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CN-121976875-A - Engine thermostat seat, engine and vehicle

CN121976875ACN 121976875 ACN121976875 ACN 121976875ACN-121976875-A

Abstract

The application relates to the technical field of engine cooling systems, and discloses an engine thermostat seat, an engine and a vehicle. The thermostat seat of the engine comprises a thermostat seat body, a separation assembly and a blocking amount driving assembly, wherein the thermostat seat body is provided with a liquid inlet cavity and a seat cavity which are communicated through a first through hole, the liquid inlet cavity is provided with a first liquid inlet for inputting cooling liquid and a first connecting port for connecting a retarder and outputting the cooling liquid, the seat cavity is provided with a first liquid outlet for outputting the cooling liquid and a second connecting port for connecting the retarder and inputting the cooling liquid, the first liquid outlet is used for installing the thermostat, the separation assembly comprises a separation plate, at least part of the separation plate is arranged in the thermostat seat body, and the blocking amount driving assembly is configured to adjust the first through hole through relative movement of the thermostat seat body and is used for driving the separation plate to act. The engine thermostat seat can optimize the structure of a cooling system, reduce the burden of a water pump and improve the anti-cavitation capacity of the engine thermostat seat by optimizing the structure of the engine thermostat seat.

Inventors

  • TIAN DAN
  • PANG JIANQI

Assignees

  • 北京福田康明斯发动机有限公司

Dates

Publication Date
20260505
Application Date
20260305

Claims (17)

  1. 1. An engine thermostat base, comprising: the thermostat comprises a thermostat seat body, a thermostat body and a cooling device, wherein the thermostat seat body is provided with a liquid inlet cavity and a seat cavity which are communicated through a first through hole, the liquid inlet cavity is provided with a first liquid inlet for inputting cooling liquid and a first connecting port for connecting a retarder and outputting the cooling liquid; a separation assembly including a separation plate, at least a portion of which is disposed in the thermostat housing and configured to adjust a blocking amount of the first through hole by moving relative to the thermostat housing; and the driving assembly is used for driving the partition plate to act.
  2. 2. The engine thermostat seat of claim 1, wherein the thermostat seat body further comprises an assembly hole, the partition assembly further comprises a rotating rod, a part of the rotating rod is assembled in the assembly hole, and a part of the rotating rod is exposed in the first through hole; The partition plate is mounted to a part of a peripheral side surface of the rotating lever exposed in the first through hole and follows the rotating lever.
  3. 3. The engine thermostat seat of claim 2, wherein the first through hole has a diameter dimension D, the partition plate has an elliptical plate, a minor axis direction of the elliptical plate is parallel to an axial direction of the rotating rod, a minor axis dimension of the elliptical plate is A1, the A1 is smaller than the D, a major axis dimension of the elliptical plate is A2, and the A2 is larger than the D; The separation assembly is provided with a first maximum travel, when the separation assembly is positioned in the first maximum travel, the separation plate is configured to have the largest blocking amount for the first through hole, the separation plate and the section of the first through hole form an included angle, and the included angle ranges from 15 degrees to 19 degrees.
  4. 4. The engine thermostat seat of claim 3 wherein A1 is 1 to 2mm smaller than D and A2 is 1 to 2mm larger than D.
  5. 5. The thermostat of any one of claims 2 to 4, wherein the driving assembly includes a cylinder and a connecting member, the cylinder includes a cylinder block and a piston rod, the cylinder block is fixed with respect to the thermostat block, one end of the piston rod is disposed in the cylinder block and is movable in an axial direction of the piston rod with respect to the cylinder block, the other end of the piston rod is hinged to one end of the connecting member, the other end of the connecting member is fixedly connected to the rotating rod, and an axial direction of the piston rod is perpendicular to an axial direction of the rotating rod.
  6. 6. The engine thermostat seat of claim 5 wherein the rotating lever is connected to the connecting member by a bolt, an axis of the bolt being coincident with an axis of the rotating lever.
  7. 7. The engine thermostat seat of claim 5 further comprising a limit assembly including a boss mounted to an end of the rotating lever proximate the connector and following the rotating lever, the boss extending radially of the rotating lever away from the rotating lever, and a stop located on a side of the rotating lever facing the drive assembly and located in a swing path of the boss about an axis of the rotating lever.
  8. 8. The engine thermostat seat according to any one of claims 2 to 4, wherein the assembly hole is a through hole, the engine thermostat seat further comprises a sealing assembly, the sealing assembly comprises a plug, the plug and one side end face of the rotating rod, which faces away from the driving assembly, are arranged at intervals along the axial direction of the rotating rod, and the assembly hole is plugged, and the intervals range is 3 mm-4 mm.
  9. 9. The engine thermostat seat of claim 8, wherein the sealing assembly further comprises a sealing ring, the sealing ring is located in a part of the assembly hole between the first through hole and the driving assembly along the axial direction of the rotating rod, and the sealing ring is sleeved on the outer peripheral surface of the rotating rod and clamped between the rotating rod and the hole wall of the assembly hole.
  10. 10. The engine thermostat seat of claim 9 wherein the seal assembly includes a plurality of spaced apart seal rings along an axial direction of the rotating stem.
  11. 11. The engine thermostat seat of claim 10 wherein the peripheral wall of the rotating lever is provided with a groove, a portion of the seal ring being disposed in the groove.
  12. 12. The engine thermostat seat of any one of claims 2-4, further comprising a support assembly including a bushing and a bearing, the bushing being positioned axially along the rotating rod on a side of the rotating rod facing away from the drive assembly, the bushing being positioned within the mounting hole and fixed in position relative to the thermostat seat, the bearing being positioned within the mounting hole and fixed in position relative to the thermostat seat on a side of the rotating rod adjacent to the drive assembly.
  13. 13. An engine comprising a retarder and an engine thermostat housing as claimed in any one of claims 1-12, the retarder having an inner cavity and two interfaces communicating with the inner cavity, one of the two interfaces being connected to a first connection port in the engine thermostat housing and the other interface being connected to a second connection port in the engine thermostat housing.
  14. 14. The engine of claim 13, further comprising an engine body having a first passage for delivering a cooling fluid, the first passage having a second fluid inlet and a second fluid outlet, the second fluid outlet of the first passage being in communication with the first fluid inlet of the engine thermostat housing, the second fluid inlet of the first passage being in communication with the first fluid outlet of the engine thermostat housing.
  15. 15. The engine of claim 14, wherein the engine body comprises a cylinder head and a cylinder block, the first liquid outlet of the first passage is provided in the cylinder head or the cylinder block, and the first liquid inlet of the first passage is provided in the cylinder head or the cylinder block.
  16. 16. A vehicle comprising an engine as claimed in any one of claims 13 to 15, the vehicle further comprising an engine control module connected to the drive assembly in the engine thermostat seat for controlling the operation of the drive assembly.
  17. 17. The vehicle of claim 16, further comprising an air cylinder coupled to a cylinder block of a cylinder in the drive assembly within the engine thermostat block for delivering air to the cylinder.

