A multi-cylinder ignition type air injection two-stroke direct injection multi-fuel design structure

Abstract

The present invention relates to the technical field of two-stroke engines, and discloses a multi-cylinder ignition type air-injection two-stroke direct injection multi-fuel design structure, which includes a fuel system, an intake system and a mixed rail air-injection system. The multi-cylinder ignition type air-injection two-stroke direct injection multi-fuel design structure has the following characteristics: intake boosting technology: using an air compressor to achieve intake boosting, thereby improving engine performance; air-assisted boosting technology: using an air compressor to achieve in-rail auxiliary boosting, thereby increasing the degree of mixing of fuel and air and improving engine performance; air-injection cylinder direct injection technology: the atomized particle diameter of the existing high-pressure common rail technology is about 10-15 microns. Through the air-injection technology, the mixed particles of fuel and air are more thoroughly atomized, and the diameter of diesel can be made to 5-8 microns, thereby realizing ignition type cylinder direct injection; and multi-fuel driving technology: it is easier to ignite low-ignition-point fuels, thereby achieving full combustion in different oil environments such as gasoline, kerosene, diesel, and alcohol gasoline.

Description

Technical Field

[0001] The present invention relates to the technical field of two-stroke engines, in particular to a multi-cylinder ignition type air-injection two-stroke direct injection multi-fuel design structure. Background Art

[0002] Existing two-stroke engines are usually driven by a single fuel, and diesel is mostly compression ignited. Since the oil and gas cannot be fully mixed, it leads to high fuel consumption, large losses, and difficulty in increasing power, which has become an unsolvable problem today. At the same time, high-pressure common rail technology allows air and gas to be premixed, which makes the fuel atomization more thorough, and through air-assisted supercharging and air-injection technology, it can achieve multi-fuel drive, greatly meeting the multi-faceted needs of different regions and different users. It is a brand-new form of two-stroke engine that has not been seen on the market. For this reason, a multi-cylinder ignition air-injection two-stroke direct injection multi-fuel design structure is proposed. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In response to the shortcomings of the existing technology, the present invention provides a multi-cylinder ignition-type air-injection two-stroke direct injection multi-fuel design structure, which adopts the ignition-type air-injection direct injection method, and the mixed gas can be fully burned, which greatly improves the engine performance, improves emissions, increases power, and reduces losses. It solves the problem that the existing two-stroke engine with a single fuel drive cannot fully mix oil and gas, resulting in high fuel consumption, large losses, and difficulty in power increase.

[0005] (2) Technical solution

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a multi-cylinder ignition-type air-injection two-stroke direct injection multi-fuel design structure, comprising a fuel system, an intake system and a mixing rail air-injection system.

[0007] Preferably, the fuel system includes an oil inlet pipe, an oil return pipe, an oil outlet pipe, a high-pressure oil pump, a fuel inlet, a high-pressure fuel inlet, and a mixing rail.

[0008] Preferably, the intake system includes a high-pressure air muffler, a pressure relief port, a high-pressure fuel inlet, an exhaust pipe, a mixing rail, a high-pressure air inlet, a flywheel, a belt, an air compressor, a crankshaft, an intake pipe, an air distributor, a high-pressure air pipe, and a cylinder.

[0009] Preferably, the hybrid rail and air injection system includes an ECU, a fuel injector, an air pressure sensor, an exhaust pipe, a high-pressure fuel inlet, an oil outlet pipe, a hybrid rail, a high-pressure air pipe, a high-pressure air inlet, an air pressure valve, a cylinder, an igniter, a fuel pressure valve, a fuel return pipe, and a spark plug.

[0010] Preferably, the working process of the fuel system is as follows: the fuel enters the high-pressure fuel pump through the oil inlet pipe, is converted into high-pressure fuel by the oil pump, enters the mixing rail through the oil outlet pipe, and finally flows back to the high-pressure fuel pump through the oil return pipe.

[0011] Preferably, the working process of the intake system is: the flywheel is connected through the crankshaft rotation, and the flywheel is connected to the belt to drive the air compressor, so that the air enters the air compressor, is converted into high-pressure gas by the compressor, and enters the air distributor. The air distributor has two outlets, one is directly sprayed into the cylinder through the intake pipe, and the other enters the mixing rail through the high-pressure air pipe, and finally enters the high-pressure air muffler through the exhaust pipe, and is finally discharged through the pressure relief port.

