Patent ID: 8863496
Filing Date: 2014-10-21
Classification: F01N,Y02T

Abstract:
1. A particulate matter control system comprising: an electrode that is provided in an exhaust pipe of an internal combustion engine, the electrode configured to aggregate particulate matter when a voltage is applied; a power supply that is connected to the electrode and that applies the voltage; a particle number detecting unit that detects a particle number of particulate matter on a downstream side of the electrode; a calculation unit that calculates a reduction rate of the particle number at the time when the voltage is applied from the power supply to the electrode on the basis of a comparison of the particle number detected by the particle number detecting unit at the time when the voltage is applied from the power supply to the electrode with the particle number detected by the particle number detecting unit at the time when no voltage is applied from the power supply to the electrode; and a determination unit that determines that there is a failure when the reduction rate of the particle number, calculated by the calculation unit, is smaller than a threshold.