CN115217578A

CN115217578A - Quiton regulator, positive crankcase ventilation regulating system and triton regulating method

Info

Publication number: CN115217578A
Application number: CN202111054154.5A
Authority: CN
Inventors: 龙彪; 吴广权; 林思聪; 陈良; 彭文
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-10-21
Anticipated expiration: 2041-09-09
Also published as: CN115217578B

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

Quiton regulator, positive crankcase ventilation regulating system and triton regulating method

Technical Field

The invention relates to the technical field of crankcase ventilation, in particular to a crank regulator, a positive crankcase ventilation regulating system and a crank regulating method.

Background

During the operation of the vehicle engine, part of the air, fuel oil and engine oil mixture and combustion exhaust gas are blown into the crankcase through the piston rings, and excessive mixture gas is condensed in the crankcase to thin the lubricating oil and easily deteriorate the engine oil, corrode parts and cause damage to the crankcase. Therefore, it is necessary to provide a crankcase ventilation system in the engine to extract the mixed gas and the combustion exhaust gas (collectively referred to as "crank gas") from the crankcase and separate the crank gas from the oil, thereby prolonging the service life of the engine oil and reducing the corrosion of parts.

The conventional crankcase ventilation system mostly adopts PCV valve to control the pressure of the crankcase to be in a normal range; when the pressure of the crankcase is higher than the maximum pressure controlled by the PCV valve, the PCV valve is opened, the gas flow of the crankcase is accelerated, and the gas enters an air inlet pipeline after being separated by the oil-gas separator; 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 slow, and even the gas in the crankcase possibly stays in the crankcase; because PCV valve closes, lead to crankcase inner bent gas mobility bad, even adopt flow control assembly carry on gas flow control, still there is the long residence time of bent gas in the crankcase, lead to the problem that the oil-gas separation efficiency is lower.

Disclosure of Invention

The embodiment of the invention provides a crank regulator, a positive crankcase ventilation regulating system and a crank regulating method, and aims to solve the problem of low oil-gas separation efficiency caused by the fact that PCV (positive crankcase ventilation) valves are adopted to control crankcase ventilation.

The embodiment of the invention provides a crank regulator, which is used for regulating the flow of gas entering a crankcase and comprises a base, an eccentric rotating assembly, a controller, a pressure sensor and a pulse modulation valve, wherein the eccentric rotating assembly is arranged on the base;

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 flow of gas 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.

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

the vane assembly comprises 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 of the stator and the rotor so as to adjust the volume of the air cavity corresponding to the air outlet.

Preferably, 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.

Preferably, the controller is configured to decrease the current duty cycle of the pulse modulation valve when the current pressure is greater than atmospheric pressure, so as to decrease the cavity pressure of the regulation cavity, so that the eccentricity between the stator and the rotor is decreased;

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.

Preferably, the eccentric rotation assembly further comprises an elastic 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.

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

Preferably, the blade assembly further comprises two inner limiting rings for connecting the same ends of the plurality of 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.

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

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

The embodiment of the invention provides a crankcase forced ventilation regulating system which comprises a crankcase, a cylinder cover, an oil-gas separator and the above-mentioned crank regulator, wherein the crank regulator is arranged on the cylinder cover, and an air outlet of the crank regulator is communicated to a ventilation channel in the cylinder cover.

An embodiment of the present invention provides a method for regulating a crank, which is applied to a crank regulator as described above, to regulate a gas flow entering a crankcase, and is characterized by including the following steps performed by a controller:

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.

Preferably, the eccentric rotary assembly includes 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.

Preferably, the determining a current duty ratio according to the current pressure, and controlling the pulse modulation valve to operate according to the current duty ratio to adjust the cavity pressure of the adjustment cavity so as to adjust the eccentricity between the stator and the rotor includes:

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.

According to the crank regulator, the crank case forced ventilation regulating system and the crank regulating method, the crank regulator in the embodiment can adapt to different working conditions of an engine, the pulse modulation valve is controlled through the current duty ratio, the normal range of current pressure keeping in the crank case is kept, the crank gas can continuously flow, and the flow of the crank gas to the oil-gas separator is accelerated as required, so that the crank gas is effectively prevented from being retained in the crank case, and the oil-gas separation efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a general schematic diagram of a bellcrank regulator in accordance with an embodiment of the present invention;

FIG. 2 is an exploded view of the regulator according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of the crank adjuster according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a rotor according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base according to an embodiment of the present invention;

FIG. 6 is a schematic view of the air outlet and air outlet chamber of the susceptor in one embodiment of the present invention;

FIG. 7 is a schematic diagram of a positive crankcase ventilation adjustment system according to an embodiment of the invention;

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

FIG. 9 is a schematic gas flow diagram of a positive crankcase ventilation modulation system according to an embodiment of the invention;

FIG. 10 is a flow chart of a method for tuning a triton according to an embodiment of the present invention;

fig. 11 is another schematic flow chart of a method for tuning a triton according to an embodiment of the present invention.

