WO2022127246A1

WO2022127246A1 - Electronic throttle and vehicle

Info

Publication number: WO2022127246A1
Application number: PCT/CN2021/119330
Authority: WO
Inventors: Banghua YAN; Franck Tony KONG; Furen LIU; Laurent CHIRON; Thierry Lanoe; Sylvain Gautier
Original assignee: Wuxi Valeo Automotive Components & Systems Co., Ltd.
Priority date: 2020-12-18
Filing date: 2021-09-18
Publication date: 2022-06-23
Also published as: CN214247509U

Abstract

The present disclosure relates to an electronic throttle and a vehicle including the electronic throttle. The electronic throttle includes a metal body in which a gas channel is arranged. The electronic throttle includes the following arranged in the metal body: an electric motor; a gear assembly rotatable under a drive of the electric motor; a valve shaft rotatable under a drive of the gear assembly; and a valve plate arranged on the valve shaft and rotatable between an opening position and a closed position. The electronic throttle includes a cover, the cover is mounted on the metal body and forms a sealed chamber together with the metal body, and an electrical component is arranged in the sealed chamber. The electronic throttle is provided with a cooling pipe at a position corresponding to the cover, for at least cooling the cover.

Description

ELECTRONIC THROTTLE AND VEHICLE

TECHNICAL FIELD

The present disclosure relates to an electronic throttle, and relates to a vehicle including such electronic throttle.

BACKGROUND

Electronic throttle is used for adjusting an intake flow of a vehicle engine, and the controlling effect of the electronic throttle directly affects the combustion performance of fuels, as well as the dynamic performance and the comfort of the vehicle. Therefore, the electronic throttle is an important part of the vehicle.

In some existing vehicles, the electronic throttle directly faces a turbocharger, and the gas output by the turbocharger is directly delivered to the electronic throttle without cooling. In such case, the temperature of the gas entering the electronic throttle is extremely high. In some other vehicles with compact engines, high-temperature heat sources in the engine, such as a gasoline particulate filter (GPF) on an exhaust side of the engine, are disposed adjacent to the electronic throttle. The environmental temperature of the electronic throttle would be very high due to the heat radiation of the high-temperature heat sources disposed adjacent thereto.

At present, the commonly used electronic throttle has no dedicated cooling system. In order to prevent temperature-sensitive electrical components (such as sensors) in the electronic throttle from being affected by the relatively higher environmental temperature and intake temperature, the electronic throttle usually uses plastic cover plates with poor thermal conductivity for mounting the electrical components. Generally, electrical components such as sensors are mounted on a plastic cover plate, and lead wires are directly pre-embedded in the plastic cover plate. However, the maximum long-term temperature that the plastic cover plate can withstand is 140°, which results in that the long-term environmental temperature that the electronic throttle can withstand is not allowed to exceed 140°. Moreover, a valve plate of the electronic throttle may expand at a high temperature, and hence is easy to get stuck, which would seriously affect the performance of the vehicle and even causes serious accidents.

In some other electronic throttles, a cooling system is mounted on the electronic throttle to cool a guide bearing of a valve shaft of the electronic throttle, so as to prevent the electronic throttle from being affected by the intake air with high temperature. However, these electronic throttles fail to consider the influence of environmental temperature, and also fail to solve the problem that the valve plate may be stuck.

Generally, for the above-mentioned electronic throttle, the maximum long-term environmental temperature that it can withstand is 140°, and the maximum long-term intake temperature that it can withstand is 140°. However, with the continuous pursuit for compact engines and higher air inflow, the environmental temperature and intake temperature of the electronic throttle are increasingly raised, and the risk for the valve plate to get stuck caused by high temperature is also increasingly raised. Obviously, the electronic throttle that can withstand the above-mentioned temperature can no longer satisfy the requirements.

Therefore, it has become an urgent problem to be solved in this field to provide an electronic throttle, which can withstand higher environmental temperature and intake temperature, and prevent the valve plate from stuck.

