Multifunctional valve, supercharged engine assembly and method for using the multifunctional valve

Abstract

The present invention relates to the field of vehicle engineering technology, and discloses a multifunctional valve, a supercharged engine assembly, and a method for using the multifunctional valve. The valve body is provided with a mounting groove, and the inner wall of the mounting groove is provided with an exhaust inlet, a bypass exhaust port, and a turbine inlet; the valve core can be rotatably installed in the mounting groove through the opening of the mounting groove, and the valve core is provided with a first blocking portion and a second blocking portion in the circumference of the mounting groove; the mounting plate is used to seal the opening of the mounting groove; when the valve core rotates, it includes a first state, a second state, a third state, and a fourth state, the first state is that the bypass exhaust port is blocked by the first blocking portion, and the exhaust inlet and the turbine inlet are not blocked; the second state is that the bypass exhaust port, the exhaust inlet, and the turbine inlet are not blocked; the third state is that the bypass exhaust port and the exhaust inlet are not blocked, and the turbine inlet is blocked by the second blocking portion; the fourth state is that the bypass exhaust port is not blocked, the exhaust inlet is blocked by the first blocking portion, and the turbine inlet is blocked by the second blocking portion.

Description

Technical Field

[0001] The present invention relates to the field of vehicle engineering technology, and in particular to a multifunctional valve, a supercharged engine assembly and a method for using the multifunctional valve. Background Art

[0002] At present, the power boost of the engine is mainly achieved by using a supercharger, and the control of the supercharger is achieved through a bypass control valve. The bypass control valve cannot directly control the flow area of ​​the turbine inlet, and can only indirectly control the exhaust flow entering the turbine by controlling the flow area of ​​the bypass valve. The problem caused by the bypass control valve's inability to directly control the flow area of ​​the turbine inlet is that the engine may have a minimum boost pressure higher than the target pressure value under low load conditions. Whether the bypass control valve is controlled by self-intake or external intake, this problem cannot be solved. The current solution is to reduce the throttle opening and control the amount of intake air required to enter the engine, which increases the pumping loss. The auxiliary braking of the engine is generally achieved by an exhaust brake valve, which is installed after the supercharger and is relatively far from the exhaust pipe outlet, affecting the auxiliary braking effect of the engine.

[0003] Based on this, there is an urgent need for a multifunctional valve, a supercharged engine assembly and a method for using the multifunctional valve to solve the above-mentioned problems. Summary of the invention

[0004] Based on the above, the purpose of the present invention is to provide a multifunctional valve, a supercharged engine assembly and a method for using the multifunctional valve, which realizes the precise control of the supercharger and the function of the exhaust brake valve of the engine. Under low-load conditions of the engine, the intake flow area of ​​the turbine end of the supercharger is precisely controlled by this multifunctional valve, thereby reducing pumping losses and improving engine efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In one aspect, a multifunctional valve is provided, comprising:

[0007] A valve body, wherein the valve body is provided with a mounting groove, and an inner wall of the mounting groove is provided with an exhaust inlet, a bypass exhaust port and a turbine inlet;

[0008] A valve core, the valve core is rotatably installed in the installation groove through the opening of the installation groove, and a first blocking portion and a second blocking portion are provided in the circumference of the valve core;

[0009] A mounting plate, used to seal the opening of the mounting slot;

[0010] The valve core includes a first state, a second state, a third state and a fourth state when rotating.

[0011] The first state is that the bypass exhaust port is blocked by the first blocking portion, and the exhaust inlet and the turbine inlet are not blocked;

[0012] The second state is that the bypass exhaust port, the exhaust inlet and the turbine inlet are not blocked;

[0013] The third state is that the bypass exhaust port and the exhaust inlet are not blocked, and the turbine inlet is blocked by the second blocking portion;

[0014] The fourth state is that the bypass exhaust port is not blocked, the exhaust inlet is blocked by the first blocking portion, and the turbine inlet is blocked by the second blocking portion.

[0015] As a preferred technical solution of a multifunctional valve, the valve core includes two side plates, a gas flow channel is provided between the two side plates, and the gas flow channel is located between the first blocking portion and the second blocking portion.

[0016] As a preferred technical solution of a multifunctional valve, the first blocking portion is a first sealing blade, the second blocking portion is a second sealing blade, and the first sealing blade and the second sealing blade are sealed and installed between the two side plates.

