CN215595757U - Exhaust gas recirculation device, engine and vehicle - Google Patents
Exhaust gas recirculation device, engine and vehicle Download PDFInfo
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- CN215595757U CN215595757U CN202121237574.2U CN202121237574U CN215595757U CN 215595757 U CN215595757 U CN 215595757U CN 202121237574 U CN202121237574 U CN 202121237574U CN 215595757 U CN215595757 U CN 215595757U
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Abstract
The utility model relates to the technology of engine exhaust gas treatment, and discloses an exhaust gas recirculation device which comprises an EGR valve, a throttle valve, a first rotating shaft, a second rotating shaft, a driving mechanism and a transmission mechanism. The device can realize that only one set of driving mechanism is used through the matched motion between the intermediate shaft, the first transmission wheel, the second transmission wheel, the first elastic element, the second elastic element, the third elastic element, the first transmission unit, the second transmission unit and the third transmission unit in the transmission mechanism, and can carry out relatively independent control on the EGR valve and the throttle valve in the combination valve, thereby improving the EGR rate control accuracy of the engine, avoiding aggravating the flow loss of an air inlet system of the engine, and reducing the control difficulty and the manufacturing cost.
Description
Technical Field
The utility model relates to the technology of engine exhaust gas treatment, in particular to an exhaust gas recirculation device, an engine and a vehicle.
Background
Fuel economy and Exhaust pollution levels are important characteristics of automobiles, and many vehicles have adopted engine EGR (Exhaust Gas recirculation, which is the name given in chinese) technology, so as to achieve the effects of improving fuel economy and reducing Exhaust pollution levels. The engine EGR technology is a technology in which exhaust gas in an exhaust pipe of an engine is introduced into intake air, mixed with fresh air in the intake air, and introduced into a cylinder.
In the combustion process in the cylinder, the main component CO in the waste gas is utilized2The specific heat capacity of the engine is high, so that the in-cylinder temperature is reduced, the engine knocking is inhibited, the pollutant emission of the engine is reduced, and finally the fuel economy of the engine is improved and the pollutant emission of the engine is reduced. The EGR gas is mixed with intake air after passing through the EGR valve, and this process increases the driving pressure difference by increasing the opening degree of the EGR valve, thereby increasing the EGR rate of the engine. However, during the introduction of the low-pressure EGR gas, there may occur a case where the engine EGR rate is lower than a specified target due to too small EGR driving pressure difference, and at this time, the engine EGR rate cannot be increased even if the EGR valve is fully opened.
In order to solve the above problems, the prior art is to add a throttle valve at a position before (upstream) mixing fresh air and EGR gas in an intake passage on the basis of providing an EGR valve, and the pressure of air passing through the throttle valve can be correspondingly reduced by reducing the throttle valve by a certain opening degree, so as to increase the driving pressure difference of EGR. The EGR valve and the throttle valve are respectively driven and controlled by two sets of driving and controlling mechanisms, and the driving pressure difference is increased by only increasing the opening degree of the EGR valve, only reducing the opening degree of the throttle valve or reducing the opening degree of the throttle valve while increasing the opening degree of the EGR valve, so that the EGR rate of the engine is improved. This solution requires the installation of two valves, and requires two sets of mechanisms for driving and controlling the valves, thus causing the problems of complex structure and high manufacturing cost.
Currently, there is also an exhaust gas recirculation device that integrates the EGR valve and throttle valve functions into one combined valve, halving the drive and control structure. The specific idea is as follows: the throttle baffle of the throttle valve is mechanically connected with the valve head of the EGR valve, only one set of driving and controlling structure is used for driving the combined valve, the opening of the throttle valve is correspondingly reduced by increasing the certain opening of the EGR valve, the driving pressure difference of the EGR is increased, and the EGR rate of the engine is improved. Although the scheme saves the cost, the two valves cannot be independently controlled, the opening degree of the throttle valve is inevitably reduced along with the increase of the opening degree of the EGR valve, the flow resistance of air flowing through the throttle valve is increased, the mechanical energy loss of the air flowing through the throttle valve is increased, the flow loss of an air inlet system of the engine is increased, and the working efficiency of the engine is reduced.