Wherein, in the figures, the various reference numbers:

1. a triton regulator;

11. a base; 111. an air inlet; 112. an air outlet; 113. a concave cavity; 114. an air inlet cavity; 115. an air outlet cavity; 116. an adjustment chamber;

12. a rotor; 121. a blade; 122. an inner limiting ring; 123. a limiting groove; 124. a concave limiting cavity;

13. a stator; 131. a cavity is communicated; 132. hinging a shaft; 133. a hinge slot; 134. a return seat;

1411. a pressure vent hole; 1412. a low-pressure air outlet; 1413. taking air holes at high pressure; 142. an elastic member; 143. a pulse modulation valve; 1431. an electrical connector;

15. a rotating shaft; 16. a front cover plate; 18. a one-way valve;

2. a crankcase; 3. a cylinder head; 4. a cylinder head cover; 5. an oil-gas separator; 6. a camshaft; 61. a camshaft slot; 7. a throttle valve; 8. an air cleaner.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1, 2, 3, 5 and 6, the present invention provides a crank regulator 1 for regulating the flow of gas into a crankcase 2, the crank regulator 1 comprising a base 11, an eccentric rotary assembly, a controller (not shown), a pressure sensor (not shown) 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; an eccentric rotary assembly is installed between the air inlet 111 and the air outlet 112 for regulating the flow of gas into the crankcase 2; the controller is electrically connected to the pressure sensor and the pulse modulation valve 143; the pressure sensor is arranged in the crankcase 2 and used for detecting the current pressure in the crankcase 2 and sending the current pressure to the controller; the pulse modulation valve 143 is connected with the eccentric rotating assembly; the controller determines the current duty ratio according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty ratio, and adjusts the eccentricity of the eccentric rotating assembly.

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 ratio according to the current pressure, control the pulse modulation valve 143 to work according to the current duty ratio, adjust the eccentricity of the eccentric rotating assembly, so as to adjust the gas flow entering the crankcase 2, and can ensure that the current pressure of the crankcase 2 is in the normal range, thereby avoiding the current pressure of the crankcase 2 from being too high, which causes the leakage of the engine oil from the inside to the outside, or avoiding the current pressure of the crankcase 2 from being too low, and outside air enters the inside of the crankcase 2, which pollutes the engine oil and corrodes machine parts. Meanwhile, the pulse modulation valve 143 is controlled to operate by using the current pressure acquired by the pressure sensor, so that fresh air can continuously enter the crankcase 2, the gas circulation is better, the continuous flow of the crankcase 2 internal bent gas is ensured, the current pressure of the crankcase 2 is ensured to be in a normal range, that is, the current pressure of the crankcase 2 is ensured to be 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 ratio determined by the current pressure, and when the eccentricity is larger, the gas flow entering the crankcase 2 in unit time is larger; when the eccentricity is less, the smaller the gas flow of the crankcase 2 entering in unit time is, so that the flow of the crank gas in the crankcase 2 is accelerated by utilizing different eccentricities, the flow of the crank gas flowing to the oil-gas separator can be accelerated as required, the current pressure in the crankcase is in a normal range, the detention time of the crank gas in the crankcase 2 is shortened, the oil-gas separation efficiency is improved, and the problems of deterioration and dilution of engine oil are greatly solved.

In this embodiment, utilize pressure sensor, pulse modulation valve 143 and eccentric rotating assembly, can guarantee that the gaseous condition that continuously flows of cranking leads to, to the gaseous gas of different gas flow of crankcase 2 lets in to guarantee that the current pressure of crankcase 2 is in normal range, accelerate the crankcase 2 in the bent body of ventilating simultaneously and flow, shorten the detention time of cranking gas in crankcase 2, improve oil-gas separation efficiency, improve the problem that engine oil is rotten, becomes rare by a wide margin.

Wherein the controller is electrically connected to the pulse modulation valve 143 via an electrical connection 1431.