SUMMARY

Therefore, the purpose of the present disclosure is to provide an electronic throttle and a vehicle including the electronic throttle, which can not only withstand higher environmental temperature and intake temperature to have longer service life, but also prevent the valve plate from stuck.

The present disclosure relates to an electronic throttle, including:

a metal body, in which a gas channel is arranged;

an electric motor, arranged in the metal body;

a gear assembly, arranged in the metal body and rotatable under a drive of the electric motor;

a valve shaft, arranged in the metal body and rotatable under a drive of the gear assembly;

a valve plate, arranged in the metal body and on the valve shaft, and rotatable between an opening position and a closed position, and

a cover, the cover being mounted on the metal body and forming a sealed chamber together with the metal body, and an electrical component being arranged in the sealed chamber, wherein

the electronic throttle is provided with a cooling pipe at a position corresponding to the cover, and the cooling pipe is configured to at least cool the cover.

According to an embodiment of the present disclosure, the cooling pipe is arranged on the metal body, and the cover is made of a metal and has a heat-conducting surface in contact with the metal body.

According to an embodiment of the present disclosure, the cover is made of an aluminum alloy.

According to an embodiment of the present disclosure, the electronic throttle further includes a bearing, which is arranged in the metal body and configured to support the valve shaft.

According to an embodiment of the present disclosure, the cooling pipe is arranged at a position corresponding to at least two of the electric motor, the gear assembly and the bearing.

According to an embodiment of the present disclosure, the cooling pipe has a Z shape or an L shape.

According to an embodiment of the present disclosure, the cover includes a plastic frame mounted on an inner surface of the cover, and the electrical component is mounted on the plastic frame.

According to an embodiment of the present disclosure, the cover is further provided with a plastic adapter, and the plastic adapter has an interface for an external connector.

According to an embodiment of the present disclosure, the plastic adapter is connected to the plastic frame.

According to an embodiment of the present disclosure, the plastic adapter has a contact piece located in the sealed chamber, and a wiring harness of the external connector extends into the sealed chamber and is connected with the contact piece.

According to an embodiment of the present disclosure, the wiring harness extends into the sealed chamber by passing through a mounting hole of the plastic adapter.

According to an embodiment of the present disclosure, a sealing ring is arranged in the mounting hole.

According to an embodiment of the present disclosure, the interface is filled with a sealing resin.

According to an embodiment of the present disclosure, the valve plate is made of a material having a thermal expansion coefficient lower than that of the metal body.

According to an embodiment of the present disclosure, the valve plate is made of a stainless steel.

According to an embodiment of the present disclosure, the cover includes a plastic body, and a metal heat-conducting part is provided on the plastic body.

According to an embodiment of the present disclosure, the cooling pipe is in thermal communication with the metal heat-conducting part.

According to an embodiment of the present disclosure, the metal heat-conducting part is a metal sheet and is arranged on an outer surface of the plastic body.

According to an embodiment of the present disclosure, the metal heat-conducting part covers an entire outer surface of the plastic body.

According to an embodiment of the present disclosure, the metal heat-conducting part covers an area corresponding to the electrical component.

According to an embodiment of the present disclosure, the cooling pipe comprises a first cooling pipe arranged on the metal body, and a second cooling pipe arranged on the metal heat-conducting part, and the second cooling pipe and the first cooling pipe are communicated with each other.

According to an embodiment of the present disclosure, the first cooling pipe or the second cooling pipe is further communicated with a cooling fluid supply system of a vehicle through an input spigot and an output spigot.

According to an embodiment of the present disclosure, the first cooling pipe is further communicated with a cooling fluid supply system of a vehicle through one of an input spigot and an output spigot, and the second cooling pipe is further communicated with the cooling fluid supply system of the vehicle through the other one of the input spigot and the output spigot.

According to an embodiment of the present disclosure, the cooling pipe comprises a second cooling pipe arranged on the metal heat-conducting part, and the second cooling pipe is communicated with a cooling fluid supply system of a vehicle through an input spigot and an output spigot.

