CN212774489U

CN212774489U - Multistage flow control valve for commercial vehicle

Info

Publication number: CN212774489U
Application number: CN202021840713.6U
Authority: CN
Inventors: 李干明; 于秀娟
Original assignee: DONGFENG FUJI THOMSON THERMOSTAT CO LTD
Current assignee: DONGFENG FUJI THOMSON THERMOSTAT CO LTD
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-03-23
Anticipated expiration: 2030-08-28

Abstract

The invention relates to a multi-stage flow control valve for a commercial vehicle, which comprises a cover body, wherein two sets of temperature regulators are arranged on the cover body, and each set of temperature regulator is provided with an electric control heating device; the flow of the cooling liquid of each interface can be controlled according to the temperature of the cooling liquid of the engine; or the flow of the cooling liquid of each interface is controlled according to whether the electric control heating device heats the corresponding temperature sensing element or not when the electric control system is powered off and on. The invention has the characteristics of compact structure and high integration. Two inductors are integrated inside, and the dual functions of small circulation of an engine cooling system and circulation of a heat dissipation system are realized. The multi-stage flow control valve can realize rapid temperature rise during cold start, integrates various different working modes, and realizes energy conservation and emission reduction when an engine runs in a high-temperature mode under partial load; when the engine is at high speed and high load, the engine runs in a low-temperature mode, so that overheating of the engine is prevented, knocking of the engine is reduced, and the service life of the engine is prolonged.

Description

Multistage flow control valve for commercial vehicle

Technical Field

The invention relates to the technical field of vehicle cooling systems, in particular to a multi-stage flow control valve for a commercial vehicle.

Background

In the working process of the engine, the temperature of gas in the cylinder reaches 1800-2000 ℃ due to the combustion of the combustible mixed gas. Parts such as a cylinder body, a cylinder cover and a piston which are in direct contact with high-temperature gas, if cooling is not timely or cooling is insufficient, parts can be accelerated to wear due to poor lubrication, and the power of an engine is reduced due to reduction of the air charging quantity of a cylinder and abnormal combustion; however, excessive cooling increases the viscosity of the engine oil and affects lubrication, and at the same time, takes away a large amount of heat, resulting in a decrease in thermal efficiency. Therefore, the engine needs to operate in a more appropriate temperature range.

To meet this requirement, a wax type thermostat is usually installed at the water inlet or outlet of the engine thermal management system, and the thermostat can change the flow rate and flow direction of the large and small circulation according to the water temperature at the installation position, so as to keep the water temperature of the engine within a set range. However, the wax type temperature regulator has the problems of low starting sensitivity, delay in the temperature reduction process and the like, so that a large amount of safety space needs to be reserved between the highest temperature controlled by the wax type temperature regulator and the upper limit working temperature of the system, the water temperature fluctuation range is large, and the energy conservation and emission reduction are not facilitated.

Disclosure of Invention

In order to solve the problems, the invention provides a multi-stage flow control valve for a commercial vehicle, which can be opened by switching a valve through the water temperature change and working condition calibration of engine coolant so as to realize the optimal effect of energy conservation and emission reduction.

The technical scheme adopted by the invention is as follows: the utility model provides a multistage flow control valve for commercial vehicle, includes the cover body, its characterized in that: the cover body is provided with three interfaces, namely a first interface, a second interface and a third interface, wherein the first interface is communicated with a water outlet of engine cooling liquid, the second interface is communicated with a water inlet of a radiator, and the third interface is communicated with a small cycle of the engine; two sets of temperature regulators with the same structure are arranged in the cover body, and both the two sets of temperature regulators comprise temperature sensing elements; the two temperature sensing elements sense the change of the water temperature of the engine cooling liquid and drive the valve of the temperature regulator to move, so that the flow regulation of the engine cooling liquid at the corresponding valve is realized.

Preferably, the temperature sensing elements of the two sets of the temperature regulators are made of the same expansion material, and the valves of the two sets of the temperature regulators are opened simultaneously.