Description

Engine thermostat seat, engine and vehicle Technical Field The application relates to the technical field of engine cooling systems, in particular to an engine thermostat seat, an engine and a vehicle. Background In engine design, the cooling system is used as one of the core components, and the performance of the cooling system directly influences the reliability and heat balance capacity of the whole engine. Along with the continuous improvement of the power density of the engine and the increase of cooling demands of auxiliary devices (such as a fuel evaporator and a hydraulic retarder) of the whole vehicle, the load of a cooling system is obviously increased, and further, higher requirements are provided for the liquid supply capacity and the working stability of a water pump. Particularly in a high horsepower diesel engine, the water pump not only needs to provide sufficient cooling for the engine body, but also needs to bear the heat dissipation task of a plurality of peripheral components, so that the engine is in a high-flow and high-lift running state for a long time. The power consumption of the water pump is increased, the effective output efficiency of the whole machine is reduced, meanwhile, the risk of cavitation erosion in the water pump is obviously improved, and the service life of the water pump and the safety of the system are influenced. Therefore, there is a need to address optimizing cooling system architecture, reducing water pump load, and improving its anti-cavitation capability. Disclosure of Invention The application discloses an engine thermostat seat, an engine and a vehicle, wherein the engine thermostat seat optimizes the structure of the engine thermostat seat, the cooling system structure can be optimized, the burden of the water pump can be reduced, and the cavitation resistance of the cooling system can be improved. In order to achieve the above purpose, the present application provides the following technical solutions: In a first aspect, the present application provides an engine thermostat base comprising: the thermostat comprises a thermostat seat body, a thermostat body and a cooling device, wherein the thermostat seat body is provided with a liquid inlet cavity and a seat cavity which are communicated through a first through hole, the liquid inlet cavity is provided with a first liquid inlet for inputting cooling liquid and a first connecting port for connecting a retarder and outputting the cooling liquid; a separation assembly including a separation plate, at least a portion of which is disposed in the thermostat housing and configured to adjust a blocking amount of the first through hole by moving relative to the thermostat housing; and the driving assembly is used for driving the partition plate to act. The engine thermostat seat provided by the application divides the interior of the thermostat seat into two spaces, namely the liquid inlet cavity and the seat cavity, and is matched with the working state of the retarder, the blocking quantity of the partition plate in the partition assembly to the first through hole communicated with the liquid inlet cavity and the seat cavity is adjusted through the driving assembly, the introduction quantity of cooling liquid to the retarder is controlled, and the differential design is realized. Specifically, on the premise that the total coolant flow is certain, the coolant is controlled to be split, so that the flow of the coolant to the retarder when the retarder works is larger than the flow of the coolant to the retarder when the retarder does not work. The retarder only works when the whole vehicle brakes and decelerates, and the engine is not at a high rotating speed at the moment, so that the engine itself needs low cooling liquid, and the cooling liquid flowing to the engine in a split way does not influence the effect of the engine. Therefore, the engine thermostat seat provided by the application can optimize the structure of a cooling system, reduce the total flow of cooling liquid, reduce the burden of a water pump and improve the anti-cavitation capacity of the water pump, or meet the requirements of two states of a retarder by configuring a lower-power water pump, save the oil consumption of an engine and realize the energy-saving effect. In some embodiments, the thermostat housing further comprises an assembly hole, the separation assembly further comprises a rotating rod, a part of the rotating rod is assembled in the assembly hole, and the other part of the rotating rod is exposed in the first through hole; The partition plate is mounted to a part of a peripheral side surface of the rotating lever exposed in the first through hole and follows the rotating lever. In some embodiments, the first through hole has a diameter dimension D, the partition plate is an elliptical plate, the minor axis direction of the elliptical plate is parallel to the axial direction of the rotating rod, the minor axis dimension of t