[0012] Preferably, the working process of the mixing rail air injection system is as follows: there are two channels in the mixing rail, namely the high-pressure fuel channel and the high-pressure air channel. First, the high-pressure air channel (indicated in blue) passes through the above-mentioned intake system, and the high-pressure gas enters the mixing rail through the high-pressure air inlet. The pressure in the mixing rail is stabilized by the air pressure valve. Part of the high-pressure gas enters the fuel injector, and part enters the air pressure sensor. Under the control of the ECU, when the pressure is too high, the one-way valve in the air pressure sensor opens, allowing part of the high-pressure gas to enter the high-pressure air muffler through the exhaust pipe, and finally discharged through the pressure relief port;

[0013] Then the high-pressure fuel channel (indicated in red) passes through the above-mentioned fuel system, and the high-pressure fuel enters the mixing rail through the high-pressure fuel inlet. The pressure in the mixing rail is stabilized by the fuel pressure valve. Part of the high-pressure fuel enters the fuel injector, and part enters the fuel pressure sensor. Under the control of the ECU, when the high-pressure fuel pressure is higher than the high-pressure gas pressure, the one-way valve in the fuel pressure sensor opens, allowing part of the high-pressure fuel to enter the high-pressure fuel pump through the return pipe. It is converted by the high-pressure fuel pump for secondary use. When the high-pressure fuel pressure is lower than the high-pressure gas pressure, the fuel pressure sensor is sealed by the high-pressure gas, and the one-way valve will not open;

[0014] Finally, a small amount of high-pressure fuel and a small amount of high-pressure gas enter the fuel injector for premixing. After the air-entrained injection technology, the mixed particles of the high-pressure fuel and high-pressure gas are atomized more thoroughly, and finally directly injected into the cylinder to form a direct injection drive. Finally, the spark plug ignites, and the high-pressure mixed gas in the cylinder burns to complete the work.

[0015] Compared with the prior art, the present invention provides a multi-cylinder ignition type air injection two-stroke direct injection multi-fuel design structure, which has the following beneficial effects:

[0016] 1. The multi-cylinder ignition type air-injection two-stroke direct injection multi-fuel design structure, intake boosting technology: intake boosting is achieved through an air compressor to improve engine performance, air-assisted boosting technology: in-rail auxiliary boosting is achieved through an air compressor to increase the degree of mixing of fuel and air and enhance engine performance, air-injection direct injection technology: the atomized particle diameter of the existing high-pressure common rail technology is about 10-15 microns, while this technology uses air-injection technology to make the mixed particles of fuel and air more thoroughly atomized, and can make diesel reach a diameter of 5-8 microns, realizing ignition type direct injection in the cylinder, multi-fuel drive technology: low ignition point fuels are easier to ignite, thereby achieving full combustion in different oil environments such as gasoline, kerosene, diesel, and alcohol gasoline.

[0017] 2. The multi-cylinder ignition-type air-injection two-stroke direct injection multi-fuel design structure and the mixed rail pressure controllable technology: through the air pressure valve, fuel pressure valve, air pressure sensor, and fuel pressure sensor, the air pressure, oil pressure and mixed gas pressure under different oil environments are well controlled. The cylinder pressure adaptability technology: through the above technology, under the conditions of different models and different cylinder pressures, the cylinder pressure is different through different power. The lower the cylinder pressure, the lower the fuel supply pressure, and the higher the cylinder pressure, the higher the fuel supply pressure, thereby realizing multi-faceted applications in different environments. Application technology under multi-cylinder conditions: through the above technology, multi-cylinder applications can be realized, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the fuel system structure of the present invention;

[0020] Figure 3 Schematic diagram of the air intake system structure of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the hybrid rail clamp air injection system of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 , a multi-cylinder ignition type air injection two-stroke direct injection multi-fuel design structure, including a fuel system, an intake system and a mixing rail air injection system.

[0024] Specifically, the fuel system includes an oil inlet pipe, an oil return pipe, an oil outlet pipe, a high-pressure oil pump, a fuel inlet, a high-pressure fuel inlet, and a mixing rail.

