Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D23/00—Control of temperature
  • G05D23/01—Control of temperature without auxiliary power
  • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
  • G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
  • G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
  • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
  • F01P11/028—Deaeration devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P7/00—Controlling of coolant flow
  • F01P7/14—Controlling of coolant flow the coolant being liquid
  • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P7/00—Controlling of coolant flow
  • F01P7/14—Controlling of coolant flow the coolant being liquid
  • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
  • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
  • F16K24/02—Devices, e.g. valves, for venting or aerating enclosures the enclosure being itself a valve, tap, or cock
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation

Definitions

• the present invention relates to a cooling water circuit for an engine that circulates cooling water for cooling an internal combustion engine (hereinafter referred to as an engine) used for an automobile or the like with heat exchange (hereinafter referred to as a radiator).
• the present invention also relates to a thermostat device that is a temperature-sensitive automatic valve that is used to control the coolant temperature by switching the flow of engine coolant by operating according to the temperature change of the coolant.
• a water cooling type cooling system using a radiator In order to cool an automobile engine, a water cooling type cooling system using a radiator is generally used.
• Conventional power In this type of cooling system there is a thermostat using a thermal expansion body that adjusts the amount of cooling water circulated to the radiator side and a valve unit with electric control so that the temperature of the cooling water introduced into the engine can be controlled. in use.
• a thermostat using the above-described thermal expansion body or a control nove by an electrically controlled valve unit or the like is interposed in a part of the cooling water passage, for example, the inlet side or the outlet side of the engine, and the cooling water temperature
• the control valve is closed and the cooling water is circulated through the bypass passage without passing through the radiator.
• the control valve is opened and the cooling water passes through the radiator.
• a jiggle valve is provided in parallel with the open / close valve constituting the thermostat device for discharging air accumulated in the coolant passage of the engine when the coolant is injected.
• This jiggle valve is configured to open and close an air vent passage provided in a mounting flange of the on-off valve.
• this jiggle valve is also closed by water pressure during engine operation, eliminating the leakage of cooling water to the engine power radiator, preventing unnecessary heat dissipation and shortening the warm-up operation time.
• a valve body of this type of jiggle valve includes a valve body portion having a diameter larger than that of the air vent passage, and the passage. It is considered that the rod portion is inserted into the path and the retaining head portion that prevents the rod portion from coming off at the tip of the rod portion, and that the valve body is conventionally formed of a synthetic resin material.
• Such a valve element of a jiggle valve behaves such as rocking due to the influence of the water pressure and flow of the cooling water in the cooling water passage, so that an air vent passage is configured to ensure the valve closing state. Measures have been taken such as forming the valve seat portion of the hole to be formed into a large-diameter hole and forming the opening edge into a tapered shape (for example, see Patent Document 1 and Patent Document 2).
• Patent Document 1 Japanese Utility Model Publication No. 61-28962
• Patent Document 2 Japanese Utility Model Publication No. 61-28964
• the jiggle valve used in the above-described conventional thermostat device has the following problems.
• the large-diameter valve body portion and the retaining head portion are present at both ends of the rod portion inserted into the air vent passage. And it was complicated.
• the head part for retaining is formed separately and the rod part is fitted into the air vent passage and then the head part is assembled to the tip of the rod part, the workability is improved.
• valve body is formed of a synthetic resin material
• the valve body portion is lightweight, so that it is likely to behave when cooling water is injected into the cooling water passage, and the air vent passage is closed. There was a bug b.
• valve body is formed of a synthetic resin material
• shrinkage called sink occurs during molding, and there is a problem that the shape is deformed and a seal failure occurs when the valve is closed.
• the present invention has been made in view of such circumstances, and it is possible to easily perform the molding process and assembly work of the valve body of the jiggle valve, and to provide a valve body of the jiggle valve by the water pressure and flow of the cooling water.
• the purpose is to obtain a thermostat device which can prevent the behavior and obtain a stable opening / closing operation of the air vent passage.
• the present invention (the invention according to claim 1) is provided with a thermostat device provided in a cooling water passage of an internal combustion engine, and the thermal expansion of a thermal expansion body due to a temperature change of the cooling water, It has a piston rod that slides by contraction, and has an on-off valve that opens and closes the valve body by sliding of the piston rod accompanying a change in volume of the thermal expansion body, and an air vent passage provided in a mounting flange of the on-off valve
• the thermostat device includes a jiggle valve that is provided in parallel with the on-off valve so as to open and close, and that has a valve body that receives the water pressure of the cooling water and closes the air vent passage.