SUMMERY OF THE UTILITY MODEL
Based on the problems in the prior art, the present invention is directed to an exhaust gas recirculation device, an engine and a vehicle, so as to achieve relatively independent control of an EGR valve and a throttle valve in a combination valve by only one set of driving control mechanism, thereby reducing manufacturing cost and avoiding aggravation of flow loss of an engine intake system while increasing an EGR rate of the engine.
In order to achieve the above object, the present invention provides an exhaust gas recirculation device including:
the EGR valve comprises a first valve body and a first valve plate arranged in the first valve body;
the throttle valve comprises a second valve body and a second valve plate arranged in the second valve body;
the first end of the first rotating shaft is inserted into the first valve body and fixedly connected with the first valve plate, and the second end of the first rotating shaft is arranged outside the first valve body;
the first end of the second rotating shaft is inserted in the second valve body and fixedly connected with the second valve sheet, and the second end of the second rotating shaft is arranged outside the second valve body;
a drive mechanism; and
the transmission mechanism comprises an intermediate shaft, a first transmission wheel, a second transmission wheel, a first elastic element, a second elastic element, a third elastic element, a first transmission unit, a second transmission unit and a third transmission unit;
the driving mechanism is in transmission connection with the first driving wheel through a first transmission unit so as to drive the first driving wheel to rotate; the first transmission wheel is in transmission connection with the second transmission unit, the second transmission unit is fixedly connected with the second end of the first rotating shaft, the second transmission wheel is in transmission connection with the third transmission unit, and the third transmission unit is fixedly connected with the second end of the second rotating shaft; one end of the first elastic element is fixedly connected with the second transmission unit, and the other end of the first elastic element is fixed on the first valve body; two ends of the second elastic element are respectively and fixedly connected to the first driving wheel and the second driving wheel; one end of the third elastic element is fixedly connected with the third transmission unit, and the other end of the third elastic element is fixed on the second valve body.
In some embodiments of the utility model, the first valve body and the second valve body are integrally formed.
In some embodiments of the present invention, the first elastic element is a first torsion spring, the second elastic element is a second torsion spring, and the third elastic element is a third torsion spring; one end of the first torsion spring is fixedly connected with the second transmission unit, and the other end of the first torsion spring is fixed on the first valve body; two ends of the second torsion spring are respectively and fixedly connected to the first driving wheel and the second driving wheel; one end of the third torsion spring is fixedly connected with the third transmission unit, and the other end of the third torsion spring is fixed on the second valve body.
In some embodiments of the present invention, the first rotating shaft passes through the first torsion spring, the intermediate shaft passes through the second torsion spring, and the second rotating shaft passes through the third torsion spring.
In some embodiments of the present invention, the first transmission unit includes a third transmission wheel, the output shaft of the driving mechanism is fixedly connected in a central hole of the third transmission wheel, the second transmission unit includes a fourth transmission wheel, the second end of the first rotating shaft is fixedly connected in a central hole of the fourth transmission wheel, the third transmission unit includes a fifth transmission wheel, and the second end of the second rotating shaft is fixedly connected in a central hole of the fifth transmission wheel.
In some embodiments of the present invention, the first driving wheel, the second driving wheel, the third driving wheel, the fourth driving wheel and the fifth driving wheel are all gears, the third driving wheel is meshed with the first driving wheel, the first driving wheel is meshed with the fourth driving wheel, and the second driving wheel is meshed with the fifth driving wheel.
In some embodiments of the present invention, the first rotating shaft is provided with a first radial through hole, the first valve plate penetrates through the first radial through hole and is fixed on the first rotating shaft, the second rotating shaft is provided with a second radial through hole, and the second valve plate penetrates through the second radial through hole and is fixed on the second rotating shaft.
In some embodiments of the utility model, the drive mechanism is a motor.
To achieve the same object, the present invention also provides an engine including the above-described exhaust gas recirculation device.
