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CN-121976901-A - Injection valve heat insulation device and vehicle

CN121976901ACN 121976901 ACN121976901 ACN 121976901ACN-121976901-A

Abstract

The invention relates to the technical field of vehicles, and discloses an injection valve heat insulation device and a vehicle, wherein the injection valve heat insulation device comprises a valve body and a guide cover, a first end of the valve body is provided with a cooling oil duct, a second end of the valve body is provided with a matched sealing surface, the guide cover is sleeved on the valve body, a first opening of the guide cover is in sealing connection with the valve body, the guide cover is provided with a sealing conical surface which is positioned at a second opening of the guide cover, the sealing conical surface is in sealing connection with the matched sealing surface along the circumferential direction of the guide cover, the cooling cavity for containing the cooling liquid is arranged between the air guide sleeve and the valve body and communicated with the cooling oil duct, when the combustion of the combustion chamber of the engine generates high temperature, the cooling liquid in the cooling cavity absorbs the high-temperature heat outside the air guide sleeve, then the cooling liquid conducts the heat outside the valve body through the cooling oil duct, the combustion high-temperature tempering is effectively avoided and conducted to the valve body, the structural strength of the valve body is reduced, the working stability of the valve body is improved, and therefore the injection effect of the injection valve can be guaranteed.

Inventors

  • HE JING
  • CAI ZHENHUI
  • YANG DIANYONG

Assignees

  • 一汽解放汽车有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (10)

  1. 1. Injection valve heat insulating device, characterized in that includes: the valve comprises a valve body (1), wherein the valve body (1) is provided with a first end and a second end, the first end is provided with a cooling oil duct (11), and the second end is provided with a matched sealing surface (12); Kuppe (2), kuppe (2) cover is located valve body (1), kuppe (2) have first opening and second opening, first opening with valve body (1) sealing connection, kuppe (2) are provided with sealed conical surface (21), sealed conical surface (21) are located second opening part, just sealed conical surface (21) with cooperation sealed face (12) sealing connection, follow the circumferencial direction of kuppe (2), kuppe (2) with have cooling cavity (3) that are used for holding the coolant liquid between valve body (1), cooling cavity (3) with cooling oil duct (11) intercommunication sets up.
  2. 2. The injection valve heat insulation device according to claim 1, further comprising a sealing member (4), wherein the air guide sleeve (2) is provided with a sealing groove (22), the sealing groove (22) is located at the first opening, the sealing member (4) is disposed in the sealing groove (22), and the sealing member (4) is in sealing connection with the valve body (1).
  3. 3. Injection valve heat insulation device according to claim 1, characterized in that it further comprises a heat exchanger arranged in communication with the cooling oil duct (11) and intended for heat exchange with the cooling cavity (3).
  4. 4. The injection valve heat insulation device according to claim 1, further comprising a thermostat provided in the cooling oil passage (11) for detecting an oil temperature of the cooling chamber (3), the thermostat closing the cooling oil passage (11) when the oil temperature of the cooling chamber (3) is lower than a set value, and the thermostat opening the cooling oil passage (11) when the oil temperature of the cooling chamber (3) is higher than a set value.
  5. 5. The injection valve heat insulation device according to claim 1, characterized in that the outer periphery of the valve body (1) is provided with an external thread, the inner ring of the first opening is provided with an internal thread, and the valve body (1) is in threaded connection with the guide cover (2).
  6. 6. The injection valve heat insulation device according to claim 1, characterized in that the angle between the sealing cone (21) and the horizontal plane is 60 °, the horizontal plane is arranged parallel to the first direction, and the angle between the mating sealing surface (12) and the horizontal plane is 60 °.
  7. 7. The injection valve heat insulation device according to claim 1, further comprising a heat insulation layer (5), the heat insulation layer (5) being provided at the outer periphery of the pod (2).
  8. 8. Injection valve heat insulation device according to claim 7, characterized in that the heat insulation layer (5) is made of a high temperature resistant material.
  9. 9. The injection valve heat insulation device according to claim 7, characterized in that the thickness of the heat insulation layer (5) ranges from 0.5 to 2.5mm.
  10. 10. A vehicle comprising an engine and the injection valve heat insulating device according to any one of claims 1 to 9, the injection valve heat insulating device being mounted to the engine.

