Abstract
It is known that Diesel Particulate Filters (DPF) are able to largely reduce the emission of Particulate Matter (PM) from the exhaust gas of diesel engines. When operating conditions continue, however, over long times where the exhaust temperature does not exceed a certain level, PM accumulates in the DPF causing blockage. Devices are needed to rise the exhaust temperatures such that the PM is burnt. In this study, we paid attention to the burner which constitutes the temperature-raising device. One important specification for such a device is that it works without failure even for conditions where exhaust velocity or residual oxygen concentration vary in adverse directions. Various experiments regarding the combustion chamber shape have been performed. As a result, we succeeded in the development of a "Simple Structure" and "Low Cost" burner, which reduces the needed auxiliary combustion air to the burner as much as possible. After characterizing the operating conditions in terms of engine speed, temperature raise and oxygen concentration, the structure of the new burner is presented and the performance demonstrated by temperature histories.
Published Version
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