A methanol-high pressure oxygen compound two-stroke engine and its control method

Abstract

The invention discloses a methanol-high-pressure oxygen composite two-stroke engine, which is composed of one or more than one cylinder group, each cylinder group includes a main cylinder and a corresponding auxiliary cylinder, the main cylinder is provided with a starting fuel nozzle, The methanol nozzle, the oxygen nozzle and the exhaust valve of the main cylinder do not have an intake valve. There is a connecting channel between the exhaust port of the main cylinder and the auxiliary cylinder. The connecting channel has a one-way valve at the entrance of the auxiliary cylinder. The one-way valve can only The gas in the main cylinder flows into the auxiliary cylinder. The auxiliary cylinder does not have a fuel nozzle, but is equipped with an inlet valve of the auxiliary cylinder and an exhaust valve of the auxiliary cylinder. Control the amount of oxygen injected by the main cylinder, control the degree of fuel combustion, introduce the high-temperature active gas that has not been completely burned in the main cylinder into the auxiliary cylinder to continue burning, realize the cycle of separate cylinders, reduce the emission of harmful gases, and realize the full combustion of fuel.

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] like 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] like 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 cylind...

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] like 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] like 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 cylind...

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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