ディーゼル排気微粒子とラップに関する研究

概要

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Particulate trap is one of the particulate emission control devices. The trapping performance has hysteresis against the engine load because soluble organic fractions (SOP) discharge again as the trap temperature rises. Mode test is, therefore, necessary as well as steady load test.<BR>In this paper, 13 mode test and full load test after long idling are carried out using a single cylinder direct injection diesel engine to evaluate trap perf ormace.<BR>Results show that the 13 mode particulate reduction is lower than that obtained from steady test due to SOP re-discharge. SOP reduces only 16% while dry soot decreases ca. 65% by trap through 13 mode.<BR>After long idling, particulate concentration increases ca.3 times greater with trap than without trap and decreases gradually, because SOP accumulated in the idling period discharges again when the trap temperature rises as engine load increase. The recovery time is comparable to the idling time.
社団法人日本マリンエンジニアリング学会の論文