CN111794847A - Electric heating type thermostat for internal combustion engine - Google Patents
Electric heating type thermostat for internal combustion engine Download PDFInfo
- Publication number
- CN111794847A CN111794847A CN202010614832.8A CN202010614832A CN111794847A CN 111794847 A CN111794847 A CN 111794847A CN 202010614832 A CN202010614832 A CN 202010614832A CN 111794847 A CN111794847 A CN 111794847A
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- Prior art keywords
- ball valve
- sensing element
- temperature sensing
- sleeve
- internal combustion
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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- 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
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention relates to an electric heating type thermostat for an internal combustion engine, which comprises a base, a temperature sensing element, a cover body and a ball valve, wherein the temperature sensing element is provided with a sleeve, and the sleeve is movably arranged on the base; the sleeve is provided with a kidney-shaped hole, and the ball valve in the cover body is provided with a connecting rod matched with the kidney-shaped hole. When the temperature regulator is required to regulate larger flow, the diameter of a ball valve in the temperature regulator can be enlarged, and at the moment, the acting force of water flow on the ball valve is applied to the spherical surface, the acting force can be always concentrated towards the center of the sphere, so that the influence of the acting force of water flow on the stress oscillation in the opening process of the ball valve is weakened; the combination of the temperature sensing element of the temperature regulator and the crank sliding block mechanism improves the stress condition of the temperature sensing element, and the temperature sensing element bears the action force of the spring and only needs to bear the friction force caused by the rotation of the ball valve, so that the service life of the temperature regulator is prolonged; when the ball valve is used, the flow resistance can be obviously reduced, and the power loss of the water pump is reduced, so that the efficiency of the internal combustion engine is improved.
Description
Technical Field
The present invention relates to engine cooling systems, and more particularly to electrically heated thermostats for internal combustion engines.
Background
A conventional wax type thermostat is widely used for the internal combustion engine to adjust the temperature of coolant. Although the traditional wax type temperature regulator has the advantages of simple structure, reliable performance, low price and the like, the traditional wax type temperature regulator has certain limitation, namely the flow distribution of the large/small circulation of the cooling liquid can only be passively regulated by the temperature regulator, and the passive regulation is realized by matching the inherent characteristics (refer to QC/T29061, 4.1-4.9 characteristic requirements) of the temperature regulator with a valve regulating mechanism.
In order to meet the VI emission regulations of China, the technology of the internal combustion engine is upgraded, and the limitation of passive adjustment of the traditional wax type thermostat needs to be overcome in the aspect of coolant temperature control so as to realize a wider adjustment range. An electrically heated thermostat that uses a vehicle-mounted power supply for heating intervention is widely used in internal combustion engines that meet national VI emissions.
The traditional electric heating type thermostat only intervenes in the inherent characteristics of the thermostat, and simply speaking, the heating degree of paraffin of a heating rod element in the thermostat is controlled by adjusting the output voltage of a vehicle-mounted power supply, so that the lift range of the thermostat under the condition of specific cooling liquid temperature is changed. In terms of valve actuating mechanisms, the design of conventional wax thermostats (i.e. the use of a disc valve structure) continues to be used.
Because the disc valve needs to bear the acting force of the main spring, the acting force is unevenly distributed on the contact surface of the disc valve (the coil flat spring is in line contact, and the grinding flat spring is in crescent surface contact); meanwhile, the impact force of water flow on the disc valve is not uniform in the opening process of the disc valve, so that the diameter of the disc valve cannot be too large if the flow of the disc valve is regulated stably. The common practice is to arrange a plurality of identical thermostats to complement the problem of limited flow regulation capacity (there is a design scheme using a pressure balance type thermostat, but the leakage amount is too large to meet the requirement of rapid temperature rise in the cold start stage of the internal combustion engine). In a high-power internal combustion engine, in order to meet the requirement of large flow regulation, more than 2 identical thermostats are usually arranged in a thermostat housing, which increases the matching difficulty of a cooling system and seriously affects the reliability and the cost of the system.
Although the inherent characteristics of the temperature regulator can be actively changed by the design and the design cooperation, a wider temperature control interval is realized, the flow regulating capacity in the temperature interval after the temperature is widened is still limited by the structure of the disc valve, the adjustable flow is too small, and finally the flow regulating capacity of the cooling liquid cannot meet the requirement of the new technology development of the internal combustion engine.
