically connected to the pressure sensor and the pulse modulation valve 143; The current pressure is sent to the controller; the pulse modulation valve 143 is connected to the eccentric rotating assembly; the controller determines the current duty cycle according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty cycle, and adjusts the eccentric rotating assembly eccentricity.

In this embodiment, the pressure sensor detects the current pressure in the crankcase 2 in real time, and sends the current pressure to the controller. The controller forms the current duty cycle according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty cycle, and adjusts the The eccentric distance of the eccentric rotating assembly is used to adjust the gas flow into the crankcase 2, which can ensure that the current pressure of the crankcase 2 is within the normal range, and avoid the current pressure of the crankcase 2 being too high, causing the oil to leak from the inside to the outside. Or, it is avoided that the current pressure of the crankcase 2 is too low, and external air enters the interior of the crankcase 2 to contaminate the oil and corrode mechanical parts. At the same time, the current pressure collected by the pressure sensor is used to control the pulse modulation valve 143 to work, so that fresh air can continue to enter the crankcase 2, and the gas circulation is better, ensuring the continuous flow of the crankcase gas in the crankcase 2, and ensuring the crankcase 2. The current pressure is within the normal range, that is, it is ensured that the current pressure of the crankcase 2 is close to the atmospheric pressure. The controller controls the pulse modulation valve 143 to adjust the eccentricity of the eccentric rotating assembly according to the current duty cycle determined by the current pressure. When the eccentricity is larger, the gas flow into the crankcase 2 per unit time is larger; hour, the smaller the gas flow into the crankcase 2 per unit time, so as to use different eccentric distances to accelerate the flow of the crankcase gas in the crankcase 2, which can ensure that the crankcase gas flows to the oil and gas separator as needed. The current pressure inside is within the normal range, and at the same time, the residence time of the crankcase gas is shortened, the oil-gas separation efficiency is improved, and the problem of oil deterioration and thinning is greatly improved.

In this embodiment, the pressure sensor, the pulse modulation valve 143 and the eccentric rotating assembly can be used to ensure the continuous flow of the crankcase gas, and gas with different gas flow rates can be introduced into the crankcase 2, so as to ensure that the current pressure of the crankcase 2 is within At the same time, the flow of the crankcase gas in the crankcase 2 is accelerated, the residence time of the crankcase gas in the crankcase 2 is shortened, the oil and gas separation efficiency is improved, and the problem of oil deterioration and thinning is greatly improved.

The controller is electrically connected to the pulse modulation valve 143 through the electrical connector 1431 .

2, 3, 5 and 6, as an example, the base 11 has a cavity 113; the eccentric rotating assembly includes a vane assembly, a stator 13 and a rotor 12; the vane assembly includes a plurality of vanes 121 for driving gas flow ; The rotor 12 is rotatably installed in the cavity 113, a plurality of blades 121 are installed on the outside of the rotor 12, and the rotating area of the blades 121 covers the air inlet 111 and the air outlet 112; The stator 13 is movably installed in the cavity 113, and the stator 13 has a cylindrical shape The through cavity 131 is sleeved outside the rotor 12, the outer end of each blade 121 is in contact with the inner wall of the through cavity 131, and the two adjacent blades 121 and the through cavity 131 are enclosed to form an air cavity; the controller determines the current pressure according to the current pressure. For the duty ratio, the pulse modulation valve 143 is controlled to work according to the current duty ratio, and the eccentric distance between the stator 13 and the rotor 12 is adjusted to adjust the volume of the air cavity corresponding to the air outlet 112 .

In this embodiment, the crank adjuster 1 itself is used to actively input air to the crankcase 2 and adjust the air flow, so as to realize the forced ventilation of the crankcase 2 . During the rotation of the rotor 12, each adjacent vane 121 and the through-cavity 131 enclose an air cavity capable of accommodating part of the gas. Since the stator 13 and the rotor 12 are eccentrically arranged, that is, the volume of the air cavity at each position Not exactly the same. In this example, the air cavity located at the air outlet 112 has the smallest volume, that is, when an air cavity passes through the air inlet 111, air enters and fills the air cavity, and when the air cavity passes through the air outlet 112, the air cavity The air inside flows out from the air outlet 112 . Since the volume of the air cavity is reduced when the air cavity rotates to the air outlet 112 , the inside air is compressed. Therefore, the gas flowing out from the air outlet 112 has a higher air pressure than the air inlet 111 .