[0025] Specifically, the intake system includes a high-pressure air muffler, a pressure relief port, a high-pressure fuel inlet, an exhaust pipe, a mixing rail, a high-pressure air inlet, a flywheel, a belt, an air compressor, a crankshaft, an intake pipe, an air distributor, a high-pressure air pipe, and a cylinder.

[0026] Specifically, the hybrid rail and air injection system includes an ECU, a fuel injector, an air pressure sensor, an exhaust pipe, a high-pressure fuel inlet, an oil outlet pipe, a hybrid rail, a high-pressure air pipe, a high-pressure air inlet, an air pressure valve, a cylinder, an igniter, a fuel pressure valve, a fuel return pipe, and a spark plug.

[0027] Specifically, the working process of the fuel system is as follows: the fuel enters the high-pressure fuel pump through the fuel inlet pipe, is converted into high-pressure fuel by the fuel pump, enters the mixing rail through the fuel outlet pipe, and finally flows back to the high-pressure fuel pump through the fuel return pipe.

[0028] Specifically, the working process of the intake system is as follows: the flywheel is connected through the crankshaft rotation, and the flywheel is connected to the belt to drive the air compressor, so that air enters the air compressor, is converted into high-pressure gas by the compressor, and enters the air distributor. The air distributor has two outlets, one is directly sprayed into the cylinder through the intake pipe, and the other enters the mixing rail through the high-pressure air pipe, and finally enters the high-pressure air muffler through the exhaust pipe, and is finally discharged through the pressure relief port.

[0029] Specifically, the working process of the mixing rail air injection system is as follows: there are two channels in the mixing rail, namely the high-pressure fuel channel and the high-pressure air channel. First, the high-pressure air channel (indicated by blue) passes through the above-mentioned intake system and enters the mixing rail through the high-pressure air inlet. The pressure in the mixing rail is stabilized by the air pressure valve. Part of the high-pressure gas enters the fuel injector, and part enters the air pressure sensor. Under the control of the ECU, when the pressure is too high, the one-way valve in the air pressure sensor opens, allowing part of the high-pressure gas to enter the high-pressure air muffler through the exhaust pipe and finally be discharged through the pressure relief port.

[0030] Then the high-pressure fuel channel (indicated in red) passes through the above-mentioned fuel system, and the high-pressure fuel enters the mixing rail through the high-pressure fuel inlet. The pressure in the mixing rail is stabilized by the fuel pressure valve. Part of the high-pressure fuel enters the fuel injector, and part enters the fuel pressure sensor. Under the control of the ECU, when the high-pressure fuel pressure is higher than the high-pressure gas pressure, the one-way valve in the fuel pressure sensor opens, allowing part of the high-pressure fuel to enter the high-pressure fuel pump through the return pipe. It is converted by the high-pressure fuel pump for secondary use. When the high-pressure fuel pressure is lower than the high-pressure gas pressure, the fuel pressure sensor is sealed by the high-pressure gas, and the one-way valve will not open;

[0031] Finally, a small amount of high-pressure fuel and a small amount of high-pressure gas enter the fuel injector for premixing. After the air-entrained injection technology, the mixed particles of the high-pressure fuel and high-pressure gas are atomized more thoroughly, and finally directly injected into the cylinder to form a direct injection drive. Finally, the spark plug ignites, and the high-pressure mixed gas in the cylinder burns to complete the work.