As shown in fig. 2, 3, 5 and 6, as an example, the base 11 has a cavity 113; the eccentric rotating assembly comprises a blade assembly, a stator 13 and a rotor 12; the blade assembly includes a plurality of blades 121 for driving the flow of gas; the rotor 12 is rotatably mounted to the cavity 113, a plurality of vanes 121 are mounted to an outer side of the rotor 12, and a rotation area of the vanes 121 covers the air inlet 111 and the air outlet 112; the stator 13 is movably arranged in the cavity 113, the stator 13 is provided with a cylindrical through cavity 131 and is sleeved outside the rotor 12, the outer end of each blade 121 is abutted to the inner wall of the through cavity 131, and an air cavity is formed by enclosing two adjacent blades 121 and the through cavity 131; the controller determines the current duty ratio according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty ratio, and adjusts the eccentricity of the stator 13 and the rotor 12 to adjust the volume of the corresponding air cavity at the air outlet 112.

In this embodiment, the crank regulator 1 is used to actively supply air to the crankcase 2 and adjust the flow rate of the air to achieve forced ventilation of the crankcase 2. In the process of rotating the rotor 12, each adjacent blade 121 and the through cavity 131 are enclosed to form an air cavity capable of containing part of air, because the stator 13 and the rotor 12 are eccentrically arranged, that is, the volume of the air cavity at each position is not completely the same, in this example, the volume of the air cavity at the air outlet 112 is the smallest, that is, when one 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 in the air cavity flows out from the air outlet 112, because the volume of the air cavity is reduced when the air cavity rotates to the air outlet 112, the internal air is compressed, and therefore, the air flowing out from the air outlet 112 has the air pressure higher than that of the air inlet 111.

Controlling the pulse modulation valve 143 to work according to the current duty ratio, and adjusting the eccentricity of the stator 13 and the rotor 12 to adjust the volume of the air cavity corresponding to the air outlet 112, specifically: when the current pressure is lower, the pressure in the crankcase 2 needs to be increased; at this time, if the current duty ratio is increased, the larger the eccentricity between the stator 13 and the rotor 12 is, the smaller the volume of the air cavity corresponding to the position of the air outlet 112 is; when the current pressure is higher, the pressure in the crankcase 2 needs to be reduced; at this time, the smaller the eccentricity of the stator 13 from the rotor 12, the larger the volume of the air chamber corresponding to the position of the air outlet 112, decreasing the current duty ratio. Since the volume of the gas contained in the gas chamber is constant, the smaller the volume of the gas chamber, the greater the gas pressure generated by the compressed internal air, and therefore, adjusting the eccentricity of the stator 13 and the rotor 12 corresponds to finally adjusting the gas pressure of the gas flowing out of the air outlet 112. In other words, the eccentricity between the rotor 12 and the stator 13 is proportional to the air pressure at the air outlet 112: the larger the eccentricity of the two is, the larger the air pressure flowing out from the air outlet 112 is, and the larger the gas flow rate in unit time is; the smaller the eccentricity of the two is, the smaller the air pressure flowing out from the air outlet 112 is, and the smaller the gas flow rate per unit time is.

The ventilation effect that crankcase 2 was adjusted in coordination through two kinds of modes to the crank regulator 1 in this embodiment, and then adjusts oil-gas separation efficiency: (1) the rotor 12 is adjusted, when the eccentricity is not changed, the faster the synchronous rotating speed of the rotor 12 is, the faster the air flow rate of the crank regulator 1 is, the better the ventilation effect of the crank case 2 is, the higher the oil-gas separation efficiency of the crank gas is improved by the oil-gas separator 5, and otherwise, the lower the oil-gas separation efficiency is improved. (2) The pulse modulation valve 143 adjusts, and the pulse modulation valve 143 can adjust the eccentricity of stator 13 and rotor 12 to change the atmospheric pressure that the air outlet 112 flows out, when the rotational speed is unchangeable, the eccentricity is bigger, and the ventilation effect of crankcase 2 is better, and the oil-gas separation efficiency of oil-gas separator 5 to the crank gas promotes more. The two adjusting modes are mutually independent and can be respectively controlled, and the fresh air flow entering the crankcase 2 can be adjusted by setting a relevant control strategy, so that the ventilation requirement of the crankcase 2 is more adapted, and the oil-gas separation efficiency is further improved.

Therefore, the crank regulator 1 in this embodiment can adapt to different working conditions of the engine, and control the pulse modulation valve 143 through the current duty ratio to keep the current pressure in the crankcase 2 within the normal range, and can make the fresh air continuously flow into the crankcase 2, accelerate the flow of crank gas to the oil-gas separator 5, thereby effectively avoiding the crank gas from being retained in the crankcase 2, and improving the oil-gas separation efficiency.

