Multi-point type electronic injection methanol engine and method thereof

Abstract

The invention discloses a multi-point electronic injection methanol engine and a method thereof, and relates to the technical field of engines, the multi-point electronic injection methanol engine comprises an engine body and a methanol pump fixedly mounted on the engine body, and further comprises a preheating system and a heat dissipation system; the preheating system and the heat dissipation system comprise a common water tank fixedly installed on an engine body. The engine has the advantages that when the engine runs, the thermostat is used for controlling water path circulation, a small amount of circulating water and the preheater are used for preheating an engine body, cold start of the engine is avoided, the combustion efficiency of methanol is improved, methanol is combusted more sufficiently, meanwhile, the heating efficiency of water in the preheater is improved in the preheating process, and the energy consumption is reduced. The preheating speed of methanol is increased, the heat storage device is used for absorbing and storing heat on the engine during operation of the engine, the heat is released and used during preheating, energy consumption of the heating module is reduced, and the temperature rising speed of water in the preheater is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to a multi-point electronic injection methanol engine and a method thereof. Background Art

[0002] A methanol engine is an internal combustion engine that uses methanol as the main fuel. Its main advantages include relatively small modifications to the original engine and less environmental pollution to the atmosphere. The methanol injectors of a multi-point electronic injection methanol engine are installed on the intake manifold, and methanol is directly injected into the intake manifold to fully mix with the air in the intake manifold. When the intake valve opens, the mixed gas is sucked into the cylinder for combustion and work. The advantage of multi-point electronic injection lies in its simple structure, relatively low pressure requirements for the injection of methanol injectors, and relatively low requirements for methanol quality. In this way, it is more time-saving and labor-saving for later maintenance, and has relatively high reliability.

[0003] The publication number CN118327827A discloses a fuel preheating system and a preheating method for a marine pure methanol engine, which includes a conventional preheating circulation circuit and a cold start preheating circulation circuit. The preheating circulation circuit includes a secondary heating unit, two electronically controlled three-way valves, a first electric pump, a first filter, and a pressure regulating valve. The cold start preheating circulation circuit includes a primary heating unit, a second filter, two electronically controlled three-way valves, an electronically controlled two-way valve, and a second electric pump. The preheating method includes starting the cold start preheating circulation circuit to warm the cylinder of the marine pure methanol engine, and after the cold start ends, draining the methanol fuel in the primary heating unit and then starting the conventional preheating circulation circuit.

[0004] The above engine uses the high-temperature cooling water at 55 - 70°C after the circulation of the marine pure methanol engine and the heat generated when the ceramic heating rod is energized to preheat the primary heating unit used during cold start, and uses the high-temperature exhaust gas at 60 - 110°C discharged from the marine pure methanol engine to preheat the secondary heating unit during the normal operation of the engine. It makes full use of the waste heat of the circulating cooling water and exhaust gas of the marine pure methanol engine, solves the problems of difficult atomization of methanol fuel, incomplete combustion resulting in reduced combustion efficiency, poor emissions, and instability during the cold start stage. It reduces the energy consumption of methanol fuel atomization, thereby reducing the operating cost of the marine pure methanol engine.

[0005] However, in the specific use of the above-mentioned and existing methanol engines, the preheating system and the cooling system of the engine are the same system. After preheating, it is necessary to cool down the preheating system and then carry out heat dissipation, which affects the heat dissipation efficiency. At the same time, the amount of preheating water is large and the preheating speed is slow. In addition, when using a preheater for preheating, the water flow direction in the preheater is fixed and single, and the heating efficiency of water is low, which will also affect the preheating efficiency.

[0006] Therefore, a new type of multi-point electronic injection methanol engine and a method thereof can be adopted to solve the deficiencies of the prior art. Summary of the Invention

[0007] The object of the present invention is to solve the problem of low preheating efficiency in the prior art, and to propose a multi-point electronic injection methanol engine and its method.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-point electronic injection methanol engine includes an engine body, and also includes a preheating system and a heat dissipation system; The preheating system and the heat dissipation system include a water tank, a thermostat and an electronic water pump which are fixedly installed on the engine body in common. The preheating system further includes a preheater, and the heat dissipation system further includes a radiator for dissipating heat from the water tank. The electronic water pump, the preheater, the methanol pump, the water tank and the engine body are connected through a branch inlet pipe and a branch outlet pipe to form a branch preheating system. A temperature sensor and a controller for controlling the start and stop of the preheater are installed on the engine body; An energy storage heating component which cooperates with the preheater and the water tank is installed on the engine body; The electronic water pump, the thermostat, the engine body and the water tank are connected through a main water pipe to form a heat dissipation system.

[0009] Preferably, the preheater is composed of a methanol pump, a preheated water cylinder and a heating module. The branch inlet pipe is connected to the preheated water cylinder through a water guide pipe. The water in the preheated water cylinder enters the engine body through the branch outlet pipe. The controller controls the operation of the heating module. A heat conduction plate which cooperates with the water inside the preheated water cylinder is installed on the heating module. A flow component which cooperates with the heat conduction plate is installed on the preheated water cylinder.

