Automobile engine with double injection systems

Abstract

The invention discloses an automobile engine with double injection systems, which comprises an oil transportation system, a single chip microcomputer, a cylinder and an oil tank, the cylinder is provided with an intake manifold, an exhaust manifold and a spark plug, the intake manifold and the exhaust manifold are respectively provided with an air valve, and the spark plug is connected with the single chip microcomputer. The electromagnetic oil sprayer is fixedly communicated with the interior of the air inlet manifold and the interior of the air cylinder through a double-way oil distribution spray head, the electromagnetic oil sprayer is communicated with the oil conveying system, and the electromagnetic oil sprayer is electrically connected with the single-chip microcomputer. By means of the overall arrangement, particulate matter emission can be greatly reduced by adopting manifold spraying under medium and low loads. And manifold injection is adopted when the cold machine state is small in load, and engine oil dilution is effectively avoided. When the temperature is enough, direct injection in the cylinder can effectively improve the working efficiency of the internal combustion engine and reduce emission. The manifold is intermittently used for injection, valve carbon deposition can be cleaned away by gasoline injected by an air channel, and the problem of valve carbon deposition is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive engines, and particularly to an automotive engine with a dual injection system. Background Art

[0002] A GDI engine, fully known as Gasoline Direct Injection, is an engine technology that directly injects fuel into the combustion chamber for combustion.

[0003] Stratified combustion is an advanced combustion technology where a rich mixture suitable for ignition is distributed around the spark plug at the ignition moment, while the rest of the combustion chamber is a lean mixture.

[0004] In a spray-guided GDI engine, the spark plug and the electromagnetic injector are arranged very close to each other and are located at or near the center of the combustion chamber. Such an arrangement has a simple structure, and it is easy to form a relatively rich mixture around the spark plug and generate an effective mixture stratification within a small space range.

[0005] During cold start, the gasoline injected into the cylinder may not be completely burned, but instead seeps into the crankcase through the piston rings and mixes with the engine oil.

[0006] If the engine temperature is not high enough and the engine oil temperature in the oil pan is low and cannot volatilize the infiltrated gasoline, it will cause the phenomenon of increased engine oil.

[0007] Under certain working conditions, especially at low speed or idle speed, a GDI engine may not be able to achieve complete combustion, resulting in unburned fuel entering the crankcase and mixing with the engine oil, causing engine oil dilution.

[0008] What passes through the intake valve is air and crankcase exhaust gas. The engine oil vapor in the crankcase will adhere to the back of the intake valve and accumulate more and more, resulting in carbon deposition on the intake valve.

[0009] The fuel injector of the GDI engine extends into the cylinder, resulting in no gasoline flowing past the back of the intake valve. Therefore, the self-cleaning ability of gasoline itself, that is, the flushing and cooling effect, is lacking.

[0010] Therefore, it is very necessary to invent an automotive engine device with a dual injection system. Summary of the Invention

[0011] The purpose of the present invention is to provide an automotive engine with a dual injection system to solve the problems of the existing GDI engine, which is prone to engine oil dilution at low speed or idle speed and is prone to carbon deposition due to no gasoline flowing past the back of the intake valve.

[0012] To achieve the above object, the present invention provides the following technical solution: an automotive engine with a dual injection system, comprising an oil delivery system, a single-chip microcomputer, cylinders and a fuel tank, wherein: an intake manifold, an exhaust manifold and a spark plug are provided on the cylinder, valves are installed on each of the intake manifold and the exhaust manifold, the electromagnetic injector is fixedly connected to the inside of the intake manifold and the cylinder respectively through a dual-channel oil distributor nozzle, the electromagnetic injector is communicated with the oil delivery system, and the electromagnetic injector is electrically connected to the single-chip microcomputer;

[0013] The single-chip microcomputer is used to control the magnitude of the current of the electromagnetic coil of the electromagnetic injector;

[0014] A cylinder barrel is fixedly installed at the outer end of the electromagnetic injector near the bottom of the needle valve. One end of the cylinder barrel is a closed end, and the other end is an open end. The open end of the cylinder barrel is communicated with the pressure chamber inside the electromagnetic injector;