In order to achieve the same object, the utility model also provides a vehicle including the engine.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that:
the exhaust gas recirculation device comprises an EGR valve, a throttle valve, a first rotating shaft, a second rotating shaft, a driving mechanism and a transmission mechanism, wherein the first end of the first rotating shaft is inserted into the first valve body and fixedly connected with a first valve plate of the EGR valve;
under some working conditions that the target EGR rate of the engine is low, the first transmission unit correspondingly moves under the driving of the driving mechanism, the first transmission unit drives the first transmission wheel to rotate by a corresponding angle, the second transmission unit correspondingly moves under the driving of the first transmission wheel, and the second transmission unit overcomes the pre-tightening torque of the first elastic element to drive the first rotation shaft to rotate by a corresponding angle, so that the opening degree of the first valve plate is correspondingly increased, the exhaust pressure is increased, the driving pressure difference is further increased, and the EGR rate of the engine is improved; at this time, the torque of the second elastic element is smaller, so that the second transmission wheel is insufficient to overcome the pre-tightening torque of the third elastic element to drive the third transmission unit and the second rotating shaft to move, the opening degree of the second valve sheet is unchanged, and the initial fully-opened state is maintained.
Under the working condition that the target EGR rate of the engine is high, the first transmission unit correspondingly moves under the driving of the driving mechanism, the first transmission unit drives the first transmission wheel to rotate by a corresponding angle, the second transmission unit correspondingly moves under the driving of the first transmission wheel, the second transmission unit overcomes the pre-tightening torque of the first elastic element and drives the first rotating shaft to rotate by a corresponding angle, so that the opening degree of the first valve plate is correspondingly increased, at the moment, the opening degree of the first valve plate is large, and the opening degree of the first valve plate is continuously increased, so that the EGR rate of the engine cannot be increased; at the moment, the torque of the second elastic element is large enough to enable the second transmission wheel to overcome the pre-tightening torque of the third elastic element, so that the third transmission unit is driven to correspondingly move, the second rotating shaft is driven to correspondingly rotate, the opening degree of the second valve sheet is correspondingly reduced, the pressure of air inlet is reduced, the driving pressure difference is increased, and the EGR rate of the engine is improved.
Therefore, the exhaust gas recirculation device can realize that the EGR valve and the throttle valve in the combined valve can be controlled relatively independently by only one set of driving mechanism, the EGR rate control accuracy of the engine is improved, the aggravation of the flow loss of an engine air inlet system is avoided, and the control difficulty and the manufacturing cost of the engine are reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of an exhaust gas recirculation apparatus according to an embodiment of the present invention.
Description of reference numerals:
1. an EGR valve; 11. a first valve body; 12. a first valve plate; 2. a throttle valve; 21. a second valve body; 22. a second valve plate; 31. a first rotating shaft; 32. a second rotating shaft; 33. a drive mechanism; 4. a transmission mechanism; 41. an intermediate shaft; 42. a first drive pulley; 43. a second transmission wheel; 44. a first elastic element; 45. a second elastic element; 46. a third elastic element; 47. a first transmission unit; 471. a third drive wheel 471; 48. a second transmission unit; 481. a fourth transmission wheel; 49. a third transmission unit; 491. a fifth transmission wheel; 5. an air intake passage; 6. an exhaust gas passage.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the terms "first," "second," etc. are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The operating principle of an engine low pressure Exhaust Gas Recirculation (EGR) system is generally: waste gas generated after combustion in an engine cylinder enters a turbine of the turbocharger through an exhaust manifold to provide power for driving the turbocharger; the exhaust gas then flows into an exhaust pipe, or into an EGR circuit. In the low-pressure EGR circuit, the exhaust gases flow through a low-pressure EGR cooler, during which the temperature decreases, whereafter the exhaust gases pass through an EGR valve. Ambient fresh air is drawn into the engine intake line, first through an air cleaner, then through a throttle valve, and then mixes with exhaust gas flowing through an EGR valve in the intake line. The mixture of air and exhaust gas is drawn into the turbocharger compressor during which the mixture is compressed, after which the high pressure, high temperature mixture is passed through an intercooler during which the temperature is reduced, after which the high pressure, low temperature mixture is passed into the engine intake manifold. (ii) a And finally, the high-pressure low-temperature mixed gas enters an engine cylinder, is mixed with fuel oil to participate in combustion and do work, and then is changed into waste gas. The reason that exhaust gas can flow in the EGR system is that the pressure in the exhaust pipe is higher than the pressure in the intake pipe after the throttle valve, and the exhaust gas flows through the EGR system under the driving of the pressure difference.
