System for detecting failure of particle matter (PM) sensor mounted on diesel particulate filter (DPF) of vehicle, detects failure of PM sensor, when output signal which is different from predetermined normal output signal is output

摘要

The system (1) has a PM sensor (4) that is provided for detecting the particles delivered by the combustion engine. An electronic control unit (ECU) (5) is provided for determining whether the PM sensor is operated normally or not. The particles adhered on the filter is removed with respect to filter regeneration process. The predetermined normal output signal is output, when PM sensor is operated normally. The failure of PM sensor is detected, when output signal which is different from predetermined normal output signal is output in filter regeneration time interval.