[0015] A manifold oil delivery chamber and a cylinder internal oil delivery chamber are formed at one end of the inside of the electromagnetic injector near the bottom of the needle valve. The upper ports of the manifold oil delivery chamber and the cylinder internal oil delivery chamber are both communicated with the inside of the cylinder barrel, and the upper port of the manifold oil delivery chamber is higher than the upper port of the cylinder internal oil delivery chamber;

[0016] The other ports of the manifold oil delivery chamber and the cylinder internal oil delivery chamber are communicated with the inside of the intake manifold and the cylinder respectively through a dual-channel oil distributor nozzle;

[0017] An oil distribution piston column is slidably and sealingly installed inside the cylinder barrel. The top end of the oil distribution piston column is fixedly connected to the needle valve inside the electromagnetic injector;

[0018] The oil distribution piston column is used to block the manifold oil delivery chamber and the cylinder internal oil delivery chamber simultaneously, or to open the manifold oil delivery chamber and the cylinder internal oil delivery chamber separately;

[0019] A manifold oil distribution groove corresponding to the manifold oil delivery chamber is formed on one side of the oil distribution piston column;

[0020] A cylinder internal oil distribution groove corresponding to the cylinder internal oil delivery chamber is formed on the other side of the oil distribution piston column;

[0021] The cylinder internal oil distribution groove is below the manifold oil distribution groove;

[0022] The oil delivery system includes a normal oil path and a high-pressure oil path. The high-pressure oil path is connected in parallel on one side of the normal oil path. The input ends of the normal oil path and the high-pressure oil path are fixedly communicated with the fuel tank, and the output ends of the normal oil path and the high-pressure oil path are fixedly communicated with the oil inlet of the electromagnetic injector.

[0023] The dual-channel oil distributor nozzle includes a connector, a manifold injection pipe and a cylinder internal injection pipe. The manifold injection pipe and the cylinder internal injection pipe are fixedly installed at one end of the connector, and the other end of the connector is fixedly connected to the electromagnetic injector;

[0024] One end of the manifold fuel injection pipe communicates with the manifold fuel delivery chamber, and the other end of the manifold fuel injection pipe is fixedly communicated with the inside of the intake manifold;

[0025] One end of the in-cylinder fuel injection pipe communicates with the in-cylinder fuel delivery chamber, and the other end of the in-cylinder fuel injection pipe is fixedly communicated with the inside of the cylinder.

[0026] A manifold fuel supply pipe and an in-cylinder fuel supply pipe are fixedly installed at the outer end of the electromagnetic fuel injector near the bottom of the needle valve, and the manifold fuel supply pipe and the in-cylinder fuel supply pipe are on both sides of the cylinder barrel;

[0027] One end of the manifold fuel supply pipe is fixedly communicated with the manifold fuel delivery chamber, and the other end of the manifold fuel supply pipe is fixedly communicated with one end of the manifold fuel injection pipe;

[0028] One end of the in-cylinder fuel supply pipe is fixedly communicated with the in-cylinder fuel delivery chamber, and the other end of the in-cylinder fuel supply pipe is fixedly communicated with one end of the in-cylinder fuel injection pipe.

[0029] The common fuel circuit includes a main fuel pipe and a main electromagnetic valve. The main electromagnetic valve is installed on the main fuel pipe. One end of the main fuel pipe is fixedly communicated with the fuel tank, the other end of the main fuel pipe is fixedly communicated with the fuel inlet of the electromagnetic fuel injector, and the main fuel pipe is fixedly communicated with the high-pressure fuel circuit.

[0030] The high-pressure fuel circuit includes a secondary fuel pipe, a secondary electromagnetic valve and a high-pressure fuel pump. The secondary electromagnetic valve and the high-pressure fuel pump are both installed on the secondary fuel pipe. The input end of the secondary fuel pipe is fixedly communicated with the input end of the main fuel pipe, and the output end of the secondary fuel pipe is fixedly communicated with the output end of the main fuel pipe.

[0031] Nozzles are respectively arranged at one ends of the manifold fuel injection pipe and the in-cylinder fuel injection pipe connected to the intake manifold and the cylinder;

[0032] The nozzle on the manifold fuel injection pipe is in the intake manifold and communicates with the manifold fuel supply pipe;

[0033] The nozzle on the in-cylinder fuel injection pipe is above the piston inside the cylinder and communicates with the in-cylinder fuel supply pipe.

[0034] Two one-way valves are arranged at the closed end of the cylinder barrel, one is an intake one-way valve and the other is an exhaust one-way valve.