[0017] As an optimal technical solution for a multifunctional valve, the mounting plate is provided with a first bearing, and a rotating shaft is provided on the side plate on the side away from the bottom of the mounting groove. The rotating shaft can be rotatably connected to the first bearing and connected to a driving member, and the driving member can drive the valve core to rotate.

[0018] As a preferred technical solution for a multifunctional valve, a second bearing is provided at the bottom of the installation groove, and a positioning shaft is provided on the side plate close to the bottom of the installation groove, and the positioning shaft is rotatably connected to the second bearing.

[0019] As a preferred technical solution of a multifunctional valve, a flange is provided on the valve body, and the mounting plate is detachably mounted on the flange by screws.

[0020] As a preferred technical solution of a multifunctional valve, a sealing gasket is provided between the mounting plate and the flange.

[0021] In a second aspect, a supercharged engine assembly is provided, comprising an engine, a supercharger and a multifunctional valve as described in any one of the above, wherein the exhaust inlet is connected to the exhaust port of the engine, the turbine inlet is connected to the turbine end of the supercharger, and the bypass exhaust port is connected to the exhaust pipe.

[0022] In a third aspect, a method for using a multifunctional valve is provided, wherein the multifunctional valve is used in the supercharged engine assembly described above, and the method for using the multifunctional valve comprises:

[0023] When the engine requires the supercharger to work at full load, the valve core rotates to the first state;

[0024] When the intake boost pressure is higher than the target pressure required by the engine, the valve core rotates from the first state to the second state and the third state in sequence. During the process of the valve core rotating from the first state to the second state, the communication area between the exhaust inlet and the bypass exhaust port is gradually increased. During the process of the valve core rotating from the second state to the third state, the communication area between the exhaust inlet and the turbine inlet is gradually reduced.

[0025] When the engine needs an auxiliary braking function, the valve core rotates from the third state to the fourth state, and the flow area of ​​the exhaust inlet is gradually reduced during the process of the valve core rotating from the third state to the fourth state.

[0026] As a preferred technical solution for a method of using a multifunctional valve, when the valve core rotates from the first state to the second state and the third state, the throttle opening of the engine is increased while satisfying the engine intake condition.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a multifunctional valve, a supercharged engine assembly and a method for using the multifunctional valve. The target pressure required by the engine is controlled by the rotation position of the valve core. When the engine requires the supercharger to work at full load, the valve core rotates to a first state, the exhaust inlet and the turbine inlet achieve a maximum communication area, and the supercharger is in full load operation.

[0029] When the intake boost pressure is higher than the target pressure required by the engine, the valve core rotates from the first state to the second state and the third state in sequence. During the process of the valve core rotating from the first state to the second state, the connection area between the exhaust inlet and the bypass exhaust port is gradually increased, and the connection area between the exhaust inlet and the turbine inlet is kept at the maximum. Part of the engine exhaust is discharged from the supercharger bypass exhaust port 13, thereby realizing the control of the supercharger's boost capacity and ensuring that the engine can obtain the required boost pressure.

[0030] If the intake boost pressure is still higher than the target pressure value required by the engine, the valve core rotates from the second state to the third state, so that the connection area between the exhaust inlet and the turbine inlet is gradually reduced, and the engine exhaust gas discharged from the turbine inlet is reduced, thereby achieving control of the supercharger's boost capacity and ensuring that the engine can obtain the required boost pressure.

[0031] When the engine needs auxiliary braking function, the valve core rotates to the fourth state, the exhaust gas of the engine cannot be discharged, and the auxiliary braking capacity of the engine is maximized.

[0032] The invention realizes the precise control of the supercharger and the function of the exhaust brake valve of the engine. Under the condition of low engine load, the multifunctional valve can precisely control the intake flow area of ​​the turbine end of the supercharger, reduce pumping loss, and improve engine efficiency. The multifunctional valve is arranged in front of the turbine end of the supercharger, closer to the exhaust pipe, and the exhaust brake effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0034] Figure 1 is a structural schematic diagram of a multifunctional valve provided in a specific embodiment of the present invention;

[0035] Figure 2 is a structural exploded diagram of a multifunctional valve provided in a specific embodiment of the present invention;

[0036] Figure 3 is a cross-sectional view of a valve core rotated to a first state provided by a specific embodiment of the present invention;

[0037] Figure 4 is a cross-sectional view of a valve core rotated to a second state provided by a specific embodiment of the present invention;

[0038] Figure 5 is a cross-sectional view of a valve core rotated to a third state provided by a specific embodiment of the present invention;

[0039] Figure 6 It is a cross-sectional view of the valve core provided in a specific embodiment of the present invention when it rotates to a fourth state.