[0010] Preferably, the flow component includes a piston cylinder fixedly installed inside the preheated water cylinder. A piston disc is slidably installed inside the piston cylinder. A push-pull mechanism which cooperates with the piston disc is installed on the preheated water cylinder. A plurality of one-way pipes are fixedly installed on the piston disc. A one-way outlet pipe is fixedly installed at the end of the piston cylinder. An expansion water inlet is fixedly installed at the end of the one-way outlet pipe.

[0011] Preferably, two partition plates are fixedly installed inside the preheated water cylinder. A plurality of venturi tube bundles are fixedly installed together between the two partition plates.

[0012] Preferably, the push-pull mechanism includes a motor fixedly installed outside the preheating water cylinder. An elliptical plate is fixedly installed on the driving end of the motor. A first telescopic rod is rotatably installed outside the preheating water cylinder through a rotating shaft. The elliptical plate is rotatably connected to the telescopic end of the first telescopic rod. A second hemispherical body is installed on the first telescopic rod through a stroke amplification structure. A first hemispherical body matched with the second hemispherical body is fixedly installed on the piston disc. A support frame is fixedly installed in the preheating water cylinder. A return spring is fixedly installed between the support frame and the piston disc.

[0013] Preferably, the stroke amplification structure includes a shaft rod fixedly installed on the first telescopic rod. The axis of the shaft rod is the same as that of the rotating shaft. An incomplete toothed cylinder is fixedly installed on the shaft rod. A round block is fixedly installed at the bottom of the first telescopic rod. A hole is opened in the round block. A nut is fixedly installed in the hole. A screw rod is rotationally installed on the nut by threads. One end of the screw rod is rotatably connected to the second hemispherical body, and the other end of the screw rod is fixedly installed with a cylinder. A second disc is fixedly installed on the cylinder. A first disc is fixedly installed on the round block. A plurality of elastic telescopic rods are fixedly installed between the first disc and the second disc.

[0014] Preferably, a second telescopic rod is fixedly installed on the round block. The bottom of the second telescopic rod is rotatably connected to the preheating water cylinder.

[0015] Preferably, the energy storage and heating assembly includes a heat storage device fixedly installed on the engine body. The heat storage device absorbs and stores the heat energy on the engine body. An oil pump is fixedly communicated with the heat storage device. A preheating oil cylinder is fixedly installed outside the preheating water cylinder. An oil inlet pipe and an oil outlet pipe are communicated with the preheating oil cylinder. The oil inlet pipe is communicated with the heat storage device, and the oil outlet pipe is communicated with the oil pump.

[0016] Preferably, a spiral blade is rotatably installed outside the preheating water cylinder. A toothed disc is fixedly installed on the driving end of the motor. An internal toothed ring meshed with the toothed disc is fixedly installed on the spiral blade.

[0017] The present invention also provides a method for operating a multi-point electronic injection methanol engine, including the above multi-point electronic injection methanol engine, and further including the following steps: S1. Preheating: The controller determines whether heating is required according to the value of the temperature sensor. If heating is required, the controller controls the preheater to start and starts the electronic water pump. At this time, the thermostat is in the closed state, closing the water circuit of the cooling system. At this time, the electronic water pump sucks the water in the water tank into the thermostat. The water in the thermostat will enter the preheater through the electronic water pump and the branch water inlet pipe, and then enter the engine body through the branch water outlet pipe. A circulating water circuit is installed between the methanol pump and the engine body. Part of the water will preheat the engine body through the circulating water circuit; A methanol preheating chamber is installed on the engine block. Part of the water in the engine block will pass by the outside of the methanol preheating chamber to preheat the methanol inside the methanol preheating chamber, accelerating the methanol to reach the combustion point. After preheating for a period of time, then the methanol pump starts to work, sucking out the methanol in the methanol preheating chamber and transporting it to multiple fuel injectors for multi-point fuel injection. After the temperature reaches the set value, the entire preheating system stops working, and the engine ECU determines to enter the starting state based on the signals of various sensors. S2. Heat dissipation: After the engine runs for a certain period of time, the temperature on the engine rises. When the temperature reaches a certain level, the electric water pump stops operating. At this time, the thermostat operates to close the preheating water circuit and open the heat dissipation water circuit. At this time, the mechanical water pump on the engine will suck out the water in the water tank and form a heat dissipation circulation water circuit on the engine block through the main inlet pipe and the main outlet pipe. At this time, the radiator starts to dissipate heat from the water in the water tank.

[0018] Compared with the existing technology, the advantages of the present invention are as follows: 1. When the multi-point fuel injection methanol engine operates specifically, by setting a thermostat to control the water circuit and cooperating with the preheater for preheating or heat dissipation. During preheating, the amount of water in the water circuit is small, the heating speed of the water is fast, and the preheating efficiency is high. During heat dissipation, due to the small amount of preheated water, the impact on heat dissipation is low.

[0019] 2. When the multi-point fuel injection methanol engine operates specifically, by setting a flow component in the preheater to make the water in the preheating water cylinder in the preheater flow, improving the fluidity of the water, making the water preheat faster and more evenly, and cooperating with the use of the enlarged water inlet and the heat conduction plate to increase the contact area between the water and the heating module, making the preheating efficiency of the water higher.