Under some working conditions of the engine, the EGR driving pressure difference is large enough, the target EGR rate can be realized by adjusting the opening degree of the EGR valve, and the throttle valve is kept fully opened at the moment. However, at other operating points the EGR driven pressure differential is insufficient, resulting in failure to achieve the target EGR rate even with full EGR opening, for which reason the throttle valve may be closed at an angle to reduce the air pressure downstream of the throttle valve so that an increase in EGR driven pressure differential achieves the target EGR rate.
Accordingly, an embodiment of the present invention provides an improved exhaust gas recirculation apparatus, which is shown in fig. 1 and includes an EGR valve 1, a throttle valve 2, a first rotating shaft 31, a second rotating shaft 32, a transmission mechanism 4, and a set of driving mechanisms 33.
The EGR valve 1 comprises a first valve body 11 and a first valve plate 12 arranged in the first valve body 11; the throttle valve 2 comprises a second valve body 21 and a second valve sheet 22 arranged inside the second valve body 21; the first rotating shaft 31 has a first end and a second end which are oppositely arranged, the first end is inserted into the first valve body 11 and is fixedly connected with the first valve plate 12, and the second end is arranged outside the first valve body 11; the second rotating shaft 32 has a first end and a second end opposite to each other, the first end is inserted into the second valve body 21 and is fixedly connected to the second valve plate 22, and the second end is disposed outside the second valve body 21.
Specifically, the transmission mechanism 4 of the present embodiment includes an intermediate shaft 41, a first transmission wheel 42, a second transmission wheel 43, a first elastic element 44, a second elastic element 45, a third elastic element 46, a first transmission unit 47, a second transmission unit 48, and a third transmission unit 49; the first transmission wheel 42 and the second transmission wheel 43 are coaxially arranged, the intermediate shaft 41 is fixed, and the intermediate shaft 41 penetrates through the first transmission wheel 42 and the second transmission wheel 43 in a clearance fit mode, so that the first transmission wheel 42 and the second transmission wheel 43 cannot rotate simultaneously under the condition of not being affected by other components.
Specifically, the driving mechanism 33 of the present embodiment is in transmission connection with the first transmission wheel 42 through the first transmission unit 47, and the driving mechanism 33 drives the first transmission wheel 42 to rotate through the first transmission unit 47; the first transmission wheel 42 is in transmission connection with the second transmission unit 48, so that the first transmission wheel 42 can drive the second transmission unit 48 to rotate, and the second transmission unit 48 is fixedly connected with the first rotating shaft 31, so as to drive the first rotating shaft 31 to rotate. The second transmission wheel 43 is in transmission connection with a third transmission unit 49, and the third transmission unit 49 is fixedly connected with the second rotating shaft 32, so that the second rotating shaft 32 is driven to rotate by the rotation of the second transmission wheel 43.
Specifically, one end of the first elastic element 44 of the present embodiment is fixedly connected to the second transmission unit 48, and the other end thereof is fixed to the first valve body 11, so that an elastic torsion force is formed between the first rotating shaft 31 and the second transmission unit 48; two ends of the second elastic element 45 are respectively and fixedly connected to the first transmission wheel 42 and the second transmission wheel 43, so that the first transmission wheel 42 and the second transmission wheel 43 are connected and form elastic torsion force; one end of the third elastic element 46 is fixedly connected with the third transmission unit 49, and the other end thereof is fixed on the second valve body 21, so that an elastic torsion force is formed between the second rotating shaft 32 and the third transmission unit 49.
The exhaust gas recirculation device of the present embodiment achieves relatively independent control of the EGR valve and the throttle valve in the combination valve by the driving engagement between the first transmission wheel 42, the second transmission wheel 43, the first transmission unit 47, the second transmission unit 48, and the third transmission unit 49, and the rigidity engagement and the preload moment engagement between the first elastic element 44, the second elastic element 45, and the third elastic element 46.
Specifically, under some working conditions that the target engine EGR rate is low, the driving mechanism 33 drives the first transmission wheel 42 to rotate by a corresponding angle through the first transmission unit 47, the second transmission unit 48 correspondingly moves under the driving of the first transmission wheel 42, and the second transmission unit 48 overcomes the pre-tightening torque of the first elastic element 44 to drive the first rotating shaft 31 to rotate by a corresponding angle, so that the opening degree of the first valve plate 12 is correspondingly increased, the exhaust pressure is increased, the driving pressure difference is increased, and the engine EGR rate is increased; at this time, the torque of the second elastic element 45 is small, which is not enough to make the second transmission wheel 43 overcome the pre-tightening torque of the third elastic element 46 to drive the third transmission unit 49 and the second rotation shaft 32 to move, and the opening degree of the second valve sheet 22 is unchanged, so as to maintain the initial fully opened state.
