CN216518267U

CN216518267U - Turbocharger waste gas bypass valve control mechanism and turbocharger

Info

Publication number: CN216518267U
Application number: CN202123353315.9U
Authority: CN
Inventors: 梁辰; 华伦; 朱君君; 俞毓先; 边策
Original assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Current assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-13
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to the technical field of engine turbocharging, in particular to a turbocharger waste gas bypass valve control mechanism and a turbocharger. The waste gas bypass valve control mechanism of the turbocharger comprises a membrane actuator, a gas inlet pipeline, a gas outlet pipeline, an external gas source and a pneumatic pressure regulating valve, wherein a control cavity is formed inside the membrane actuator, a gas receiving port communicated with the control cavity is formed in the membrane actuator, the gas receiving port is connected with the gas inlet pipeline and the gas outlet pipeline respectively, the pneumatic pressure regulating valve is arranged on the gas inlet pipeline and is connected with the external gas source. The pneumatic pressure regulating valve needs to be communicated with an air source to provide air pressure for the diaphragm actuator to drive the diaphragm actuator, and the structure does not need to sacrifice the boost pressure of the turbocharger to drive the diaphragm actuator, so that the normal work of the turbocharger can be ensured. In addition, the waste gas bypass valve is independently controlled through an external pneumatic pressure regulating valve, the boost pressure can be stabilized, and the reverse influence of the instantaneous boost pressure of the supercharger is avoided.

Description

Turbocharger waste gas bypass valve control mechanism and turbocharger

Technical Field

The utility model relates to the technical field of engine turbocharging, in particular to a turbocharger waste gas bypass valve control mechanism and a turbocharger.

Background

In the engine bench test, some tests need to control the supercharging pressure so as to control the air inlet state of the engine and further control the combustion state of the engine.

The wastegate valve is an indispensable part of the turbocharger, and is a mechanism that is driven by a mechanical structure under the condition of an excessively high boost pressure, and discharges part of the exhaust gas from a pipeline where the wastegate valve is located (reduces the flow rate of the exhaust gas in the exhaust volute), thereby reducing the boost pressure.

The mechanical turbocharger is used for adjusting boost pressure, and a pressure adjusting rod of a waste gas bypass valve (except for a VGT supercharger) needs to be adjusted, so that the action is time-consuming and labor-consuming, the adjusting range is inaccurate, and the efficiency is extremely low.

Therefore, a turbocharger waste gate valve control mechanism is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a turbocharger waste gas bypass valve control mechanism and a turbocharger, which can control the opening of a waste gas bypass valve through an external air source and improve the regulation efficiency.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a turbo charger waste gas bypass valve control mechanism, includes diaphragm executor, air inlet pipeline, gas release pipeline, external air supply and pneumatic air-vent valve, the inside control chamber that forms of diaphragm executor, be provided with on the diaphragm executor with the gas receiving mouth of control chamber intercommunication, the gas receiving mouth respectively with air inlet pipeline and the gas release pipeline is connected, pneumatic air-vent valve set up in on the air inlet pipeline, pneumatic air-vent valve is connected with external air supply.

As a preferable mode of the turbocharger waste gas bypass valve control mechanism, the air bleed line includes a first line and a first electromagnetic valve provided on the first line.

As a preferable mode of the turbocharger waste gas bypass valve control mechanism, the bleed air line further includes a first check valve provided in the first line, and the first check valve is configured to be communicated in one direction from the diaphragm actuator to the first solenoid valve.

As a preferable technical solution of the turbocharger waste gas bypass valve control mechanism, the air intake pipeline includes a second pipeline and a second electromagnetic valve disposed on the second pipeline, the pneumatic pressure regulating valve is disposed on the second pipeline, and the second electromagnetic valve is disposed downstream of the pneumatic pressure regulating valve.

As a preferable aspect of the turbocharger waste gas bypass valve control mechanism, the intake pipe further includes a second check valve provided on the second pipe, and the second check valve is configured to be communicated unidirectionally from the pneumatic pressure regulating valve to the diaphragm actuator.

As a preferable mode of the turbocharger waste gas bypass valve control mechanism, the first electromagnetic valve and the second electromagnetic valve are controlled to open and close by an engine ECU.

As a preferable aspect of the turbocharger waste gas bypass valve control mechanism, the turbocharger waste gas bypass valve control mechanism further includes a three-way valve, and the three-way valve is respectively communicated with the air receiving port, the first pipeline and the second pipeline.