According to an embodiment of the present disclosure, the input spigot and/or the output spigot is/are arranged perpendicular to the metal heat-conducting part or parallel to the metal heat-conducting part.

According to an embodiment of the present disclosure, the second cooling pipe is made of a metal and is welded to the metal heat-conducting part.

The present disclosure further relates to a vehicle, and the vehicle includes the electronic throttle as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

The advantages and objectives of the present disclosure can be better understood from the following detailed description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings. In order to better show the relationships among the components in the drawings, the drawings are not drawn to scale. In the drawings:

Fig. 1 is an overall schematic diagram of an electronic throttle for a vehicle in different directions according to an embodiment of the present disclosure;

Fig. 2 schematically shows a cooling pipe of an electronic throttle according to an embodiment of the present disclosure, wherein the left side diagram shows an external schematic diagram of the cooling pipe, and the right side diagram shows a cross-sectional view of the cooling pipe;

Fig. 3 is a highly schematic diagram of an electronic throttle according to another embodiment of the present disclosure, in which the dashed line schematically shows a cooling pipe;

Fig. 4 is a partial schematic diagram of a cover of an electronic throttle according to an embodiment of the present disclosure, which shows an interior of the cover;

Fig. 5 is an overall schematic diagram of a cover of an electronic throttle according to an embodiment of the present disclosure, in which the right side diagram is an enlarged schematic diagram of the circled part in the left side diagram and shows a plastic adapter of the cover and an external connector;

Fig. 6 is a partial schematic diagram of a plastic adapter of a cover in an electronic throttle according to another embodiment of the present disclosure;

Fig. 7 schematically shows a valve plate and a gas passage of an electronic throttle according to an embodiment of the present disclosure, in which the right side diagram is a sectional view taken along A-A of the left side diagram;

Fig. 8 is a schematic diagram of a cover of an electronic throttle according to another embodiment of the present disclosure, which shows a metal heat-conducting part of the cover and a cooling pipe;

Fig. 9 is a highly schematic diagram of an electronic throttle according to yet another embodiment of the present disclosure;

Fig. 10 is an overall schematic diagram of an electronic throttle for a vehicle according to an embodiment of the present disclosure;

Fig. 11 is an overall schematic diagram of the electronic throttle according to Fig. 10 in another direction;

Fig. 12 is an overall schematic diagram of an electronic throttle for a vehicle according to an embodiment of the present disclosure; and

Fig. 13 is a schematic diagram of a cover and a cooling pipe of an electronic throttle according to an embodiment.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of the embodiments of the disclosure apparent, the technical solutions of the embodiments will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the disclosure. The same reference signs in the drawings represent the same component. Apparently, the described embodiments are just a part but not all of the embodiments of the disclosure. Based on the described embodiments herein, those skilled in the art can obtain other embodiment (s) , without any inventive work, which should be within the scope of the disclosure.

Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms “first” , “second” , etc., which are used in the present disclosure, are not intended to indicate any sequence, amount, or importance, but distinguish various components. Also, similar words such as “a” , “an” or "one" do not necessarily mean quantitative restrictions. The terms “comprise” , “comprising” , “include” , “including” , etc., are intended to specify that the elements or the objects stated before these terms encompass the elements or the objects and equivalents thereof listed after these terms, but do not preclude the other elements or objects. The phrases “connect” , “communicate” , etc., are not intended to define a physical or mechanical connection or communication, but may include an equivalent connection thereof, no matter direct or indirect. “On” , “under” , “right” , “left” and the like are only used to indicate relative position relationship, and when the absolute position of the object which is described is changed, the relative position relationship may be changed accordingly.