The pulse modulation valve 143 is controlled to work according to the current duty ratio, and the eccentric distance between the stator 13 and the rotor 12 is adjusted to adjust the volume of the air cavity corresponding to the air outlet 112. Specifically, if the current pressure is small, it is necessary to increase the crankcase 2 At this time, if the current duty ratio is increased, the larger the eccentric distance between the stator 13 and the rotor 12, the smaller the air cavity volume corresponding to the position of the air outlet 112; the larger the current pressure, the smaller the crankcase 2 At this time, reduce the current duty ratio, the smaller the eccentric distance between the stator 13 and the rotor 12, the larger the air cavity volume corresponding to the position of the air outlet 112. Since the volume of gas contained in the air cavity is constant, the smaller the air cavity volume, the greater the air pressure generated by compressing the internal air. Therefore, adjusting the eccentric distance between the stator 13 and the rotor 12 is equivalent to finally adjusting the air pressure of the gas flowing out of the air outlet 112 . In other words, the eccentric distance between the rotor 12 and the stator 13 is proportional to the air pressure at the air outlet 112: the greater the eccentric distance between the two, the greater the air pressure flowing out of the air outlet 112, and the greater the gas flow per unit time; The smaller the eccentricity, the smaller the air pressure flowing out from the air outlet 112, and the smaller the gas flow rate per unit time.

The crank adjuster 1 in this embodiment can coordinately adjust the ventilation effect of the crankcase 2 in two ways, thereby adjusting the oil-gas separation efficiency: ① The rotor 12 is adjusted. The faster the air flow rate through the regulator 1, the better the ventilation effect of the crankcase 2, the higher the oil and gas separation efficiency of the oil and gas separator 5 to the crank gas is improved, and vice versa, the lower the oil and gas separation efficiency is. ②The pulse modulation valve 143 is adjusted. The pulse modulation valve 143 can adjust the eccentric distance between the stator 13 and the rotor 12, thereby changing the air pressure flowing out of the air outlet 112. When the rotation speed is constant, the larger the eccentric distance is, the better the ventilation effect of the crankcase 2 is. The oil-gas separator 5 improves the oil-gas separation efficiency of the meander gas the higher. The above two adjustment methods are independent of each other and can be controlled separately. The fresh air flow into the crankcase 2 can be adjusted by setting the relevant control strategy, so as to better adapt to the ventilation requirements of the crankcase 2, thereby improving the oil-gas separation efficiency.

Therefore, the crank adjuster 1 in this embodiment can adapt to different working conditions of the engine, and controls the pulse modulation valve 143 through the current duty ratio to keep the current pressure in the crankcase 2 within a normal range, and can make fresh air Continuously flowing into the crankcase 2, the crankcase gas is accelerated to flow to the oil and gas separator 5, thereby effectively preventing the crankcase gas from staying in the crankcase 2, and improving the oil and gas separation efficiency.

As an example, as shown in FIGS. 2 , 3 , 5 and 6 , one end of the stator 13 is hinged to the base 11 , the stator 13 swings relative to the base 11 and changes the eccentric distance from the rotor 12 , the side of the stator 13 and the concave cavity 113 A regulating cavity 116 for pushing the stator 13 to swing is formed between the walls; the controller determines the current duty ratio according to the current pressure, and controls the pulse modulation valve 143 to work according to the current duty ratio to adjust the cavity pressure of the regulating cavity 116 to The eccentric distance between the stator 13 and the rotor 12 is adjusted.

Specifically, if the current pressure is small, the pressure in the crankcase 2 needs to be increased; at this time, if the current duty ratio is increased, the cavity pressure of the adjustment chamber 116 increases, and the stator 13 swings away from the adjustment chamber 116 . . If the current pressure is large, the pressure in the crankcase 2 needs to be reduced; at this time, if the current duty ratio is reduced, the cavity pressure of the adjustment chamber 116 is reduced, and the stator 13 swings toward the direction close to the adjustment chamber 116 . Specifically, the stator 13 is set to have two limit positions: at the lower limit position, the lower end face of the stator 13 completely fits the side wall of the cavity 113 , and the adjustment cavity 116 completely disappears at this time, and the through cavity 131 of the stator 13 is connected to the side wall of the cavity 113 . The eccentric distance of the rotor 12 is the smallest, and the rotor 12 is in the lowest air flow state under the premise that the rotational speed of the rotor 12 is constant; at the upper limit position, the upper end face of the stator 13 is completely attached to the side wall of the cavity 113, and the adjustment cavity 116 is in the maximum state, The eccentric distance between the through-cavity 131 of the stator 13 and the rotor 12 is the largest, and the rotor 12 is in the highest air flow state on the premise that the rotational speed of the rotor 12 is constant.

In this embodiment, by adjusting the eccentric distance between the stator 13 and the rotor 12, the air flow rate of the crankcase 1 can be controlled, so that the flow of the crankcase gas can be adjusted on demand, and the separation efficiency of the oil-gas separator 5 can be improved, thereby adjusting the air flow into the crankcase 2. The gas flow inside the engine greatly improves the problem of oil deterioration and thinning, and does not need to change the main structure of the engine.

