With the rapidly developing of our country's economy, the demand of diesel fuel is increasing. But the fuel resource is limited. Because diesel fuel's incomplete combustion can pollute environment, it is getting more and more attention of people. The current problems of saving energy and reducing consumption needed to resolve, especially diesel particulate after combustion emissions are gasoline 30 to 70 times. The environmental pollution caused by automobile exhaust already quite serious, in this new clean diesel exploring alternative fuels is imperative, the research of this aspect has also been the world attention. A bench test of 490QB diesel engine was conducted with self-developed heavy aromatic fuel mixture of coal. Road test proves that using heavy aromatic fuel mixture of coal on diesel fuel can save fuel. The power performance of heavy aromatic fuel mixture of coal was equivalent, and fuel consumption decreased and smoke emissions reduced obviously compared with common diesel fuels.
This paper analyzed the basic physical and chemical characteristics of methanol diesel blended fuel. The power and fuel economy performances were studied experimentally when methanol diesel blended fuel was supplied to JiChai 3012 diesel engine, without any changing of the configuration of this machine. The results show that compared to common diesel engine, the diesel engine using 10% and 20% methanol blended fuel show a slightly decrease in power, a less than 5% decrease in the dynamic performance, and an increase in fuel consumption; while the smoke is the reduced by 10% and 20% methanol blended in diesel.
With the development of the automobile manufacture level in our country, it’s necessary to carry out the tests for whole vehicle or parts. At present, in China, only a few venues can provide the conditions for automotive testing, and all the test sites are at normal temperature. Therefore, the construction of low-temperature environment test site has become imminent. According to the survey, Heihe and Bei’an of Heilongjiang in China have established low-temperature test site spontaneously, but the test site are based on business requirements for each test, and there are no unified planning. So, how to build a rational, scientific, economic low-temperature test site, has become the focus of our research.
The study of this article focus on the standards on the working limit of the passenger car. The standards for passenger cars at low temperature were studied and proposed by combination of the technical content in cold regions’ environments and the development trend in the domestic and international situation. The proposed standards can improve the service life of mechanical parts, reduce wear and failure of passenger cars and improve the passenger's power, economy and security. In the industry standardization and the objective requirements of relevant standards, this proposed standards are the basis to ensure fair competition in international trade, maintain the normal order of market and make up a communication bridge among the international economic cooperations. Maintain maximum benifit of the China's auto industry in the internationality. The emphases of the standards is to establish standards for low temperature environment laboratory, draw our own standards on product characteristics and screening standards system in line with China's actual conditions.
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