All new diesel models from Volvo are also fitted with a maintenance-free particle filter that traps about 95 percent of all soot particles.
所有的沃尔沃的新柴油发动机还配备了免维护的微粒过滤器,过滤器大约百分之九十五的烟尘颗粒。
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Two key parameters are the size of the smallest particle the filter traps (the best are 0.3 micron) and the efficiency of gases the filter removes, rated at 95, 99 or 99.97 percent.