Description

Injection valve heat insulation device and vehicle Technical Field The invention relates to the technical field of vehicles, in particular to an injection valve heat insulation device and a vehicle. Background The performance of a fuel injection valve as a core precision component of a fuel supply system for an internal combustion engine is directly related to the combustion efficiency, power output and emission level of the engine. Injection valves typically include a valve body, a needle coupling disposed within the valve body, and a drive mechanism, wherein the needle body is a critical moving component that is subjected to high pressure fuel, effecting high frequency opening and closing to accomplish accurate injection. In the operation of an engine, particularly for a direct injection engine in a cylinder, the nozzle portion of the injection valve is directly exposed to or very close to the high temperature, high pressure combustion chamber environment, so that the needle valve body is subjected to not only mechanical load but also continuous high temperature load from the combustion chamber. In the prior art, high temperature generated by fuel combustion in a combustion chamber can be directly conducted inwards through the wall surface of a valve body of an injection valve, and when the temperature of a region where a needle valve body is located exceeds the tempering temperature of material heat treatment for a long time by the conducted high temperature, the material of the needle valve body is tempered for the second time, and the material is continuously softened and aged at the high temperature, so that the stability and sealing reliability of the injection valve are seriously affected. In order to solve the above problems, the needle valve body is made of a material such as a high-temperature alloy with better heat resistance, however, the material has extremely high cost and complex processing technology, so that the overall manufacturing cost of the injection valve is obviously increased. Therefore, on the premise of not obviously increasing the material cost and not changing the material, the conduction of the combustion Gao Wenxiang valve body is effectively blocked or dredged, and the technical problems of improving the reliability and reducing the cost of the injection valve are to be solved urgently. Disclosure of Invention The invention aims to provide an injection valve heat insulation device and a vehicle, which are used for solving the problems of the injection valve in the related art. In order to solve the problems existing in the prior art, the invention adopts the following technical scheme: Injection valve heat insulating device includes: The valve body is provided with a first end and a second end, the first end is provided with a cooling oil duct, and the second end is provided with a matched sealing surface; the kuppe, the kuppe cover is located the valve body, the kuppe has first opening and second opening, first opening with valve body sealing connection, the kuppe is provided with sealed conical surface, sealed conical surface is located second opening part, just sealed conical surface with cooperation sealed face sealing connection follows the circumferencial direction of kuppe, the kuppe with have the cooling cavity that is used for holding the coolant liquid between the valve body, the cooling cavity with the cooling oil duct intercommunication sets up. As an optional technical scheme, the injection valve heat insulation device further comprises a sealing element, the air guide sleeve is provided with a sealing groove, the sealing groove is located at the first opening, the sealing element is arranged in the sealing groove, and the sealing element is in sealing connection with the valve body. As an optional technical scheme, the injection valve heat insulation device further comprises a heat exchanger, wherein the heat exchanger is communicated with the cooling oil duct and is used for exchanging heat with the cooling cavity. As an optional technical scheme, the injection valve heat insulation device further comprises a thermostat, the thermostat is arranged in the cooling oil duct, the thermostat is used for detecting the oil temperature of the cooling cavity, when the oil temperature of the cooling cavity is lower than a set value, the thermostat closes the cooling oil duct, and when the oil temperature of the cooling cavity is higher than the set value, the thermostat opens the cooling oil duct. As an optional technical scheme, the periphery of the valve body is provided with external threads, the inner ring of the first opening is provided with internal threads, and the valve body is in threaded connection with the air guide sleeve. As an optional technical scheme, the included angle between the sealing conical surface and the horizontal plane is 60 degrees, the horizontal plane is arranged in parallel with the first direction, and the included angle between the matc