WO2008151462A1

WO2008151462A1 - Temperature regulator for internal combustion engine

Info

Publication number: WO2008151462A1
Application number: PCT/CN2007/001838
Authority: WO
Inventors: Guosheng Liang; Xiao Liang
Original assignee: Guosheng Liang; Xiao Liang
Priority date: 2007-06-11
Filing date: 2007-06-11
Publication date: 2008-12-18

Abstract

A temperature regulator for internal combustion engine, wherein a cooling water outlet (7) is provided on a side wall of a tubular type rotor (6) in a three-way valve body (1). The cooling water outlet (7) communicates with a bigger circulating water outlet (8) and a smaller circulating water outlet (5) of the valve body (1) respectively during rotation of the rotor. One end of a rotor shaft (16) is fixed to the top of the rotor. Another end of the rotor shaft cooperates with a step motor (2) through a reducer (22). The valve body of the temperature regulator is connected to the body of the combustion engine through a bottom flange (19). Thetemperature regulator can improve the response speed of the regulator and ensure that the cooling water switches between the major cycle and the minor cycle upon reaching the optimum temperature. The regulator also solves the problem that the valve shuts off incompletly.

Description

Internal combustion engine temperature controller

The invention belongs to the technical field of engine accessory components.

Background technique

Internal combustion engine operating temperature overheated parts reduce strength, engine oil becomes turbulent, parts wear increases, and ultimately lead to an overall decline in the power, economy, reliability and durability of internal combustion engines. If the operating temperature of the internal combustion engine is too low, the heat loss and friction loss will increase, the wear of the parts will increase, the emissions will deteriorate, the internal combustion engine will be rough, the power will drop, and the fuel consumption rate will increase. The optimum operating temperature of the internal combustion engine is 85Ό~95Ό (the high temperature engine is II0°C-1L5°C). Until the internal combustion engine is working in the atmospheric natural ambient temperature, the actual working temperature is not in the optimal working temperature range. When the ambient temperature is high, the internal combustion engine works with the thermostat installed, and the actual working temperature is higher than the optimal temperature range, causing the boiling. If the thermostat is removed, the operating temperature of the internal combustion engine is lower than the best. Operating temperature range; When the ambient temperature is low, the operating temperature is lower than the optimal operating temperature range regardless of whether the internal combustion engine is equipped with a thermostat. Common methods for adjusting the operating temperature of water-cooled internal combustion engines include: installing a water pump, a cooling fan (or a silicone oil fan clutch, or an electric fan, etc.), a radiator, a thermostat, a blind, and adding insulation on the forced water cooling circulation system. Being waited for. After I invented a water-cooled internal combustion engine temperature controller, I invented the internal combustion engine temperature controller, which solves the problem of regulating the internal combustion engine. There has been significant progress in temperature, especially since the latter has been made up to make up for the shortcomings of the former scheme. From the perspective of achieving product durability and safety, the latter also has the following shortcomings in the structural design:

1. The large cycle of completely cutting off the cooling water is realized by completely contacting the outer circumferential surface of the main flap of the temperature controller with the main body wall of the valve body, and whether the outer circumferential surface of the main flap is completely in contact with the main wall of the regulating body, Depending on when the limit switch sends a shutdown signal. The closing signal from the limit switch is early, the outer circumferential surface of the main flap is not in contact with the main body wall of the valve body, and there are different degrees of gap between the two, so that the main flap cannot completely cut off the cooling water and the large circulation. When the internal combustion engine starts to heat up slowly, even when the internal combustion engine is working normally, the temperature does not rise, and the internal temperature controller does not work; the limit switch sends a signal late, the outer peripheral surface of the main flap and the main body wall of the valve body Has achieved full erosion, the main flap can not continue to squat, and the MCU can not detect the closing signal from the limit switch, the microcontroller will not be able to send the motor to stop working instructions, at this time the motor continues to work, thereby reducing Step motor life, easy to burn the motor. If the main flap can be completely contacted with the main body wall of the valve body, the closing signal is the same as that of the limit switch, but it will also be caused by the outer circumferential surface of the main flap and the main body wall of the valve body. This occurs when the wear of the limit switch is not synchronized. The cooperation between the limit switch and the main flap and the main body wall of the valve body has no automatic compensation function, which determines that the invention cannot completely and completely achieve the purpose of optimally controlling the operating temperature of the internal combustion engine.

2. The partition of the cooling water between the valve body cavity and the reduction gear box is realized by the sealing rubber ring on the main and auxiliary flap shafts. However, due to the long-term rotation of the main and auxiliary flap shafts, the rubber ring is worn out, and the cooling water enters the reduction gear box under different pressures generated by the water pump. The limit switch in the reduction gear box is damaged, and on the other hand, the cooling of the internal combustion engine is affected by the loss of cooling water.

In summary, the durability, safety and service life of the inventive technology have certain limitations.

3. The large and small circulation of cooling water is driven by the worm wheel to drive the synchronous gear set, and then the main and auxiliary flap shafts are rotated to control the opening and closing of the main and auxiliary flaps, so the structure is cumbersome.

