Patent ID: 9410493
Filing Date: 2016-08-09
CPC Classification: F01N,F02D,G01N,Y02T

Claim Text:
1. A control device for an internal-combustion engine, the control device comprising: a particulate matter sensor installed in an exhaust passage of the internal-combustion engine; a particulate capturing filter configured to capture particulate matter contained in an exhaust gas and disposed in the exhaust passage at place upstream of the particulate matter sensor; an electronic control unit configured to detect a particulate amount in the exhaust gas through the exhaust passage in response to an output from the particulate matter sensor; the electronic control unit configured to apply a particulate capturing voltage between electrodes of the particulate matter sensor during a first period so as to form a particulate layer on surfaces of the electrodes of the particulate matter sensor; and the electronic control unit configured to stop applying the particulate capturing voltage during a second period to maintain the particulate layer; the electronic control unit configured to execute a malfunction detection control to determine whether a malfunction of the particulate capturing filter exists or not, wherein the first period is a period between the completion of the malfunction detection control and a time when the output of the particulate matter sensor reaches a reference output, and the second period is a period between the time when the output of the particulate matter sensor reaches the reference output.