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Due to the increasing price of crude oil, biofuel as an alternative of fossil fuels is sought to be a global-wide solution to reduce the emission of greenhouse gas. In order to compare the influence on engine which meet euro IV emission standard by using pure fossil diesel, 2% and 5% biodiesel. A long-term operation with blended 2% and 5% biodiesel by standard engine test had been evaluated in this study. The results could be referred to the consideration of marketing promotion strategy as well as government policy in Taiwan. Both B2-B5 diesel fuel (2 and 5 vol% biodiesel) and diesel fuel were employed to the same engines for testing purpose to compare the influence. The engines were equipped with an electronically controlled common-rail fuel injection system. After 500 hours full load durability operation, the key components of the engines were analyzed and characterized by a series of inspections to identify the degree of decay and wear behavior.

Recently, due to the concern on shortage in the supply of energy source as well as the greenhouse effect of engine exhaust, the use of renewable fuel, e.g., biodiesel, in the transportation sector is promoted. However, there are distinctions on both the physical and chemical properties between biodiesel and fossil diesel. These deviations in fuel property would result in different combustion characteristics and affect the performance of exhaust aftertreatment system, including the catalytic converter and the diesel particle filter. The purpose of this study is to investigate the effect of biodiesel on the performance and the durability of diesel particle filter. The biofuel adopted in this study was obtained by transesterification from methanol and spent edible oils, and fulfills the requirements specified in EN 14214 standard. All the tests were conducted in a heavy diesel engine (ISUZU 4JJ1E4N). Two studies were carried out in this paper.