Disclosure of Invention
In order to solve the problems, the invention provides an electric heating type thermostat for an internal combustion engine, which changes the traditional disk valve into a spherical valve and has wider flow regulation capability; a crank slider structure is introduced to convert the linear motion of the temperature sensing element into the rotary motion of the ball valve, so that the linkage of the ball valve and the temperature sensing element is realized.
The technical scheme adopted by the invention is as follows: an electric heating type thermostat for an internal combustion engine comprises a base, a temperature sensing element connected with electric heating, a cover body and a ball valve arranged in the cover body,
one end of the temperature sensing element is arranged on the base through a spring, and the other end of the temperature sensing element is provided with a sleeve; the sleeve is movably arranged on the base; the sleeve is provided with a waist-shaped hole;
the ball valve is provided with a first liquid port and a second liquid port which are communicated with each other, and the ball valve is provided with a connecting rod matched with the waist-shaped hole;
when the engine is cold started, a first liquid port and a second liquid port of the ball valve are communicated with a liquid inlet and a small circulation liquid outlet, cooling liquid from an engine water jacket enters the ball valve through the liquid inlet and then directly returns to the water pump through the small circulation liquid outlet to form small circulation of the engine; at the moment, the connecting rod is positioned at one end of the waist-shaped hole;
when the temperature of the cooling liquid rises or a heating signal of the vehicle-mounted power supply is sensed, the temperature sensing element expands when heated to drive the sleeve to move linearly, the connecting rod moves to the other end from one end of the waist-shaped hole, the ball valve rotates in the cover body, the first liquid port and the second liquid port are gradually cut off from the liquid inlet and the small circulation liquid outlet, the small circulation pipeline is gradually closed and is gradually communicated with the liquid inlet and the large circulation liquid outlet to form the engine large circulation.
Preferably, the sleeve is provided on a flange at the tip of the temperature sensing element.
Furthermore, the end part of the connecting rod passes through the waist-shaped hole and abuts against the upper end face of the temperature sensing element flange.
Preferably, the ball valve is connected with the cover body through a rotating shaft.
Furthermore, the rotating shaft is arranged on a central symmetry axis of the ball valve, and the connecting rod and the rotating shaft are arranged in parallel and eccentrically.
The beneficial effects obtained by the invention are as follows:
1. and (3) flow regulation: when the temperature regulator is required to regulate larger flow, the diameter of a ball valve in the temperature regulator can be enlarged, and at the moment, the acting force of water flow on the ball valve is applied to the spherical surface, the acting force can be always concentrated towards the center of the sphere, so that the influence of the acting force of water flow on the stress oscillation in the opening process of the ball valve is weakened; if the barrel-shaped valve is changed, the water flow acting force is always applied to the axis of the barrel shape, and the influence of the water flow acting force on the opening process of the valve can be weakened. Compared with the traditional disc valve, the 2 valve structures have the inherent structural advantages that the influence of water flow impact is small in the opening and closing processes of the valve;
2. and (3) reliability: the combination of the temperature sensing element of the temperature regulator and the crank sliding block mechanism improves the stress condition of the temperature sensing element. The disc valve is usually disposed on a temperature sensing element, and the temperature sensing element is under high temperature condition, besides receiving the action force of a spring, also receiving the impact force of water flow. The stress of the temperature sensing element directly influences the service life of the thermostat. In the new structure, the temperature sensing element is not only required to bear the acting force of the spring but also only required to bear the friction force caused by the rotation of the ball valve, if the sealing element of the ball valve has excellent low friction, the stress condition of the temperature sensing element is greatly improved, and the service life of the thermostat is greatly prolonged;
3. flow resistance: when water flows through the thermostat, the flow resistance mainly comes from the shielding of the disc valve. When the ball valve is used, the flow resistance can be obviously reduced, which is beneficial to reducing the power loss of the water pump, thereby improving the efficiency of the internal combustion engine.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure when the large cycle is not fully on;
FIG. 3 is a schematic view of the structure when the macro-cycle is fully on;
FIG. 4 is a schematic structural view of the sleeve;
FIG. 5 is a cross-sectional view of the sleeve;
FIG. 6 is a schematic diagram of a small cycle;
FIG. 7 is a schematic diagram of a large cycle;
reference numerals: 1. a base; 2. a temperature sensing element; 3. a sleeve; 4. a spring; 5. a cover body; 51. a liquid inlet; 52. a small circulation liquid outlet; 53. a large circulation liquid outlet; 6. a ball valve; 61. A first fluid port; 62. a second fluid port; 7. a connecting rod; 8. a rotating shaft; 9. an electrical heating rod; 10. And (4) a vehicle-mounted power supply.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments.
