CN107642418B - Throttle valve and engine - Google Patents
Throttle valve and engine Download PDFInfo
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- CN107642418B CN107642418B CN201711046230.1A CN201711046230A CN107642418B CN 107642418 B CN107642418 B CN 107642418B CN 201711046230 A CN201711046230 A CN 201711046230A CN 107642418 B CN107642418 B CN 107642418B
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Abstract
The invention provides a throttling valve which comprises a throttling valve shell and a valve plate erected in the throttling valve shell, wherein the throttling valve shell comprises a valve body inlet, a valve body outlet and a throttling area arranged between the valve body inlet and the valve body outlet; the inner wall of the throttle valve shell is provided with a throttle starting point which is in close fit with the valve plate and a throttle end point when the valve plate is completely opened, and the inner wall of the throttle valve shell is also provided with a throttle curved surface which is in arc transition from the throttle starting point to the throttle end point. The inner wall of the throttle valve shell is provided with the throttle curved surface which is transited from the throttle starting point circular arc to the throttle end point, and the interval between the end part of the valve plate and the throttle curved surface is uniformly transited along with the rotation of the valve plate, so that the opening control is more accurate, the throttle valve caused by the sudden change of the throttle area of the valve plate is prevented from being unstable, the throttle control precision is more accurate, and the throttle valve control precision is improved. The invention also provides an engine provided with the throttle valve structure.
Description
Technical Field
The invention relates to the technical field of throttle valves, in particular to a throttle valve and an engine.
Background
An engine is generally provided with a plurality of valve bodies such as an intake throttle valve, a gas Trim valve, and an EGR valve. The air inlet throttle valve is used on an air inlet pipe of the engine and used for controlling air or oil-gas mixture to enter the engine. Gas Trim valves (Trim generally stands for valve Trim) are used on engine fuel supply systems to control fuel admission to the intake manifold or engine. The EGR valve is provided between an exhaust system and an intake system of an engine, and controls the intake of exhaust gas in an exhaust pipe.
The existing air inlet throttle valve and gas Trim valve have tubular shells, and the shape of an inner valve plate is usually circular. When the valve plate opening is small, the valve plate opening changes little, and the flow area of the valve body changes greatly. When the valve plate aperture is large, the influence of the valve plate aperture change on the flow area becomes small. The flow area affects the air intake and oil supply of the engine, and the problems of unstable idle speed, insensitive engine control under high load (sudden load unloading is easy to cause over-speed stop, sudden load loading is easy to cause the engine to be locked) and large horizontal bar cyclic variation (IMEP _ COV, combustion stability) are presented on the engine.
The traditional throttle valve is limited by the structure, and has the characteristics of insufficient control precision in a small opening degree and insensitive control in a large opening degree. The phenomena of unstable engine speed when the engine is in idle speed, severe engine drop speed or engine blocking when a load is suddenly applied and the like are shown on the engine, and a lot of inconvenience and difficulty are brought to the calibration of the engine.
therefore, how to improve the control accuracy of the opening degree of the throttling device is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
in view of the above, the present invention provides a throttle valve to improve the control accuracy of the opening of the throttle device; the invention also provides an engine.
In order to achieve the purpose, the invention provides the following technical scheme:
A throttle valve comprises a throttle valve shell and a valve plate arranged in the throttle valve shell, wherein the throttle valve shell comprises a valve body inlet, a valve body outlet and a throttle area arranged between the valve body inlet and the valve body outlet, and the valve plate is arranged in the throttle area;
The inner wall of the throttle valve shell is provided with a throttle starting point in close fit with the valve plate and a throttle end point when the valve plate is completely opened, and the inner wall of the throttle valve shell is also provided with a throttle curved surface which is in arc transition from the throttle starting point to the throttle end point.
Preferably, in the above throttle valve, the valve plate includes a first throttle position and a second throttle position, which are vertically arranged and located at the start point and the end point of the throttle, respectively.
Preferably, in the throttle valve described above, the throttle opening angle θ formed by the valve plate and the first throttle position when the valve plate is throttled in rotation; the throttling distance d between the end part of the valve plate and the throttling curved surface is in a linear and direct proportional relation with the throttling opening angle theta.
Preferably, in the throttle valve, the throttle area includes a closing radius R at which the valve plate is closed and a throttle radius R at which the valve plate is opened to a throttle position, the throttle distance d is a difference between the closing radius R and the throttle radius R, and a proportionality coefficient between the throttle distance and the throttle opening angle is R/(150 to 200).