• the valve body of the jiggle valve is more than the air vent passage.
• a rod part that is formed of an elastic material so as to have a large-diameter columnar shape, and is fitted into the air vent passage, and a retaining member provided at the tip of the rod part. It becomes a head portion, a portion of the outer peripheral portion of the cylindrical valve body, characterized that you have been stepped portion of smaller diameter than the peripheral portion is formed.
• the “small-diameter stepped portion” refers to, for example, a hollow portion obtained by forming concave portions uniformly along the circumferential direction in a part of the axial direction of the outer circumferential portion of the valve body.
• a cross-sectional shape of such a cutout portion for example, a cross-sectional shape having an appropriate shape such as a cross shape, a prismatic shape, or a cylindrical shape may be employed.
• the thermostat device according to the present invention is the thermostat device according to claim 1, wherein the rod portion and the retaining head portion are made of an elastic material on the valve body of the gidal valve.
• the groove is formed integrally, and a slot is formed along the axial direction from the tip of the retaining head.
• a thermostat device (invention according to claim 3) is an air vent passage of a mounting flange into which the rod portion of the jiggle valve is fitted and inserted into the thermostat device according to claim 1 or claim 2.
• An opening edge on the side of the retaining head portion of the passage hole constituting the taper surface is formed by performing C surface processing, and a corner portion formed on the proximal end side of the retaining head portion on the tapered surface It is characterized by comprising so that it may contact
• a thermostat device (invention according to claim 4) is an air vent passage of a mounting flange into which the rod portion of the jiggle valve is fitted and inserted into the thermostat device according to claim 1 or claim 2.
• the opening edges on the head hole side and the valve element side of the passage hole that constitutes the taper surface are each formed into a tapered surface shape by applying C surface processing, and one taper
• the surface is configured as a retaining portion where the corner portion on the base end side of the retaining head portion contacts, and the other tapered surface is configured as a valve seat on which the valve body is seated.
• the valve body of the jiggle valve in which the valve body portion, the rod portion, and the retaining head portion are integrally formed of the inertia material is provided on the mounting flange of the opening / closing valve of the thermostat device.
• the assembly work can be done very simply by simply inserting it into the air vent passage.
• a small-diameter stepped portion thickening portion
• the tip side portion becomes the center of gravity rather than the small-diameter step portion. It is possible to prevent the behavior of the valve body in such a manner.
• the invention's effect is possible to prevent the behavior of the valve body in such a manner.
• a step portion having a smaller diameter than the outer peripheral portion is formed on a part of the outer peripheral portion of the cylindrical valve body constituting the jiggle valve.
• the spherical tapered surface (seal surface) portion of the conical seat portion has a force that may cause distortion or the like during the cooling process during molding with a large volume.
• the center of gravity can be moved to the distal end side of the valve body due to the presence of the small-diameter stepped portion, so that it is easy to maintain the valve open state when water is injected. Work can be done easily.
• the head portion for retaining can be elastically deformed by the action of the slit groove, the head portion and the rod portion are inserted into and inserted into the air vent passage. Therefore, the assembling work can be performed very easily.
• the opening edge of the passage hole constituting the air vent passage on the head portion side for retaining is formed into a tapered surface shape by performing C-surface processing, and the taper surface is used for retaining the retaining surface. Since the corner portion on the base end side of the head portion is brought into contact with the head portion, the head portion is always attached to the mounting frame. It can maintain a vertical posture with respect to the flange and exert a retaining effect.
• the opening edge of the passage hole constituting the air vent passage on the head portion side for retaining and the opening on the valve body side are each formed into the same tapered surface shape by performing C-face machining.
• the mounting flange is processed. This is advantageous in that it can be carried out easily and reliably, is advantageous in terms of cost, and can use a conventional metal material as the flange.
• FIG. 1 to 3 show one embodiment of a thermostat device according to the present invention.
• the cooling system for an engine is arranged to face the cooling water channel on the inlet side of the engine and is used for controlling the cooling water temperature.
• reference numeral 10 denotes a thermostat device, which opens and closes the cooling water open circuit between the engine side (water jacket outlet side) and the bypass passage (not shown) and between the radiators according to the cooling water temperature. It is configured.
• reference numeral 1 denotes a cooling water passage from the engine side
• 2 denotes a cooling water passage to the radiator
• 3 denotes a cooling water passage that bypasses the radiator and reaches a bypass passage that returns to the engine.