As shown in fig. 1, an electric heating type thermostat for an internal combustion engine comprises a base 1, a temperature sensing element 2, a cover 5 and a ball valve 6, wherein the temperature sensing element 2 is a traditional wax type temperature sensing element, the lower end of the temperature sensing element is arranged on the base 1 through a spring 4, and the top end of the temperature sensing element is provided with a sleeve 3; the sleeve 3 is movably arranged on the base 1 and can vertically move up and down together with the temperature sensing element 2. Referring to fig. 4, a kidney-shaped hole 31 is formed in the sleeve 3, the ball valve 6 is disposed in the cover 5, and the ball valve 6 is connected to the kidney-shaped hole 31 of the sleeve 3 through the connecting rod 7. When the temperature sensing element 2 is heated and expanded, the temperature sensing element 2 drives the sleeve 3 on the temperature sensing element to vertically move up and down, the connecting rod 7 moves from one end of the kidney-shaped hole 31 to the other end, and meanwhile, the ball valve 6 is driven to rotate in the cover body 5. The temperature sensing element 2, the sleeve 3, the connecting rod 7, the ball valve 6 and the cover 5 are combined into a crank-like structure, and the linear motion of the temperature sensing element 2 and the sleeve 3 is converted into the rotary motion of the ball valve 6.
Referring to fig. 2 and 3, the cover 5 is provided with a liquid inlet 51, a small circulation liquid outlet 52 and a large circulation liquid outlet 53, and the ball valve 6 is provided with a first liquid port 61 and a second liquid port 62 which are communicated with each other. When the ball valve 6 rotates in the housing 5, the first liquid port 61 and the second liquid port 62 are switched among the liquid inlet 51, the small-circulation liquid outlet 52, and the large-circulation liquid outlet 53, that is: the engine coolant passage is switched between the engine coolant passage for the small cycle and the engine coolant passage for the large cycle.
As shown in fig. 1, when the engine is cold started, a first liquid port 61 and a second liquid port 62 of the ball valve 6 communicate a liquid inlet 51 with a small circulation liquid outlet 52, and cooling liquid from the engine water jacket enters the ball valve 6 through the liquid inlet 51 and then directly returns to the water pump through the small circulation liquid outlet 52 to form small circulation of the engine; at this time, the connecting rod 7 is at one end of the kidney hole 31.
As shown in fig. 2, when the temperature of the coolant rises or a heating signal of the vehicle-mounted power supply 10 is sensed, the temperature sensing element 2 expands due to heating and drives the sleeve 3 to move linearly, the connecting rod 7 moves from one end of the kidney-shaped hole 31 to the other end, the ball valve 6 rotates in the cover body 5, the first liquid port 61 and the second liquid port 62 are gradually staggered from the liquid inlet 51 to the small circulation liquid outlet 52, the small circulation pipeline is gradually closed, the first liquid port 61 and the second liquid port 62 gradually communicate the liquid inlet 51 with the large circulation liquid outlet 53, and the engine large circulation is gradually opened. As shown in fig. 3, when the connecting rod 7 moves to the end of the other end of the kidney-shaped hole 31, the first liquid port 61 and the second liquid port 62 are completely staggered from the liquid inlet 51 and the small circulation liquid outlet 52, the small circulation pipeline is completely closed, the first liquid port 61 and the second liquid port 62 completely communicate the liquid inlet 51 and the large circulation liquid outlet 53, and the engine large circulation is completely opened.
Referring to fig. 4 and 5, the sleeve 3 is disposed on the flange at the top end of the temperature sensing element 2, the central hole 32 of the sleeve 3 is sleeved on the flange at the top end of the temperature sensing element 2, and the lower end orifice of the central hole 32 is contracted inwards to clamp the lower end surface of the flange of the temperature sensing element 2; the end of the connecting rod 7 passes through the waist-shaped hole 31 and is just abutted against the upper end face of the flange of the temperature sensing element 2. The positioning and mounting of the sleeve 3 on the temperature-sensitive element 2 is achieved.