Preferably, in the above throttle valve, a proportionality coefficient of the throttle pitch and the throttle opening angle is R/180.
Preferably, in the throttle valve, when the valve plate rotates in a throttling manner, a throttling flow area is defined between the valve plate and the throttling curved surface, and a flow area S of the throttling flow area is in a linear and direct proportional relationship with the throttling opening angle.
preferably, in the throttle valve, a differential pressure sensor for monitoring a flow difference between the valve body inlet and the valve body outlet is further disposed on the throttle valve housing.
Preferably, in the above throttle valve, a first pressure sensor for monitoring a flow rate pressure at an inlet of the valve body and a second pressure sensor for monitoring a flow rate pressure at an outlet of the valve body are provided in the throttle valve housing, respectively.
An engine provided with a throttle valve that adjusts an intake air amount, the throttle valve being the throttle valve described in any one of the above.
The throttle valve provided by the invention comprises a throttle valve shell and a valve plate erected in the throttle valve shell, wherein the throttle valve shell comprises a valve body inlet, a valve body outlet and a throttle area arranged between the valve body inlet and the valve body outlet, and the valve plate is erected in the throttle area; the inner wall of the throttle valve shell is provided with a throttle starting point which is in close fit with the valve plate and a throttle end point when the valve plate is completely opened, and the inner wall of the throttle valve shell is also provided with a throttle curved surface which is in arc transition from the throttle starting point to the throttle end point. The valve plate is positioned in the throttling valve shell, fluid flows in through the valve body inlet and flows out from the valve body outlet, flow control is carried out through the turnover angle of the valve plate in the throttling valve shell, and the valve plate is arranged in a turnover area between the throttling valve shells and is a throttling area for regulating the flow. The throttle valve shell is arranged at the throttle starting point, the inner wall of the throttle valve shell is in close fit with the valve plate, the valve plate is completely opened at the throttle ending point, and the valve plate adjusts the flow through the change of the distance between the valve plate and the inner wall of the throttle valve shell between the throttle starting point and the throttle ending point. The inner wall of the throttle valve shell is provided with the throttle curved surface which is transited from the throttle starting point circular arc to the throttle end point, and the interval between the end part of the valve plate and the throttle curved surface is uniformly transited along with the rotation of the valve plate, so that the opening control is more accurate, the throttle valve is prevented from being unstable due to sudden change of the throttle area of the valve plate, the throttle control precision is more accurate, and the control precision of the throttle valve is improved.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a sectional view of the throttle valve according to the present invention;
FIG. 2 is a front sectional view of the throttle valve according to the present invention;
Fig. 3 is a structural sectional view of fig. 2 as seen from the right.
Detailed Description
The invention discloses a throttle valve, which improves the control precision of the opening of a throttle device; the invention also provides an engine.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a sectional view of an upper view structure of a throttle valve provided by the present invention; FIG. 2 is a front sectional view of the throttle valve according to the present invention; fig. 3 is a structural sectional view of fig. 2 as seen from the right.
the invention provides a throttling valve, which comprises a throttling valve shell 1 and a valve plate 2 erected in the throttling valve shell 1, wherein the throttling valve shell 1 comprises a valve body inlet 11, a valve body outlet 12 and a throttling area arranged between the valve body inlet 11 and the valve body outlet 12, and the valve plate 2 is erected in the throttling area; the inner wall of the throttle valve shell 1 is provided with a throttle starting point 14 matched with the valve plate 2 in a closed mode and a throttle end point 15 when the valve plate 2 is completely opened, and the inner wall of the throttle valve shell 1 is further provided with a throttle curved surface 13 in an arc transition from the throttle starting point 14 to the throttle end point 15. The valve plate 2 is positioned in the throttle valve shell 1, fluid flows in through the valve body inlet 11 and flows out through the valve body outlet 12, flow control is carried out through the turnover angle of the valve plate 2 in the throttle valve shell 1, and the valve plate 2 is in the turnover area between the throttle valve shell 1 and is a throttling area for regulating the flow. The throttle valve housing 1 is at the throttle starting point 14, the inner wall thereof is in close fit with the valve plate 2, the valve plate 2 is fully opened at the throttle ending point 15, and the valve plate 2 adjusts the flow rate by changing the distance between the inner wall and the throttle housing 1 between the throttle starting point 14 and the throttle ending point 15. The inner wall of the throttle valve shell 1 is provided with the throttle curved surface 13 which is in arc transition from the throttle starting point 14 to the throttle ending point 15, and the distance between the end part of the valve plate 2 and the throttle curved surface 13 is uniformly transited along with the rotation of the valve plate 2, so that the opening control is more accurate, the throttle valve caused by the sudden change of the throttle area of the valve plate 2 is prevented from being throttled unstably, the throttle control precision is more accurate, and the throttle control precision is improved.