• the thermostat device 10 is configured to block the passage 2 to the radiator and circulate and circulate cooling water through the passage 1 on the engine side force through the passage 3 on the bypass passage side and in the passage 1 on the engine side force.
• the state in which the cooling water is circulated and circulated in the passage 2 to the radiator side is provided so that it can be switched according to the cooling water temperature.
• thermostat 10 It is desirable to install the thermostat 10 in the vicinity of the engine head of the engine. This is because the thermostat 10 can be controlled at a temperature closest to the actual engine temperature.
• the thermostat 10 described above includes a housing 11 having cooling water passages 1 and 2 (hereinafter referred to as a housing 11 including a lid 11A) and the passages 1 and 2 described above. 2 and a temperature-sensitive case 13 having a lower end facing a water chamber 11a formed in the housing 11 through the passage 3 to the bypass passage and a change in the temperature of the cooling water. It is possible to slide the temperature sensitive case 13 according to expansion and contraction. And a wax 15 as a thermal expansion body built in the temperature sensitive case 13. The passage 15 is closed when the wrap 15 is contracted, and when the wax 15 is expanded, the ascending passages 1 and 2 are connected to circulate and circulate cooling water to the radiator 4 side.
• the thermostat 10 is disposed in the housing 11 extending vertically so as to constitute the middle of the cooling water passages 1 and 2 as the main passage, and the mounting flange 12a is fixedly held on the inner wall of the housing 11.
• a spring 16 that normally positions the valve body 13a in the valve closed position.
• Wax (not shown) is built in the temperature sensitive case 13, and the valve element 13a is opened and closed by this thermal expansion and contraction.
• a piston rod 17 is provided at one end of the temperature sensitive case 13 so as to move in accordance with a volume change caused by thermal expansion and contraction of the nitrogen.
• reference numeral 18 denotes a locking frame provided integrally with the temperature sensitive case 13 described above.
• a passage hole 21 serving as an air vent passage is formed in a part of the flange 12a held and fixed on the housing 11 side, and a jiggle valve 20 for opening and closing the passage hole 21 is provided. Being! /
• the jiggle valve 20 opens and closes an air vent passage (hereinafter referred to as 21) provided in the mounting flange 12a of the on-off valve constituting the thermostat device 10.
• a valve body 22 is provided in parallel with the on-off valve and receives the coolant pressure of the cooling water to close the air vent passage 21.
• the valve element 22 of the jiggle valve 20 is more than the air vent passage 21.
• a rod part 23 fitted into the air vent passage 21 and a retaining head part 24 provided at the tip of the rod part 23 are formed of an elastic material such as a synthetic resin so as to have a large cylindrical shape. And are integrally molded.
• the end of the cylindrical valve body 22 on the rod portion 23 side is formed as a conical seating portion 22a, and the sealing surface of the seating portion 22a is formed by a spherical tapered surface. Further, in a part in the axial direction of the outer peripheral portion of the cylindrical valve body 22 adjacent to the seating portion 22a, a concave portion 25a is uniformly formed along the circumferential direction as a step portion having a smaller diameter than the outer peripheral portion. Thus, a lightening portion 25 is formed.
• the thinned portion 25 is formed with a cross-sectional shape having a substantially cross shape. This is to prevent heat sink after molding when the valve body 22 is molded, and to make the shrinkage uniform when the heat sink occurs. The shape is the same volume from the direction and the mold force can be easily taken out.
• the tapered surface (seal surface) portion of the conical seating portion 22a may be distorted during the cooling process during molding with a large volume.
• the portion adjacent to the taper surface in the axial direction is a hollow portion 25 formed uniformly in the circumferential direction, so that the entire volume can be made almost uniform, the shape is stable, As a result, a good valve seat can be formed from the viewpoint of sealing performance.
• the rod portion 23 protruding in the axial direction from the seating portion 22a is formed as a plate-like rod, and the retaining head portion 24 having a wedge shape is integrally formed at the tip portion thereof. Forming. Furthermore, a slit groove 26 is also formed along the axial direction of the tip force of the retaining head portion 24. The slit 26 is for elastically deforming the wedge-shaped portion of the head portion 24 when the retaining head portion 24 and the rod portion 23 are inserted into the air vent passage 21.
• the clearance slit groove 26 between the rod portion 23 having such a shape and the passage hole 21 functions as an air vent passage when the jiggle valve 20 is opened.
