The successful development of 6DK-28 diesel engine of Zhongchai Heavy Industry Co., Ltd.

Recently, the first 6DK-28 diesel engine, developed and manufactured by Zhongchai Heavy Industry Co., Ltd. — a subsidiary of China Shipbuilding Industry Corporation (CSIC), successfully passed the approval from the China Classification Society and shipowners. This achievement marks a significant milestone in the localization of this type of diesel engine, showcasing the company's growing technical capabilities. The DK-28 series was originally developed by Shaanxi Diesel Heavy Industry Co., Ltd., incorporating patented technology from Japan’s Daihatsu Diesel Engine Co., Ltd. Prior to this, the company had already localized the 8DK-28 model, which achieved strong market performance. To further expand its product range and strengthen its position in the marine engine industry, Shaanxi Chai Heavy Industry initiated the localization project for the 6DK-28 engine as part of its long-term strategic plan. During the development of the 6DK-28, engineers and technicians built upon their previous experience with the 8DK-28 model, thoroughly studying and integrating its technologies. The production team faced numerous challenges but overcame them through perseverance and innovation. They successfully completed the machining, assembly, and commissioning of the engine. After undergoing rigorous testing—including bench running-in tests, machine tests, back pressure tests, and exhaust smoke tests—the engine met all required technical specifications and received official approval from both the China Classification Society and shipowners. With a compact design and superior performance, the 6DK-28 diesel engine has a rated power of 1,912 kW and a maximum power output of 2,100 kW. It is ideal for use as a main engine in container ships ranging from 500 to 600 TEU. The successful development of this engine filled a critical gap in Shaanxi Diesel Heavy Industry’s product line, enriching its engine series and strengthening its position in the ship propulsion market. Currently, Shaanxi Chai Heavy Industry offers eight series of diesel engines, with bore diameters ranging from 220 to 400 mm, speeds between 390 to 1,500 rpm, and power outputs from 552 kW to 8,800 kW. These engines are widely used in ships with power ratings from 500 kW to 6,000 kW, as well as onshore generator sets. The company has become one of the largest domestic suppliers of medium-speed main engines, playing a vital role in supporting China’s maritime industry.

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