In a particular embodiment of the present case, the valve plate 2 comprises a first throttle position, which is arranged vertically and located at the throttle start 14, and a second throttle position, which is located at the throttle end 15, respectively. Because the inner wall of the throttle valve shell 1 is of an arc transition structure, and along with the rotation of the valve plate 2, the distance between the end part of the valve plate 2 and the inner wall of the throttle valve shell 1 is gradually changed, so that the valve body inlet 11 and the throttle outlet 12 of the throttle valve are positioned on different horizontal lines, and in order to meet the installation requirements of the throttle valve, the interference generated by the rotation of the valve plate 2 on the throttle valve after the throttle valve is installed and the rotation angle of the valve plate 2 needs to be controlled. The valve plate 2 completely closes the inside of the throttling valve at the throttling starting point 14, the throttling valve is completely opened at the throttling end point 15, the position for closing the throttling valve is the first throttling position when the valve plate 2 is positioned at the throttling starting point 14, the position for completely opening the throttling valve is the second throttling position when the valve plate 2 is positioned at the throttling end point 15, and the valve plate 2 is arranged at the first throttling position and the second throttling position to be vertical to each other, namely, the throttling rotation angle of the valve plate 2 is 0-90 degrees when the valve plate 2 works in throttling, the throttling area range of the inner wall of the throttling valve shell 1 is arranged according to the rotation angle of the valve plate 2, the phenomenon that the size of the throttling valve after structure change is large is avoided, and the universality of the application range of the throttling valve.
In one embodiment of the scheme, when the valve plate 2 rotates in a throttling mode, a throttling opening angle theta is formed between the throttling opening angle theta and a first throttling position; the throttling distance d between the end part of the valve plate 2 and the throttling curved surface 13 is in linear and direct proportional relation with the throttling opening angle theta. The valve plate 2 starts to rotate from the first throttling position, the position is taken as the rotation starting point of the valve plate 2, a throttling opening angle theta is formed between the valve plate 2 and the first throttling position along with the rotation of the valve plate 2, and the flow area S of fluid in the throttling valve changes along with the change of the throttling opening angle theta. A fluid flow area is defined between the end of the valve plate 2 and the curved throttle surface 13, and the size of the partial flow area S determines the magnitude of the fluid flow rate. The flow area S between the valve body 2 and the throttling curved surface 13 is related to the distance between the end of the valve plate 2 and the throttling curved surface 13, the maximum distance between the valve plate 2 and the throttling curved surface 13 is set as a throttling distance d, the throttling distance d gradually increases along with the gradual increase of the throttling opening angle theta, the throttling distance d and the throttling opening angle theta are designed in a linear and direct proportional relation, the throttling distance d between the valve plate and the throttling curved surface can be accurately controlled through controlling the throttling opening angle theta, namely, the accurate variable quantity can be obtained for the flow of the throttling valve, the control of the engine throttling valve is adapted, the air inflow can be accurately controlled, and the working efficiency and the energy saving performance of the engine are improved.
Certainly, the corresponding relation between the throttling curved surface 13 and the throttling opening angle theta of the valve plate can be set according to different corresponding relations, the working requirements of different working conditions are met, due to the structural design of the throttling curved surface, the purpose of accurately controlling the throttling flow is achieved through the corresponding relation between the throttling opening angle theta and the throttling distance d, and the control accuracy of the throttling valve is improved.
In a specific embodiment of the scheme, the throttling area comprises a closed radius R of the valve plate 2 and a throttling radius R when the valve plate 2 is opened to a throttling position, the throttling distance d is a difference value between the closed radius R and the throttling radius R, and a proportionality coefficient between the throttling distance d and a throttling opening angle theta is R/(150-200).
Meanwhile, when the valve plate rotates in a throttling mode, a throttling circulation area is defined between the valve plate and the throttling curved surface, and the circulation area S of the throttling circulation area and the throttling opening angle are in a linear and direct proportional relation.
Therefore, the flow area S of the throttle valve can be accurately controlled by a proportional calculation because of the linear proportional relationship between the throttle opening angle θ of the valve plate and the throttle pitch d.