As a preferable technical solution of the exhaust gas bypass valve control mechanism of the turbocharger, the diaphragm actuator includes an actuator body, an outer cover, a piston and a spring, the piston and the spring are disposed in a control chamber of the actuator body, a piston rod of the piston is sleeved with the spring, the spring is respectively abutted against inner walls of the piston and the actuator body, the outer cover is disposed at one end of the actuator body to seal the control chamber, and the air receiving port is disposed on the outer cover.

As a preferable technical solution of the above turbocharger waste gate valve control mechanism, the diaphragm actuator further includes a crank, the piston rod is connected to the crank, and the crank is used for pushing an opening degree of a valve of the waste gate valve.

The utility model also provides a turbocharger, which comprises a waste gas bypass valve and the control mechanism of the waste gas bypass valve of the turbocharger.

The utility model has the beneficial effects that:

the pneumatic pressure regulating valve needs to be communicated with an air source to realize that air pressure is provided for the diaphragm actuator to drive the diaphragm actuator. In addition, the waste gas bypass valve is independently controlled through an external pneumatic pressure regulating valve, the boost pressure can be stabilized, and the reverse influence of the instantaneous boost pressure of the supercharger is avoided.

Drawings

FIG. 1 is a schematic diagram of a first configuration of a turbocharger waste gate valve control mechanism according to an embodiment of the present invention;

fig. 2 is a second structural schematic diagram of a turbocharger waste gas bypass valve control mechanism provided by the embodiment of the utility model.

In the figure:

1. a diaphragm actuator; 11. an actuator body; 12. an outer cover; 13. a piston; 14. a spring; 2. connecting an external air source; 3. a pneumatic pressure regulating valve; 4. a first pipeline; 5. a first solenoid valve; 6. a second pipeline; 7. a second solenoid valve; 8. and a three-way valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The turbocharger comprises a waste gas bypass valve control mechanism, and the waste gas bypass valve control mechanism is arranged to solve the technical problems.

As shown in fig. 1, the turbocharger waste gas bypass valve control mechanism includes a diaphragm actuator 1, an air inlet pipeline, an air outlet pipeline, an external air source 2 and a pneumatic pressure regulating valve 3, wherein a control cavity is formed inside the diaphragm actuator 1, an air receiving port communicated with the control cavity is arranged on the diaphragm actuator 1, the air receiving port is respectively connected with the air inlet pipeline and the air outlet pipeline, the pneumatic pressure regulating valve 3 is arranged on the air inlet pipeline, and the pneumatic pressure regulating valve 3 is connected with the external air source 2. Compared with the prior art, the structure does not need to sacrifice the boost pressure of the turbocharger to drive the diaphragm actuator 1, and further can ensure the normal work of the turbocharger. In addition, the externally connected pneumatic pressure regulating valve 3 is used for independently controlling the waste gas bypass valve, so that the boost pressure can be stabilized, and the reverse influence of the instantaneous boost pressure of the supercharger is avoided.

Optionally, in this embodiment, the bleed line comprises a first line 4 and a first solenoid valve 5 arranged on the first line 4. The first electromagnetic valve 5 is in a normally open state, when the waste gate valve needs to be opened, the first electromagnetic valve 5 is closed, the first electromagnetic valve 5 can ensure that the waste gate valve is in a normally closed state when being opened, and the waste gate valve can be opened or closed according to actual needs.

The bleed air line further comprises a first one-way valve arranged on the first line 4, the first one-way valve being configured for one-way communication from the membrane actuator 1 to the first solenoid valve 5.

Alternatively, in this embodiment, the intake line comprises a second line 6 and a second solenoid valve 7 arranged on the second line 6, the pneumatic pressure-regulating valve 3 being also arranged on the second line 6, and the second solenoid valve 7 being arranged downstream of the pneumatic pressure-regulating valve 3. The second solenoid valve 7 is closed in the closed state of the wastegate valve, so that the partial air in the pneumatic pressure regulating valve 3 is prevented from entering the diaphragm actuator 1 and the wastegate valve is prevented from opening. Optionally, in this embodiment, the air intake pipeline further includes a second one-way valve disposed on the second pipeline 6, and the second one-way valve is configured to be communicated from the pneumatic pressure regulating valve 3 to the diaphragm actuator 1 in one way. Therefore, the gas in the diaphragm actuator 1 can be prevented from entering the air inlet pneumatic pressure regulating valve to influence the work of the pneumatic pressure regulating valve 3.

Alternatively, in the present embodiment, both the first solenoid valve 5 and the second solenoid valve 7 are controlled to open and close by the engine ECU. Therefore, the control structure can be saved, the engine ECU can cooperatively control the first electromagnetic valve 5 and the second electromagnetic valve 7 to act, and the integration performance is improved.

