Diesel pressurization-liquid ammonia direct injection dual-fuel injector

Abstract

The invention aims to provide a diesel pressurization-liquid ammonia direct injection dual-fuel injector which comprises an injector body, a liquid ammonia injection part and a diesel injection part, and the liquid ammonia injection part and the diesel injection part are located in the injector body. The liquid ammonia injection part comprises a pressurization module, a first pressure storage resonance current limiting module, a super-hysteresis electromagnetic control actuator and a phase change controllable super-atomization nozzle module which are arranged from top to bottom; the diesel oil injection part comprises a second pressure accumulation resonance current limiting module, an auxiliary pressurization module, a pressure balance type electromagnetic control actuator and a needle valve eccentric self-adjusting nozzle which are arranged from top to bottom. The injection process is combined with thermal management design, and phase change conversion of ammonia fuel is controlled by adjusting from the two aspects of pressure and temperature. Ammonia fuel is sprayed into the air cylinder in a high-pressure liquid state, and sufficient combustion is achieved. And a multi-valve cooperative control form is adopted, so that the liquid ammonia injection process is circularly variable, and the injection quantity and the injection timing are more accurate and flexible.

Description

technical field [0001] The present invention relates to an injector, in particular a dual fuel injector. Background technique [0002] According to statistics, ship emissions account for about 3% of global carbon emissions. Therefore, on April 13, 2018, IMO passed the carbon emission reduction target. By 2050, carbon emissions will be halved compared with 2008, and by the end of this century, zero emissions will be achieved. The route pre-study will be carried out from 2016 to 2022, and the rules will enter the substantive implementation stage based on the research results in 2023. Technically, there are many ways to reduce carbon emissions, but to achieve the goal of zero emissions, the only way to start with fuel is to solve the emission problem fundamentally from the source. Therefore, research on ship alternative fuels has become one of the research hotspots in the field of ship power in recent years. The research and application of new low-carbon alternative fuels for ...

AI Technical Summary

Problems solved by technology

However, on the one hand, there is currently no mature ammonia fuel injector. On the other hand, the single combination of diesel injector and ammonia fuel injector will cause energy waste, and it is difficult to form the precise control of multiple injections unique to the common rail system. Advantages of flexible and controllable rate

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