Specifically, a closing radius R and a throttling radius R are set, a proportional coefficient of a throttling opening angle theta and a throttling distance d is set to be k, and then a polar coordinate system equation of a track of a throttling curved surface is as follows:
R-R + k θ, where θ is 0 ° to 90 °;
Thereby obtaining the relation between the throttling distance d and the throttling opening angle theta;
d＝r-R＝kθ；
Through the relation of throttle interval and throttle opening angle, when the throttle opening angle that can obtain the valve plate is theta, the flow area S of corresponding position choke valve when setting for the valve plate and opening, the girth that corresponds the throttle curved surface is L, then:
L＝2(π*R+2*d)；
S＝2(πR*d)；
The derivation is:
S＝2(πR*kθ)；
When the throttle opening angle θ is 90 °, it is possible to obtain:
S＝πR2；
The derivation is:
2(πR*k*90)＝πR2；
Further obtaining:
k＝R/180。
From the above derivation, it can be seen that when R is a constant and k is a constant related to R, the flow area S is linearly proportional to the throttle opening angle θ.
when k is equal to R/180, the maximum flow area can be obtained through the minimum throttle valve volume, certainly, the scheme is not limited to that k is equal to R/180, a proportionality coefficient k is set to be R/(150-200), k is a constant related to the maximum opening of a throttle opening angle, and the maximum opening angle of a valve plate is controlled to obtain valve bodies in different flow control ranges, so that the valve bodies can be controlled in different opening ranges, and different control effects on the throttle valves can be obtained according to different use environments.
Preferably, the proportionality coefficient between the throttle spacing d and the throttle opening angle θ is R/180.
The throttle valve structure is applied to the field of engines, is used for the function of a throttle valve, is arranged on an air inlet pipeline of an engine, can overcome the defects of unstable idling of the engine and poor control capability of the rotating speed of the engine when a high-load suddenly-loaded load is added or removed, and also reduces the calibration complexity of a system.
The method is used for controlling fuel supply, can enable the fuel control of the engine to be more accurate, and has great improvement effect on engine calibration, fuel correspondence and air-fuel ratio control.
the method is used for the function of the EGR valve, can improve the control precision of the EGR law and reduce the calibration difficulty.
In an embodiment of the present disclosure, the throttle housing 1 is further provided with a differential pressure sensor 3 for monitoring a flow difference between the valve body inlet 11 and the valve body outlet 12. In the field of automobiles, when the throttle valve is applied, the opening of the throttle valve is controlled by an automobile ECU (electronic control Unit), and for accurately acquiring the flow area of the throttle valve, the flow difference between the inlet of the valve body and the outlet of the valve body is accurately acquired by arranging a differential pressure sensor, so that the flow monitoring of the throttle valve is realized in real time.
In an embodiment of the present disclosure, the throttle valve housing 1 is provided with a first pressure sensor for monitoring the flow pressure at the valve body inlet and a second pressure sensor for monitoring the flow pressure at the valve body outlet 12. The flow pressure of the fluid flowing through the throttle valve can be obtained through the first pressure sensor and the second pressure sensor which are respectively arranged at the inlet of the valve body and the outlet of the valve body.
the differential pressure sensor 3 is fixedly installed through a bolt, and a throttle valve front pressure taking port 5 and a throttle valve rear pressure taking port 6 are arranged on the throttle valve shell 1 so as to accurately monitor the pressure of the throttle valve inlet and outlet.
Through the detection to the throttle valve flow, through pressure, differential pressure sensor and, controllable flow area of choke valve, can be according to Bernoulli's equation, the fluid flow of accurate acquisition choke valve circulation obtains flow feedback, further realizes the precision to throttle valve control, solves the choke valve poor control accuracy when little aperture, and the control accuracy is insensitive during the opening degree shortcoming.
Based on the throttle valve provided in the above embodiment, the present invention also provides an engine provided with a throttle valve that adjusts an intake air amount, the throttle valve provided in the engine adopting the throttle valve structure provided in the above embodiment.
Because the engine adopts the throttle valve of the embodiment, the engine has the beneficial effects brought by the throttle valve, please refer to the embodiment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A throttle valve is characterized by comprising a throttle valve housing and a valve plate, wherein the valve plate is erected in the throttle valve housing, the throttle valve housing comprises a valve body inlet, a valve body outlet and a throttle area arranged between the valve body inlet and the valve body outlet, and the valve plate is erected in the throttle area;
the inner wall of the throttle valve shell is provided with a throttle starting point in close fit with the valve plate and a throttle end point when the valve plate is completely opened, and the inner wall of the throttle valve shell is also provided with a throttle curved surface which is in arc transition from the throttle starting point to the throttle end point.