As an example, as shown in fig. 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 eccentricity with the rotor 12, and an adjusting cavity 116 for pushing the stator 13 to swing is formed between the stator 13 and the side wall of the cavity 113; the controller determines the current duty ratio according to the current pressure, and controls the pulse modulation valve 143 to operate according to the current duty ratio to adjust the cavity pressure of the adjusting cavity 116, so as to adjust the eccentricity of the stator 13 and the rotor 12.

Specifically, when 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 regulation cavity 116 increases, and the stator 13 swings away from the regulation cavity 116. When the current pressure is higher, the pressure in the crankcase 2 needs to be reduced; at this time, when the current duty ratio is decreased, the cavity pressure of the adjustment cavity 116 is decreased, and the stator 13 swings toward the adjustment cavity 116. Specifically, the stator 13 is set to have two extreme positions: at the lower limit position, the lower end face of the stator 13 completely fits the side wall of the cavity 113, at this time, the adjusting cavity 116 completely disappears, the eccentricity between the through cavity 131 of the stator 13 and the rotor 12 is minimum, and the stator is in the lowest air flow state on the premise that the rotating speed of the rotor 12 is unchanged; in the upper limit position, the upper end surface of the stator 13 completely abuts against the side wall of the cavity 113, the adjusting cavity 116 is in the maximum state, the eccentricity between the through cavity 131 of the stator 13 and the rotor 12 is maximum, and the maximum air flow state is achieved under the premise that the rotating speed of the rotor 12 is not changed.

In the embodiment, the air flow of the crank regulator 1 can be controlled by adjusting the eccentricity of the stator 13 and the rotor 12, the flow of the crank gas can be adjusted as required, the separation efficiency of the oil-gas separator 5 is improved, the gas flow entering the crankcase 2 is adjusted, the problems of deterioration and thinning of engine oil are greatly improved, and the main structure of the engine does not need to be changed.

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

In this embodiment, the vane 121 sweeps at least a part of the end surface of the inlet cavity 114 and a part of the end surface of the outlet cavity 115 when rotating, and the vane 121 rotates to drive air to flow out from the inlet cavity 114 and enter the outlet cavity 115, thereby actively ventilating the crankcase 2. The shapes and the positions of the air inlet cavity 114 and the air outlet cavity 115 are reasonably arranged, so that the blades 121 can cover the positions of the air inlet cavity 114 and the air outlet cavity 115, and smooth air inlet and air outlet are guaranteed.

As an example, as shown in fig. 3, 5 and 6, the controller is configured to decrease the current duty cycle of the pulse modulation valve 143 when the current pressure is greater than the atmospheric pressure, so as to decrease the cavity pressure of the adjustment cavity 116, so that the eccentricity between the stator 13 and the rotor 12 is decreased; if the current pressure is not greater than the atmospheric pressure, the current duty ratio of the pulse modulation valve 143 is increased to increase the cavity pressure of the regulation cavity 116, so that the eccentricity between the stator 13 and the rotor 12 is increased.

Specifically, the base is provided with a pressure air outlet 1411 communicated with the adjusting cavity 116, a low-pressure air taking hole 1412 communicated with the air inlet cavity 114, and a high-pressure air taking hole 1413 communicated with the air outlet cavity 115; when the current pressure of the controller is greater than the atmospheric pressure, the pulse modulation valve 143 is controlled to adjust the first opening degree between the low-pressure gas taking hole 1412 and the pressure gas outlet hole 1411 to be increased, and the second opening degree between the high-pressure gas taking hole 1413 and the pressure gas outlet hole 1411 to be decreased, at this time, the gas with lower pressure in the gas inlet cavity 114 is increased to enter the adjusting cavity 116, and the gas with higher pressure in the gas outlet cavity 115 is decreased to enter the adjusting cavity 116, so that the cavity pressure of the adjusting cavity 116 is decreased, the eccentricity of the stator 13 and the rotor 12 is decreased, therefore, the gas flow entering the crankcase 2 is decreased, the current pressure of the crankcase 2 is kept in a normal range, the flow speed of the crank gas can be increased, the residence time of the crank gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