[0032] Working principle: This multi-cylinder ignition type air injection two-stroke direct injection multi-fuel design structure, 1. Intake boost technology: The air compressor is used to achieve intake boost to improve engine performance, air-assisted boost technology: The air compressor is used to achieve in-rail auxiliary boost to increase the degree of mixing of fuel and air and improve engine performance, air injection cylinder direct injection technology: The atomized particle diameter of the existing high-pressure common rail technology is about 10-15 microns, while this technology uses air injection technology to make the mixed particles of fuel and air more thoroughly atomized, which can make the diesel reach 5-8 microns in diameter, realizing ignition type direct injection in the cylinder, multi-fuel drive technology: Through the above technology, low ignition point fuel It is easier to ignite, thereby achieving full combustion in different oil environments such as gasoline, kerosene, diesel, and alcohol gasoline. Mixed rail pressure controllable technology: through the air pressure valve, fuel pressure valve, air pressure sensor, and fuel pressure sensor, good control of air pressure, oil pressure, and mixed gas pressure in different oil environments is achieved. Cylinder pressure adaptability technology: through the above technology, under the conditions of different models and different cylinder pressures, the cylinder pressure is different through different power. The smaller the cylinder pressure, the lower the fuel supply pressure, and the larger the cylinder pressure, the higher the fuel supply pressure, thereby achieving multi-faceted applications in different environments. Application technology under multi-cylinder conditions: through the above technology, multi-cylinder applications can be achieved, and the application range is wide.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-cylinder ignition type air injection two-stroke direct injection multi-fuel design structure, characterized by: It includes a fuel system, an air intake system and a mixing rail air injection system. The fuel system includes an oil inlet pipe, an oil return pipe, an oil outlet pipe, a high-pressure oil pump, a fuel inlet, a high-pressure fuel inlet, and a mixing rail. The air intake system includes a high-pressure air muffler, a pressure relief port, a high-pressure fuel inlet, an exhaust pipe, a mixing rail, a high-pressure air inlet, a flywheel, a belt, an air compressor, a crankshaft, an intake pipe, an air distributor, a high-pressure air pipe, and a cylinder. The mixing rail air injection system includes an ECU, a fuel injector, an air pressure sensor, an exhaust pipe, a high-pressure fuel inlet, an oil outlet pipe, a mixing rail, a high-pressure air pipe, a high-pressure air inlet, an air pressure valve, Cylinder, igniter, fuel pressure valve, fuel return pipe, spark plug; the working process of the mixing rail air injection system is as follows: there are two channels in the mixing rail, namely the high-pressure fuel channel and the high-pressure air channel. First, the high-pressure air channel, after passing through the above-mentioned intake system, high-pressure gas enters the mixing rail through the high-pressure air inlet. The pressure in the mixing rail is stabilized by the air pressure valve. Part of the high-pressure gas enters the fuel injector, and part enters the air pressure sensor. Under the control of the ECU, when the pressure is too high, the one-way valve in the air pressure sensor opens, allowing part of the high-pressure gas to enter the high-pressure air muffler through the exhaust pipe and finally be discharged through the pressure relief port; The high-pressure fuel passage then passes through the aforementioned fuel system, and the high-pressure fuel enters the mixing rail through the high-pressure fuel inlet. The pressure in the mixing rail is stabilized by the fuel pressure valve, and part of the high-pressure fuel enters the fuel injector, while part enters the fuel pressure sensor. Under the control of the ECU, when the high-pressure fuel pressure is higher than the high-pressure gas pressure, the one-way valve in the fuel pressure sensor opens, allowing part of the high-pressure fuel to enter the high-pressure fuel pump through the return pipe, and then be converted by the high-pressure fuel pump for secondary use. When the high-pressure fuel pressure is lower than the high-pressure gas pressure, the fuel pressure sensor is sealed by the high-pressure gas, and the one-way valve will not open. Finally, a small amount of high-pressure fuel and a small amount of high-pressure gas enter the fuel injector for premixing. After the air-entrained injection technology, the mixed particles of the high-pressure fuel and high-pressure gas are atomized more thoroughly, and finally directly injected into the cylinder to form a direct injection drive. Finally, the spark plug ignites, and the high-pressure mixed gas in the cylinder burns to complete the work.

2. A multi-cylinder spark-ignition, air-injection, two-stroke direct injection, multi-fuel design structure according to claim 1, characterized in that: The working process of the fuel system is as follows: the fuel enters the high-pressure fuel pump through the fuel inlet pipe, is converted into high-pressure fuel by the fuel pump, enters the mixing rail through the fuel outlet pipe, and finally flows back to the high-pressure fuel pump through the fuel return pipe.

3. The multi-cylinder spark-ignition type air injection two-stroke direct injection multi-fuel design structure according to claim 1 is characterized by: The working process of the intake system is as follows: the flywheel is connected through the crankshaft rotation, and the flywheel is connected to the belt to drive the air compressor, so that air enters the air compressor, is converted into high-pressure gas by the compressor, and enters the air distributor. The air distributor has two outlets, one is directly sprayed into the cylinder through the intake pipe, and the other enters the mixing rail through the high-pressure air pipe, and finally enters the high-pressure air muffler through the exhaust pipe, and is finally discharged through the pressure relief port.

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