[0020] 3. When the multi-point fuel injection methanol engine operates specifically, by setting a Venturi tube bundle to reduce the contact area between the water in the preheating water cylinder and the preheating water cylinder, and the Venturi tube bundle can also accelerate the water flow speed in the preheating water cylinder, reducing the contact time between the water in the preheating water cylinder and the preheating water cylinder, thereby effectively reducing heat energy loss and increasing the water temperature rise speed in the preheating water cylinder.

[0021] 4. When the multi-point fuel injection methanol engine operates specifically, by setting an energy storage heating component to absorb and store the heat on the engine block, and releasing the stored heat energy into the water in the preheating water cylinder through the oil circuit during startup to heat the water in the preheating water cylinder, making the water in the preheating water cylinder heat up faster, improving the heating efficiency, and at the same time reducing the energy consumption of the heating module.

[0022] In summary, when the engine is running, a thermostat is used to control the water circuit circulation. The small water volume circulating water and the preheater are utilized to preheat the methanol pump and the engine body, avoiding cold start of the engine, improving the combustion efficiency of methanol, making the methanol burn more fully. At the same time, during the preheating process, the heating efficiency of the water in the preheater is increased, accelerating the preheating speed of methanol. And when the engine is operating, a heat accumulator is used to absorb and store the heat on the engine and release it for use during preheating, reducing the energy consumption of the heating module and increasing the heating speed of the water in the preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further elaborates on the specific implementation manners of the present invention with reference to the drawings, where: Figure 1 is a schematic structural diagram of a multi-point electronic injection methanol engine proposed by the present invention; Figure 2 is Figure 1 a detailed schematic structural diagram from another angle; Figure 3 is Figure 2 a detailed schematic structural diagram after rotating a certain angle; Figure 4 is Figure 1 a detailed schematic structural diagram of the thermostat inside the main water inlet pipe below the temperature sensor in ; Figure 5 is Figure 1 an enlarged schematic structural diagram of the preheater in ; Figure 6 is Figure 5 a detailed schematic structural diagram after rotating a certain angle; Figure 7 is Figure 6 a detailed schematic structural diagram after rotating a certain angle and opening the outer shell in ; Figure 8 is Figure 7 a detailed schematic structural diagram after removing the outer shell and shortening the branch water inlet pipe and the oil outlet pipe; Figure 9 is Figure 8 a detailed schematic structural diagram of the planar structure along one of the angles; Figure 10 is Figure 9 a three-dimensional schematic structural diagram along the A-A section; Figure 11 is Figure 10 a detailed schematic structural diagram after removing the preheating oil cylinder and the end of the heating module; Figure 12 is Figure 11 a detailed schematic structural diagram after removing the spiral blade; Figure 13 is Figure 12Detailed structural diagram after removing the branch water outlet pipe and preheating water cylinder; Figure 14 for Figure 13 Detailed schematic diagram of the structure after removing the heating module and the heat conducting plate and rotating them to a certain angle; Figure 15 for Figure 14 Detailed schematic diagram of the structure after the partition and the venturi tube bundle are removed and the piston cylinder is cut open; Figure 16 for Figure 15 A detailed schematic diagram of the enlarged structure of the middle motor and the push-pull mechanism; Figure 17 for Figure 16 An enlarged schematic diagram of the mid-stroke expansion structure; Figure 18 This is a detailed diagram showing the internal structure of the preheater in Example 2.

[0024] In the figure: 1 engine body, 2 methanol pump, 3 radiator, 4 oil pump, 5 heat storage, 6 preheater, 7 electronic water pump, 8 thermostat, 9 temperature sensor, 10 methanol preheating chamber, 11 water tank, 12 shell, 13 oil inlet pipe, 14 branch water outlet pipe, 15 branch water inlet pipe, 16 oil outlet pipe, 17 controller, 18 heating module, 19 preheating oil cylinder, 20 preheating water cylinder, 21 motor, 22 spiral blade, 23 water guide pipe, 24 inner gear ring, 25 heat conduction plate, 26 venturi tube bundle, 27 water expansion port, 28 piston cylinder, 29 partition, 30 one-way water outlet pipe, 31 toothed disc, 32 piston disc, 33 first hemisphere, 34 second hemisphere, 35 incomplete toothed barrel, 36 elliptical plate, 37 first telescopic rod, 38 second telescopic rod, 39 gear, 40 elastic telescopic rod, 41 screw, 42 first disc, a water inlet pipe, b air inlet pipe, c water outlet pipe, d air outlet pipe, e combustion chamber, f igniter, g alcohol inlet pipe, h preheating chamber. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1: Reference Figures 1-4 , Figures 12-17 , a multi-point electronic injection methanol engine, comprising an engine body 1, a preheating system and a heat dissipation system; The preheating system and the cooling system include a water tank 11, a thermostat 8, and an electric water pump 7 that are fixedly installed on the engine block 1 in common. The preheating system further includes a preheater 6, and the cooling system further includes a radiator 3 for dissipating heat from the water tank 11. The electric water pump 7, the preheater 6, the methanol pump 2, the water tank 11, and the engine block 1 are connected through a branch inlet pipe 15 and a branch outlet pipe 14 to form a branch preheating system. A temperature sensor 9 and a controller 17 for controlling the start and stop of the preheater 6 are installed on the engine block 1.