As an example, as shown in FIGS. 3 , 5 and 6 , the bottom wall of the cavity 113 is provided with an air intake cavity 114 communicated with the air inlet 111 and an air outlet cavity 115 communicated with the air outlet 112 .

In this embodiment, when the blade 121 rotates, it sweeps over at least part of the end face of the intake cavity 114 and part of the end face of the air outlet cavity 115 . After the blade 121 rotates, it drives the air to flow out from the intake cavity 114 and into the air outlet cavity 115 , so that the crankcase 2 can be damaged. Active ventilation. By rationally setting the shapes and positions of the air inlet cavity 114 and the air outlet cavity 115 , it is ensured that the blades 121 can cover the positions of the air inlet cavity 114 and the air outlet cavity 115 , so as to ensure smooth air intake and air discharge.

As an example, as shown in FIGS. 3 , 5 and 6 , when the current pressure is greater than the atmospheric pressure, the controller reduces the current duty cycle of the pulse modulation valve 143 to reduce the chamber pressure of the regulating chamber 116 , so that the The eccentric distance between the stator 13 and the rotor 12 is reduced; if the current pressure is not greater than the atmospheric pressure, the current duty cycle of the pulse modulation valve 143 is increased to increase the cavity pressure of the adjustment chamber 116, so that the stator 13 and the rotor 12 are separated. Eccentricity increases.

Specifically, the base is provided with a pressure outlet hole 1411 that communicates with the adjustment chamber 116, a low-pressure air intake hole 1412 that communicates with the air inlet chamber 114, and a high-pressure air intake hole 1413 that communicates with the air outlet chamber 115; when the current pressure is greater than the atmospheric pressure, the controller will The pulse modulation valve 143 is controlled to adjust the first opening degree between the low pressure air intake hole 1412 and the pressure air outlet hole 1411 to increase, and the second opening degree between the high pressure air intake hole 1413 and the pressure air outlet hole 1411 decreases. At this time, the intake air is increased. The lower pressure gas in the cavity 114 enters the adjustment cavity 116, and the gas with the higher pressure in the air outlet cavity 115 is reduced to enter the adjustment cavity 116, the cavity pressure of the adjustment cavity 116 is reduced, and the eccentricity of the stator 13 and the rotor 12 is reduced. , therefore, reduce the gas flow into the crankcase 2, ensure that the current pressure of the crankcase 2 remains within the normal range, and can speed up the flow rate of the crankcase gas, shorten the residence time of the crankcase gas in the crankcase 2, and improve the oil and gas separation efficiency.

On the contrary, when the current pressure is less than atmospheric pressure, the controller controls the pulse modulation valve 143 to adjust the first opening between the low pressure air intake hole 1412 and the pressure air outlet hole 1411 to decrease, and the first opening between the high pressure air intake hole 1413 and the pressure air outlet hole 1411 to decrease. The second opening is increased; at this time, the lower pressure gas in the intake cavity 114 is reduced to enter the adjustment cavity 116, and the higher pressure gas in the outlet cavity 115 is increased into the adjustment cavity 116, then the cavity pressure of the adjustment cavity 116 increases Larger, the eccentric distance between the stator 13 and the rotor 12 increases, therefore, the gas flow into the crankcase 2 can be increased to ensure that the current pressure of the crankcase 2 remains within the normal range. The flow speed of the crankcase gas shortens the residence time of the crankcase gas in the crankcase 2 and improves the oil-gas separation efficiency.

As an example, the pulse modulation valve 143 further includes an elastic member 142; the stator 13 is provided with a return seat 134; one end of the elastic member 142 is in contact with the base 11, and the other end is in contact with the return seat 134; the stator 13 is in contact with the base 11 Hinged; when the cavity pressure of the adjustment cavity 116 increases, when the return seat 134 slides in the first direction, the return seat 134 is pushed to squeeze the elastic member 142, and the stator 13 rotates around the position where the stator 13 and the base 11 are hinged, and the stator 13 rotates. The eccentric distance between 13 and the rotor 12 increases; when the cavity pressure of the adjustment cavity 116 decreases, when the return seat 134 slides in the second direction, the elastic member 142 resets and pushes the return seat 134, so that the stator 13 is wound around the stator 13 and the base. The hinged position of the seat 11 is rotated, and the eccentric distance between the stator 13 and the rotor 12 is reduced.