Under the working condition that the target EGR rate of the engine is high, the first transmission unit 47 correspondingly moves under the driving of the driving mechanism 33, the first transmission unit 47 drives the first transmission wheel 42 to rotate by a corresponding angle, the second transmission unit 48 correspondingly moves under the driving of the first transmission wheel 42, the second transmission unit 48 overcomes the pre-tightening torque of the first elastic element 44 and drives the first rotating shaft 31 to rotate by a corresponding angle, so that the opening degree of the first valve plate 12 is correspondingly increased, at the moment, the opening degree of the first valve plate 12 is large, and the opening degree cannot be increased by continuously increasing the EGR rate of the engine; at this time, the torque of the second elastic element 45 is large enough to make the second transmission wheel 43 overcome the pre-tightening torque of the third elastic element 46, so as to drive the third transmission unit 49 to move correspondingly, and further drive the second rotating shaft 32 to rotate correspondingly, so that the opening degree of the second valve plate 22 is correspondingly reduced, and thus the pressure of the intake air is reduced, and further the driving pressure difference is increased, and the engine EGR rate is improved.
Based on the scheme, the EGR valve and the throttle valve in the combined valve can be controlled relatively independently by only one set of driving mechanism, the EGR rate control accuracy of the engine is improved, meanwhile, the aggravation of the flow loss of an engine air inlet system is avoided, and the control difficulty and the manufacturing cost of the engine are reduced.
In this embodiment, the first valve body 11 and the second valve body 21 are preferably integrally formed to form a combined valve body. The manufacturing mode of integral molding reduces the assembly steps and improves the manufacturing efficiency. It should be noted that the first valve body 11 and the second valve body 21 may be manufactured in other manners and assembled.
In this embodiment, an air inlet channel 5 is arranged in the first valve body 11, and after entering the engine, the outside air is introduced into the air inlet channel 5 and then flows through the throttle valve 2; an exhaust gas passage 6 is provided in the second valve body 21, and exhaust gas discharged from the engine is introduced into the exhaust gas passage 6 and then flows through the EGR valve 1.
In this embodiment, the first elastic element 44 is a first torsion spring, the second elastic element 45 is a second torsion spring, and the third elastic element 46 is a third torsion spring. The torsional spring can realize torque transmission and storage, has wide application, simple structure and reliable performance, can normally realize the function of the exhaust gas recirculation device in the embodiment by using the torsional spring, is convenient to assemble and can improve the reliability of the device. The elastic element may be another elastic element that can transmit and store torque.
In order to better limit and fix the elastic element and ensure the normal operation of the elastic element, the first rotating shaft 31 passes through the first torsion spring, one end of the first torsion spring is fixedly connected with the second transmission unit 48, and the other end of the first torsion spring is fixed on the first valve body 11; the intermediate shaft 41 passes through the second torsion spring, and two ends of the second torsion spring are respectively and fixedly connected to the first transmission wheel 42 and the second transmission wheel 43; the second rotating shaft 32 passes through the third torsion spring, one end of the third torsion spring is fixedly connected with the third transmission unit 49, and the other end is fixed on the second valve body 22. It should be noted that the elastic element may be limited and fixed in other manners.
In this embodiment, the first transmission unit 47 includes a third transmission wheel 471, an output shaft of the driving mechanism 33 passes through a central hole of the third transmission wheel 471 and is fixedly connected to the third transmission wheel 471, the second transmission unit 48 includes a fourth transmission wheel 481, the first rotation shaft 31 passes through a central hole of the fourth transmission wheel 481 and is fixedly connected to the fourth transmission wheel 481, the third transmission unit 49 includes a fifth transmission wheel 491, and the second rotation shaft 32 passes through a central hole of the fifth transmission wheel 491 and is fixedly connected to the fifth transmission wheel 491. Therefore, the rotation of the first rotating shaft 31 and the second rotating shaft 32 can be controlled by controlling the rotation of the first driving wheel, the second driving wheel, the third driving wheel, the fourth driving wheel and the fifth driving wheel, and the movement of a valve plate fixedly connected with the first rotating shaft 31 and the second rotating shaft 32 is further controlled, so that the EGR valve and the throttle valve are controlled independently. It should be noted that the first transmission unit 47, the second transmission unit 48 and the third transmission unit 49 may also include other transmission wheels to form a transmission train.