An electronic throttle 100 according to an embodiment of the present disclosure as shown in Fig. 1 can be used in a vehicle, such as a motor vehicle or a hybrid vehicle. As shown in Fig. 1, an electronic throttle 100 includes: a metal body 1; an electric motor 2, a gear assembly 3, a valve shaft 4 and a valve plate 5 which are arranged in the metal body 1; and a cover 6. The metal body 1 is internally provided with a gas passage 20 for gas circulation, and can be made of an aluminum alloy. The gear assembly 3 is rotatable under a drive of the electric motor. The valve shaft 4 is rotatable under a drive of the gear assembly. The valve plate 5 is arranged on the valve shaft 4 and is rotatable between an opening position and a closed position, so that a gas cross section of the gas passage 20 can be controlled to control a gas flow entering the engine. In the present disclosure, the term “opening position” refers to that the valve plate 5 rotates to a position where the intake flow is maximized, and the term “closed position” refers to that the valve plate 5 rotates to a position where the intake flow is minimized, excluding the situation that the valve plate completely closes the gas passage. Moreover, because the electric motor 2, the gear assembly 3 and the valve shaft 4 are arranged inside the metal body 1, they are not shown in Fig. 1 and their general positions are shown in the right side diagram of Fig. 2 and the right side diagram of Fig. 7. Referring to Fig. 2, the electronic throttle 100 further includes a bearing 12 arranged in the metal body 1 and configured to support the valve shaft 4.

Referring to Fig. 1, Fig. 2 and Fig. 4, the cover 6 is mounted on the metal body 1 and forms a sealed chamber 7 together with the metal body 1; and the electrical component 8 of the electronic throttle 100 is arranged in the sealed chamber 7. The electrical component 8 may be a component sensitive to temperature, such as a sensor. For example, the whole cover 6 is made of a metal, such as aluminum alloy, so as to work in a high temperature environment. That is, the whole cover 6 can be used as a metal heat-conducting element. Moreover, the cover 6 has a heat-conducting surface 9 in contact with the metal body 1, and in Fig. 4, the heat-conducting surface 9 is an end face of a wall of the cover 6. In some other examples, the heat-conducting surface 9 may be located on the wall of the cover 6. Referring to Fig. 1 again, the metal cover 6 is connected to the metal body 1 through a plurality of clips 10. However, the present disclosure does not limit the connection mode between the cover and the metal body.

Referring to Fig. 2 again, the electronic throttle 100 is provided with a cooling pipe 11 at a position corresponding to the cover 6, and the cooling pipe 11 is configured to cool at least the cover 6. The cooling pipe 11 is arranged on the metal body 1. In the present disclosure, “a position corresponding to the cover” can be interpreted as a position spatially corresponding to the cover, such as a position adjacent thereto or in contact therewith, and can also be interpreted as a position which allows to cool the cover, whether directly or indirectly.

The cooling pipe 11 is also arranged at a position corresponding to at least two of the electric motor 2, the gear assembly 3 and the bearing 12, that is, the cooling pipe 11 is arranged adjacent to at least two of the electric motor 2, the gear assembly 3 and the bearing 12, so that the corresponding at least two can be cooled.

For example, as shown in the schematic diagram at the right side of Fig. 2, the cooling pipe 11 has a Z shape, that is, it is arranged at a position corresponding to (i.e., adjacent to) the electric motor 2, the gear assembly 3 and the bearing 12, so that the electric motor 2, the gear assembly 3 and the bearing 12 can be effectively cooled. The arrows in Fig. 2 show the flow direction of the cooling fluid in the cooling pipe 11. The cooling fluid flows through the three of the electric motor 2, the gear assembly 3 and the bearing 12, in sequence, from the left side of Fig. 2. As shown in the schematic diagram at the left side of Fig. 2, the cooling pipe 11 is connected to a cooling fluid supply system in the vehicle through a spigot 13. Moreover, the cooling pipe 11 has a plug 14. In some examples, the cooling pipe 11 is integrally formed with the metal body 1. A Z-shaped cooling pipe 11 is constructed by the spigot 13 and the plug 14.