[0027] It is judged whether heating is required according to the value of the temperature sensor 9. If heating is required, the controller 17 controls the preheater 6 to start and starts the electric water pump 7. At this time, the thermostat 8 is in the closed state, closing the cooling system water circuit. At this time, the electric water pump 7 sucks the water in the water tank 11 into the thermostat 8, and the water in the thermostat 8 enters the preheater 6 through the electric water pump 7 and the branch inlet pipe 15, and then enters the engine block 1 through the branch outlet pipe 14. A circulation water circuit is installed between the methanol pump 2 and the engine block 1, and part of the water preheats the methanol pump 2 through the circulation water circuit.

[0028] The preheater 6 is composed of a methanol pump 2, a preheating water cylinder 20, and a heating module 18. The branch inlet pipe 15 is connected to the preheating water cylinder 20 through a water guide pipe 23. The water in the preheating water cylinder 20 enters the engine block 1 through the branch outlet pipe 14. The controller 17 controls the operation of the heating module 18. A heat conduction plate 25 that cooperates with the water inside the preheating water cylinder 20 is installed on the heating module 18, and a flow component that cooperates with the heat conduction plate 25 is installed on the preheating water cylinder 20. After the electric water pump 7 pumps the water in the water tank 11 into the preheating water cylinder 20, the controller 17 controls the spark plug in the heating module 18 to ignite. At the same time, the methanol pump 2 injects external methanol into the heating module 18 through a methanol injector for combustion, and the exhaust gas generated by the combustion is discharged from the heating module 18. The heat on the heating module 18 is conducted to the inside of the preheating water cylinder 20 through the heat conduction plate 25 to heat the water in the preheating water cylinder 20. At this time, a one-way valve is installed on the branch outlet pipe 14, and the one-way valve is closed. Due to the effect of the one-way valve, the water circuit is blocked. When the electric water pump 7 pumps water, the water in the preheating water cylinder 20 will increase. Therefore, it is necessary to discharge the air in the preheating water cylinder 20. An exhaust hole is used, and a molecular film is installed on the exhaust hole. When the preheating water cylinder 20 is full of water, the operation of the electric water pump 7 is stopped, and the water is heated in the preheating water cylinder 20 for a certain period of time. After heating to a certain temperature, the one-way valve opens, and the electric water pump 7 continues to operate to pump the water in the preheating water cylinder 20 into the engine block 1 to heat the engine block 1.

[0029] The flow component includes a piston cylinder 28 fixedly installed inside the preheating water cylinder 20. A piston disc 32 is slidably installed inside the piston cylinder 28. A push-pull mechanism cooperating with the piston disc 32 is installed on the preheating water cylinder 20. A plurality of one-way pipes are fixedly installed on the piston disc 32. A one-way water outlet pipe 30 is fixedly installed at the end of the piston cylinder 28. A water expansion port 27 is fixedly installed at the end of the one-way water outlet pipe 30.

[0030] After the preheating water cylinder 20 is filled with water, the piston disc 32 inside the piston cylinder 28 will reciprocate inside the piston cylinder 28 under the action of the push-off mechanism, pumping the water on one side of the piston cylinder 28 to the other side. Under the action of the water expansion port 27, it diffuses onto the heat conduction plate 25, increasing the contact area with the heat conduction plate 25. At the same time, the water inside the preheating water cylinder 20 flows, making the heating of the water more uniform and the heating efficiency higher. The cooperation between the one-way water outlet pipe 30 and the one-way pipes makes the water inside the preheating water cylinder 20 can only flow from one side of the piston cylinder 28 to the other side.

[0031] Two partition plates 29 are fixedly installed inside the preheating water cylinder 20. A plurality of venturi tube bundles 26 are fixedly installed together between the two partition plates 29; The water coming out of the piston cylinder 28 will enter between the partition plate 29 and the heat conduction plate 25, and then flow back to the water inlet end of the piston cylinder 28 through the venturi tube bundles 26 between the two partition plates 29, forming a water cycle. The venturi tube bundles 26 will accelerate the water flow, reduce the contact time between the water and the preheating water cylinder 20, and the venturi tube bundles 26 can also reduce the contact area between the water and the preheating water cylinder 20, thereby reducing heat energy transfer and improving the heat conduction rate, effectively improving the heating efficiency of the water.

[0032] The push-pull mechanism includes a motor 21 fixedly installed outside the preheating water cylinder 20. An elliptical plate 36 is fixedly installed on the driving end of the motor 21. A first telescopic rod 37 is rotatably installed outside the preheating water cylinder 20 through a rotating shaft. The elliptical plate 36 is rotatably connected to the telescopic end of the first telescopic rod 37. A second hemispherical body 34 is installed on the first telescopic rod 37 through a stroke expansion structure. A first hemispherical body 33 cooperating with the second hemispherical body 34 is fixedly installed on the piston disc 32. A support frame is fixedly installed inside the preheating water cylinder 20, and a return spring is fixedly installed between the support frame and the piston disc 32.