Preferably, the temperature sensing elements of the two sets of the temperature regulators are made of different expansion materials, and the valves of the two sets of the temperature regulators are opened sequentially.

Preferably, both sets of thermostats comprise an electrically controlled heating device.

Preferably, the electric control heating device comprises a wire harness connector and a heating element connected with the wire harness connector, the wire harness connector is connected with the cover body through threads, and an O-shaped ring is arranged between the wire harness connector and the cover body; the heating member is in contact with a temperature sensing element of the thermostat.

Preferably, two cavities, namely an upper cavity and a lower cavity, are arranged in the cover body; the upper chamber is communicated with the second interface, and the lower chamber is communicated with the third interface; the temperature regulator is arranged between the upper chamber and the lower chamber, and the first interface is arranged at the bottom of the temperature regulator; and a valve of the thermostat moves between the upper chamber and the lower chamber, and the flow of the engine coolant flowing through the second interface or the third interface through the first interface is gradually changed.

Furthermore, a support frame is arranged at the first interface, is fixed with the cover body and is positioned in the lower chamber; the upper end of the supporting pad is abutted against a flange table between the upper chamber and the lower chamber, and the lower end of the supporting pad is abutted against the upper end face of the supporting frame; the water seal ring is arranged between the side wall of the valve and the supporting pad.

Furthermore, the side wall of the support frame is provided with a through hole communicated with the lower chamber through a first interface.

Furthermore, the two sets of temperature regulators respectively comprise a temperature sensing element, a spring and a valve, wherein the upper end of the spring is in contact with the bottom of the valve, and the lower end of the spring is abutted against the supporting frame; the upper end of the temperature sensing element is fixed with the valve, and the lower end of the temperature sensing element penetrates through the inner hole of the spring and is inserted into the inner hole at the bottom of the support frame.

Preferably, a sealing ring is arranged at the communication position of the first interface and a water outlet of the engine coolant.

The beneficial effects obtained by the invention are as follows: two sets of temperature regulators are arranged on the cover body, and each set of temperature regulator is provided with an electric control heating device (a wire harness joint); the cover body is provided with three interfaces, one interface is connected with the water outlet of the engine, the other interface is connected with the radiator, and the other interface is connected with the small cycle of the engine; the valve can control the flow of cooling liquid of each interface according to the temperature of the cooling liquid of the engine; or the flow of the cooling liquid of each interface is controlled according to whether the electric control heating device heats the corresponding temperature sensing element or not when the electric control system is powered off and on.

The invention has the characteristics of compact structure and high integration. Two inductors are integrated inside, and the dual functions of small circulation of an engine cooling system and circulation of a heat dissipation system are realized. The multi-stage flow control valve can realize rapid temperature rise during cold start, and integrates various different working modes, and the engine runs in a high-temperature mode during partial load, thereby realizing energy conservation and emission reduction; when the engine is at high speed and high load, the engine runs in a low-temperature mode, so that overheating of the engine is prevented, knocking of the engine is reduced, and the service life of the engine is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic diagram of a small circulation channel structure according to the present invention;

FIG. 4 is a schematic view of the installation of the thermostat and the support frame;

FIG. 5 is a diagram of the initial state of the thermostat;

in the figure: 1. a cover body; 11. a first interface; 12. a second interface; 13. a third interface; 14. an upper chamber; 15. a lower chamber; 2. an electrically controlled heating device; 3. a thermostat; 31. a temperature sensing element; 32. a valve; 321. a gas release valve; 33. a spring; 4. a support frame; 41. a spring mount; 42. a through hole; 5. a support pad; 51. sealing a ring with water; 6. a seal ring; 7. and an O-shaped ring.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments.