[0040] The following are marked in the figure:

[0041] 1. Valve body; 11. Mounting groove; 12. Exhaust inlet; 13. Bypass exhaust port; 14. Turbine inlet; 15. Flange;

[0042] 2. valve core; 21. first blocking portion; 22. second blocking portion; 23. gas flow channel; 24. side plate; 25. rotating shaft;

[0043] 3. Mounting plate; 4. First bearing; 5. Second bearing. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] like Figure 1-Figure 6 As shown, this embodiment provides a multifunctional valve, which includes a valve body 1, a valve core 2 and a mounting plate 3.

[0049] Specifically, the valve body 1 is provided with a mounting groove 11, and the inner wall of the mounting groove 11 is provided with an exhaust inlet 12, a bypass exhaust port 13 and a turbine inlet 14; the valve core 2 can be rotatably installed in the mounting groove 11 through the opening of the mounting groove 11, and the valve core 2 is provided with a first blocking portion 21 and a second blocking portion 22 in the circumferential direction; the mounting plate 3 is used to seal the opening of the mounting groove 11; when the valve core 2 rotates, it includes a first state, a second state, a third state and a fourth state, and the first state is that the bypass exhaust port 13 is closed. The first blocking portion 21 is blocked, and the exhaust inlet 12 and the turbine inlet 14 are not blocked; the second state is that the bypass exhaust port 13, the exhaust inlet 12 and the turbine inlet 14 are not blocked; the third state is that the bypass exhaust port 13 and the exhaust inlet 12 are not blocked, and the turbine inlet 14 is blocked by the second blocking portion 22; the fourth state is that the bypass exhaust port 13 is not blocked, the exhaust inlet 12 is blocked by the first blocking portion 21, and the turbine inlet 14 is blocked by the second blocking portion 22. This embodiment also provides a supercharged engine assembly, including an engine, a supercharger and a multifunctional valve, the exhaust inlet 12 is connected to the exhaust port of the engine, the turbine inlet 14 is connected to the turbine end of the supercharger, and the bypass exhaust port 13 is connected to the exhaust pipeline.

[0050] When used, the target pressure required by the engine is controlled by the rotation position of the valve core 2. When the engine requires the supercharger to work at full load, the valve core 2 rotates to the first state, the exhaust inlet 12 and the turbine inlet 14 achieve the maximum communication area, and the supercharger is in full load operation. When the intake boost pressure is higher than the target pressure required by the engine, the valve core 2 rotates from the first state to the second state and the third state in sequence. During the process of the valve core 2 rotating from the first state to the second state, the communication area between the exhaust inlet 12 and the bypass exhaust port 13 is gradually increased, and the communication area between the exhaust inlet 12 and the turbine inlet 14 is kept at the maximum, and part of the engine exhaust is discharged from the supercharger bypass exhaust port 1313, thereby realizing the control of the supercharger's supercharging capacity and ensuring that the engine can obtain the required supercharging pressure. If the intake boost pressure is still higher than the target pressure value required by the engine, during the process of the valve core 2 rotating from the second state to the third state, the communication area between the exhaust inlet 12 and the turbine inlet 14 is gradually reduced, and the engine exhaust gas discharged from the turbine inlet 14 is reduced, thereby realizing the control of the supercharger's supercharging capacity and ensuring that the engine can obtain the required supercharging pressure. When the engine needs auxiliary braking function, the valve core 2 rotates to the fourth state, and the exhaust of the engine cannot be discharged, so that the auxiliary braking capacity of the engine is maximized. This embodiment realizes the precise control of the supercharger and the function of the exhaust brake valve of the engine. Under the condition of low engine load, the intake flow area of ​​the turbine end of the supercharger is precisely controlled by this multifunctional valve, which reduces pumping loss and improves engine efficiency. The multifunctional valve is arranged in front of the turbine end of the supercharger, which is closer to the exhaust pipe, and the exhaust braking effect is more obvious.

[0051] Furthermore, the valve core 2 includes two side plates 24, and a gas flow channel 23 is arranged between the two side plates 24. The gas flow channel 23 is located between the first blocking portion 21 and the second blocking portion 22. The gas can flow in the gas flow channel 23 to realize the conduction of the gas in the multi-functional valve. The gas flow channel 23 can control the connection area between the exhaust inlet 12 and the turbine inlet 14 and the bypass exhaust port 13.