[0035] The exhaust one-way valve can be communicated with the intake manifold through a pipeline.

[0036] An air hole is opened on the connector, and the air hole is communicated with the intake one-way valve and the outside air of the connector.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] Through the overall arrangement of the present invention, manifold injection can significantly reduce particulate emissions at medium and low loads.

[0039] During cold start and low load conditions, manifold injection is adopted to effectively avoid oil dilution.

[0040] When the temperature is sufficient, direct injection into the cylinder can effectively improve the working efficiency of the internal combustion engine and reduce emissions.

[0041] By intermittently using manifold injection, the valve carbon deposits can be cleaned by the gasoline injected into the air passage, alleviating the problem of valve carbon deposits. Description of the Drawings

[0042] Figure 1 is the overall structural schematic diagram of the present invention.

[0043] Figure 2 is the schematic diagram of the evenly distributed sectional structure of the cylinders of the present invention.

[0044] Figure 3 is the structural schematic diagram of the electromagnetic fuel injector of the present invention.

[0045] Figure 4 is the partial sectional structural schematic diagram of the electromagnetic fuel injector of the present invention.

[0046] Figure 5 is the full sectional structural schematic diagram of the fuel distribution piston column of the present invention.

[0047] Figure 6 is the partial enlarged structural schematic diagram at position A of the present invention.

[0048] Figure 7 is the partial enlarged structural schematic diagram at position B of the present invention.

[0049] In the figure:

[0050] Cylinder 1, intake manifold 2, exhaust manifold 3, piston 4, valve 5, spark plug 6, connector 7, manifold fuel injection pipe 71, in-cylinder fuel injection pipe 72, nozzle 73, electromagnetic fuel injector 8, manifold fuel supply chamber 81, in-cylinder fuel supply chamber 82, cylinder 83, manifold fuel supply pipe 84, in-cylinder fuel supply pipe 85, fuel distribution piston column 86, manifold fuel distribution groove 87, in-cylinder fuel distribution groove 88, fuel tank 9, main fuel pipe 10, auxiliary fuel pipe 11, main electromagnetic valve 12, auxiliary electromagnetic valve 13, high-pressure oil pump 14. Detailed Embodiments

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment:

[0053] As shown in the Figure 1-7 accompanying drawings

[0054] An automotive engine with a dual injection system provided by the present invention includes an oil delivery system, a single-chip microcomputer, a cylinder 1, an electromagnetic injector 8, and a fuel tank 9, wherein: an intake manifold 2, an exhaust manifold 3, and a spark plug 6 are provided on the cylinder 1, valves 5 are installed on each of the intake manifold 2 and the exhaust manifold 3, the electromagnetic injector 8 is fixedly connected to the inside of the intake manifold 2 and the cylinder 1 respectively through a dual-channel oil distributor nozzle, so that a cylinder 1 can achieve manifold injection and in-cylinder injection through an electromagnetic injector 8, thereby reducing the later maintenance cost. The electromagnetic injector 8 is connected to the oil delivery system, and the electromagnetic injector 8 is electrically connected to the single-chip microcomputer;

[0055] The single-chip microcomputer is used to control the magnitude of the current of the electromagnetic coil of the electromagnetic injector 8, and control the telescopic range of the oil distribution piston column 86 through the magnitude of the electromagnetic coil current, so as to realize oil supply through the manifold oil delivery cavity 81 or through the in-cylinder oil delivery cavity 82, thereby performing manifold injection or in-cylinder injection;

[0056] A cylinder barrel 83 is fixedly installed at the outer end of the electromagnetic injector 8 near the bottom of the needle valve, so as to protect the oil distribution piston column 86 through the cylinder barrel 83 and provide the required moving space for the oil distribution piston column 86. One end of the cylinder barrel 83 is a closed end, and the other end is an open end. The open end of the cylinder barrel 83 is communicated with the pressure cavity inside the electromagnetic injector 8, so that the oil in the pressure cavity can enter the corresponding manifold oil delivery cavity 81 and in-cylinder oil delivery cavity 82 through the cylinder barrel 83;