Conversely, when the current pressure is lower than the atmospheric pressure, the controller controls the pulse modulation valve 143 to adjust a first opening degree between the low-pressure gas taking hole 1412 and the pressure gas outlet hole 1411 to decrease, and a second opening degree between the high-pressure gas taking hole 1413 and the pressure gas outlet hole 1411 to increase; at this moment, the gas with lower pressure in the gas inlet cavity 114 is reduced to enter the adjusting cavity 116, and the gas with higher pressure in the gas outlet cavity 115 is increased to enter the adjusting cavity 116, so that the cavity pressure of the adjusting cavity 116 is increased, the eccentricity of the stator 13 and the rotor 12 is increased, and therefore, the gas flow entering the crankcase 2 can be increased, the current pressure of the crankcase 2 is kept in a normal range, meanwhile, fresh air enters the crankcase 2, the flowing speed of the crank gas is increased, the detention time of the crank gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

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 abuts against the base 11, and the other end abuts against the return seat 134; the stator 13 is hinged with the base 11; when the cavity pressure of the adjusting cavity 116 is increased and the return seat 134 slides to the first direction, the return seat 134 is pushed to extrude the elastic element 142, the stator 13 rotates around the position where the stator 13 is hinged with the base 11, and the eccentricity between the stator 13 and the rotor 12 is increased; when the pressure of the cavity of the adjusting cavity 116 is reduced and the return seat 134 slides in the second direction, the elastic member 142 returns to push the return seat 134, so that the stator 13 rotates around the position where the stator 13 is hinged to the base 11, and the eccentricity between the stator 13 and the rotor 12 decreases.

Specifically, the one end of stator 13 is the hinged end, and the articulated shaft 132 through installing on the articulated groove 133 that sets up and the cavity 113 constitutes the rotation installation relation, and the other end of stator 13 is the expansion end, is equipped with the seat 134 that returns on the expansion end, and adjusting part still includes elastic component 142, and the one end butt of elastic component 142 is to cavity 113 inner wall, and the other end butt of elastic component 142 is to the seat 134 that returns, and elastic component 142 has the elastic potential energy that promotes stator 13 and adjust the chamber wobbling. During the process of pressurizing the adjustment chamber 116 to push the stator 13 to swing, the elastic member 142 is compressed to accumulate elastic potential energy, and when the air pressure in the adjustment chamber 116 drops below the elastic force of the elastic member 142, the stator 13 is pushed to swing towards the adjustment chamber 116 to the lower limit position under the elastic force of the elastic member 142.

In this embodiment, when the cavity pressure of the adjustment cavity 116 is increased, the stator 13 is pushed, the lower end surface of the stator 13 moves in a direction away from the adjustment cavity 116, the return seat 134 slides in the first direction, the elastic member 142 is compressed to accumulate elastic potential energy, and the eccentricity between the stator 13 and the rotor 12 is increased; when the cavity pressure of the adjusting cavity 116 decreases, the stator 13 is pushed to swing towards the adjusting cavity 116 by the elastic force of the elastic member 142 until reaching the lower limit position, and the eccentricity between the stator 13 and the rotor 12 decreases.

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

In this embodiment, the blades 121 can slide in the limiting groove 123, which is equivalent to be able to extend and contract relative to the rotor 12, and the outer end of each blade 121 abuts against the inner wall of the through cavity 131. Since the stator 13 and the rotor 12 are eccentrically disposed, the distance between the two is different at different positions, that is, when the vane 121 rotates to different positions, the longest length that can be extended out of the vane is different due to the limitation of the through cavity 131, and thus the volume of the air cavity limited by the vane is different. By increasing or decreasing the eccentricity of the stator 13 from the rotor 12, the displacement stroke of the vanes 121 during one operating cycle is increased, thereby increasing the volumetric change of the air cavity. Among them, the blade 121 at the air outlet 112, when the length of the blade which can extend out of the limiting groove 123 is shorter, that is, the volume of the air cavity at the air outlet 112 is smaller, the volume of the air cavity is compressed when the air cavity is closer to the air outlet 112 in the rotating process, so that the air inside is compressed, the air pressure is increased, the air pressure of the air outlet 112 is increased, and the effect of increasing the air flow is realized.

As an example, as shown in fig. 2 and 4, the blade assembly further comprises two inner stop rings 122 for connecting the same ends of the plurality of blades 121; two end faces of the rotor 12 are respectively provided with a circular limiting concave cavity 124, each limiting concave cavity 124 is used for accommodating an inner limiting ring 122, and two sides of the inner end of each blade 121 are respectively abutted to the outer side of the corresponding inner limiting ring 122; the centers of the two inner limiting rings 122 are located on the axis of the through cavity 131.

