Internal combustion engine

Abstract

The invention discloses an internal combustion engine. The internal combustion engine comprises an engine body, an electric heater plug or a spark plug and a fuel injection system; the engine body comprises a cylinder block and a cylinder cover; the fuel injection system comprises a fuel injection pump and an oil injector; the fuel injection pump comprises a pump body and a plunger; the pump bodyis provided with a plunger hole and a first lubricating channel; the first lubricating channel penetrates through the pump body from the outside of the pump body and leads to the plunger hole; an outlet, at the plunger hole, of the first lubricating channel faces the plunger; the oil injector comprises an oil injector body and a needle valve; the oil injector body is provided with a needle valve hole and a second lubricating channel; the second lubricating channel penetrates through the oil injector body from the outside of the oil injector body and leads to the needle valve hole; and an outlet, at the needle valve hole, of the second lubricating channel faces the needle valve. The internal combustion engine has the advantages that when low-viscosity fuel is used for combustion, the defects that the low-viscosity fuel cannot achieve self-lubricating and self-sealing can be overcome, an additive does not need to be added into the low-viscosity fuel, and therefore the generation of new emission pollutants can be avoided, and the internal combustion engine can meet the emission standard.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an internal combustion engine. Background technique [0002] The internal combustion engine is a kind of power machinery, which is a heat engine that burns fuel inside the machine and converts the heat energy it releases directly into power. Internal combustion engines are widely used in all walks of life in the national economy, such as automobiles, agricultural machinery, engineering machinery, ships, trains, aviation, ships and chariots. [0003] Existing internal combustion engines can be divided into gasoline engines, diesel engines, etc. according to the fuel used. Among them, gasoline engines use gasoline as fuel, and diesel engines use diesel as fuel. The viscosity of gasoline is less than that of diesel (3kg / m s to 8kg / m s). , is a low-viscosity fuel compared to diesel. With the decrease of petroleum energy and the seriousness of environmental pollution, it is urgent ...

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Problems solved by technology

[0006] The problem to be solved by the present invention is: when the existing diesel internal combustion engine uses low-viscosity fuel, it is prone to wear of the plunger of the fuel injection pump, wear of the needle valve of the injector, fuel leakage, and difficulty in starting. The viscosity of the fuel is less than that of diesel, which can be alternative fuels such as methanol, ethanol, dimethyl ether, and gasoline

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