The schematic diagram at the left side of Fig. 3 shows a front view of another embodiment, and the schematic diagram at the right side of Fig. 3 shows a top view of another embodiment. As shown in Fig. 3, the cooling pipe 11 shown by broken lines has an L shape, so that such cooling pipe 11 can effectively cool at least two of the electric motor, the gear assembly and the bearing. Of course, the cooling pipe 11 may have other shapes, as long as it can cool at least two of the electric motor, the gear assembly and the bearing.

Because the cover 6 is made of a metal, in order to avoid affecting the electrical component 8 in the sealed chamber 7, the cover 6 includes a plastic frame 15 mounted on its inner surface, and the electrical component 8 is mounted on the plastic frame 15, as shown in Fig. 4. The plastic frame 15 is fixed on the metal cover 6 by screws 18, for example, which can form good thermal isolation between the metal cover 6 and the electrical component 8 and also can ensure stability. A lead wire 16 related to the electrical component 8 and an electric motor plugging-in terminal 17 related to the electric motor 2 are integrated on the plastic frame 15. For example, the lead wire 16, the electric motor plugging-in terminal 17 and the like may be fixed onto the plastic frame 15 by means of welding.

With the above structure, due to the high thermal coefficient of the cover made of a metal, a rapid thermal conduction can be formed between the cover and the metal body, so that the heat brought by the environment in which the electronic throttle is located and the heat brought by the intake air can be effectively dissipated through the cooling pipe, and the influence on the electrical components in the electronic throttle is particularly little. By adopting the cooling pipe with the above shape, almost all parts of the electronic throttle are effectively cooled, and the maximum cooling effect is realized. Therefore, the electronic throttle of the present disclosure can withstand higher environmental temperature and intake temperature. The electronic throttle of the present disclosure can work in an extremely high temperature environment, for example, it can withstand an environmental temperature as high as 200° and an intake temperature as high as 210° when the vehicle engine runs at full load.

Considering that the electronic throttle of the present disclosure can work in an environment with extremely high temperature due to its special design, while the conventional external connector can only work under a lower environmental temperature, the cover 6 is also provided with a plastic adapter 21 which has an interface 25 for an external connector 26, as shown in Fig. 5. In this way, the external connector can be far away from the electronic throttle without being affected by the high temperature environment in which the electronic throttle is located; as a result, no special design is needed, and the common form in the market can be adopted.

In some examples, the plastic adapter 21 may be connected to the plastic frame 15, as shown in Figs. 4 and 5. In some other examples, the plastic adapter 21 may be separated from the plastic frame 15, and the connection of the plastic adapter 21 to the electrical component 8 mounted on the plastic frame 15 is made by an additional lead wire. Moreover, as shown in Fig. 5, the plastic adapter 21 is fixed onto an outer wall of the cover 6 by screws 23. As shown in Fig. 4, the plastic adapter 21 has a contact piece 19, such as a metal terminal, located in the sealed chamber 7. As shown in Fig. 5, a wiring harness 22 of the external connector 26 extends into the sealed chamber 7 and is connected with the contact piece 19. For example, the wiring harness 22 extends into the sealed chamber 7 by passing through a mounting hole 27 of the plastic adapter 21. The number of the mounting hole 27 depends on the specific application, without limiting in the present disclosure. In order to achieve good sealing of the sealed chamber 7, a sealing ring 24 is provided in each mounting hole 27. The sealing ring 24 is made of a rubber, for example. After welding the wiring harness 22 of the external connector 26 with the contact piece 19, they are integrally assembled into the mounting hole 27 of the plastic adapter 21. Then, the contact piece 19 is welded to the plastic frame 15, for example, to the lead wire 16 on the plastic frame 15. Thereafter, the sealing ring 24 is mounted in the mounting hole 27 to realize sealing.