As shown in fig. 1 and 2, the multistage flow control valve for a commercial vehicle of the present invention includes a cover 1, where the cover 1 is provided with three ports, a first port 11, a second port 12, and a third port 13, where: the first interface 11 is communicated with a water outlet of engine coolant (as a water inlet of a control valve), the second interface 12 is communicated with a water inlet of a radiator (as a water outlet of the control valve and connected with a large circulation), and the third interface 13 is communicated with a small circulation of the engine (as another water outlet of the control valve); two sets of thermostats 3 with the same structure are arranged in the cover body 1, the two sets of thermostats 3 can simultaneously sense the engine coolant flowing into the control valve from the first connector 11, and respectively and independently operate (equivalent to being arranged in parallel) to jointly control the flow of the coolant flowing out from the second connector 12 or the third connector 13.

The two sets of temperature regulators 3 comprise temperature sensing elements 31, the two temperature sensing elements 31 can be made of the same expansion material, and when the temperature of the engine coolant changes, valves 32 of the two sets of temperature regulators 3 act simultaneously; of course, the two temperature sensing elements 31 may also be made of different expansion materials, and when the temperature of the engine coolant changes, the valves 32 of the two sets of thermostats 3 act in sequence.

The two sets of temperature regulators 3 respectively comprise an electric control heating device 2, the electric control heating device 2 comprises a wire harness connector and a heating element connected with the wire harness connector, the wire harness connector is connected with the cover body 1 through threads, and an O-shaped ring 7 is arranged between the wire harness connector and the cover body; the heating member is in contact with the temperature sensing element 31 of the thermostat 3. The electric control system is powered off or on, so that whether the electric control heating device heats the corresponding temperature sensing element or not is controlled, and then the two sets of temperature regulators 3 are driven to act, and the flow of the cooling liquid of each interface is controlled.

Referring to fig. 3 and 4, two chambers, namely an upper chamber 14 and a lower chamber 15, are arranged in the cover 1; the upper chamber 14 is communicated with the second port 12, and the lower chamber 15 is communicated with the third port 13; the temperature regulator 3 is arranged between the upper chamber 14 and the lower chamber 15, the first interface 11 is arranged at the bottom of the temperature regulator 3, and the cooling liquid can flow into the temperature regulator 3 through the first interface 11; the valve 32 of the thermostat 3 moves between the upper chamber 14 and the lower chamber 15, and the flow rate of the engine coolant flowing through the second port 12 or the third port 13 via the first port 11 changes stepwise.

A support frame 4 is arranged at the first interface 11, and the support frame 4 is fixed with the cover body 1 and is positioned in the lower cavity 15; a supporting pad 5 and a water seal ring 51 are arranged at the joint of the upper chamber 14 and the lower chamber 15, the upper end of the supporting pad 5 is abutted against a flange table formed between the upper chamber 14 and the lower chamber 14, and the lower end is abutted against the upper end surface of the supporting frame 4; the water seal ring 51 is disposed between the side wall of the valve 32 and the support pad 5. A through hole 42 is formed in the side wall of the support frame 4, and the first connector 11 is communicated with the lower chamber 14. When the valve 32 moves linearly up and down along the guide structure on the support frame 4, the valve 32 gradually cuts off or opens the through hole 42 to control the flow of the cooling liquid entering the small circulation; meanwhile, the top of the valve and the cover body are gradually close to or separated from each other, and the flow of the cooling liquid entering the radiator (large circulation) is controlled.

In this embodiment, the two sets of thermostats 3 each include a temperature sensing element 31, a spring 33 and a valve 32, the upper end of the spring 33 contacts with the bottom of the valve 32, the lower end of the spring 33 abuts against a spring mounting seat 41 at the bottom of the support frame 4, the spring mounting seat 41 is a hollow cylindrical structure, and the lower end of the spring 33 is inserted into the root from the outer wall of the cylinder; the upper end of the temperature sensing element 31 is fixed with the valve 32, and the lower end passes through the inner hole of the spring 33 and is inserted into the inner hole of the spring mounting seat 41.

In this embodiment, a sealing ring 6 is disposed at a communication position between the first port 11 and a water outlet of the engine coolant, and an air release valve 321 is disposed on a sidewall of the valve 32.

