Air-cylinder-exterior cold water and air-cylinder-interior hot water integrated double injection diesel engine structure

Abstract

The invention relates to an air-cylinder-exterior cold water and an air-cylinder-interior hot water integrated double injection diesel engine structure. The air-cylinder-exterior cold water and the air-cylinder-interior hot water integrated double injection diesel engine structure includes a diesel engine body, an inlet manifold, an exhaust manifold, an air-cylinder-interior sprinkler and an oil atomizer which are arranged in the diesel engine body, a high pressure water pump unit which communicates with the air-cylinder-interior sprinkler, an air-cylinder-exterior sprinkler which is arrangedin the inlet manifold, a low pressure water pump unit which communicates with the air-cylinder-exterior sprinkler, a heat exchanger which is arranged between the low pressure water pump unit and the high pressure water pump unit, and an electronic controller which is electrically connected with the oil atomizer, the air-cylinder-interior sprinkler, the high pressure water pump unit, the air-cylinder-exterior sprinkler and the low pressure water pump unit. Compared with the prior art, according to the air-cylinder-exterior cold water and the air-cylinder-interior hot water integrated double injection diesel engine structure, hot water sprayed in the air cylinder is rapidly vaporized and the energy is absorbed, the temperature in the air cylinder nearby the combustion top dead center can belowered, and the emission of NOx can be reduced; cold water is sprayed to the inlet manifold at the same time, heat energy is absorbed through evaporation of water, the gas temperature entering the air cylinder is decreased, and the air inlet density is increased; and the charging efficiency is increased, the output per liter of the diesel engine is improved, and the dynamic property is improved.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines and relates to a diesel engine structure with cold water outside the cylinder and hot water in the cylinder mixed with double injection. Background technique [0002] The rapid development of motor vehicle technology has brought great convenience to human society, but it has also brought a series of negative effects such as energy and environmental pollution. The energy consumption of motor vehicles has received widespread attention, and fuel consumption and emission standards have become increasingly stringent. Energy saving and emission reduction has become the main theme of the development of the motor vehicle industry. [0003] In order to further improve the working efficiency of motor vehicles and reduce energy consumption, the technology of supercharging and miniaturization of internal combustion engines has been proposed. The miniaturization technology of internal com...

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Problems solved by technology

However, the exhaust gas discharged from the cylinder takes away about one-third of the heat in the cylinder. At present, spraying cold water into the cylinder can reduce the end-of-compression temperature in the cylinder and reduce NO x emissions, but still does not solve the problem of a large amount of heat loss in the exhaust gas in the cylinder. The exhaust gas wastes a lot of energy consumption, which limits the further improvement of the thermal efficiency of the diesel engine.

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