In some other examples, as shown in Fig. 6, the interface 25 is filled with a sealing resin. For example, the interface 25 is filled by means of glue pouring. In this example, the plastic frame 15 is also provided with a lead contact 28, which extends from the lead wire 16 in the sealed chamber 7 to the interface 25. The wiring harness 22 of the external connector 26 is welded to the lead contact 28. The interface 25 is filled with the resin so as to achieve reliable sealing performance.

Due to the rapid thermal conduction between the metal cover 6 and the metal body 1, the sealing part used on the cover of the electronic throttle can also be effectively cooled, so it can work at higher environmental temperature and intake temperature.

As shown in Fig. 7, the valve plate 5 located in the gas passage 20 of the electronic throttle 100 is made of a material having a thermal expansion coefficient lower than that of the metal body 1. The valve plate 5 is made of a stainless steel, for example. By using the material with low thermal expansion coefficient, when the valve plate 5 works at an extreme temperature, a gap 29 is formed between the valve plate 5 and the wall of the gas passage 20 due to low thermal expansion, so that the valve plate can be prevented from stuck.

In another embodiment of the present invention as shown in Fig. 8, the cover 6 includes a plastic body 30, and the metal heat-conducting part 31 of the cover 6 is arranged on the plastic body 30. For example, the metal heat-conducting part 31 is a metal sheet and is arranged on an outer surface of the plastic body 30. For example, the metal heat-conducting part 31 is made of an aluminum alloy sheet. As shown in Fig. 8, the metal heat-conducting part 31 covers the entire outer surface of the plastic body 30. The cooling pipe 11 is in thermal communication with the metal heat-conducting part 31, for example, the cooling pipe 11 is in contact with the metal heat-conducting part 31 at a side edge of the metal heat-conducting part 31. The cooling pipe 11 as shown in Fig. 8 also extends into the metal body 1, for example, to cool the electric motor, the gear assembly and the bearing. The cooling fluid enters the cooling pipe 11 from the direction indicated by the arrow in Fig. 8, and flows into the metal body 1 after cooling the cover 6, so as to further cool the metal body 1. In some other examples, the cooling pipe 11 may also be located on a top surface of the metal heat-conducting part 31.

The schematic diagram at the left side of Fig. 9 shows a front view of yet another embodiment, and the schematic diagram at the right side of Fig. 9 shows a top view of the yet another embodiment. In Fig. 9, the metal heat-conducting part 31 covers only an area corresponding to the electrical component 8. The cooling pipe 11 may have a U shape, and may be located on the top surface of the metal heat-conducting part 31.

Figs. 10 and 11 show an electronic throttle 200 according to an embodiment of the present disclosure, the cover 6 of the electronic throttle 200 includes a plastic body 30, and the metal heat-conducting part 31 covers only a partial area on the outer surface of the plastic body 30, such as an area corresponding to the electrical component 8. The electrical component 8 can be, for example, a sensor, a PCB, an EMC filter component, etc. The metal heat-conducting part 31 may be a metal sheet, for example, mechanically connected to the metal body 1 by screws 311. Referring to Fig. 10 again, the cooling pipe may include a first cooling pipe 11’ and a second cooling pipe 11”. The first cooling pipe 11’ is arranged on the metal body 1 to cool important components of the electronic throttle 200. The second cooling pipe 11” is arranged on the metal heat-conducting part 31 and is mainly used to cool the electrical component and the cover 6. The second cooling pipe 11” can be made of a metal, such as aluminum, brass, etc. In addition, the second cooling pipe 11” can be welded, especially brazed to the metal heat-conducting part 31. In the example shown in Figs. 10 and 11, the second cooling pipe 11” and the first cooling pipe 11’ are communicated with each other. In other examples, the second cooling pipe 11” may not be communicated with the first cooling pipe 11’, both of which are communicated with the cooling fluid supply system of the vehicle (not shown here) . As shown in Fig. 10, the second cooling pipe 11” may have a U shape and be located on the top surface of the metal heat-conducting part 31. In addition, the first cooling pipe 11’ in Fig. 11 is communicated with the cooling fluid supply system of the vehicle through an input spigot 13’ and an output spigot 13”, and the input spigot 13’ and the output spigot 13” are arranged perpendicular to the metal heat-conducting part 31. In this case, the cooling fluid provided by the cooling fluid supply system of the vehicle first flows into the first cooling pipe 11’through the input spigot 13’, then into the second cooling pipe 11”, and then into the cooling fluid supply system through the output spigot 13”.