In this embodiment, because the lengths of the blades 121 are the same, the outer ends of the blades 121 abut against the inner wall of the cavity 113, and the inner ends of the blades 121 abut against the outer wall of the inner limiting ring 122, so that all the blades 121 can move synchronously in the radial direction of the rotor 12, and when the stator 13 moves relative to the rotor 12, all the blades 121 and the inner limiting ring 122 are driven to float relative to the rotor 12 together, so as to adjust the length extension of the blades 121, thereby playing a role in adjusting the volume of the air cavity. In other embodiments, the outer ends of the blades 121 may be fixed to the inner wall of the cavity 113, so that the synchronous movement of all the blades 121 is realized.

As an example, as shown in fig. 9, the air inlet 111 or the air outlet 112 is provided with a check valve 18.

In this embodiment, when the rotor 12 rotates, air flows out of the crank adjuster 1 through the air outlet chamber 115, and the pressure difference of the air flow opens the check valve 18 to draw air in the duct behind the air cleaner 8 into the cavity 113, thereby adjusting the air flow rate of the crank adjuster 1. Similarly, a check valve 18 may be provided at the air outlet 112 to regulate the air flow rate of the crank regulator 1.

As an example, as shown in fig. 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, the rotor 12 is synchronously driven to rotate, on one hand, the engine provides kinetic energy for the rotor 12 to drive the rotor 12 to rotate and drive gas to flow, so that other power sources are not required to be arranged; on the other hand, the rotating speed of the rotor 12 is in direct proportion to the rotating speed of the engine, the higher the rotating speed of the engine and the larger the load, the more gas leaked into the crankcase 2 through the piston ring, the higher the ventilation requirement of the crankcase 2 is, at the moment, the rotating speed of the rotor 12 is synchronous with the rotating speed of the engine, the rotating speed of the rotor 12 is also high, the air circulation speed is increased, and the air flow of the crank regulator 1 is increased to match the ventilation requirement of the crankcase 2. Similarly, when the engine speed is low and the load is low, the air leakage of the piston is low, the ventilation flow demand of the crankcase 2 is low, and the rotation speed of the rotor 12 is also low, so that the air flow speed of the crank regulator 1 is reduced, and the air flow entering the crankcase 2 is reduced, so as to match the ventilation demand of the crankcase 2.

Example 2

As shown in fig. 7 to 9, the present embodiment further provides a positive crankcase ventilation regulating system, which includes a crankcase 2, a cylinder head 3, a cylinder head cover 4, an air-oil separator 5, and the crank adjuster 1 in the above embodiment, wherein the crank adjuster 1 is mounted on the cylinder head cover 4, and an air outlet 112 of the crank adjuster 1 is communicated to a ventilation channel in the cylinder head cover 4.

Specifically, the cylinder head 3 is mounted above the crankcase 2 by dowel pins and can be fastened by high-strength bolts; the cylinder cover 4 is arranged above the cylinder cover 3 through a positioning pin and can be fastened through a bolt; the oil-gas separator 5 is arranged above the cylinder head cover 4 and can be fastened through bolts, and the two outlet positions of the oil-gas separator 5 are respectively provided with a one-way valve 18 so as to control the gas output of the oil-gas separator 5; the crank adjuster 1 is installed on the side of the cylinder head 3 and the cylinder head cover 4, and can be fastened by bolts; the pulse modulation valve 143 is mounted on the crank regulator 1 and fastened by bolts. Wherein, the pulse modulation valve 143 of the curved regulator 1 is connected with the controller through the wire harness, the spindle 15 of the curved regulator 1 is connected with camshaft 6 of the engine, the camshaft 6 is installed on camshaft groove 61 on the cylinder head 2, is compacted through the camshaft bearing cap, and fasten with the bolt; the parts can be sealed by a solid gasket or a liquid gasket.

The working principle of the positive crankcase ventilation adjusting system is as follows:

as shown in fig. 9, when the engine is running, external air is filtered by the air cleaner 8, and a part of the air enters the crankcase 2 through the throttle valve 7; the other part enters the crank adjuster 1 through the air inlet 111 and flows into a ventilation passage surrounded by the cylinder head 3 and the cylinder head cover 4 after being adjusted by the crank adjuster 1. The crank gas enters the ventilation channel inside the cylinder cover 3 from the ventilation channel inside the crankcase 2, then enters the ventilation channel surrounded by the cylinder cover 3 and the cylinder cover 4, is combined with the air flow adjusted by the crank adjuster 1, and finally flows to the oil-gas separator 5 from the opening on the cylinder cover 4, the oil-gas separator 5 separates the engine oil from the crank gas, the separated engine oil flows back to the oil pan again, and the separated gas enters the cylinder for combustion through two channels. Wherein, one channel is a small load channel, and the separated gas enters the cylinder for combustion from an internal closed curved channel consisting of an oil-gas separator 5, a cylinder head cover 4 and a cylinder head 3; the other path of the channel is a large-load channel, and the gas at the outlet of the oil-gas separator 5 is guided into the air inlet pipeline behind the air filter 8 through an external pipeline and enters the cylinder along with the air for combustion.

