Millions of IPs create science and technology talents to strengthen the country丨The development of engine technology in the new energy field helps the industry's green transformation

As the most widely used power machinery with the highest thermal efficiency, low carbon emissions throughout the life cycle, easy use, good durability, and wide application, the internal combustion engine is widely used in rail transportation, ships, nuclear power and other fields. In the process of green transformation and development, realizing the transformation of modern internal combustion engines and using new energy fuels such as biomass fuels and renewable energy synthetic fuels are important paths to achieve "carbon neutrality". Ammonia, as a renewable carbon-free fuel, is a relatively ideal alternative energy source. This article takes you to review the series of achievements we have made and the series of explorations we have carried out in the process of green development in recent years.

(Photo courtesy of CRRC Dalian Locomotive and Rolling Stock Co., Ltd.)

CRRC Dalian Locomotive and Rolling Stock Co., Ltd. (hereinafter referred to as "CRRC Dalian"), as a leading enterprise in China's railway engines, has been committed to seeking breakthroughs in engine technology in the field of new energy. On November 30, 2023, the medium-speed, high-power 12V240H-DFA ammonia fuel engine independently developed by CRRC Dalian was successfully ignited. This indicates that my country has mastered the key technologies of ammonia fuel engines and has also achieved full industrial chain collaboration of ammonia fuel engines from components to application scenarios.

This ammonia fuel engine has many advantages. First, its single-cylinder power can reach 208kW, and the proportion of ammonia energy reaches 85%, which can reduce carbon emissions by 80%, and the emissions meet the national standard for the second stage. Secondly, the engine uses advanced ammonia low-pressure electronically controlled multi-point injection and diesel high-pressure electronic injection technology to ensure precise control of fuel supply. In addition, by adopting a VTG supercharger, precise control of the air-fuel ratio within the operating range is achieved. In terms of safety, the engine is equipped with multiple safety protection systems such as dual ECU, knock control and misfire control to ensure the inherent safety of the engine.

In addition to technological breakthroughs, CRRC Dalian also focuses on intelligent control of engines. They have developed a special ammonia fuel engine control system and a complete safety protection system, which not only improves the operating efficiency of the engine, but also ensures its safety during use and maintenance.

This is of great significance for promoting the upgrading of the traditional engine industry and advancing the carbon-free process of internal combustion engines. It not only drives the innovation and upgrading of the upstream and downstream industrial chains, but also contributes to the comprehensive green transformation of my country's power equipment.

In the future, CRRC Dalian will continue to adhere to self-reliance in science and technology and be committed to leading the development of rail transit equipment. They will accelerate the cultivation of new quality productivity represented by new energy engines and further promote the green, low-carbon and intelligent transformation of power equipment. At the same time, they will also conduct in-depth technical research on alternative fuel engines such as methanol and hydrogen, and promote the technological innovation of zero-carbon emission engines in a diversified manner. Through these efforts, CRRC Dalian is expected to form new landmark achievements in the field of clean energy equipment in my country and contribute "green" wisdom to the construction of a strong transportation country.

Text: Lv Xiaodong, Wu Jiashun, Yu Miao, CRRC Dalian Locomotive and Rolling Stock Co., Ltd.

Auditor: Fu Di, CRRC Dalian Locomotive and Rolling Stock Co., Ltd.