The first pipeline 4 and the second pipeline 6 can be connected in a welding mode, and the air inlet pipeline and the air outlet pipeline are opened and closed by opening and closing the first electromagnetic valve 5 and the second electromagnetic valve 7.

In other embodiments, optionally, as shown in fig. 2, the turbocharger waste gate valve control mechanism further comprises a three-way valve 8, and the three-way valve 8 is respectively communicated with the air receiving port, the first pipeline 4 and the second pipeline 6. The three-way valve 8 can respectively communicate the diaphragm actuator 1 with the air inlet pipeline and the diaphragm actuator 1 with the air outlet pipeline according to actual needs, so that the waste gas bypass valve can be opened and closed. In other embodiments, the three-way valve 8 may be an electric three-way valve.

Optionally, in this embodiment, the diaphragm actuator 1 includes an actuator body 11, an outer cover 12, a piston 13 and a spring 14, the piston 13 and the spring 14 are disposed in a control cavity of the actuator body 11, a piston rod of the piston 13 is sleeved with the spring 14, the spring 14 abuts against inner walls of the piston 13 and the actuator body 11, the outer cover 12 is disposed at one end of the actuator body 11 to close the control cavity, and the air receiving port is disposed on the outer cover 12. The turbocharger waste gas bypass valve control mechanism further comprises a crank, a piston rod is connected with the crank, and the crank is used for pushing the opening degree of a valve of the waste gas bypass valve. So set up, can guarantee that the piston 13 in the diaphragm executor 1 receives the gas pressure to move, after gas discharges through first solenoid valve 5, spring 14 promotes piston 13 and realizes reseing.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a turbo charger waste gas bypass valve control mechanism, its characterized in that includes diaphragm executor (1), air inlet pipeline, gas release pipeline, external air supply (2) and pneumatic air-vent valve (3), the inside control chamber that forms of diaphragm executor (1), be provided with on diaphragm executor (1) with the gas connection mouth of control chamber intercommunication, the gas connection mouth respectively with the air inlet pipeline and the gas release pipeline is connected, pneumatic air-vent valve (3) set up in on the air inlet pipeline, pneumatic air-vent valve (3) are connected with external air supply (2).

2. A turbocharger wastegate valve control mechanism according to claim 1, characterized in that the bleed air line comprises a first line (4) and a first solenoid valve (5) provided on the first line (4).

3. The turbocharger wastegate valve control mechanism according to claim 2, further comprising a first check valve provided on the first line (4), the first check valve being configured for one-way conduction from the diaphragm actuator (1) to the first solenoid valve (5).

4. A turbocharger wastegate valve control mechanism according to claim 2, characterized in that the intake conduit comprises a second conduit (6) and a second electromagnetic valve (7) disposed on the second conduit (6), the pneumatic pressure-regulating valve (3) being disposed on the second conduit (6), and the second electromagnetic valve (7) being disposed downstream of the pneumatic pressure-regulating valve (3).

5. A turbocharger wastegate valve control mechanism according to claim 4, characterized in that the intake conduit further comprises a second one-way valve disposed on the second conduit (6), the second one-way valve being configured for one-way communication from the pneumatic pressure regulating valve (3) to the diaphragm actuator (1).

6. The turbocharger wastegate valve control mechanism according to claim 4, wherein the first solenoid valve (5) and the second solenoid valve (7) are both opened and closed by control of an engine ECU.

7. The turbocharger waste gate valve control mechanism according to claim 4, characterized by further comprising a three-way valve (8), the three-way valve (8) being communicated with the gas receiving port, the first line (4), and the second line (6), respectively.

8. The turbocharger waste gas bypass valve control mechanism according to claim 6, characterized in that the diaphragm actuator (1) comprises an actuator body (11), an outer cover (12), a piston (13) and a spring (14), the piston (13) and the spring (14) are arranged in a control cavity of the actuator body (11), a piston rod of the piston (13) is sleeved with the spring (14), the spring (14) abuts against inner walls of the piston (13) and the actuator body (11), the outer cover (12) is arranged at one end of the actuator body (11) to close the control cavity, and the air receiving opening is arranged on the outer cover (12).

9. The turbocharger wastegate valve control mechanism of claim 8, further comprising a crank, said piston rod being connected to said crank, said crank being adapted to urge the opening of the wastegate valve.

10. A turbocharger comprising a wastegate valve and a turbocharger wastegate valve control mechanism according to any one of claims 1 to 9.