[0057] The inside of the electromagnetic injector 8 is provided with a manifold oil delivery cavity 81 and an in-cylinder oil delivery cavity 82 near one end of the bottom of the needle valve. The upper ports of the manifold oil delivery cavity 81 and the in-cylinder oil delivery cavity 82 are both communicated with the inside of the cylinder barrel 83, so as to change the oil delivery route of the electromagnetic injector 8. The upper port of the manifold oil delivery cavity 81 is higher than the upper port of the in-cylinder oil delivery cavity 82, so that the oil in the pressure cavity can preferentially enter the manifold oil delivery cavity 81 for manifold injection first. When running to the required temperature, let the oil in the pressure cavity enter the in-cylinder oil delivery cavity 82 for in-cylinder injection;

[0058] The other ports of the manifold oil delivery chamber 81 and the in-cylinder oil delivery chamber 82 are respectively communicated with the intake manifold 2 and the inside of the cylinder 1 through a dual-channel oil distributor nozzle, so as to separately deliver the required oil to the inside of the intake manifold 2 and the cylinder 1 through the manifold oil delivery chamber 81 and the in-cylinder oil delivery chamber 82;

[0059] A distributor piston column 86 is slidably and sealingly installed inside the cylinder barrel 83. The top end of the distributor piston column 86 is fixedly connected to the needle valve inside the electromagnetic injector 8, so as to drive the distributor piston column 86 to move through the needle valve, thereby realizing oil supply and oil cut-off;

[0060] Specifically, when oil supply is not required, the electromagnetic coil of the electromagnetic injector 8 is powered off, and the needle valve drives the distributor piston column 86 to reset. At this time, the distributor piston column 86 will block the manifold oil delivery chamber 81 and the in-cylinder oil delivery chamber 82 at the same time;

[0061] Specifically, when manifold injection is required first, the auxiliary electromagnetic valve 13 and the high-pressure oil pump 14 are closed, and the main electromagnetic valve 12 is opened. The current in the electromagnetic coil of the electromagnetic injector 8 is controlled by the single-chip microcomputer to lift the distributor piston column 86 to the required height. For example, a part of the manifold oil distribution groove 87 enters the pressure chamber, and the inlet of the manifold oil delivery chamber 81 is always within the range of the manifold oil distribution groove 87. At the same time, ensure that the in-cylinder oil distribution groove 88 is always in the cylinder barrel 83 and is not communicated with the pressure chamber. At this time, the electromagnetic injector 8 will deliver the oil to the intake manifold 2 through the manifold oil delivery chamber 81 to realize manifold injection;

[0062] When in-cylinder injection is required when running to the required temperature, the main electromagnetic valve 12 is closed, the auxiliary electromagnetic valve 13 and the high-pressure oil pump 14 are opened, and the main electromagnetic valve 12 is opened. The current in the electromagnetic coil of the electromagnetic injector 8 is controlled by the single-chip microcomputer to lift the distributor piston column 86 to the required height. For example, a part of the in-cylinder oil distribution groove 88 enters the pressure chamber, and the inlet of the in-cylinder oil delivery chamber 82 is always within the range of the manifold oil distribution groove 87, and the manifold oil distribution groove 87 is completely in the pressure chamber, so that the inlet of the manifold oil delivery chamber 81 is closed. At this time, the electromagnetic injector 8 will deliver the oil to the cylinder 1 through the in-cylinder oil delivery chamber 82 to realize in-cylinder injection;

[0063] A manifold oil distribution groove 87 corresponding to the manifold oil delivery chamber 81 is provided on one side of the distributor piston column 86, so that the oil in the pressure chamber can only enter the manifold oil delivery chamber 81 through the manifold oil distribution groove 87;

[0064] An in-cylinder oil distribution groove 88 corresponding to the in-cylinder oil delivery chamber 82 is provided on the other side of the distributor piston column 86, so that the oil in the pressure chamber can only enter the in-cylinder oil delivery chamber 82 through the in-cylinder oil distribution groove 88;

[0065] The in-cylinder oil distribution groove 88 is below the manifold oil distribution groove 87 to realize sequential oil supply;

[0066] The fuel delivery system includes a normal fuel circuit and a high-pressure fuel circuit. The high-pressure fuel circuit is connected in parallel on one side of the normal fuel circuit. The input ends of the normal fuel circuit and the high-pressure fuel circuit are fixedly connected to the fuel tank 9, and the output ends of the normal fuel circuit and the high-pressure fuel circuit are fixedly connected to the fuel inlets of the electromagnetic fuel injectors 8; so as to inject fuel into the intake manifold 2 through the normal fuel circuit and inject fuel into the cylinder 1 through the high-pressure fuel circuit.