Fig. 12 shows an electronic throttle 300 according to another embodiment of the present disclosure, most of the components of which are the same or similar to those shown in Figs. 10 and 11, and only the differences are described here. As shown in Fig. 12, the second cooling pipe 11” is communicated with the cooling fluid supply system of the vehicle through the input spigot 13’, and is communicated with the first cooling pipe 11’. In addition, the first cooling pipe 11’ is communicated with the cooling fluid supply system of the vehicle through the output spigot 13”. As shown in Fig. 12, the input spigot 13’ is arranged parallel to the metal heat-conducting part 31, and the output spigot 13” is arranged perpendicular to the metal heat-conducting part 31. In this case, the cooling fluid provided by the cooling fluid supply system of the vehicle first flows into the second cooling pipe 11” through the input spigot 13’, then into the first cooling pipe 11’, and then into the cooling fluid supply system through the output spigot 13”. In other examples, the first cooling pipe 11’ is communicated with the cooling fluid supply system of the vehicle through the input spigot 13’, and the second cooling pipe 11” is communicated with the cooling fluid supply system of the vehicle through the output spigot 13”.

Fig. 13 shows a cover, a metal heat-conducting part and a second cooling pipe of an electronic throttle according to an embodiment of the present disclosure. In the example shown in Fig. 13, the second cooling pipe 11” is communicated with the cooling fluid supply system of the vehicle through the input spigot 13’ and the output spigot 13”, and the input spigot 13’ and the output spigot 13” are arranged perpendicular to the metal heat-conducting part 31.

With this structure, each component in the metal body of the electronic throttle would not be affected by the heat brought by the environment and the intake air, and the temperature-sensitive electrical component in the sealed chamber formed by the cover and the metal body would not be affected by the high temperature. Therefore, the electronic throttle of the present disclosure can withstand higher environmental temperature and intake temperature. The electronic throttle of the present disclosure can work in an environment with extremely high temperature, for example, it can withstand an environmental temperature as high as 200°and an intake temperature as high as 210° when the vehicle engine runs at full load.

Additionally, the technical features disclosed above are not limited to the combination with other features as disclosed, and the person skilled in the art can also combine the technical features in other ways according to the purpose of the present disclosure, so as to achieve the purpose of the present disclosure.

Claims

An electronic throttle, comprising:

a metal body (1) , in which a gas channel (20) is arranged,

an electric motor (2) , arranged in the metal body (1) ,

a gear assembly (3) , arranged in the metal body (1) and rotatable under a drive of the electric motor (2) ;

a valve shaft (4) , arranged in the metal body (1) and rotatable under a drive of the gear assembly (3) ;

a valve plate (5) , arranged in the metal body (1) and on the valve shaft (4) , and rotatable between an opening position and a closed position, and

a cover (6) , the cover being mounted on the metal body (1) and forming a sealed chamber (7) together with the metal body (1) , and an electrical component (8) being arranged in the sealed chamber (7) ,

wherein the electronic throttle (100, 200, 300) is provided with a cooling pipe (11) at a position corresponding to the cover (6) , and the cooling pipe is configured to at least cool the cover (6) .
The electronic throttle according to claim 1, wherein the cooling pipe (11) is arranged on the metal body (1) , and

