Engelhard有限公司已经研制出一种柴油机黑烟自动净化滤清器,一般它能够消除90％以上肉眼可见的烟尘或黑烟。该公司声称,这种型号为DPX的烟尘过滤器,能以催化燃烧被扑集的烟尘粒子,而保持其本身清洁地运行可达数百小时,几乎不需要维修。DPX过滤器是把一个无逆流陶瓷滤芯安装在可翻新改造的不锈钢过滤器箱体里。见图示。对DPX装置的现场试验表明,当柴油 Engelhard GmbH has developed a self-cleaning black smoke filter for diesel engines, which generally eliminates more than 90% of smoke or smoke that is visible to the naked eye. The company claims the DPX soot filter, which catalytically burns soot particles, keeps itself clean for as long as hundreds of hours with virtually no maintenance. DPX filter is a non-counterflow ceramic filter installed in a refurbished stainless steel filter box. See illustration. Field tests on the DPX unit showed that when diesel was used