Auto parts: EFI technology extends to the field of small diesel engines

According to relevant regulations, China fully implemented the national 3 emission standard in 2008. As far as new products are concerned, the national 3 standard model is the product of the diesel engine enterprise in 2007. After preparations in recent years, the national diesel engines of major diesel engines such as Yuchai, Weichai, Xichai, Dachai, Chaochai and Dongfeng Cummins have been serialized, and the national 3 technology has transitioned from a conceptualized and trial-type to a practical stage.

Heavy-duty diesel engines have little problem in responding to the national 3 emission standards. It is worth noting that some small and medium-sized diesel engine-based engine companies also started the national 3 standard diesel engines in 2007, indicating that these companies are not only aligning their models with light trucks, In addition to light passengers, it also provided technical reserves for the future emission reduction standards of small diesel engines. It is another overall breakthrough for the diesel engine enterprises in this group after the transition to multi-cylinder machines. The extension of the National 3 standard diesel engine to the small diesel engine field will make the cost of the high-end in this field even more prominent.

Yangchai has jointly developed the National 3 standard diesel engine through cooperation with AVL. At present, Yangchai has successfully developed YZ4DB1-30 and YZ4DA1-30 engines using electronically controlled unit pump technology and passed the national 3 product system. These two national 3 diesel engines have successfully entered the passenger car market. Quanchai has been a supplier of Beiqi Foton, FAW Hongta and Jianghuai. In 2007, in order to further accelerate the upgrading of products, Quanchai cooperated with Bosch and Shanghai Internal Combustion Engine Research Institute to successfully develop 4D22E and 4D37E 3 series small bore cars. A diesel-powered vehicle with a large range of light-duty trucks. Changchai's 300,000-unit multi-cylinder base (Phase I) project was put into operation on December 28, 2007, mainly producing 3, 4 multi-cylinder diesel engines.

The first phase of the project will have a total investment of 160 million yuan. After completion, the multi-cylinder machine product grade will be upgraded in an all-round way. The 4B28TC common rail diesel engine of this ignition is based on the technical evaluation of Austrian AVL company and is completed by Bosch common rail system. of.

Light commercial vehicles are the most difficult sector to implement the National 3 standard. According to Ni Hongjie, chairman of the China Internal Combustion Engine Industry Association, there are currently two problems in implementing the country 3. One is the oil problem. Many small and medium-sized cities have difficulty in supplying oil. After China’s national standard diesel engine uses ordinary standard vehicle diesel, its Emission standards are lower than those of the country 3, but higher than the country 2, which has a certain degree of impact on the life of engine components. The other is the cost problem. In terms of the electronic injection system, whether it is a common rail system or a single pump system, the cost will increase a lot, which is acceptable for heavy-duty vehicles, but for light-duty vehicles, the engine factory If a common rail system is to be used, the current price of a Bosch company's common rail system is between 6,000 yuan and 8,000 yuan. How much does a four-cylinder light-duty engine sell? That is 6,000 yuan, and some even lower. To four or five thousand yuan, if the common rail system is used, the cost of the engine will double, and the automobile factory can't accept it, because a light-duty vehicle will sell for 30,000 yuan or 40,000 yuan in the market.

Of course, the common rail system developed by domestic manufacturers has also come out, but it has not yet formed a batch. In addition, domestic manufacturers are using lower-cost fuel injection solutions. Overall, although there are still several months away from the implementation of the national 3 emission standards for light vehicles, the difficult situation of cost factors cannot be fundamentally mitigated.

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