Summary of the invention

The purpose of the invention is:

An internal combustion engine temperature controller is provided to precisely control the flow of cooling water through the radiator, and the performance is safe, reliable, and durable. The internal combustion engine is always operated at the optimum working temperature, so that the fuel supplied to the combustion chamber is optimally atomized, and the combustion is sufficient to maximize the power of the internal combustion engine. Achieve fuel saving, reduce exhaust emissions, and extend the life of the internal combustion engine.

The technical solution of the present invention is:

The side wall of the cylindrical rotor installed in the three-way valve body is provided with a cooling water outlet. When the rotor rotates, the cooling water outlet can communicate with the large circulating water outlet of the valve body and the small circulating water outlet of the valve body, and the rotor top end and the rotor shaft are respectively connected. One end is fixedly connected, and the other end of the rotor shaft is coupled with the stepping motor through a speed reducer.

The temperature sensor, the stepping motor, and the limit switch are respectively electrically connected to the microcomputer control box. The other end of the worm has a manual safety knob.

The utility model has the beneficial effects that - instead of the existing paraffin wax control main and auxiliary valve conversion, the main and auxiliary thermostats are solved. The inertia problem of valve switching; the cooling water can be used for the purpose of large and small cycle conversion when the working temperature of the internal combustion engine reaches the optimal temperature, and the internal combustion engine works in a high temperature climate environment, and the cooling water can be converted in a timely manner. The internal combustion engine is prevented from being opened; the invention solves the problem that the thermostat valve is not tightly closed, and realizes a complete large circulation of the cooling water, and the cooling water does not leak into the radiator when the small cycle is performed, and the large and small circulation circuit cooling water The amount of flow varies with the temperature of the water.

It can completely control the flow of cooling water through the radiator, so that the internal combustion engine can always operate at the optimal working temperature, so that the fuel supplied to the combustion chamber is optimally atomized, the combustion is sufficient, the engine power output is maximized, and fuel is saved. Reduce exhaust emissions, extend engine life, and be safe, reliable, and durable.

DRAWINGS

1 is a schematic structural view of a temperature control valve of an internal combustion engine of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1 of the present invention;

Figure 3 is a plan view of Figure 1 of the present invention;

Figure 4 is a cross-sectional view taken along line B-B of Figure 3 of the present invention;

Figure 5 is a circuit diagram of a temperature controller of an internal combustion engine of the present invention;

Figure 6 is a schematic view showing the connection of the internal combustion engine temperature controller and the internal combustion engine cooling system of the present invention;

Figure 7 is a schematic view showing the operation of the small circulating water of the cooling water of Figure 6 of the present invention;

Figure 8 is a schematic view showing the circulation work in the cooling water of Figure 6 of the present invention;

Figure 9 is a schematic view showing the operation of the large circulating water of the cooling water in Figure 6 of the present invention;

detailed description Embodiment 1 The following is a description of the present invention in conjunction with the accompanying drawings - as shown in Figures 1, 2, 3, 4, 5, and 6, 1. Temperature governor three-way wide body, 2. Stepper motor, 3. Standby Interface, 4. Temperature sensor, 5. Small circulation water outlet, 6. Rotor, 7. Rotor cooling water outlet, 8. Large circulation water outlet, 9. Manual safety knob, 10. Worm, 11. Worm gear, 12. Limit Switch, 13. Limit post, 14. Body cap, 15. Worm gear coupling nut, 16. Rotor shaft, 17. Bushing, 18. Mechanical seal, 19. Connecting flange 20. Rotor cavity, 21 Rotor fixing nut, 22. reduction box, 23. 徼 computer control box, 24. temperature display window, 25. temperature setting button, 26. radiator, 27. radiator manifold, 28. internal combustion engine temperature controller Valve, 29. Body cooling water jacket, 30-pump, 31. Body, 32. Radiator return pipe, 33. Small circulation return pipe _β

A temperature sensor mounted in the valve body, a rotor mounted in the valve body, and a rotor tip fixed to one end of the rotor shaft. The other end of the rotor shaft is fixed to the worm wheel in the gearbox, and the rotor shaft is connected to the stepping motor through a speed reducer. The reducer is composed of a worm-gear meshing connection, the stern wheel shaft and the rotor shaft are coaxial, one end of the worm is connected with the motor shaft, and the other end has a manual safety knob. The temperature controller body is connected to the internal combustion engine body through the base connecting flange. The large circulation outlet of the threshold body is connected with the water pipe on the radiator, and the small circulation outlet of the valve body is connected with the small circulation return pipe of the internal combustion engine, and the temperature sensor, the motor and the limit switch are respectively electrically connected with the microcomputer control box. During operation, the temperature sensor in the valve body transmits the cooling water temperature signal to the computer controller. The microcomputer controller calculates the data according to the temperature signal and then commands the motor to work, drives the worm to rotate, and drives the worm wheel to rotate. The worm wheel shaft and the rotor shaft are coaxial, and the worm wheel is rotated in the same direction with the rotor, and the angle of the rotor rotation changes with the water temperature. In order to make the rotor cooling water outlet switch to coincide with the large circulation outlet of the valve body, the rotor side wall completely closes the valve body small circulation water outlet, and the cooling water of the body is large and the small circulation loop realizes complete control, which is different in height. Under ambient temperature, the internal combustion engine can operate at the optimum ideal operating temperature range. The technology completes the large and small circulation control of the cooling water by the rotation of the rotor, and the deceleration and transmission are completed by using a pair of worm gears and a rotor shaft, so that the structure of the internal combustion engine temperature controller is simpler and the working performance is more stable.