In order to make the transmission reliable and make the device have better adjustability, the first transmission wheel 42, the second transmission wheel 43, the third transmission wheel 471, the fourth transmission wheel 481 and the fifth transmission wheel 491 are all gears. It should be noted that the first transmission wheel 42, the second transmission wheel 43, the third transmission wheel 471, the fourth transmission wheel 481 and the fifth transmission wheel 491 can also be other transmission wheels meeting the transmission requirement, such as a belt pulley or a chain wheel.
In this embodiment, the third transmission wheel 471 is engaged with the first transmission wheel 42, the first transmission wheel 42 is engaged with the fourth transmission wheel 481, and the second transmission wheel 43 is engaged with the fifth transmission wheel 491, so that the movement of the first valve plate 12 is associated with the movement of the second valve plate 22, and when the opening of the first valve plate 12 is increased to a certain degree, the opening of the second valve plate 22 is reduced, thereby improving the EGR rate of the engine. It should be noted that: a transition gear can also be added between the third driving wheel 471 and the first driving wheel 42; a transition gear can also be added between the first transmission wheel 42 and the fourth transmission wheel 481; a transition gear can also be added between the second driving wheel 43 and the fifth driving wheel 491.
In order to make the fixed connection between the first valve plate 12 and the first rotating shaft 31 simple and reliable, a first radial through hole is formed in the first rotating shaft 31, and the first valve plate 12 penetrates through the first radial through hole and is fixed on the first rotating shaft 31. In order to make the fixed connection between the second valve plate 22 and the second shaft 32 simple and reliable, a second radial through hole is opened on the second shaft 32, and the second valve plate 22 is fixed on the second shaft 32 by penetrating through the second radial through hole.
It should be noted that, the fixed connection between the first valve plate 12 and the first rotating shaft 31 and the fixed connection between the second valve plate 22 and the second rotating shaft 32 may also adopt other fixed connection modes that can achieve the fixed connection effect.
In this embodiment, the driving mechanism 33 is an electric motor in order to facilitate control of the operation of the exhaust gas recirculation apparatus in this embodiment. The driving mechanism 33 may be another driving mechanism capable of achieving a driving effect.
The exhaust gas recirculation device provided by the utility model can realize that when the opening degree of the first valve plate 12 does not exceed a certain limit, the EGR rate of the engine is increased only by increasing the opening degree of the first valve plate 12, and at the moment, the opening degree of the second valve plate 22 is unchanged; when the opening degree of first vane 12 exceeds a certain limit, the engine EGR rate is increased by increasing the opening degree of first vane 12 and decreasing the opening degree of second vane 22. Therefore, the EGR valve and the throttle valve in the combined valve are controlled relatively independently by only one set of driving and controlling mechanism, the EGR rate control accuracy of the engine is improved, meanwhile, the aggravation of the flow loss of an engine air inlet system is avoided, and the control difficulty and the manufacturing cost of the engine are reduced.
The embodiment of the utility model also provides an engine which comprises the exhaust gas recirculation device, so that the engine can realize relatively independent control on the EGR valve and the throttle valve in the combined valve by only one set of driving and control mechanism due to the arrangement of the exhaust gas recirculation device, improve the control accuracy of the EGR rate of the engine, avoid aggravation of flow loss of an air inlet system of the engine and reduce the control difficulty and the manufacturing cost of the engine.