Specifically, one end of the stator 13 is a hinged end, and the hinged slot 133 and the hinged shaft 132 installed on the cavity 113 constitute a rotating installation relationship, and the other end of the stator 13 is a movable end, and a return seat is provided on the movable end 134. The adjustment assembly further includes an elastic member 142, one end of the elastic member 142 abuts against the inner wall of the cavity 113, the other end of the elastic member 142 abuts on the return seat 134, and the elastic member 142 has the elasticity to push the stator 13 to swing toward the adjustment cavity potential energy. During the process that the adjustment chamber 116 pressurizes and pushes the stator 13 to swing, the elastic member 142 is compressed to accumulate elastic potential energy. When the air pressure of the adjustment chamber 116 drops below the elastic force of the elastic member 142, the stator 13 is pushed toward the adjustment chamber under the elastic force of the elastic member 142. 116 Swing to the lower limit position.

In this embodiment, when the cavity pressure of the adjustment cavity 116 is increased, the stator 13 is pushed, the lower end of the stator 13 moves away from the adjustment cavity 116 , the return seat 134 slides in the first direction, and the elastic member 142 is compressed The elastic potential energy is accumulated, and the eccentric distance between the stator 13 and the rotor 12 becomes larger; when the cavity pressure of the adjustment cavity 116 decreases, the stator 13 is pushed to swing toward the adjustment cavity 116 under the elastic force of the elastic member 142 to the lower limit position, and the stator 13 and the rotor 12 The eccentricity becomes smaller.

As an example, as shown in FIGS. 3 , 4 , 5 and 6 , the outer edge of the rotor 12 is provided with a plurality of limiting slots 123 , and each blade 121 is telescopically inserted into the limiting slot 123 , and the outer end of each blade 121 is connected to the The inner wall of the through cavity 131 abuts against.

In this embodiment, the blades 121 can slide in the limiting grooves 123 , which is equivalent to being able to expand and contract relative to the rotor 12 , and the outer ends of the blades 121 abut against the inner wall of the through cavity 131 . Since the stator 13 and the rotor 12 are eccentrically arranged, the distance between the two is different at different positions, that is, when the blade 121 rotates to different positions, the longest length that the blade 121 can extend due to the limitation of the through cavity 131 is different. The volume of the air cavity limited by the line is also different. By increasing or decreasing the eccentric distance between the stator 13 and the rotor 12, the displacement stroke of the vanes 121 in one operation cycle is increased, thereby increasing the volume change of the air cavity. Wherein, the blade 121 at the air outlet 112 has a shorter length when it can extend out of the limiting groove 123, that is, the volume of the air cavity at the air outlet 112 is smaller, and the air cavity is closer to the air during the rotation process. The more the volume of the outlet 112 is compressed, the air inside is compressed, and the air pressure is increased, thereby increasing the air pressure of the air outlet 112 and realizing the effect of increasing the air flow.

As an example, as shown in FIGS. 2 and 4 , the blade assembly further includes two inner limit rings 122 for connecting the same ends of the plurality of blades 121 ; the two end faces of the rotor 12 are each provided with a circular limit cavity 124 , each limiting cavity 124 is used to accommodate the inner limiting ring 122, and both sides of the inner end of each blade 121 are respectively abutted to the outside of the corresponding inner limiting ring 122; the center of the two inner limiting rings 122 is located in the through cavity 131 on the axis.

In this embodiment, since each blade 121 has the same length, the outer end of the blade 121 abuts against the inner wall of the cavity 113, and the inner end of the blade 121 abuts against the outer wall of the inner limit ring 122, so that all the blades 121 are in contact with the rotor. The 12 can move synchronously in the radial direction. When the stator 13 moves relative to the rotor 12, it drives all the blades 121 and the inner limit ring 122 to float together relative to the rotor 12, so as to realize the effect of adjusting the length of the blades 121, thereby adjusting the air The role of cavity volume. In other embodiments, the outer ends of the vanes 121 may also be fixed to the inner wall of the cavity 113 to achieve the effect of synchronous movement of all the vanes 121 .

As an example, as shown in FIG. 9 , the air inlet 111 or the air outlet 112 is provided with a one-way valve 18 .

In this embodiment, when the rotor 12 rotates, the air flows out of the crank adjuster 1 through the air outlet cavity 115, and the one-way valve 18 is opened by the pressure difference of the air circulation, and the air in the pipeline behind the air filter 8 is sucked into the concave cavity. In the cavity 113, the air flow of the crank adjuster 1 is adjusted. Similarly, the one-way valve 18 can also be arranged at the air outlet 112 to adjust the air flow of the crank adjuster 1 .

As an example, as shown in FIGS. 1 , 2 and 8 , the crank adjuster 1 further includes a rotating shaft 15 , one end of the rotating shaft 15 is connected to the rotor 12 , and the other end of the rotating shaft 15 is connected to the engine.