[0052] Preferably, the first blocking portion 21 is a first sealing blade, and the second blocking portion 22 is a second sealing blade, and the first sealing blade and the second sealing blade are sealed and installed between the two side plates 24. The first sealing blade is U-shaped, and during the rotation of the first sealing blade, it is sealed and connected to the inner wall of the mounting groove 11, and the first sealing blade can selectively block the exhaust inlet 12 and the bypass exhaust port 13. The second sealing blade is also U-shaped, and during the rotation of the second sealing blade, it is sealed and connected to the inner wall of the mounting groove 11, and the first sealing blade can selectively block the turbine inlet 14.

[0053] Furthermore, the mounting plate 3 is provided with a first bearing 4, and a rotating shaft 25 is provided on the side plate 24 on the side of the groove bottom away from the mounting groove 11. The rotating shaft 25 is rotatably connected to the first bearing 4 and connected to the driving member. The driving member can drive the valve core 2 to rotate. The valve core 2 controls its rotation through the rotating shaft 25 to adjust the connection area of ​​the exhaust inlet 12, the turbine inlet 14, and the bypass exhaust port 13, thereby realizing precise control of the supercharger and the function of the exhaust brake valve.

[0054] Preferably, a second bearing 5 is provided at the bottom of the installation groove 11, and a positioning shaft is provided on the side plate 24 close to the bottom of the installation groove 11. The positioning shaft is rotatably connected to the second bearing 5. The second bearing 5 can improve the rotation stability of the valve core 2.

[0055] Furthermore, a flange 15 is provided on the valve body 1, and the mounting plate 3 is detachably mounted on the flange 15 by screws. Preferably, a sealing gasket is provided between the mounting plate 3 and the flange 15, so as to achieve a sealed connection between the mounting plate 3 and the flange 15, and fix the valve core 2 in the mounting groove 11 at the same time.

[0056] This embodiment also provides a method for using a multifunctional valve. Using the above-mentioned supercharged engine assembly, the method for using the multifunctional valve includes:

[0057] like Figure 3 As shown, when the engine requires the supercharger to work at full load, the valve core 2 rotates to the first state; the exhaust inlet 12 is connected with the turbine inlet 14 through the gas flow channel 23 of the valve core 2 to achieve the maximum area, the valve core 2 blocks the bypass exhaust port 13, and the supercharger is in full load operation.

[0058] like Figure 4 and Figure 5 As shown, when the intake boost pressure is higher than the target pressure required by the engine, the valve core 2 rotates from the first state to the second state and the third state in sequence. During the process of the valve core 2 rotating from the first state to the second state, the connection area between the exhaust inlet 12 and the bypass exhaust port 13 is gradually increased, and the connection area between the exhaust inlet 12 and the turbine inlet 14 is kept at the maximum. Part of the engine's exhaust gas is discharged from the bypass exhaust port 13, thereby realizing the control of the supercharger's boost capacity, ensuring that the engine can obtain the required boost pressure, and the supercharger is in a partial load working state.

[0059] When the valve core 2 rotates to the second state, if the intake boost pressure is still higher than the target pressure value required by the engine, the valve core 2 continues to rotate to the third state. During the process of the valve core 2 rotating from the second state to the third state, the connection area between the exhaust inlet 12 and the bypass exhaust port 13 through the gas flow channel 23 of the valve core 2 is kept at the maximum, so that the connection area between the exhaust inlet 12 and the turbine inlet 14 is gradually reduced, and the engine exhaust gas discharged from the turbine inlet 14 is reduced, thereby realizing the control of the supercharger's boosting capacity, ensuring that the engine can obtain the required boost pressure, and the supercharger is in the minimum load working state.

[0060] Preferably, during the process of the valve core 2 rotating from the first state to the second state and the third state, the throttle opening of the engine is increased while satisfying the engine intake condition, the connection area between the exhaust inlet 12 and the turbine inlet 14 is reduced as much as possible, and the throttle opening is increased as much as possible, so that the exhaust resistance at the turbine end of the supercharger and the throttling loss of the throttle can be reduced at the same time, the pumping loss can be reduced, and the engine efficiency can be improved.