The ball valve 6 is connected with the cover body 5 through a rotating shaft 8. The ball valve 6 rotates within the housing 5 about a rotation axis 8. In this embodiment, the rotating shaft 8 is disposed on the central symmetry axis of the ball valve 6, and the connecting rod 7 is disposed parallel to and eccentrically to the rotating shaft 8.
In this embodiment, the base 1 and the cover 5 may be designed integrally.
With reference to fig. 6 and 7, the principle of the present invention is:
when the engine is cold started, the ball valve 6 in the thermostat seals the outlet to one end of the radiator. At this time, the cooling liquid from the engine water jacket directly returns to the water pump through a through hole in the center of the ball valve 6, and small circulation of the engine is formed.
When the temperature of the cooling liquid rises or a heating signal of the vehicle-mounted power supply 10 is sensed, the ball valve 6 in the thermostat rotates under the driving of the temperature sensing element and the crank mechanism, so that an outlet leading to one end of the radiator is gradually opened, a small circulation pipeline leading to the water pump is gradually closed, and the large circulation of the engine is formed.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An electric heating type thermostat for an internal combustion engine comprises a base, a temperature sensing element connected with electric heating, a cover body and a ball valve arranged in the cover body,
one end of the temperature sensing element is arranged on the base through a spring, and the other end of the temperature sensing element is provided with a sleeve; the sleeve is movably arranged on the base; the sleeve is provided with a waist-shaped hole;
the ball valve is provided with a first liquid port and a second liquid port which are communicated with each other, and the ball valve is provided with a connecting rod matched with the waist-shaped hole;
when the engine is cold started, a first liquid port and a second liquid port of the ball valve are communicated with a liquid inlet and a small circulation liquid outlet, cooling liquid from an engine water jacket enters the ball valve through the liquid inlet and then directly returns to the water pump through the small circulation liquid outlet to form small circulation of the engine; at the moment, the connecting rod is positioned at one end of the waist-shaped hole;
when the temperature of the cooling liquid rises or a heating signal of the vehicle-mounted power supply is sensed, the temperature sensing element expands when heated to drive the sleeve to move linearly, the connecting rod moves to the other end from one end of the waist-shaped hole, the ball valve rotates in the cover body, the first liquid port and the second liquid port are gradually cut off from the liquid inlet and the small circulation liquid outlet, the small circulation pipeline is gradually closed and is gradually communicated with the liquid inlet and the large circulation liquid outlet to form the engine large circulation.
2. The electrically heated thermostat for an internal combustion engine according to claim 1, characterized in that: the sleeve is arranged on a flange at the top end of the temperature sensing element.
3. The electrically heated thermostat for an internal combustion engine according to claim 2, characterized in that: the sleeve is arranged on a flange at the top end of the temperature sensing element, a central hole of the sleeve is sleeved on the flange at the top end of the temperature sensing element, and a lower end orifice of the central hole is contracted inwards to clamp the lower end surface of the flange of the temperature sensing element; the end of the connecting rod is passed through the kidney-shaped hole and is just abutted against the upper end face of the temperature sensing element flange.
4. The electrically heated thermostat for an internal combustion engine according to claim 1, characterized in that: the ball valve is connected with the cover body through a rotating shaft.
5. The electrically heated thermostat for an internal combustion engine according to claim 4, characterized in that: the rotating shaft is arranged on a central symmetrical shaft of the ball valve, and the connecting rod and the rotating shaft are arranged in parallel and eccentrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614832.8A CN111794847A (en) | 2020-06-30 | 2020-06-30 | Electric heating type thermostat for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010614832.8A CN111794847A (en) | 2020-06-30 | 2020-06-30 | Electric heating type thermostat for internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN111794847A true CN111794847A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010614832.8A Pending CN111794847A (en) | 2020-06-30 | 2020-06-30 | Electric heating type thermostat for internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562399A (en) * | 2022-03-10 | 2022-05-31 | 中国人民解放军69246部队 | Vehicle remote start control system and preheating device thereof |
-
2020
- 2020-06-30 CN CN202010614832.8A patent/CN111794847A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562399A (en) * | 2022-03-10 | 2022-05-31 | 中国人民解放军69246部队 | Vehicle remote start control system and preheating device thereof |
| CN114562399B (en) * | 2022-03-10 | 2023-10-13 | 中国人民解放军69246部队 | Remote starting preheating device for vehicle |
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