After the engine rotates, it drives the rotor 12 to rotate synchronously. On the one hand, the engine provides kinetic energy to the rotor 12, and drives the rotor 12 to rotate to drive the gas flow, so that no other power source is required; on the other hand, the rotational speed of the rotor 12 is proportional to the rotational speed of the engine. The higher the load and the greater the load, the more gas leaks into the crankcase 2 through the piston ring, and the crankcase 2 has higher requirements for ventilation. At this time, the speed of the rotor 12 is synchronized with the speed of the engine, and the rotation speed of the rotor 12 is also High, so as to speed up the air circulation speed and increase the air flow of the crank adjuster 1 to match the ventilation requirements of the crankcase 2. In the same way, when the engine speed is low and the load is small, the air leakage of the piston is small, the ventilation flow demand of the crankcase 2 is small, and the speed of the rotor 12 is also low, thereby reducing the air flow speed of the crank adjuster 1, reducing the Air flow into crankcase 2 to match crankcase 2 ventilation requirements.

Example 2

As shown in FIG. 7 to FIG. 9 , the present embodiment also provides a crankcase forced ventilation adjustment system, including a crankcase 2 , a cylinder head 3 , a cylinder head cover 4 , an oil-gas separator 5 and the crankcase adjustment in the above embodiments The crank adjuster 1 is installed on the cylinder head cover 4 , and the air outlet 112 of the crank adjuster 1 is connected to the ventilation passage in the cylinder head cover 4 .

Specifically, the cylinder head 3 is installed above the crankcase 2 by locating pins, and can be fastened by high-strength bolts; the cylinder head cover 4 is installed above the cylinder head 3 by locating pins, and can be fastened by bolts; oil and gas separation The device 5 is installed above the cylinder head cover 4 and can be fastened by bolts, and a check valve 18 is provided at the two outlet positions of the oil and gas separator 5 to control the air output of the oil and gas separator 5; The adjuster 1 is installed on the sides of the cylinder head 3 and the cylinder head cover 4 and fastened by bolts; the pulse modulation valve 143 is installed on the crank adjuster 1 and fastened by bolts. Among them, the pulse modulation valve 143 of the crank adjuster 1 is connected with the controller through the wiring harness, the rotating shaft 15 of the crank adjuster 1 is connected with the camshaft 6 of the engine, and the camshaft 6 is installed on the camshaft groove 61 on the cylinder head 2 , press the camshaft bearing cover and fasten it with bolts; the above-mentioned parts can be sealed by solid gaskets or liquid gaskets.

Among them, the working principle of the crankcase forced ventilation adjustment system is:

As shown in FIG. 9 , when the engine is running, after the external air is filtered by the air filter 8, a part enters the crankcase 2 through the throttle valve 7; the other part enters the crankcase 1 through the air inlet 111, and passes through the crankcase After being adjusted by the regulator 1, it flows into the ventilation channel enclosed by the cylinder head 3 and the cylinder head cover 4. The crankcase 2 enters the ventilation channel inside the cylinder head 3 from the ventilation channel inside the crankcase 2, then enters the ventilation channel enclosed by the cylinder head 3 and the cylinder head cover 4, merges with the air flow adjusted by the crankcase regulator 1, and finally flows from the crankcase 1. The opening on the cylinder head cover 4 flows to the oil and gas separator 5. The oil and gas separator 5 separates the oil from the crank gas, the separated oil flows back into the oil pan, and the separated gas enters the cylinder for combustion in two channels. . Among them, one channel is a small load channel, and the separated gas enters the cylinder from the internal closed meander channel composed of the oil and gas separator 5, the cylinder head cover 4 and the cylinder head 3 for combustion; the other channel is a large load channel, passing through the outer The connecting line diverts the gas from the outlet of the oil and gas separator 5 into the intake pipe behind the air filter 8, and enters the cylinder with the air for combustion.

The higher the load of the engine and the faster the rotational speed, the more crankcase gas leaks into the crankcase 2 through the piston ring, and the faster the crankcase gas needs to flow. The flow rate of the crank adjuster 1 is determined by the rotational speed of the rotor 12 and the eccentric distance between the rotor 12 and the stator 13, while the rotational speed of the rotor 12 is determined by the rotational speed of the engine and changes in the same direction as the rotational speed of the engine. , the flow rate of the crank adjuster 1 increases with the increase of the engine speed, and automatically follows the increase of the engine speed to strengthen the flow of the crank gas, and automatically follows the decrease of the engine speed to weaken the effect of strengthening the flow of the crank gas. When the current pressure is small, the pressure in the crankcase 2 needs to be increased; at this time, the controller increases the current duty cycle, the cavity pressure of the adjustment cavity 116 increases, and the stator 13 swings away from the adjustment cavity 116 . If the current pressure is large, the pressure in the crankcase 2 needs to be reduced; at this time, if the current duty ratio is reduced, the cavity pressure of the adjustment chamber 116 is reduced, and the stator 13 swings toward the direction close to the adjustment chamber 116 .