[0061] like Figure 5 and Figure 6 As shown, when the engine needs auxiliary braking function, the valve core 2 rotates from the third state to the fourth state. During the process of the valve core 2 rotating from the third state to the fourth state, the flow area of ​​the exhaust inlet 12 is gradually reduced. The rotating shaft 25 is controlled to rotate the valve core 2 to different positions according to the needs of the engine auxiliary braking size. When the rotating shaft 25 controls the valve core 2 to rotate to the fourth state, the exhaust inlet 12 is completely blocked, the engine exhaust cannot be discharged, the engine auxiliary braking capacity reaches the maximum, and the function of the exhaust brake valve is realized.

[0062] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multifunctional valve, characterized in that: include: A valve body (1), the valve body (1) being provided with a mounting groove (11), the inner wall of the mounting groove (11) being provided with an exhaust inlet (12), a bypass exhaust port (13) and a turbine inlet (14); A valve core (2), the valve core (2) being rotatably installed in the installation groove (11) through the opening of the installation groove (11), and a first blocking portion (21) and a second blocking portion (22) being provided in the circumference of the valve core (2); A mounting plate (3) for sealing the opening of the mounting groove (11); The valve core (2) includes a first state, a second state, a third state and a fourth state when rotating. The first state is that the bypass exhaust port (13) is blocked by the first blocking portion (21), and the exhaust inlet (12) and the turbine inlet (14) are not blocked; The second state is that the bypass exhaust port (13), the exhaust inlet (12) and the turbine inlet (14) are not blocked; The third state is that the bypass exhaust port (13) and the exhaust inlet (12) are not blocked, and the turbine inlet (14) is blocked by the second blocking portion (22); The fourth state is that the bypass exhaust port (13) is not blocked, the exhaust inlet (12) is blocked by the first blocking portion (21), and the turbine inlet (14) is blocked by the second blocking portion (22); The valve core (2) comprises two side plates (24), a gas circulation channel (23) is provided between the two side plates (24), and the gas circulation channel (23) is located between the first blocking portion (21) and the second blocking portion (22).

2. The multifunctional valve according to claim 1, characterized in that: The first blocking portion (21) is a first sealing blade, the second blocking portion (22) is a second sealing blade, and the first sealing blade and the second sealing blade are sealingly installed between the two side plates (24).

3. The multifunctional valve according to claim 1, characterized in that: The mounting plate (3) is provided with a first bearing (4), and a rotating shaft (25) is provided on a side plate (24) at a side of the groove bottom away from the mounting groove (11), wherein the rotating shaft (25) is rotatably connected to the first bearing (4) and connected to a driving member, and the driving member is capable of driving the valve core (2) to rotate.

4. The multifunctional valve according to claim 1, characterized in that: A second bearing (5) is arranged at the bottom of the installation groove (11), and a positioning shaft is arranged on a side plate (24) close to the bottom of the installation groove (11), wherein the positioning shaft is rotatably connected to the second bearing (5).

5. The multifunctional valve according to claim 1, characterized in that: The valve body (1) is provided with a flange (15), and the mounting plate (3) is detachably mounted on the flange (15) by means of screws.

6. The multifunctional valve according to claim 5, characterized in that: A sealing gasket is provided between the mounting plate (3) and the flange (15).

7. A supercharged engine assembly, characterized in that: It comprises an engine, a supercharger and a multifunctional valve as described in any one of claims 1 to 6, wherein the exhaust inlet (12) is connected to the exhaust port of the engine, the turbine inlet (14) is connected to the turbine end of the supercharger, and the bypass exhaust port (13) is connected to the exhaust pipe.

8. A method for using a multifunctional valve, characterized in that: Using the supercharged engine assembly as claimed in claim 7, the method for using the multifunctional valve comprises: When the engine requires the supercharger to work at full load, the valve core (2) rotates to the first state; When the intake boost pressure is higher than the target pressure required by the engine, the valve core (2) rotates from the first state to the second state and the third state in sequence. During the process of the valve core (2) rotating from the first state to the second state, the communication area between the exhaust inlet (12) and the bypass exhaust port (13) gradually increases. During the process of the valve core (2) rotating from the second state to the third state, the communication area between the exhaust inlet (12) and the turbine inlet (14) gradually decreases. When the engine needs an auxiliary braking function, the valve core (2) rotates from the third state to the fourth state. During the process of the valve core (2) rotating from the third state to the fourth state, the flow area of ​​the exhaust inlet (12) is gradually reduced.

9. The method for using the multifunctional valve according to claim 8, characterized in that: During the process of the valve core (2) rotating from the first state to the second state and the third state, the throttle opening of the engine is increased when the engine intake condition is met.

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