[0033] The driving end of the motor 21 rotates to drive the elliptical plate 36 fixedly connected thereto to rotate, thereby driving the telescopic end of the first telescopic rod 37 to rotate (the driving end of the motor 21 and the first telescopic rod 37 are respectively located on two circles of the elliptical plate 36). The first telescopic rod 37 will perform a circular motion. During the motion, the first telescopic rod 37 will reciprocally expand and contract and the angle changes, achieving the effect of a pendulum; The reciprocating swing of the first telescopic rod 37 will drive the reciprocating swing of the second hemispherical body 34 (swinging around the rotation axis) by forming an expansion structure. The swinging of the second hemispherical body 34 intermittently presses against the first hemispherical body 33, and under the action of the return spring, the first hemispherical body 33 drives the piston disc 32 to reciprocate within the piston cylinder 28.

[0034] The stroke expansion structure includes a shaft rod fixedly installed on the first telescopic rod 37. The axis of the shaft rod is the same as that of the rotation axis. An incomplete toothed cylinder 35 is fixedly installed on the shaft rod. A round block is fixedly installed at the bottom of the first telescopic rod 37. A hole is opened on the round block, and a nut is fixedly installed in the hole. A screw rod 41 is rotationally installed on the nut by thread. One end of the screw rod 41 is rotatably connected to the second hemispherical body 34, and a cylinder is fixedly installed at the other end of the screw rod 41. A second disc is fixedly installed on the cylinder. A first disc 42 is fixedly installed on the round block. A plurality of elastic telescopic rods 40 are fixedly installed between the first disc 42 and the second disc.

[0035] Since the radii of the first hemispherical body 33 and the second hemispherical body 34 are fixed, during a single swing, the displacement of the piston disc 32 is the radius of the second hemispherical body 34. The movement amount is limited and small, so the amount of water pumped per single time is small, which affects the fluidity of water. Therefore, it is necessary to expand the displacement of the piston disc 32. Since the radius of the second hemispherical body 34 cannot be changed, it is necessary to change the position of the second hemispherical body 34. The specific operation is as follows: When rotating clockwise, with the swing of the first telescopic rod 37, the round block will be driven to swing. The gear 39 meshes with the incomplete toothed cylinder 35. With the swing of the round block, the gear 39 will rotate, driving the cylinder and the screw rod 41 to rotate. The screw rod 41 rotates and moves under the action of the nut. The movement of the screw rod 41 drives the second hemispherical body 34 to move towards the side close to the first hemispherical body 33, thereby changing the position of the second hemispherical body 34 and expanding the displacement of the first hemispherical body 33 (the second hemispherical body 34 always abuts against the first hemispherical body 33. With the swing of the second hemispherical body 34, the contact position with the first hemispherical body 33 is different); Due to the swing of the second hemispherical body 34, the second hemispherical body 34 will move from one side of the first hemispherical body 33 to the middle position of the first hemispherical body 33, and then move to the other side of the first hemispherical body 33. During this process, the first hemispherical body 33 will reciprocate. Since the moving direction of the second hemispherical body 34 is always clockwise during this process, the gear 39 will always be engaged with the incomplete tooth cylinder 35. If it is always engaged, when the second hemispherical body 34 moves to the other side of the first hemispherical body 33, at this time, the horizontal displacement of the second hemispherical body 34 reaches the maximum. When the second hemispherical body 34 is reset, due to the excessive displacement of the second hemispherical body 34, it cannot be attached to the side of the first hemispherical body 33 and exceeds the edge of the first hemispherical body 33. At this time, when resetting, the second hemispherical body 34 will be stuck under the block of the first hemispherical body 33. Therefore, when swinging clockwise, after the second hemispherical body 34 reaches the center position of the first hemispherical body 33, the second hemispherical body 34 continues to swing clockwise. At this time, the second hemispherical body 34 will not continue to move but stop moving, which can be achieved through the following operations; When the second hemispherical body 34 moves to be flush with the first hemispherical body 33, at this time, the outermost end of the screw rod 41 moves to the nut position. When the screw rod 41 is further rotated, the screw rod 41 will separate from the nut, and the cylinder will enter the nut. At this time, the screw rod 41 separates from the nut and will not drive the second hemispherical body 34 to continue moving. When the second hemispherical body 34 swings in the reverse direction (counterclockwise swing), at this time, the elastic telescopic rod 40 will press against the first disc 42, and the first disc 42 will generate a reaction force on the second disc, causing the cylinder to move in the reverse direction, thereby driving the screw rod 41 to move in the reverse direction. After the screw rod 41 moves in the reverse direction, the screw rod 41 will continue to engage with the nut. Since the screw rod 41 moves in the reverse direction at this time, it will rotate in the reverse direction under the action of the gear 39, thereby driving the second hemispherical body 34 to move in the reverse direction and reset; The above function is to expand the horizontal displacement of the second hemispherical body 34, thereby expanding the displacement of the first hemispherical body 33. During the horizontal movement and swing of the second hemispherical body 34, the first hemispherical body 33 and the second hemispherical body 34 are always in contact with each other.