[0067] In this embodiment, the dual-channel fuel distributor nozzle includes a connector 7, a manifold fuel injection pipe 71 and an in-cylinder fuel injection pipe 72. The manifold fuel injection pipe 71 and the in-cylinder fuel injection pipe 72 are fixedly installed at one end of the connector 7, and the other end of the connector 7 is fixedly connected to the electromagnetic fuel injector 8, such as a bolt connection, so as to replace the electromagnetic fuel injector 8;

[0068] One end of the manifold fuel injection pipe 71 is communicated with the manifold fuel delivery chamber 81, and the other end of the manifold fuel injection pipe 71 is fixedly communicated with the inside of the intake manifold 2, so as to inject fuel into the inside of the intake manifold 2 separately;

[0069] One end of the in-cylinder fuel injection pipe 72 is communicated with the in-cylinder fuel delivery chamber 82, and the other end of the in-cylinder fuel injection pipe 72 is fixedly communicated with the inside of the cylinder 1, so as to inject fuel into the inside of the cylinder 1 separately.

[0070] In this embodiment, a manifold fuel supply pipe 84 and an in-cylinder fuel supply pipe 85 are fixedly installed at the outer end of the electromagnetic fuel injector 8 near the bottom of the needle valve. The manifold fuel supply pipe 84 and the in-cylinder fuel supply pipe 85 are located on both sides of the cylinder barrel 83;

[0071] One end of the manifold fuel supply pipe 84 is fixedly communicated with the manifold fuel delivery chamber 81, and the other end of the manifold fuel supply pipe 84 is fixedly communicated with one end of the manifold fuel injection pipe 71, so as to facilitate disassembly and assembly between them;

[0072] One end of the in-cylinder fuel supply pipe 85 is fixedly communicated with the in-cylinder fuel delivery chamber 82, and the other end of the in-cylinder fuel supply pipe 85 is fixedly communicated with one end of the in-cylinder fuel injection pipe 72, so as to facilitate disassembly and assembly between them.

[0073] In this embodiment, the normal fuel circuit includes a main fuel pipe 10 and a main electromagnetic valve 12. The main electromagnetic valve 12 is installed on the main fuel pipe 10. The main electromagnetic valve 12 is connected to the electronic control system of the vehicle, so as to control the on-off of the main fuel pipe 10 through the main electromagnetic valve 12. One end of the main fuel pipe 10 is fixedly connected to the fuel tank 9, the other end of the main fuel pipe 10 is fixedly connected to the fuel inlet of the electromagnetic fuel injector 8, and the main fuel pipe 10 is fixedly connected to the high-pressure fuel circuit.

[0074] In this embodiment, the high-pressure oil circuit includes a sub-oil pipe 11, a sub-electromagnetic valve 13, and a high-pressure oil pump 14. The sub-electromagnetic valve 13 and the high-pressure oil pump 14 are both installed on the sub-oil pipe 11. The sub-electromagnetic valve 13 and the high-pressure oil pump 14 are connected to the electronic control system of the vehicle, so as to control the on-off of the sub-oil pipe 11 through the sub-electromagnetic valve 13, and at the same time ensure the pressure required for oil injection inside the cylinder 1 through the high-pressure oil pump 14. The input end of the sub-oil pipe 11 is fixedly communicated with the input end of the main oil pipe 10, and the output end of the sub-oil pipe 11 is fixedly communicated with the output end of the main oil pipe 10.

[0075] In this embodiment, spray nozzles 73 are provided at one end of the manifold injection pipe 71 and the in-cylinder injection pipe 72 connected to the intake manifold 2 and the cylinder 1 respectively;

[0076] The spray nozzle 73 on the manifold injection pipe 71 is located in the intake manifold 2 and is communicated with the manifold oil supply pipe 84. The spray nozzle 73 faces one side of the valve 5 inside the intake manifold 2, so as to wash and cool the valve 5 when spraying oil.

[0077] The spray nozzle 73 on the in-cylinder injection pipe 72 is located above the piston 4 inside the cylinder 1 and is communicated with the in-cylinder oil supply pipe 85. The spray nozzle 73 faces the top of the piston 4, so as to spray the oil evenly inside the cylinder 1.

[0078] In this embodiment, two one-way valves are provided at the closed end of the cylinder barrel 83. One is an intake one-way valve. Through the setting of the intake one-way valve, air can enter when the oil distribution piston column 86 is lifted, so as to avoid affecting the lifting of the oil distribution piston column 86. The other is an exhaust one-way valve. Through the setting of the exhaust one-way valve, the air inside the cylinder barrel 83 can be discharged when the oil distribution piston column 86 descends, so as to avoid affecting the descent of the oil distribution piston column 86.

[0079] In this embodiment, the exhaust one-way valve can be communicated with the intake manifold 2 through a pipeline, so that when the cylinder barrel 83 is being filled with oil, the oil can be discharged into the intake manifold 2 to avoid waste.

[0080] In this embodiment, air holes are provided on the connector 7. The air holes are communicated with the intake one-way valve and the outside air of the connector 7, so as to ensure that the oil distribution piston column 86 can be lifted smoothly.

[0081] All kinds of components used in this application document are standard parts. The specific connection methods of each part all adopt conventional means such as mature threads, bolts, and nesting in the prior art. Each structure adopts conventional materials in the prior art, and no specific description will be made here.

[0082] In summary: For the automotive engine with a dual injection system, by adopting manifold injection at medium and low loads, particulate emissions can be significantly reduced. When the engine is cold and at low load, manifold injection is adopted to effectively avoid engine oil dilution. When the temperature is sufficient, direct injection into the cylinder can effectively improve the working efficiency of the internal combustion engine and reduce emissions. By intermittently using manifold injection, the valve carbon deposits can be cleaned by the gasoline injected into the intake port, alleviating the problem of valve carbon deposits.

[0083] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automotive engine with a dual injection system, characterized in that: It includes an oil delivery system, a single-chip microcomputer, a cylinder (1), an electromagnetic fuel injector (8), and a fuel tank (9). Among them: An intake manifold (2), an exhaust manifold (3), and a spark plug (6) are provided on the cylinder (1). Valves (5) are installed on each of the intake manifold (2) and the exhaust manifold (3). The electromagnetic fuel injector (8) is fixedly connected to the inside of the intake manifold (2) and the cylinder (1) respectively through a dual-channel oil distributor nozzle. The electromagnetic fuel injector (8) is connected to the oil delivery system, and the electromagnetic fuel injector (8) is electrically connected to the single-chip microcomputer; The single-chip microcomputer is used to control the magnitude of the current in the electromagnetic coil of the electromagnetic fuel injector (8); A cylinder barrel (83) is fixedly installed at the outer end of the electromagnetic fuel injector (8) near the bottom of the needle valve. One end of the cylinder barrel (83) is a closed end, and the other end is an open end. The open end of the cylinder barrel (83) is communicated with the pressure chamber inside the electromagnetic fuel injector (8); A manifold oil delivery chamber (81) and a cylinder internal oil delivery chamber (82) are provided at one end inside the electromagnetic fuel injector (8) near the bottom of the needle valve. The upper ports of the manifold oil delivery chamber (81) and the cylinder internal oil delivery chamber (82) are both communicated with the inside of the cylinder barrel (83). The upper port of the manifold oil delivery chamber (81) is higher than the upper port of the cylinder internal oil delivery chamber (82); The other ports of the manifold oil delivery chamber (81) and the cylinder internal oil delivery chamber (82) are communicated with the inside of the intake manifold (2) and the cylinder (1) respectively through a dual-channel oil distributor nozzle; A oil distribution piston column (86) is slidably and sealingly installed inside the cylinder barrel (83). The top end of the oil distribution piston column (86) is fixedly connected to the needle valve inside the electromagnetic fuel injector (8); The oil distribution piston column (86) is used to block the manifold oil delivery chamber (81) and the cylinder internal oil delivery chamber (82) simultaneously, or to open the manifold oil delivery chamber (81) and the cylinder internal oil delivery chamber (82) separately; A manifold oil distribution groove (87) corresponding to the manifold oil delivery chamber (81) is provided on one side of the oil distribution piston column (86); A cylinder internal oil distribution groove (88) corresponding to the cylinder internal oil delivery chamber (82) is provided on the other side of the oil distribution piston column (86); The cylinder internal oil distribution groove (88) is below the manifold oil distribution groove (87); The oil delivery system includes a normal oil circuit and a high-pressure oil circuit. The high-pressure oil circuit is connected in parallel on one side of the normal oil circuit. The input ends of the normal oil circuit and the high-pressure oil circuit are fixedly communicated with the fuel tank (9). The output ends of the normal oil circuit and the high-pressure oil circuit are fixedly communicated with the oil inlet of the electromagnetic fuel injector (8).

2. The automotive engine with a dual injection system according to claim 1, characterized in that: The dual-channel oil distributor nozzle includes a connector (7), a manifold spray oil pipe (71), and a cylinder internal spray oil pipe (72). The manifold spray oil pipe (71) and the cylinder internal spray oil pipe (72) are fixedly installed at one end of the connector (7). The other end of the connector (7) is fixedly connected to the electromagnetic fuel injector (8); One end of the manifold spray oil pipe (71) is communicated with the manifold oil delivery chamber (81), and the other end of the manifold spray oil pipe (71) is fixedly communicated with the inside of the intake manifold (2); One end of the in-cylinder fuel injection pipe (72) is in communication with the in-cylinder fuel delivery chamber (82), and the other end of the in-cylinder fuel injection pipe (72) is fixedly communicated with the inside of the cylinder (1).

3. The automotive engine with a dual injection system according to claim 2, characterized in that: A manifold fuel supply pipe (84) and an in-cylinder fuel supply pipe (85) are fixedly installed at the outer end of the electromagnetic fuel injector (8) near the bottom of the needle valve. The manifold fuel supply pipe (84) and the in-cylinder fuel supply pipe (85) are on both sides of the cylinder barrel (83); One end of the manifold fuel supply pipe (84) is fixedly communicated with the manifold fuel delivery chamber (81), and the other end of the manifold fuel supply pipe (84) is fixedly communicated with one end of the manifold fuel injection pipe (71); One end of the in-cylinder fuel supply pipe (85) is fixedly communicated with the in-cylinder fuel delivery chamber (82), and the other end of the in-cylinder fuel supply pipe (85) is fixedly communicated with one end of the in-cylinder fuel injection pipe (72).

4. The automotive engine with a dual injection system as claimed in claim 3, wherein: The ordinary oil circuit includes a main oil pipe (10) and a main electromagnetic valve (12). The main electromagnetic valve (12) is installed on the main oil pipe (10). One end of the main oil pipe (10) is fixedly communicated with the fuel tank (9), and the other end of the main oil pipe (10) is fixedly communicated with the oil inlet of the electromagnetic fuel injector (8). The main oil pipe (10) is fixedly communicated with the high-pressure oil circuit.

5. The automotive engine with a dual injection system according to claim 4, characterized in that: The high-pressure oil circuit includes a secondary oil pipe (11), a secondary electromagnetic valve (13) and a high-pressure oil pump (14). The secondary electromagnetic valve (13) and the high-pressure oil pump (14) are both installed on the secondary oil pipe (11). The input end of the secondary oil pipe (11) is fixedly communicated with the input end of the main oil pipe (10), and the output end of the secondary oil pipe (11) is fixedly communicated with the output end of the main oil pipe (10).

6. The automotive engine with a dual injection system according to claim 2, characterized in that: Nozzles (73) are provided at one ends of the manifold fuel injection pipe (71) and the in-cylinder fuel injection pipe (72) connected to the intake manifold (2) and the cylinder (1); The nozzle (73) on the manifold fuel injection pipe (71) is in the intake manifold (2) and is in communication with the manifold fuel supply pipe (84); The nozzle (73) on the in-cylinder fuel injection pipe (72) is above the piston (4) inside the cylinder (1) and is in communication with the in-cylinder fuel supply pipe (85).

7. The automotive engine with a dual injection system according to claim 1, characterized in that: Two one-way valves are provided at the closed end of the cylinder barrel (83), one is an intake one-way valve and the other is an exhaust one-way valve.

8. The automotive engine with a dual injection system according to claim 7, characterized in that: The exhaust one-way valve can be communicated with the intake manifold (2) through a pipeline.

9. The automotive engine with a dual injection system according to claim 7, characterized in that: An air hole is provided on the connector (7), and the air hole is in communication with the intake one-way valve and the air outside the connector (7).

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