2. the throttling valve of claim 1, wherein the valve plate comprises a first throttling position and a second throttling position, wherein the first throttling position is vertically arranged and is located at the starting point of throttling and the second throttling position is located at the end point of throttling.
3. The throttling valve of claim 2, wherein the valve plate forms a throttle opening angle θ with the first throttle position when throttling rotationally; the throttling distance d between the end part of the valve plate and the throttling curved surface is in a linear and direct proportional relation with the throttling opening angle theta.
4. The throttling valve of claim 3, wherein the throttling area comprises a closing radius R of the valve plate closing and a throttling radius R of the valve plate opening to a throttling position, the throttling distance d is the difference between the closing radius R and the throttling radius R, and the scaling factor of the throttling distance and the throttling opening angle is R/(150-200).
5. The choke valve according to claim 4, characterized in that the proportionality factor between the choke pitch and the choke opening angle is R/180.
6. The throttling valve according to claim 3, wherein the valve plate and the throttling curved surface define a throttling flow area during throttling rotation, and the flow area S of the throttling flow area is in a linear and direct proportional relation with the throttling opening angle.
7. the throttling valve of claim 1, wherein a differential pressure sensor is further provided on the throttling valve housing for monitoring a difference in flow rates between the valve body inlet and the valve body outlet.
8. The throttling valve of claim 7, wherein a first pressure sensor for monitoring the flow pressure at the valve body inlet and a second pressure sensor for monitoring the flow pressure at the valve body outlet are provided on the throttling valve housing, respectively.
9. An engine provided with a throttle valve that adjusts an intake air amount, characterized in that the throttle valve is the throttle valve according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711046230.1A CN107642418B (en) | 2017-10-31 | 2017-10-31 | Throttle valve and engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046230.1A CN107642418B (en) | 2017-10-31 | 2017-10-31 | Throttle valve and engine |
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| Publication Number | Publication Date |
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| CN107642418A CN107642418A (en) | 2018-01-30 |
| CN107642418B true CN107642418B (en) | 2019-12-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019084763A1 (en) * | 2017-10-31 | 2019-05-09 | 潍柴动力股份有限公司 | Throttle valve and engine |
| US11174799B2 (en) * | 2018-03-05 | 2021-11-16 | Vitesco Technologies USA, LLC | Integrated VDA housing with anti-rotation feature |
| CN109268150B (en) * | 2018-09-18 | 2021-08-20 | 潍柴动力股份有限公司 | Engine air intake and exhaust system and control valve thereof |
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| JPH09195803A (en) * | 1996-01-16 | 1997-07-29 | Nissan Motor Co Ltd | Throttle valve device of internal combustion engine |
| JP2000110951A (en) * | 1998-10-05 | 2000-04-18 | Jidosha Kiki Co Ltd | Butterfly valve |
| JP2001020814A (en) * | 1999-07-06 | 2001-01-23 | Aisan Ind Co Ltd | Throttle body |
| US6352241B1 (en) * | 1998-11-26 | 2002-03-05 | Mannesmann Vdo Ag | Butterfly valve body |
| US6698717B1 (en) * | 2002-10-24 | 2004-03-02 | Honeywell International Inc. | Modified butterfly valve and assembly |
| CN106481427A (en) * | 2015-08-24 | 2017-03-08 | 马自达汽车株式会社 | The exhaust apparatus of electromotor |
| CN207554200U (en) * | 2017-10-31 | 2018-06-29 | 潍柴动力股份有限公司 | Throttle valve and engine |
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2017
- 2017-10-31 CN CN201711046230.1A patent/CN107642418B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09195803A (en) * | 1996-01-16 | 1997-07-29 | Nissan Motor Co Ltd | Throttle valve device of internal combustion engine |
| JP2000110951A (en) * | 1998-10-05 | 2000-04-18 | Jidosha Kiki Co Ltd | Butterfly valve |
| US6352241B1 (en) * | 1998-11-26 | 2002-03-05 | Mannesmann Vdo Ag | Butterfly valve body |
| JP2001020814A (en) * | 1999-07-06 | 2001-01-23 | Aisan Ind Co Ltd | Throttle body |
| US6698717B1 (en) * | 2002-10-24 | 2004-03-02 | Honeywell International Inc. | Modified butterfly valve and assembly |
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