In early 2010, Tianjin, Beijing and other places suddenly dropped heavy snowfall. The minimum temperature suddenly dropped to -20°C. Many buses stopped because the engine could not start. However, there was no problem with the 651 road from Tanggu to Tianjin, and as always, the quasi-point operation was normal. The 25 buses of No. 651 Road, including Xiamen Golden Dragon, Suzhou Golden Dragon, and Zhengzhou Yutong, are equipped with Dongfeng Cummins ISDe series diesel electronically controlled engines. According to the captain of the bus company’s fleet, the 25 buses were purchased by the Tianjin Binhai Bus Company in September 2007. They mainly ran the Tang’s 651 line to Tianjin’s downtown area and have been in operation for more than two years now. The engine has not appeared once. malfunction. The climate conditions in the north are rather special. In winter, the temperature is low, and the requirements for the engine are particularly high. “We selected the Dongfeng Cummins Engine because it was a big brand and its reputation was good. Second, it was reliable and it rarely failed. The heavy snow in Tianjin also proved this.†Compared to gasoline engines, the operating environment of diesel engines is more complex and diverse. In this regard, Bai Yun, deputy general manager of Dongfeng Cummins Engine Co., Ltd., explained that “we cannot change the environment, nor can we guarantee that the engine must be used in a normal environment. Therefore, we have made it clear during product development that only products that can adapt to all environments are available. It is a product needed by the market.†Therefore, in developing each product, Dongfeng Cummins first needs to undergo long-term and extensive performance tests to fully expose the engine's defects and potential hidden dangers, and then pass them again and again. Improvement until all kinds of new and old issues no longer appear. After loading the prototype, it will pass various road tests with extreme conditions such as alpine, dry heat, hot and humid, etc., and finally make the product fully meet the design goals. It is understood that the Dongfeng Cummins product road test, the coldest to Mohe, Heilongjiang, the minimum temperature of -36.3 °C; the hottest to Xinjiang Turpan. The 100-year-old Cummins engine products are all over the world, and various unconventional geographical and climatic conditions may occur in the Cummins product distribution area, so Cummins will consider them in the R&D process. This is also an important reason why the Dongfeng Cummins Engine worked as usual in this heavy snowfall. In terms of product reliability, Dongfeng Cummins has a unique advantage: its engine is less than 20% of the engine parts of other manufacturers, not only the engine size is smaller, the vehicle space is saved, and more importantly, the connecting parts between components. Less, the probability of generating friction loss is greatly reduced, and the probability of failure is also reduced a lot. Users of Tianjin Binhai Bus Company stated that if Tianjin Binhai Bus Company needs to add new buses later, Dongfeng Cummins Engine is still their first choice. Kapaco Automotive Parts Co., Ltd. , http://www.hz-autoparts.com