[0036] A second telescopic rod 38 is fixedly installed on the round block, and the bottom of the second telescopic rod 38 is rotatably connected to the preheating water cylinder 20; The purpose of this design is to limit the round block to prevent the round block from shifting; An energy storage heating component that cooperates with the preheater 6 and the water tank 11 is installed on the engine block 1; the electronic water pump 7, the thermostat 8, the engine block 1, and the water tank 11 are connected through the main water pipe to form a heat dissipation system.

[0037] During heat dissipation, the temperature on the engine rises. When the temperature reaches a certain level, the electric water pump 7 operates. At this time, the thermostat 8 operates to close the preheating water circuit and open the cooling water circuit. At this time, the electric water pump 7 sucks out the water in the water tank 11 and forms a cooling circulation water circuit on the engine block 1 through the main inlet pipe and the main outlet pipe. At this time, the radiator 3 starts to cool the water in the water tank 11.

[0038] The energy storage heating component includes a heat accumulator 5 fixedly installed on the engine block 1. The heat accumulator 5 absorbs and stores the thermal energy on the engine block 1. A fuel pump 4 is fixedly connected to the heat accumulator 5. A preheating oil cylinder 19 is fixedly installed outside the preheating water cylinder 20. An inlet pipe 13 and an outlet pipe 16 are connected to the preheating oil cylinder 19. The inlet pipe 13 is connected to the heat accumulator 5, and the outlet pipe 16 is connected to the fuel pump 4. A spiral blade 22 is rotatably installed outside the preheating water cylinder 20. A gear disk 31 is fixedly installed at the driving end of the motor 21. An internal gear ring 24 meshing with the gear disk 31 is fixedly installed on the spiral blade 22.

[0039] Auxiliary preheating: Part of the heat generated during the operation of the engine is dissipated by the cooling system, while the other part is absorbed and stored by the heat accumulator 5. During the preheating process, the heat accumulator 5 releases energy, and the fuel pump 4 operates to pump out the oil in the preheating oil cylinder 19. The oil is heated by the heat accumulator 5 and then returns to the preheating oil cylinder 19. The oil in the preheating oil cylinder 19 releases heat to the preheating water cylinder 20 to heat the water in the preheating water cylinder 20. With the operation of the motor 21, the gear disk 31 will be driven to rotate. Under the action of the internal gear ring 24, the spiral blade 22 is driven to rotate, and the oil in the preheating oil cylinder 19 is evenly transported from one end of the preheating oil cylinder 19 to the other end, increasing the contact time between the oil in the preheating oil cylinder 19 and the preheating water cylinder 20 and improving the heat transfer efficiency.

[0040] Embodiment 2: The difference between this embodiment and the technical solution of Embodiment 1 is that: Refer to Figures 1-3 、 Figure 18 , the preheater 6 is a single unit and is directly connected to the engine block 1. Its specific operation is as follows: Methanol is introduced into the combustion chamber e through the methanol inlet pipe g, and external air is introduced into the combustion chamber e through the air inlet pipe b. Then, the methanol in the combustion chamber e is ignited by the spark plug in the igniter f. After the methanol in the combustion chamber e burns, a large amount of heat is generated. At this time, the electric water pump 7 introduces the preheated water into the preheating chamber 19 through the inlet pipe a. The water absorbs the heat generated by the combustion in the combustion chamber e in the preheating chamber h, and then flows into the engine block 1 through the outlet pipe c to preheat the engine block 1. The combustion exhaust gas will be discharged through the exhaust pipe d.