The higher the engine load and the higher the engine speed, the more the crank gas leaks into the crankcase 2 via the piston rings, and the faster the crank gas flow is required. The flow of the crank regulator 1 is determined by the rotating speed of the rotor 12 and the eccentricity between the rotor 12 and the stator 13, the rotating speed of the rotor 12 is determined by the rotating speed of the engine and changes in the same direction with the rotating speed of the engine, when the eccentricity is not changed, the flow of the crank regulator 1 increases along with the increase of the rotating speed of the engine, the crank gas flow is enhanced automatically along with the increase of the rotating speed of the engine, and the effect of enhancing the crank gas flow is weakened automatically along with the decrease of the rotating speed of the engine. When the current pressure is lower, the pressure in the crankcase 2 needs to be increased; at this time, the controller increases the current duty ratio, the cavity pressure of the regulation cavity 116 increases, and the stator 13 swings away from the regulation cavity 116. When the current pressure is higher, the pressure in the crankcase 2 needs to be reduced; at this time, when the current duty ratio is decreased, the cavity pressure of the adjustment cavity 116 is decreased, and the stator 13 swings toward the adjustment cavity 116.

Under the effect of the crank regulator 1, the flow speed of crank gas from the cylinder head cover 4 to the oil-gas separator 5 is accelerated, the separation speed of the oil-gas separator 5 is accelerated, the oil-gas separation efficiency is improved, meanwhile, the residence time of the crank gas in the crankcase 2 is shortened, the problems of deterioration and thinning of engine oil are greatly improved, and the engine main body structure does not need to be changed to realize the operation.

Further, the crank adjuster 1 further includes front cover plates 16 installed on both end surfaces of the base 11, the front cover plates 16 are sealed at the open ends of the cavities 113 to seal the entire cavities 113, and the front cover plates 16 are provided with holes through which the rotating shafts 15 pass and holes through which the air outlets 112 are connected to the outside.

Optionally, a hole on the front cover plate 16 through which the rotating shaft 15 passes and a hole through which the air outlet 112 is connected to the outside are provided with sealing rings to seal, so as to prevent air in the crank regulator 1 from leaking and causing air pressure change of the crank regulator 1, thereby affecting the adjusting performance of the crank regulator 1.

Example 3

As shown in fig. 10, the present embodiment provides a crank regulation method for controlling the crank regulator 1 as above to regulate the gas flow rate into the crankcase 2, which is characterized by comprising the following steps executed by the controller:

s101: the current pressure of the crankcase is captured.

In the present 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: 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.

The controller generates a current duty ratio according to the current pressure, controls the pulse modulation valve 143 to work according to the current duty ratio, and adjusts the eccentricity of the eccentric rotating assembly to adjust the gas flow entering the crankcase 2, so that the current pressure of the crankcase 2 can be ensured within a normal range, and the phenomenon that the current pressure of the crankcase 2 is too high to cause the leakage of the engine oil from the inside to the outside or the current pressure of the crankcase 2 is too low to cause the external air to enter the inside of the crankcase 2 to pollute the engine oil and corrode parts is avoided. Meanwhile, the pulse modulation valve 143 is controlled to work by using the current duty ratio, so that fresh air can continuously enter the crankcase 2, the gas circulation is good, the continuous flow of a crankcase ventilation body in the crankcase 2 is ensured, the current pressure of the crankcase 2 is ensured to be in a normal range, and the problems that when the current pressure of the crankcase 2 is too low, the PCV valve is closed, the gas in the crankcase 2 has poor fluidity, the flow speed of the crankcase ventilation gas is slow, and the crankcase ventilation gas is condensed are solved; the current duty ratio is used for controlling the pulse modulation valve 143 to adjust the eccentricity of the eccentric rotating assembly, and when the eccentricity is larger, the gas flow entering the crankcase 2 in unit time is larger; when the eccentricity is smaller, the smaller the gas flow entering the crankcase 2 in unit time is, so that the flow of the crank gas in the crankcase 2 is accelerated, the residence time of the crank gas in the crankcase 2 is shortened, the oil-gas separation efficiency is improved, and the problems of deterioration and dilution of engine oil are greatly improved.

