A single-valve four-stroke internal combustion engine

Abstract

The invention provides a single-valve four-stroke internal combustion engine. The single-valve four-stroke internal combustion engine comprises a piston, a cylinder, fuel injectors, a cylinder head and a valve. The cylinder is fixedly connected with the cylinder head. A gas flow passageway is arranged in the cylinder head. The gas flow passageway is composed of an intake way, an exhaust way and a cooling gas way which communicate with one another. An intake valve is arranged in the intake way. An exhaust valve is arranged in the exhaust way. A cooling valve is arranged in the cooling gas way. The piston moving in a reciprocating manner is mounted in the cylinder. The valve is mounted in the cylinder head and coaxial with the piston. Multiple first through holes are formed in the valve. The multiple fuel injectors are mounted in the cylinder head. When the valve interrupts the interior of the cylinder and the gas flow passageway through the reciprocating motion, the fuel injectors are in sealed fit with the first through holes in a one-to-one corresponding manner. By the adoption of the single-valve four-stroke internal combustion engine, the mass and the reciprocating inertial force of the valve can be reduced, the oil-gas mixing is more uniform, the combustion of fuel is more sufficient, and the fuel economy and harmful matter discharge are improved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a single-valve four-stroke internal combustion engine. Background technique [0002] For a long time, people have proposed various improvement methods to improve the thermal efficiency of internal combustion engines, reduce fuel consumption and pollutant emissions. [0003] In order to increase intake as much as possible and reduce intake and exhaust resistance, internal combustion engines usually use multi-valve valve trains. However, the structure of the multi-valve valve train is complicated, the failure rate is high, the manufacturing cost increases, the maintenance is inconvenient, and the effect is not ideal enough. In the existing single-valve engine or single-valve valve train, such as patent application number 201610426170.5, a single-valve engine, although increasing the diameter of the valve and air passage can improve the intake air, but the mass ...

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Problems solved by technology

[0006] It is difficult for the existing internal combustion engine structure to adapt to the increasingly stringent emission regulations, especially the National VI. If the structure of the internal combustion engine is not improved, the internal combustion engine will face greater challenges in the future

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