The implementation of the four emission standards for diesel vehicles was originally postponed on January 1, 2011. It was postponed until January 1, 2012 and postponed until July 1, 2013. In this year's continuous haze weather, the industry generally believes that the national standard will be fully implemented as scheduled on July 1. However, as of press time, the National IV standard has not yet been implemented.
From country 3 to country 4, actually there are already feasible technical solutions. For larger commercial vehicle companies, it is not a problem to obtain engines and post-processing technologies that have been upgraded to the National IV emission standards, and it is not a problem for many companies to have their own subsidiaries that can produce four diesel engines. What are the reasons why the country has not fully implemented it? Gasgoo.com analysis shows that oil lag is a drag factor, and the increase in cost and protection of domestic commercial vehicle companies should be the more important reason. Although many of the local branded light commercial vehicles are approved by the Ministry of Environmental Protection, there are fewer models that are actually mass-produced. It is reported that Nanjing Iveco listed Iveco Baodi four diesel vehicles in 2009. The self-owned brands of light passenger vehicles did not start until 2011 when Jianghuai Xingrui and SAIC Datong’s National IV diesel vehicles were listed. Other independent brands of light passenger vehicles either did not have the National IV model, or only the National IV model had only the gasoline version.
According to analysis by industry experts, China's own-brand light commercial vehicle companies, especially light-guest passengers, are not capable of producing engines and must purchase engines from Cummins, Yuchai, and others. The National IV diesel engine not only uses high-price common rail technology (because the technology is basically in the hands of foreign companies such as Bosch), but also adds exhaust gas after-treatment systems. As a result, the cost of complete vehicles has greatly increased. This is a big challenge for self-owned brand light commercial vehicle companies that rely on price advantages. In addition to the increase in the cost of these systems, the use and maintenance costs of the National IV diesel vehicles will also increase. This may be more difficult for commercial vehicle users, especially light commercial vehicle users. According to expert analysis, the implementation of State IV will force local commercial vehicle companies to become high-end and the entire industry will be upgraded accordingly. However, local commercial vehicle parts suppliers failed to grasp the core technology of the National IV, and local commercial vehicle companies seem to be trying hard to push the industry upgrade.
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