The present embodiment provides a method of regulating the crank throw to obtain the current pressure of the crankcase 2. According to the current pressure, the current duty ratio is determined, the pulse modulation valve 143 is controlled to work according to the current duty ratio, and the eccentricity of the eccentric rotating assembly is adjusted, so that the flow of the crank gas in the crankcase 2 is accelerated, the detention time of the crank gas in the crankcase 2 is shortened, the oil-gas separation efficiency is improved, and the problems of deterioration and dilution of engine oil are greatly improved.

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

step S102, namely 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, wherein the step S comprises the following steps: and determining the 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.

Specifically, when 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 eccentricity between the stator 13 and the rotor 12 is, the smaller the volume of the air cavity corresponding to the position of the air outlet 112 is; when the current pressure is higher, the pressure in the crankcase 2 needs to be reduced; at this time, the current duty ratio is reduced, the smaller the eccentricity 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, so as to adjust the flow rate of the gas entering the crankcase 2, thereby ensuring that the current pressure of the crankcase 2 is within a normal range, and avoiding that the current pressure of the crankcase 2 is too high, which causes the leakage of the engine oil from the inside to the outside, or the current pressure of the crankcase 2 is too low, and the outside air enters the inside of the crankcase 2, which pollutes the engine oil and corrodes the parts.

As an example, as shown in fig. 11, determining a current duty ratio according to a current pressure, and controlling the pulse modulation valve to operate according to the current duty ratio to adjust a cavity pressure of the adjustment cavity to adjust an eccentricity between the stator and the rotor, includes:

s111: and if the current pressure is greater than the atmospheric pressure, reducing the current duty ratio of the pulse modulation valve so as to reduce the cavity pressure of the regulating cavity and reduce the eccentricity between the stator and the rotor.

When the current pressure is greater than the atmospheric pressure, the controller increases the current duty cycle, control pulse modulation valve 143 adjusts the first aperture increase between low pressure air intake hole 1412 and pressure venthole 1411, the second aperture between high pressure air intake hole 1413 and pressure venthole 1411 reduces, at this moment, increase the gas of lower pressure in the chamber 114 that admits air and get into and adjust chamber 116, and reduce in the gas outlet chamber 115 in higher pressure gas gets into and adjusts chamber 116, then adjust the cavity pressure of chamber 116 and reduce, the eccentricity of stator 13 and rotor 12 reduces, therefore, reduce the gas flow who gets into crankcase 2, guarantee that the current pressure of crankcase 2 keeps in normal range, and can accelerate the flow velocity of crank gas, shorten the detention time of crank gas in crankcase 2, improve oil-gas separation efficiency.

S112: and if 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 of the stator and the rotor to be increased.

When the current pressure is lower than the atmospheric pressure, the controller reduces the current duty ratio, controls the pulse modulation valve 143 to adjust the first opening degree between the low-pressure gas taking hole 1412 and the pressure gas outlet hole 1411 to be reduced, and controls the second opening degree between the high-pressure gas taking hole 1413 and the pressure gas outlet hole 1411 to be increased; at this moment, the gas with lower pressure in the gas inlet cavity 114 is reduced to enter the adjusting cavity 116, and the gas with higher pressure in the gas outlet cavity 115 is increased to enter the adjusting cavity 116, so that the cavity pressure of the adjusting cavity 116 is increased, the eccentricity of the stator 13 and the rotor 12 is increased, and therefore, the gas flow entering the crankcase 2 can be increased, the current pressure of the crankcase 2 is kept in a normal range, meanwhile, fresh air enters the crankcase 2, the flowing speed of the crank gas is increased, the detention time of the crank gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

In the method for adjusting the crank angle provided by this embodiment, if the current pressure is greater than the atmospheric pressure, the current duty ratio of the pulse modulation valve 143 is decreased to decrease the cavity pressure of the adjustment cavity 116, so as to adjust the eccentricity between the stator 13 and the rotor 12 to decrease. If the current pressure is not greater than the atmospheric pressure, the current duty ratio of the pulse modulation valve 143 is increased to increase the cavity pressure of the adjusting cavity 116, so as to adjust the eccentricity increase of the stator 13 and the rotor 12, so as to increase the gas flow entering the crankcase 2, and ensure that the current pressure of the crankcase 2 is kept in a normal range, meanwhile, fresh air enters the crankcase 2, so that the flow speed of the crank gas is increased, the residence time of the crank gas in the crankcase 2 is shortened, and the oil-gas separation efficiency is improved.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.

Claims

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 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 pulse modulation valve is connected with 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;

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;

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;

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;

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;

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:

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: