Methanol-high-pressure-oxygen compound two-stroke engine and control method thereof

Abstract

The invention discloses a methanol-high-pressure-oxygen compound two-stroke engine. The methanol-high-pressure-oxygen compound two-stroke engine is composed of one or more air cylinder groups, each air cylinder group comprises a main air cylinder and a corresponding auxiliary air cylinder, and the main air cylinders are provided with starting fuel nozzles, methanol nozzles, oxygen nozzles and mainair cylinder exhaust valves and are not provided with air inlet valves; and connection channels are arranged between main air cylinder exhaust ports and the auxiliary air cylinders, the connection channels are provided with one-way valves at auxiliary air cylinder inlets, air in the main air cylinders only flows into the auxiliary air cylinders through the one-way valves, the auxiliary air cylinders are not provided with fuel nozzles and are provided with auxiliary air cylinder air inlet valves and auxiliary air cylinder exhaust valves, and the auxiliary air cylinder air inlet valves communicate with an engine air inlet pipe. Methanol is injected into the main air cylinders, the amount of oxygen injected in the main air cylinders is controlled, the degree of fuel combustion is controlled,high-temperature active air which is not completely burned in the main air cylinders is introduced into the auxiliary air cylinders to continue combustion, the cylinder-dividing circulation is achieved, the emission of harmful air is reduced, and the full combustion of fuel is achieved.

Description

technical field

[0001] The invention belongs to the field of two-stroke engines, relates to methanol-oxygen compound engine technology, and is a two-stroke engine technology that utilizes the energy of methanol fuel and high-pressure oxygen to reduce engine emission pollution and improve engine working efficiency. Background technique

[0002] As the number of automobiles continues to rise, my country's dependence on foreign oil is getting worse. Under the current situation of tight energy supply and sharp increase in environmental protection pressure, how to improve engine efficiency and reduce engine emission pollution has become the focus of the entire engine academic circle and even the entire society. , research hotspots, carried out such as: Atkinson (Atkinson) cycle engine, two-stroke engine, Miller (Mill) cycle engine and other related research, put forward "partial premixed compression ignition" (PCCI) technology, "reaction control pressure Combustion" (RCCI) technolo...

Examples

example 1

[0064] Below, comprehensive reference figure 1 The methanol-high pressure oxygen compound two-stroke engine of the present invention will be described in detail.

[0065] Such as figure 1 As shown, in the methanol-high-pressure oxygen composite two-stroke engine of the present invention, there is a cylinder group composed of a crank connecting rod mechanism, a gas distribution mechanism and a fuel supply system, a lubrication system, a cooling system, a starting system, and an oxygen injection system And ECU (control unit); wherein, the cylinder group is composed of a main cylinder 2 and an auxiliary cylinder 11.

[0066] Such as figure 1 As shown, in the methanol-high pressure oxygen composite two-stroke engine of the present invention, the main cylinder 2 is provided with a starting fuel nozzle 4, a methanol nozzle 3, an oxygen nozzle 5 and a main cylinder exhaust valve 6, and no intake valve , There is a connecting passage 7 between the main cylinder 2 and the auxiliary ...

Embodiment 2

[0107] The methanol-high-pressure oxygen composite two-stroke engine of the present invention is composed of two groups of identical cylinder groups, the main cylinder piston in the first cylinder group and the master cylinder piston in the second cylinder group have a working phase difference of 180°CA, and the starting fuel adopts dimethicone Ether; such as figure 1 As shown, it is a cylinder group in the cylinder group of the engine. Its valve mechanism adopts variable valve timing technology, and the number of exhaust valves in the main cylinder is two, so as to increase the exhaust volume of the main cylinder and shorten the exhaust time. . The control method of this engine is basically the same as that of Example 1, but it can automatically adjust the crankshaft angle corresponding to the opening and closing of the intake valve of the main cylinder according to the engine speed, load, and temperature changes, and automatically adjust the intake valve and exhaust of the a...

technical field

[0001] The invention belongs to the field of two-stroke engines, relates to methanol-oxygen compound engine technology, and is a two-stroke engine technology that utilizes the energy of methanol fuel and high-pressure oxygen to reduce engine emission pollution and improve engine working efficiency. Background technique

[0002] As the number of automobiles continues to rise, my country's dependence on foreign oil is getting worse. Under the current situation of tight energy supply and sharp increase in environmental protection pressure, how to improve engine efficiency and reduce engine emission pollution has become the focus of the entire engine academic circle and even the entire society. , research hotspots, carried out such as: Atkinson (Atkinson) cycle engine, two-stroke engine, Miller (Mill) cycle engine and other related research, put forward "partial premixed compression ignition" (PCCI) technology, "reaction control pressure Combustion" (RCCI) technolo...

Examples

example 1

[0064] Below, comprehensive reference figure 1 The methanol-high pressure oxygen compound two-stroke engine of the present invention will be described in detail.

[0065] Such as figure 1 As shown, in the methanol-high-pressure oxygen composite two-stroke engine of the present invention, there is a cylinder group composed of a crank connecting rod mechanism, a gas distribution mechanism and a fuel supply system, a lubrication system, a cooling system, a starting system, and an oxygen injection system And ECU (control unit); wherein, the cylinder group is composed of a main cylinder 2 and an auxiliary cylinder 11.

[0066] Such as figure 1 As shown, in the methanol-high pressure oxygen composite two-stroke engine of the present invention, the main cylinder 2 is provided with a starting fuel nozzle 4, a methanol nozzle 3, an oxygen nozzle 5 and a main cylinder exhaust valve 6, and no intake valve , There is a connecting passage 7 between the main cylinder 2 and the auxiliary ...

Embodiment 2

[0107] The methanol-high-pressure oxygen composite two-stroke engine of the present invention is composed of two groups of identical cylinder groups, the main cylinder piston in the first cylinder group and the master cylinder piston in the second cylinder group have a working phase difference of 180°CA, and the starting fuel adopts dimethicone Ether; such as figure 1 As shown, it is a cylinder group in the cylinder group of the engine. Its valve mechanism adopts variable valve timing technology, and the number of exhaust valves in the main cylinder is two, so as to increase the exhaust volume of the main cylinder and shorten the exhaust time. . The control method of this engine is basically the same as that of Example 1, but it can automatically adjust the crankshaft angle corresponding to the opening and closing of the intake valve of the main cylinder according to the engine speed, load, and temperature changes, and automatically adjust the intake valve and exhaust of the a...

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