Under the action of the crank adjuster 1, the flow speed of the crank gas from the cylinder head cover 4 to the oil and gas separator 5 is accelerated, the separation speed of the oil and gas separator 5 is accelerated, the oil and gas separation efficiency is improved, and the flow rate of the crank gas in the crankshaft is shortened. The retention time in the tank 2 can greatly improve the problem of oil deterioration and thinning, and can be realized without changing the main structure of the engine.

Further, the crank adjuster 1 further includes a front cover plate 16 installed on both ends of the base 11 , the front cover plate 16 is sealed at the open end of the cavity 113 to seal the entire cavity 113 , and the front cover plate 16 is provided with There are holes through which the rotating shaft 15 passes and holes through which the air outlet 112 is connected to the outside.

Optionally, a sealing ring is provided in the hole on the front cover 16 for the rotating shaft 15 to pass through and the hole in which the air outlet 112 is connected to the outside, so as to seal, so as to prevent the air in the crank adjuster 1 from leaking and causing air leakage. The air pressure of the crank adjuster 1 changes, thereby affecting the adjustment performance of the crank adjuster 1 .

Example 3

As shown in FIG. 10 , the present embodiment provides a method for adjusting the crankcase, which is used to control the above-mentioned crankcase regulator 1 to adjust the gas flow rate entering the crankcase 2, which is characterized in that the following steps are performed by the controller:

S101: Obtain the current pressure of the crankcase.

In this embodiment, a pressure sensor is installed in the crankcase 2 to accurately detect the current pressure in the crankcase 2; the current pressure is sent to the controller.

S102: Determine the current duty cycle according to the current pressure, control the pulse modulation valve to work according to the current duty cycle, and adjust the eccentric distance of the eccentric rotating component.

The controller generates the current duty cycle according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty cycle, and adjusts the eccentric distance of the eccentric rotating assembly to adjust the gas flow into the crankcase 2, which can ensure the current pressure of the crankcase 2 In the normal range, avoid the current pressure of the crankcase 2 being too high, causing oil leakage from the inside to the outside, or the current pressure of the crankcase 2 being too low, and outside air entering the crankcase 2, polluting the oil and corroding parts. At the same time, using the current duty cycle to control the pulse modulation valve 143 to work, fresh air can continue to enter the crankcase 2, and the gas circulation is better, ensuring the continuous flow of the crankcase gas in the crankcase 2, and ensuring that the current pressure of the crankcase 2 is within Within the normal range, the PCV valve is closed when the current pressure of the crankcase 2 is too low, resulting in poor gas flow in the crankcase 2, slow gas flow in the crankcase, and condensation; and the current duty cycle is used to control the pulse modulation valve. 143 Adjust the eccentricity of the eccentric rotating assembly. When the eccentricity is large, the gas flow into the crankcase 2 per unit time is larger; when the eccentricity is small, the gas flow into the crankcase 2 per unit time is smaller. In order to speed up the flow of the crankcase gas in the crankcase 2, shorten the residence time of the crankcase gas in the crankcase 2, improve the oil-gas separation efficiency, and greatly improve the problem of oil deterioration and thinning.

The crankcase adjustment method provided in this embodiment acquires the current pressure of the crankcase 2 . According to the current pressure, determine the current duty ratio, control the pulse modulation valve 143 to work according to the current duty ratio, and adjust the eccentricity of the eccentric rotating assembly, so as to speed up the flow of the crankcase gas in the crankcase 2 and shorten the flow of the crankcase gas in the crankcase 2 Longer residence time, improve oil and gas separation efficiency, and greatly improve the problem of oil deterioration and thinning.

As an example, the eccentric rotating assembly includes a stator 13 and a rotor 12;

Step S102, that is, determining the current duty cycle according to the current pressure, controlling the pulse modulation valve to work according to the current duty cycle, and adjusting the eccentric distance of the eccentric rotating component, including: determining the current duty cycle according to the current pressure, and according to the current duty cycle Control the pulse modulation valve to work to adjust the cavity pressure of the adjustment cavity to adjust the eccentric distance between the stator and the rotor.

Specifically, if the current pressure is small, the pressure in the crankcase 2 needs to be increased; at this time, if the current duty ratio is increased, the larger the eccentric distance between the stator 13 and the rotor 12 is, the volume of the air cavity corresponding to the position of the air outlet 112 is increased. The smaller the current pressure is, the pressure in the crankcase 2 needs to be reduced; at this time, the current duty cycle is reduced, the smaller the eccentric distance between the stator 13 and the rotor 12 is, the larger the volume of the air cavity corresponding to the position of the air outlet 112 is. To adjust the gas flow into the crankcase 2, it can ensure that the current pressure of the crankcase 2 is within the normal range, so as to avoid the current pressure of the crankcase 2 being too high, causing the oil to leak from the inside to the outside, or the crankcase 2 The current pressure is too low, and outside air enters the crankcase 2, polluting the oil and corroding parts.