The working principle of the invention is as follows: when the temperature of the engine cooling liquid is lower, the engine cooling liquid flows into the engine for small circulation through the control valve and circulates in the engine, so that the engine is quickly heated; when the temperature of the engine coolant is higher, when the engine coolant passes through the two sets of temperature regulators 3, the valves of the two sets of temperature regulators 3 can be opened simultaneously or sequentially, and the temperature regulation can be realized by setting expansion materials with different opening temperatures.

Along with the continuous rising of the water temperature of the engine, the whole vehicle is calibrated by MAP, the electric control heating device 2 is electrified, the temperature of the valve 32 rises under the condition of external forced electrification, the opening degree of the valve 32 is increased, the cooling capacity of the whole vehicle is improved, the water temperature of the engine is reduced, and the engine is ensured to work in a safe temperature range.

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

1. The utility model provides a multistage flow control valve for commercial vehicle, includes the cover body, its characterized in that: the cover body is provided with three interfaces, namely a first interface, a second interface and a third interface, wherein the first interface is communicated with a water outlet of engine cooling liquid, the second interface is communicated with a water inlet of a radiator, and the third interface is communicated with a small cycle of the engine; two sets of temperature regulators with the same structure are arranged in the cover body, and both the two sets of temperature regulators comprise temperature sensing elements; the two temperature sensing elements sense the change of the water temperature of the engine cooling liquid and drive the valve of the temperature regulator to move, so that the flow regulation of the engine cooling liquid at the corresponding valve is realized.

2. The multistage flow control valve for commercial vehicles according to claim 1, characterized in that: the temperature sensing elements of the two sets of the temperature regulators are made of the same expansion material, and the valves of the two sets of the temperature regulators are opened simultaneously.

3. The multistage flow control valve for commercial vehicles according to claim 1, characterized in that: the temperature sensing elements of the two sets of the temperature regulators are made of different expansion materials, and the valves of the two sets of the temperature regulators are opened successively.

4. The multistage flow control valve for commercial vehicles according to claim 1, characterized in that: and the two sets of temperature regulators comprise an electric control heating device.

5. The multistage flow control valve for commercial vehicles according to claim 4, characterized in that: the electric control heating device comprises a wire harness connector and a heating element connected with the wire harness connector, the wire harness connector is connected with the cover body through threads, and an O-shaped ring is arranged between the wire harness connector and the cover body; the heating member is in contact with a temperature sensing element of the thermostat.

6. The multistage flow control valve for commercial vehicles according to claim 1, characterized in that: two cavities, namely an upper cavity and a lower cavity, are arranged in the cover body; the upper chamber is communicated with the second interface, and the lower chamber is communicated with the third interface; the temperature regulator is arranged between the upper chamber and the lower chamber, and the first interface is arranged at the bottom of the temperature regulator; and a valve of the thermostat moves between the upper chamber and the lower chamber, and the flow of the engine coolant flowing through the second interface or the third interface through the first interface is gradually changed.

7. The multistage flow control valve for commercial vehicles according to claim 6, characterized in that: a support frame is arranged at the first interface, is fixed with the cover body and is positioned in the lower chamber; the upper end of the supporting pad is abutted against a flange table between the upper chamber and the lower chamber, and the lower end of the supporting pad is abutted against the upper end face of the supporting frame; the water seal ring is arranged between the side wall of the valve and the supporting pad.

8. The multistage flow control valve for commercial vehicles according to claim 7, characterized in that: the side wall of the support frame is provided with a through hole communicated with the lower chamber through a first interface.

9. The multistage flow control valve for commercial vehicles according to claim 6, characterized in that: the two sets of temperature regulators respectively comprise a temperature sensing element, a spring and a valve, wherein the upper end of the spring is in contact with the bottom of the valve, and the lower end of the spring is abutted against the supporting frame; the upper end of the temperature sensing element is fixed with the valve, and the lower end of the temperature sensing element penetrates through the inner hole of the spring and is inserted into the inner hole at the bottom of the support frame.

10. The multistage flow control valve for commercial vehicles according to claim 1, characterized in that: and a sealing ring is arranged at the communication position of the first interface and the water outlet of the engine coolant.