the cover (6) is made of a metal and has a heat-conducting surface (9) in contact with the metal body (1) .
The electronic throttle according to claim 2, wherein the cover (6) is made of an aluminum alloy.
The electronic throttle according to claim 2, wherein the electronic throttle further comprises a bearing (12) which is arranged in the metal body (1) and configured to support the valve shaft (4) .
The electronic throttle according to claim 4, wherein the cooling pipe (11) is arranged at a position corresponding to at least two of the electric motor (2) , the gear assembly (3) and the bearing (12) .
The electronic throttle according to claim 5, wherein the cooling pipe (11) has a Z shape or an L shape.
The electronic throttle of claim 2, wherein the cover (6) comprises a plastic frame (15) mounted on an inner surface of the cover (6) , and the electrical component (8) is mounted on the plastic frame (15) .
The electronic throttle according to claim 7, wherein the cover (6) is further provided with a plastic adapter (21) , and the plastic adapter (21) has an interface (25) for an external connector (26) .
The electronic throttle according to claim 8, wherein the plastic adapter (21) is connected to the plastic frame (15) .
The electronic throttle according to claim 8, wherein the plastic adapter (21) has a contact piece (19) located in the sealed chamber (7) , and

a wiring harness (22) of the external connector (26) extends into the sealed chamber (7) and is connected with the contact piece (19) .
The electronic throttle according to claim 10, wherein the wiring harness (22) extends into the sealed chamber (7) by passing through a mounting hole (27) of the plastic adapter (21) .
The electronic throttle according to claim 11, wherein a sealing ring (24) is arranged in the mounting hole (27) .
The electronic throttle according to claim 8, wherein the interface (25) is filled with a sealing resin.
The electronic throttle according to claim 1, wherein the valve plate (5) is made of a material having a thermal expansion coefficient lower than that of the metal body (1) .
The electronic throttle according to claim 14, wherein the valve plate (5) is made of a stainless steel.
The electronic throttle according to claim 1, wherein the cover (6) comprises a plastic body (30) , and a metal heat-conducting part (31) is provided on the plastic body (30) .
The electronic throttle according to claim 16, wherein the cooling pipe (11) is in thermal communication with the metal heat-conducting part (31) .
The electronic throttle according to claim 16, wherein the metal heat-conducting part (31) is a metal sheet and is arranged on an outer surface of the plastic body (30) .
The electronic throttle according to claim 18, wherein the metal heat-conducting part (31) covers an entire outer surface of the plastic body (30) .
The electronic throttle according to claim 18, wherein the metal heat-conducting part (31) covers an area corresponding to the electrical component (8) .
The electronic throttle according to claim 18, wherein

the cooling pipe (11) comprises a second cooling pipe (11”) arranged on the metal heat-conducting part (31) , and the second cooling pipe (11”) is communicated with a cooling fluid supply system of a vehicle through an input spigot (13’) and an output spigot (13”) .
The electronic throttle according to claim 18, wherein

the cooling pipe (11) comprises a first cooling pipe (11’) arranged on the metal body (1) , and a second cooling pipe (11”) arranged on the metal heat-conducting part (31) , and the second cooling pipe (11”) and the first cooling pipe (11’) are communicated with each other.
The electronic throttle according to claim 22, wherein

the first cooling pipe (11’) or the second cooling pipe (11”) is further communicated with a cooling fluid supply system of a vehicle through an input spigot (13’) and an output spigot (13”) .
The electronic throttle according to claim 22, wherein

the first cooling pipe (11’) is further communicated with a cooling fluid supply system of a vehicle through one of an input spigot (13’) and an output spigot (13”) , and the second cooling pipe (11”) is further communicated with the cooling fluid supply system of the vehicle through the other one of the input spigot (13’) and the output spigot (13”) .
The electronic throttle according to claim 23 or 24, wherein

the input spigot (13’) and/or the output spigot (13”) is/are arranged perpendicular to the metal heat-conducting part (31) or parallel to the metal heat-conducting part (31) .
The electronic throttle according to any one of claims 21 to 24, wherein

the second cooling pipe (11”) is made of a metal and is welded to the metal heat-conducting part.
A vehicle, comprising the electronic throttle according to any one of claims 1 to 26.