The valve body (1) of the internal combustion engine temperature controller is a three-way body. It can also be made into a four-way body. One of the channels is a backup interface for other purposes (3). If it can be connected to a hurricane, it can be blocked when not in use. The valve body is a cavity with a rotor (6) inside. One end of the rotor shaft (16) is fixed to the rotor (6) by a fixing nut (21), and the other end passes through a mechanical seal (18) and a bushing (17) on the valve body, and passes through the reduction gear box (22). The fixed joint mother (15) is fixed to the worm gear (U). The gearbox is also equipped with a worm (10), a rat position switch (12) and a limit post (13) that are meshed with the worm gear. The motor (2) is fixed at one end of the gearbox (22), and the motor shaft is coaxial with the worm (10). The other end of the worm (10) has a manual safety knob (9).

The rotational limit position of the rotor is determined by the limit switch (12) and the limit post (13). The limit switch (12) is fixed on the upper cover (14) of the valve body, and the limit post (13) is fixed on the worm gear (11). A temperature sensor (4) is installed between the valve body connecting flange (19) and the skirt of the rotor (6). The temperature sensor (4), the stepping motor (2), the limit switch (12), and the power cord are electrically connected to the microcomputer control box (23). The microcomputer control box (23) has an internal combustion engine operating temperature setting button (25) and an operating temperature display window (24).

The internal combustion engine temperature controller regulates the cooling water temperature process - the temperature sensor (4) will collect the cooling water temperature signal and the set internal combustion in the temperature controller body (1) The motive working temperature signal is transmitted to the microcomputer control box (23), and the information processing is performed by the computer, and the stepping motor (2) is instructed to work, and the rotor (10) is driven by the transmission system worm (10 worm wheel (11), rotor shaft (16)) The reciprocating rotation, the limit position of the rotor rotation, is completely controlled by the limit switch (12) and the limit column (13), and can be automatically compensated. When the temperature of the cooling water in the internal combustion engine body is lower than the set temperature, this time The rotor cooling water outlet (7) in the temperature controller valve body is completely switched to the small circulating water outlet (5) on the valve body, and the large circulating water outlet (8) on the valve body is completely sealed by the side wall of the rotor (6). Live, all the cooling water flows through the small circulating water outlet (5). The circulating water circuit is: Water pump (30) ~~ fl body cooling water jacket (29) - 3⁄4 sub cooling water outlet (7) - small circulating water outlet (5)——Small circulation return pipe (33)—Pump (30), called small circulation circuit (Fig. 7). When the cooling water temperature in the internal combustion engine body exceeds the set temperature, the rotor cooling water outlet in the temperature controller valve body (7) Turn to the large circulating water outlet on the valve body (8) Correspondingly, the small circulating water outlet (5) on the valve body is completely sealed by the side wall of the rotor (6), and the cooling water flows through the large circulating water outlet (8). The circulating water circuit is: 7 pump (30)—— a body cooling water jacket (29) - a rotor cooling water outlet (7) ~ - "large circulation water outlet (8) - radiator inlet pipe (27) - radiator (26) 3⁄4 heater return pipe (32 )——Water pump (30), called large circulation circuit (Fig. 9). When the temperature of cooling water in the internal combustion engine body reaches or equals the set temperature, the rotor cooling water outlet (7) in the temperature controller valve body is turned to small circulation. Between the nozzle (5) and the large circulating water outlet (8), a part of the cooling water flows out from the small circulating water outlet (5), and a part of the cooling water flows out from the large circulating water outlet (8), the two parts, the flow distribution, by the body The temperature of the cooling water inside is determined by the change of the temperature of the cooling water. The circulating water circuit passes through the large circulation loop and the small circulation loop at the same time. (Figure 8). Once the internal control engine temperature controller is out of control, it can be converted into manual control. Turn the manual safety knob (9) at one end of the worm (10) to mechanically adjust the rotation angle of the rotor cooling water outlet (7) through the transmission system. Large and small circulating water for cooling water

Claims

Claim

1. An internal combustion engine temperature controller, characterized in that: a cooling water outlet is opened on a side wall of a cylindrical rotor installed in a three-way valve body, and a cooling water outlet of the rotor can rotate with a large circulation outlet of the valve body respectively when the rotor rotates And the wide-body small circulation water outlet is connected, the top end of the rotor is fixedly connected with one end of the rotor shaft, and the other end of the rotor shaft is matched with the stepping motor through a reducer.

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2. An internal combustion engine temperature controller according to claim 1, wherein the temperature sensor, the stepping motor, and the limit switch are electrically connected to the microcomputer control box, respectively.

3. An internal combustion engine temperature controller according to claim 1 wherein - the other end of the worm has a manual safety knob.