| 摘要 |
<p>PURPOSE:To improve the accuracy to estimate the amount of particulates to be collected by estimating the amount of particulates to be collected based on the corrected pressure loss by correcting the pressure loss of the filter by means of the engine speed and the intake air pressure loss. CONSTITUTION:An upstream pressure sensor 7 to detect the exhaust pressure, a temperature sensor 6, a heater 11, a filter 2 and a downstream pressure sensor 17 to detect the downstream pressure of the filter are arranged. A controller 8 is provided, the corrected pressure loss where the pressure loss of the filter 2 is corrected by the engine speed and the intake air pressure loss is obtained, and the particulate collection amount of the filter 2 is presumed based on this corrected pressure loss. When the downstream pressure of the filter 2 is deemed to be approximately constant, or close to the atmospheric pressure, the pressure loss of the filter 2 can be replaced with the upstream pressure of the filter. This constitution allows the accurate particulate collection amount to be estimated.</p> |
