| 摘要 |
<p>A measurement method capable of accurately evaluating the trapped amount of particulate matter (PM) accumulated in a diesel particulate filter (DPF) is provided. The method for measuring the amount of accumulated particulate matter comprises propagating ultrasonic waves generated by a transmitter 3 provided directly to the DPF or outside a container and insulation material 6 having a property that propagates ultrasonic waves, measuring the amount of PM accumulated in the DPF 2 using a receiver 4, the DPF being composed of porous ceramic and disposed at an intermediate point in the exhaust pipe 1 of a diesel engine, and determining the amount of accumulated PM on the basis of the results.</p> |