[0041] The specific operation steps of this device are as follows: Preheating: The controller 17 determines whether heating is required based on the value of the temperature sensor 9. If heating is required, the controller 17 controls the preheater 6 to start and starts the electronic water pump 7. At this time, the thermostat 8 is in the closed state, closing the water circuit of the cooling system. The electronic water pump 7 sucks the water in the water tank 11 into the thermostat 8. The water in the thermostat 8 will enter the preheater 6 through the electronic water pump 7 and the branch inlet pipe 15, and then enter the engine block 1 through the branch outlet pipe 14. A circulating water circuit is installed between the methanol pump 2 and the engine block 1, and part of the water will preheat the engine block 1 through the circulating water circuit; During the preheating process in the preheater 6: The motor 21 starts. The rotating drive end of the motor 21 drives the elliptical plate 36 fixedly connected thereto to rotate, thereby driving the telescopic end of the first telescopic rod 37 to rotate. The first telescopic rod 37 will perform a circular motion. During the motion, the first telescopic rod 37 will reciprocally expand and contract and change the angle, achieving the effect of a pendulum; The reciprocating swing of the first telescopic rod 37 will drive the second hemispherical body 34 to reciprocally swing through an expansion structure. The second hemispherical body 34 swings and intermittently presses against the first hemispherical body 33, and under the action of the return spring, the first hemispherical body 33 drives the piston disc 32 to reciprocally move in the piston cylinder 28; When rotating clockwise, as the first telescopic rod 37 swings, it will drive the round block to swing. The gear 39 meshes with the incomplete tooth cylinder 35. As the round block swings, the gear 39 will rotate, driving the cylinder and the screw 41 to rotate. The rotation of the screw 41 causes it to move under the action of the nut. The movement of the screw drives the second hemispherical body 34 to move towards the side close to the first hemispherical body 33, thereby changing the position of the second hemispherical body 34 and expanding the displacement of the first hemispherical body 33; Due to the swing of the second hemispherical body 34, the second hemispherical body 34 will move from one side of the first hemispherical body 33 to the middle position of the first hemispherical body 33, and then move to the other side of the first hemispherical body 33. During this process, the first hemispherical body 33 will reciprocate. Since the moving direction of the second hemispherical body 34 is always clockwise during this process, the gear 39 will always mesh with the incomplete tooth cylinder 35. If it always meshes, when the second hemispherical body 34 moves to the other side of the first hemispherical body 33, at this time, the horizontal displacement of the second hemispherical body 34 reaches the maximum. When the second hemispherical body 34 resets, due to the excessive displacement of the second hemispherical body 34, it cannot be in contact with the side of the first hemispherical body 33 and exceeds the edge of the first hemispherical body 33. At this time, when resetting, the second hemispherical body 34 will be stuck under the block of the first hemispherical body 33. Therefore, when swinging clockwise, after the second hemispherical body 34 reaches the center position of the first hemispherical body 33, the second hemispherical body 34 continues to swing clockwise. At this time, the second hemispherical body 34 will not continue to move but stop moving, which can be achieved through the following operations; When the second hemispherical body 34 moves to be flush with the first hemispherical body 33, at this time the outermost end of the screw rod 41 moves to the nut position. Continuing to rotate the screw rod 41, the screw rod 41 will separate from the nut, and the cylinder will enter the nut. At this time, the screw rod 41 is separated from the nut and will not drive the second hemispherical body 34 to continue moving. When the second hemispherical body 34 swings in the reverse direction, at this time the elastic telescopic rod 40 will press against the first disc 42, and the second disc 42 will generate a reaction force on the first disc, causing the cylinder to move in the reverse direction, thereby driving the screw rod 41 to move in the reverse direction. After the screw rod 41 moves in the reverse direction, the screw rod 41 will continue to engage with the nut. Since the screw rod 41 moves in the reverse direction at this time, it will rotate in the reverse direction under the action of the gear 39, thereby driving the second hemispherical body 34 to move in the reverse direction and reset; A methanol preheating chamber 10 is installed on the engine block 1. A part of the water in the engine block 1 will pass outside the methanol preheating chamber 10 to preheat the methanol inside the methanol preheating chamber 10, accelerating the methanol to reach the combustion point; After preheating for a period of time, the methanol in the methanol preheating chamber 10 is sucked out and transported to multiple fuel injectors for multi-point fuel injection. After the temperature reaches the set value, the entire preheating system stops working, and the engine ECU determines to enter the starting state according to the signals of each sensor; Heat dissipation: After the engine runs for a certain period of time, the temperature on the engine rises. When the temperature reaches a certain level, the electric water pump 7 stops operating. At this time, the thermostat 8 operates to close the preheating water circuit and open the heat dissipation water circuit. At this time, the mechanical water pump on the engine will suck out the water in the water tank 11 and form a heat dissipation circulating water circuit on the engine block 1 through the main inlet pipe and the main outlet pipe. At this time, the radiator 3 starts to dissipate heat from the water in the water tank 11.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A multi-point electronic injection methanol engine, comprising an engine body (1), characterized in that, It also includes a preheating system and a heat dissipation system; The preheating system and the heat dissipation system include a common water tank (11), a thermostat (8), and an electronic water pump (7) fixedly installed on the engine block (1). The preheating system further includes a preheater (6), and the heat dissipation system further includes a radiator (3) for dissipating heat from the water tank (11). The electronic water pump (7), the preheater (6), the methanol pump (2), the water tank (11), and the engine block (1) are connected through a branch inlet pipe (15) and a branch outlet pipe (14) to form a branch preheating system. A temperature sensor (9) and a controller (17) for controlling the start and stop of the preheater (6) are installed on the engine block (1); An energy storage heating component cooperating with the preheater (6) and the water tank (11) is installed on the engine block (1); The electronic water pump (7), the thermostat (8), the engine block (1), and the water tank (11) are connected through the main road water pipe to form a heat dissipation system.

2. The multi-point electronic injection methanol engine according to claim 1, wherein, The preheater (6) is composed of a methanol pump (2), a preheated water cylinder (20), and a heating module (18). The branch inlet pipe (15) is connected to the preheated water cylinder (20) through a water guide pipe (23). The water in the preheated water cylinder (20) enters the engine block (1) through the branch outlet pipe (14). The controller (17) controls the operation of the heating module (18). A heat conducting plate (25) cooperating with the water inside the preheated water cylinder (20) is installed on the heating module (18). A flow component cooperating with the heat conducting plate (25) is installed on the preheated water cylinder (20).