As an example, as shown in FIG. 11 , the current duty cycle is determined according to the current pressure, and the pulse modulation valve is controlled to work according to the current duty cycle to adjust the cavity pressure of the adjustment cavity to adjust the eccentric distance between the stator and the rotor, including :

S111 : If the current pressure is greater than the atmospheric pressure, reduce the current duty ratio of the pulse modulation valve to reduce the cavity pressure of the adjustment chamber, so as to adjust the eccentric distance between the stator and the rotor to decrease.

When the current pressure is greater than atmospheric pressure, the controller increases the current duty cycle, and controls the pulse modulation valve 143 to adjust the first opening between the low pressure air intake hole 1412 and the pressure air outlet hole 1411 to increase, and between the high pressure air intake hole 1413 and the pressure air outlet hole 1411 The second opening decreases during the period of time. At this time, the gas with lower pressure in the intake cavity 114 is increased to enter the adjustment cavity 116, and the gas with higher pressure in the outlet cavity 115 is reduced to enter the adjustment cavity 116, then the cavity of the adjustment cavity 116 is reduced. As the body pressure decreases, the eccentric distance between the stator 13 and the rotor 12 decreases. Therefore, the gas flow rate entering the crankcase 2 is reduced to ensure that the current pressure of the crankcase 2 remains within the normal range, and the flow rate of the crankcase gas can be accelerated. The residence time of the crankcase gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

S112: If the current pressure is not greater than the atmospheric pressure, increase the current duty ratio of the pulse modulation valve to increase the cavity pressure of the adjustment chamber, so as to adjust the eccentric distance between the stator and the rotor to increase.

When the current pressure is lower than atmospheric pressure, the controller reduces the current duty cycle, controls the pulse modulation valve 143 to adjust the first opening between the low pressure air intake hole 1412 and the pressure air outlet hole 1411 to decrease, and the high pressure air intake hole 1413 and the pressure air outlet hole 1411 The second opening degree increases; at this time, the lower pressure gas in the intake cavity 114 is reduced to enter the adjustment cavity 116, and the higher pressure gas in the outlet cavity 115 is increased to enter the adjustment cavity 116, then the adjustment cavity 116 As the cavity pressure increases, the eccentricity between the stator 13 and the rotor 12 increases. Therefore, the gas flow into the crankcase 2 can be increased to ensure that the current pressure of the crankcase 2 remains within the normal range, and at the same time, fresh air enters the crankcase 2. , the flow speed of the crankcase gas is accelerated, the residence time of the crankcase gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

In the crank adjustment method provided in this embodiment, if the current pressure is greater than the atmospheric pressure, the current duty cycle of the pulse modulation valve 143 is reduced to reduce the cavity pressure of the adjustment chamber 116 to adjust the relationship between the stator 13 and the rotor 12 . Eccentricity is reduced. If the current pressure is not greater than the atmospheric pressure, increase the current duty cycle of the pulse modulation valve 143 to increase the cavity pressure of the adjustment chamber 116 to adjust the eccentric distance between the stator 13 and the rotor 12 to increase the entry into the crankcase 2, to ensure that the current pressure of crankcase 2 remains within the normal range, and at the same time, fresh air enters crankcase 2, which speeds up the flow rate of crankcase gas and shortens the residence time of crankcase gas in crankcase 2. Improve oil and gas separation efficiency.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to implement the foregoing implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the within the protection scope of the present invention.

Claims (13)

1. A crank regulator is characterized by comprising a base, an eccentric rotating assembly, a controller, a pressure sensor and a pulse modulation valve;

the base has an air inlet and an air outlet; the air outlet is communicated with the crankcase;

the eccentric rotating assembly is arranged between the air inlet and the air outlet and is used for regulating the gas flow entering the crankcase;

the controller is electrically connected with the pressure sensor and the pulse modulation valve;

the pressure sensor is arranged in the crankcase and used for detecting the current pressure in the crankcase and sending the current pressure to the controller;

the pulse modulation valve is connected with the eccentric rotating assembly;

and the controller determines the current duty ratio according to the current pressure, controls the pulse modulation valve to work according to the current duty ratio and adjusts the eccentricity of the eccentric rotating assembly.

2. A triton adjuster according to claim 1 wherein said base has a cavity; the eccentric rotating assembly comprises a blade assembly, a stator and a rotor;

the vane assembly includes a plurality of vanes for driving a flow of gas; the rotor is rotatably arranged in the concave cavity, a plurality of blades are arranged on the outer side of the rotor, and the rotating areas of the blades cover the air inlet and the air outlet;

the stator is movably arranged in the concave cavity, the stator is provided with a cylindrical through cavity and is sleeved outside the rotor, the outer end of each blade is abutted to the inner wall of the through cavity, and an air cavity is formed by enclosing two adjacent blades and the through cavity;

and the controller determines the current duty ratio according to the current pressure, controls the pulse modulation valve to work according to the current duty ratio, and adjusts the eccentricity between the stator and the rotor so as to adjust the volume of the air cavity corresponding to the air outlet.