The embodiment of the utility model also provides an automobile which comprises the engine, so that the automobile can realize the relatively independent control of the EGR valve and the throttle valve in the combined valve by only using one set of driving mechanism due to the arrangement of the engine, the EGR rate control accuracy of the engine is improved, the aggravation of the flow loss of an air inlet system of the engine is avoided, the control difficulty and the manufacturing cost of the whole automobile are reduced, and the emission of pollutants is reduced.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An exhaust gas recirculation apparatus, comprising:
the EGR valve comprises a first valve body and a first valve plate arranged in the first valve body;
the throttle valve comprises a second valve body and a second valve plate arranged in the second valve body;
the first end of the first rotating shaft is inserted into the first valve body and fixedly connected with the first valve plate, and the second end of the first rotating shaft is arranged outside the first valve body;
the first end of the second rotating shaft is inserted in the second valve body and fixedly connected with the second valve sheet, and the second end of the second rotating shaft is arranged outside the second valve body;
a drive mechanism; and
the transmission mechanism comprises an intermediate shaft, a first transmission wheel, a second transmission wheel, a first elastic element, a second elastic element, a third elastic element, a first transmission unit, a second transmission unit and a third transmission unit;
the driving mechanism is in transmission connection with the first driving wheel through a first transmission unit so as to drive the first driving wheel to rotate; the first transmission wheel is in transmission connection with the second transmission unit, the second transmission unit is fixedly connected with the second end of the first rotating shaft, the second transmission wheel is in transmission connection with the third transmission unit, and the third transmission unit is fixedly connected with the second end of the second rotating shaft; one end of the first elastic element is fixedly connected with the second transmission unit, and the other end of the first elastic element is fixed on the first valve body; two ends of the second elastic element are respectively and fixedly connected to the first driving wheel and the second driving wheel; one end of the third elastic element is fixedly connected with the third transmission unit, and the other end of the third elastic element is fixed on the second valve body.
2. The exhaust gas recirculation device of claim 1, wherein the first valve body and the second valve body are integrally formed.
3. The exhaust gas recirculation device according to claim 1 or 2, wherein the first elastic element is a first torsion spring, the second elastic element is a second torsion spring, and the third elastic element is a third torsion spring; one end of the first torsion spring is fixedly connected with the second transmission unit, and the other end of the first torsion spring is fixed on the first valve body; two ends of the second torsion spring are respectively and fixedly connected to the first driving wheel and the second driving wheel; one end of the third torsion spring is fixedly connected with the third transmission unit, and the other end of the third torsion spring is fixed on the second valve body.
4. The exhaust gas recirculation device according to claim 3, wherein the first rotating shaft passes through the first torsion spring, the intermediate shaft passes through the second torsion spring, and the second rotating shaft passes through the third torsion spring.
5. An exhaust gas recirculation arrangement according to claim 1 or 2, wherein the first transmission unit comprises a third transmission wheel, the output shaft of the drive mechanism being fixedly connected within a central bore of the third transmission wheel;
the second transmission unit comprises a fourth transmission wheel, and the second end of the first rotating shaft is fixedly connected in a central hole of the fourth transmission wheel;
the third transmission unit comprises a fifth transmission wheel, and the second end of the second rotating shaft is fixedly connected in a central hole of the fifth transmission wheel.
6. The exhaust gas recirculation device of claim 5, wherein the first drive wheel, the second drive wheel, the third drive wheel, the fourth drive wheel, and the fifth drive wheel are gears, the third drive wheel is engaged with the first drive wheel, the first drive wheel is engaged with the fourth drive wheel, and the second drive wheel is engaged with the fifth drive wheel.
7. The exhaust gas recirculation device according to claim 1 or 2, wherein the first shaft has a first radial through hole, the first valve plate passes through the first radial through hole and is fixed to the first shaft, the second shaft has a second radial through hole, and the second valve plate passes through the second radial through hole and is fixed to the second shaft.
8. An exhaust gas recirculation device according to claim 1 or 2, characterized in that the drive mechanism is an electric motor.
9. An engine comprising an exhaust gas recirculation arrangement according to any of claims 1-8.
10. A vehicle characterized by comprising the engine of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121237574.2U CN215595757U (en) | 2021-06-03 | 2021-06-03 | Exhaust gas recirculation device, engine and vehicle |
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| CN202121237574.2U CN215595757U (en) | 2021-06-03 | 2021-06-03 | Exhaust gas recirculation device, engine and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607535A (en) * | 2022-02-23 | 2022-06-10 | 浙江吉利控股集团有限公司 | Pressure booster |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607535A (en) * | 2022-02-23 | 2022-06-10 | 浙江吉利控股集团有限公司 | Pressure booster |
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