3. The multi-point electronic injection methanol engine according to claim 2, wherein, The flow component includes a piston cylinder (28) fixedly installed inside the preheated water cylinder (20). A piston disc (32) is slidably installed inside the piston cylinder (28). A push-pull mechanism cooperating with the piston disc (32) is installed on the preheated water cylinder (20). A plurality of one-way pipes are fixedly installed on the piston disc (32). A one-way outlet pipe (30) is fixedly installed at the end of the piston cylinder (28). An expansion water inlet (27) is fixedly installed at the end of the one-way outlet pipe (30).

4. The multi-point electronic injection methanol engine according to claim 3, wherein, Two partition plates (29) are fixedly installed inside the preheated water cylinder (20). A plurality of venturi tube bundles (26) are fixedly installed together between the two partition plates (29).

5. The multi-point electronic injection methanol engine according to claim 3, characterized in that, The push-pull mechanism includes a motor (21) fixedly installed outside the preheated water cylinder (20). An elliptical plate (36) is fixedly installed on the driving end of the motor (21). A first telescopic rod (37) is rotatably installed outside the preheated water cylinder (20) through a rotating shaft. The elliptical plate (36) is rotatably connected to the telescopic end of the first telescopic rod (37). A second hemispherical body (34) is installed on the first telescopic rod (37) through a stroke expansion structure. A first hemispherical body (33) cooperating with the second hemispherical body (34) is fixedly installed on the piston disc (32). A support frame is fixedly installed inside the preheated water cylinder (20). A return spring is fixedly installed between the support frame and the piston disc (32).

6. The multi-point electronic injection methanol engine according to claim 5, wherein The stroke expansion structure includes a shaft rod fixedly installed on the first telescopic rod (37). The shaft rod has the same axis as the rotating shaft. An incomplete gear cylinder (35) is fixedly installed on the shaft rod. A round block is fixedly installed at the bottom of the first telescopic rod (37). A hole is opened in the round block, and a nut is fixedly installed in the hole. A screw rod (41) is rotationally installed on the nut in a threaded manner. One end of the screw rod (41) is rotatably connected to the second hemispherical body (34), and a cylinder is fixedly installed at the other end of the screw rod (41). A second disc is fixedly installed on the cylinder. A first disc (42) is fixedly installed on the round block. A plurality of elastic telescopic rods (40) are fixedly installed between the first disc (42) and the second disc.

7. The multi-point electronic injection methanol engine according to claim 6, wherein, A second telescopic rod (38) is fixedly installed on the round block. The bottom of the second telescopic rod (38) is rotatably connected to the preheating water cylinder (20).

8. The multi-point electronic injection methanol engine according to claim 5, characterized in that, The energy storage heating component includes a heat storage device (5) fixedly installed on the engine body (1). The heat storage device (5) absorbs and stores the heat energy on the engine body (1). An oil pump (4) is fixedly connected to the heat storage device (5). A preheating oil cylinder (19) is fixedly installed outside the preheating water cylinder (20). An oil inlet pipe (13) and an oil outlet pipe (16) are connected to the preheating oil cylinder (19). The oil inlet pipe (13) is connected to the heat storage device (5), and the oil outlet pipe (16) is connected to the oil pump (4).

9. The multi-point electronic injection methanol engine according to claim 8, characterized in that A spiral blade (22) is rotatably installed outside the preheating water cylinder (20). A gear disc (31) is fixedly installed at the driving end of the motor (21). An internal gear ring (24) meshing with the gear disc (31) is fixedly installed on the spiral blade (22).

10. A method for operating a multi-point electronic injection methanol engine, which is used for the multi-point electronic injection methanol engine according to any one of claims 1-9, characterized in that, Including the following steps: S1. Preheating: The controller (17) determines whether heating is required according to the value of the temperature sensor (9). If heating is required, the controller (17) controls the preheater (6) to start and starts the electronic water pump (7). At this time, the thermostat (8) is in the closed state, closing the water circuit of the cooling system. At this time, the electronic water pump (7) sucks the water in the water tank (11) into the thermostat (8). The water in the thermostat (8) will enter the preheater (6) through the electronic water pump (7) and the branch water inlet pipe (15), and then enter the engine body (1) through the branch water outlet pipe (14). A circulation water circuit is installed between the methanol pump (2) and the engine body (1). Part of the water will preheat the methanol pump (2) through the circulation water circuit; A methanol preheating bin (10) is installed on the engine body (1). Part of the water in the engine body (1) will pass outside the methanol preheating bin (10) to preheat the methanol inside the methanol preheating bin (10), accelerating the methanol to reach the ignition point; After preheating for a period of time, then the methanol pump (2) starts to work, sucking out the methanol in the methanol preheating bin (10) and transporting it to a plurality of fuel injectors for multi-point fuel injection. After the temperature reaches the set value, the entire preheating system stops working. The engine ECU determines to enter the starting state according to the signals of each sensor. S2. Heat dissipation: After the engine has been running for a certain period of time, the temperature on the engine rises. When the temperature reaches a certain level, the electric water pump (7) operates. At this time, the thermostat (8) operates to close the preheating water circuit and open the heat dissipation water circuit. At this time, the electric water pump (7) will suck out the water in the water tank (11) and form a heat dissipation circulating water circuit on the engine block (1) through the main inlet pipe and the main outlet pipe. At this time, the radiator (3) starts to dissipate heat from the water in the water tank (11).

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