1.前言当前,从环境保护的立场出发,对柴油机来说当务之急不仅要减少排气中的黑烟和未燃 HC,还需降低与它们相关的微粒排放量。可是关于它们的排放特性及其组成成分,如一般都认为排气微粒中含有苯并[a]芘等致癌性物质的可溶有机成分(SOF)等的研究,为数尚 1. Foreword At present, from an environmental protection standpoint, it is imperative for diesel engines not only to reduce black smoke and unburned HC in exhaust gas but also to reduce the particulate emissions associated with them. However, studies on their emission characteristics and their components, such as soluble organic components (SOF), which are generally considered to contain carcinogenic substances such as benzo [a] pyrene in the exhaust particulates,