A high-temperature water sprayer for spraying water in engine cylinder

Abstract

The invention relates to a high-temperature water sprayer for spraying water into an engine cylinder. The high-temperature water sprayer for spraying water into the engine cylinder comprises a water sprayer body. The water sprayer body is provided with a water inlet pipe connector, a water inlet pipe, a pressure chamber, a water return pipe connector, a pressure regulating screw, a pressure regulating spring, an ejection rod and a needle valve, and a gap between the ejection rod, the pressure regulating spring, the pressure regulating screw and the water sprayer forms a water return channel. A cooling water guiding-in pipe is arranged in the water sprayer body and communicates with the water return channel. Cooling water is guided into the cooling water guiding-in pipe, flows through the water return channel and then enters the water return pipe together with high-temperature return water through the water return pipe connector. Compared with the prior art, the cooling water guiding-in pipe is adopted by the water sprayer for internal cooling, the ejection rod is cooled directly, the return water temperature is decreased, the cooling efficiency is high, and the situation that the needle valve gets stuck due to heating deformation of the ejection rod, and consequentially the water sprayer cannot work normally is avoided; and the structure is simple, a cooling loop does not need to be additionally arranged, the reliability of the high-temperature water sprayer is improved, and long-time stable work of the high-temperature water sprayer is achieved.

Description

technical field [0001] The invention relates to the technology of spraying water in an engine cylinder, in particular to a high-temperature water sprayer for spraying water in an engine cylinder. Background technique [0002] The rapid development of the automobile industry has brought great convenience to human society. While automobiles bring convenience to human society, they also bring a series of negative effects such as energy and environmental pollution. For this reason, all countries have formulated strict emission and fuel consumption standards, and energy saving and emission reduction are the primary goals of the internal combustion engine industry as the main power source of automobiles. In order to reduce the fuel consumption of internal combustion engines and reduce the consumption of fossil energy, engineers, scholars and practitioners in the internal combustion engine industry have made great efforts. [0003] The engine miniaturization technology can increa...

AI Technical Summary

Problems solved by technology

[0005] The temperature of the high-temperature water sprayed by the high-temperature sprinkler will be as high as 200°C or even higher. This part of the high-temperature return water heats the needle valve coupler and the ejector rod, which makes the needle valve coupler and ejector rod bear a huge heat load. It is made of high-speed steel The thermal stability of the needle valve and the needle valve body made of impact-resistant high-quality alloy steel is much better than that of the ejector rod made of ordinary stainless steel. Compared with the needle valve pair, the material of the ejector rod has poor thermal stability. It is easy to be deformed by heat, causing the needle valve to stick and the sprinkler to fail to work normally

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