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Since the beginning of 2009, China National III emission standards have been enforced in the field of commercial vehicles. Previously, the industry-recognized state-of-the-art technology has high pressure common rails, single pump and pump nozzles, which are collectively referred to as electronically controlled injection engine technology. Until China National Heavy Duty Truck launched the The industry drama is called "SAR (non-typical)" mechanical pump + EGR route. That is, the use of electromagnets to control the second mechanical pump, made simple electronic fuel injection pump plus EGR exhaust gas reprocessing system to reduce emissions. In the laboratory In the environment, the EGR engine can meet the three national standards; but in actual use, it is easy to fake.
Due to the low cost, heavy-duty EGR vehicles once surged in sales volume, but then, the high fuel consumption of SARS engines, the problem of poor discharge gradually exposed. The reason is that it can not precisely control the fuel injection amount and injection time. And therefore, a The nation's three SARS technologies that have been hailed as "technological innovation" have caused great criticism in various aspects. On the one hand, the high fuel consumption of vehicles and the immature technology lead to unstable quality. In spite of the low price of vehicles, they have given users of EGR vehicles instead. Bring higher economic losses; on the Other hand, some users shut down the EGR device to reduce fuel consumption, resulting in high pollutant emissions, and even some unscrupulous companies, using loopholes that cannot be easily identified by the EGR engine and the Guoji engine, are rampant in production and sales. The high emission of the engine of the second country, shoddy, makes the emission regulations a dead letter.
However, ironically, for the sake of short-term economic benefits, even some of the world's major engine manufacturers that use advanced technology as their selling point are no exception. The large number of vehicles equipped with EGR engines violates the social responsibilities that have always been promised in the Chinese market.
As the "inventor" of the SARS route, China National Heavy Duty Truck Co., Ltd. did not obtain the imaginary economic benefits, but instead tasted the bitter fruit. In 2011, the number of vehicles sold by SINOTRUK declined by 27% year-on-year. The main reason is that, on the one hand, SARS models Poor quality and high emissions lead to poor user word-of-mouth; on the other hand, there is no advantage in cost compared to the large number of engines used in the country's second-genre EGR engine. The insiders have revealed that Sinopec's management is also constantly rethinking the introduction of the three-nation SARS EGR. With the advantages and disadvantages, the management also stated that during the implementation phase of the country’s fourth phase, CNHTC will no longer use similar SARS EGR technology, but will use electronically controlled engine technology with sustainable development potential to allow consumers to regain their weight. Steam brand confidence.
The National IV emission standard for commercial vehicles in July 2013 will soon be enforced. I also recommend that the managers of commercial vehicle companies, especially well-known domestic and international companies with advanced technological advantages, can proceed from public health policies and proceed from public health. From the long-term interests of the company, we should devote our energies and resources to R&D and production of truly low-emission, low-fuel-consuming engines, and strictly abide by the nationally formulated commercial vehicle emission policy.