3. A triton regulator according to claim 2, wherein one end of the stator is hinged to the base, the stator swings relative to the base and changes the eccentricity with the rotor, and an adjusting cavity for pushing the stator to swing is formed between the stator and the side wall of the cavity;

and the controller determines the current duty ratio according to the current pressure, and controls the pulse modulation valve to work according to the current duty ratio so as to adjust the cavity pressure of the adjusting cavity and adjust the eccentricity of the stator and the rotor.

4. The crank regulator of claim 3 wherein the controller is configured to decrease the current duty cycle of the pulse modulation valve to decrease the cavity pressure of the regulation cavity to decrease the eccentricity of the stator and the rotor when the current pressure is greater than atmospheric pressure;

and when the current pressure is not greater than the atmospheric pressure, increasing the current duty ratio of the pulse modulation valve to increase the cavity pressure of the adjusting cavity so as to increase the eccentricity of the stator and the rotor.

5. A triton adjuster according to claim 3 wherein said eccentric rotating assembly further comprises a resilient member; the stator is provided with a return seat; one end of the elastic piece is abutted against the base, and the other end of the elastic piece is abutted against the return seat;

the stator is hinged with the base;

when the pressure of the cavity of the adjusting cavity is increased and the return seat slides to the first direction, the return seat is pushed to extrude the elastic piece, the stator rotates around the position where the stator is hinged with the base, and the eccentricity between the stator and the rotor is increased;

when the cavity pressure of the adjusting cavity is reduced and the return seat slides towards the second direction, the elastic piece resets and pushes the return seat, so that the stator rotates around the position where the stator is hinged with the base, and the eccentricity of the stator and the rotor is reduced.

6. A crank adjuster according to claim 2 wherein the rotor has a plurality of slots on its outer edge, each of the blades is telescopically inserted in the slots, and the outer end of each of the blades abuts against the inner wall of the through cavity.

7. A regulator according to claim 2, wherein said blade assembly further comprises two internal retaining rings for connecting the same ends of a plurality of said blades; two end faces of the rotor are respectively provided with a circular limiting concave cavity, each limiting concave cavity is used for accommodating the inner limiting ring, and two sides of the inner end of each blade are respectively abutted to the outer side of the corresponding inner limiting ring; the circle centers of the two inner limiting rings are positioned on the axis of the through cavity.

8. A triton regulator according to claim 2 wherein said air inlet or said air outlet is provided with a one-way valve.

9. A crank adjuster as claimed in claim 2, further comprising a rotating shaft, one end of which is connected to the rotor and the other end of which is connected to an engine.

10. A positive crankcase ventilation regulating system comprising a crankcase, a cylinder head cover, an air-oil separator and a crank adjuster according to any one of claims 1 to 9, the crank adjuster being mounted to the cylinder head cover, an air outlet of the crank adjuster being connected to a ventilation passage in the cylinder head cover.

11. A method of crank regulation for controlling a crank regulator according to any of claims 1-9 for regulating the flow of gas into a crankcase, comprising the steps performed by the controller of:

acquiring the current pressure of a crankcase;

and determining the current duty ratio according to the current pressure, controlling the pulse modulation valve to work according to the current duty ratio, and adjusting the eccentricity of the eccentric rotating assembly.

12. A method of tuning a switch as in claim 11, wherein said eccentric rotating assembly comprises a stator and a rotor; the determining a current duty ratio according to the current pressure, controlling the pulse modulation valve to work according to the current duty ratio, and adjusting the eccentricity of the eccentric rotating assembly comprises:

and determining a current duty ratio according to the current pressure, and controlling the pulse modulation valve to work according to the current duty ratio so as to adjust the cavity pressure of the adjusting cavity and adjust the eccentricity of the stator and the rotor.

13. The method for regulating triton according to claim 12, wherein said determining a current duty cycle based on said current pressure, and controlling said pulse modulation valve to operate based on said current duty cycle to regulate a cavity pressure of said regulation cavity to regulate an eccentricity of said stator from said rotor comprises:

when the current pressure is larger than the atmospheric pressure, reducing the current duty ratio of the pulse modulation valve to reduce the cavity pressure of the adjusting cavity so as to adjust the eccentricity reduction of the stator and the rotor;

and when the current pressure is not greater than the atmospheric pressure, increasing the current duty ratio of the pulse modulation valve to increase the cavity pressure of the adjusting cavity so as to adjust the eccentricity increase of the stator and the rotor.

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