• the elastic material forming the valve body 22 described above for example, PPS (polyphenylene)
• engineering plastics synthetic resins
• sulfide resin synthetic resins
• the opening edge of the passage hole 21 constituting the passage on the side of the retaining head portion 24 side is a C surface.
• a tapered surface shape is formed by processing, and the corner portion 24a formed on the proximal end side of the retaining head portion 24 is brought into contact with the tapered surface 27.
• the opening edge on the valve body 22 side is also formed in the same tapered surface shape by applying a C surface force.
• the taper surface 28 is configured as a valve seat on which the seat 22a of the valve body 22 is seated.
• the valve body 22 of the jiggle valve 20 in which the valve body portion 22a, the rod portion 23, and the retaining head portion 24 are integrally formed of an elastic material is attached to the opening / closing valve of the thermostat device 10.
• the assembly work can be done very simply by simply inserting it into the air vent passage 21 provided in the flange 12a.
• the hollow portion 25 is formed in the outer peripheral portion of the valve body portion of the valve body 22 and the center of gravity moves to the tip side portion thereof, the valve body at the time of injecting cooling water or the like This has the advantage of preventing the behavior of 22 and facilitating water injection.
• a part of the outer peripheral portion of the cylindrical valve body 22 constituting the jiggle valve in the axial direction is formed as a thinned portion 25 that is uniformly thinned in the circumferential direction.
• the conical shape of the seating portion 22a of the valve body 22 can be smoothly formed, and a reliable seating state can be obtained to obtain a jiggle valve.
• the function as 20 can be demonstrated.
• the tapered surface (seal surface) portion of the conical seating portion 22a may be distorted in the cooling process during molding with a large volume.
• the entire volume can be made substantially uniform, the shape is stabilized, and as a result A good valve seat portion can be formed. Therefore, an appropriate valve closing state as the jiggle valve 20 can be obtained.
• the present invention is not limited to this, and a hollow portion 25 having a shape obtained by forming a step portion having a smaller diameter than the outer peripheral portion, for example, a circumferentially extending concave portion, over the outer peripheral portion of the valve body. Any suitable modification may be considered as the cross-sectional shape.
• the head part 24 for retaining can be elastically deformed by the action of the slit groove 26, so that the head part 23 and the rod part 14 are simply provided in the air vent passage 21. Assembling work can be done very easily by inserting and inserting.
• the opening edge of the passage hole 21 constituting the air vent passage on the side of the head portion 24 for retaining is formed into a tapered surface shape by performing C surface processing, and the head portion 24 for retaining the retaining surface 24 is formed on the tapered surface 27. It is possible to keep the head portion 24 in a vertical position with respect to the mounting flange 12a by bringing the base end side corner portion 24a into contact with each other, thereby exhibiting a retaining effect. Can do it.
• the opening edge on the valve body 22 side of the passage hole 21 constituting the air vent passage is also formed into the same tapered surface shape by applying C surface force, and the tapered surface thereof.
• the mounting flange 12a can be processed easily and reliably, which is advantageous in terms of cost, and the flange 12a also uses a conventional metal material. There are also advantages such as being able to.
• the mouth portion 23 that protrudes from the seating portion 22a in the valve body 22 is formed in a plate shape, and the retaining head portion 24 is formed in a wedge shape, and the tip force is also increased.
• the slit groove 26 is formed along the axial direction is illustrated, the present invention is not limited to this, and an appropriate modification can be considered.
• a columnar rod part and a retaining head part with a retaining part at the tip are formed, and one or more strips are formed from the tip. It may be a shape with slits in the strip.
• FIG. 1 is a cross-sectional view of a principal part showing details of a jiggle valve as a principal part, showing an embodiment of a thermostat device according to the present invention.
• FIG. 2 is a schematic perspective view showing a valve body of the jiggle valve of FIG. 1.
• FIG. 3 is a schematic sectional view showing a thermostat device to which the present invention is applied and a state of attachment to an engine cooling water circuit.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Automation & Control Theory (AREA)
• Temperature-Responsive Valves (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36740151

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (8)

Family Cites Families (2)

• 2005
  • 2005-01-31 JP JP2005022348A patent/JP4471374B2/ja not_active Expired - Fee Related
  • 2005-10-24 EP EP05795567A patent/EP1845239B1/en not_active Ceased
  • 2005-10-24 WO PCT/JP2005/019467 patent/WO2006080117A1/ja active Application Filing
  • 2005-10-27 TW TW094137647A patent/TW200632208A/zh not_active IP Right Cessation

Patent Citations (8)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events