Patent ID: 7171802
Filing Date: 2007-02-06
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. An engine system comprising: a diesel engine; an exhaust passage connected to the engine; a diesel particulate matter (DPM) filter provided on the exhaust passage, which traps DPM contained in an exhaust gas of the engine; a temperature adjusting device coupled to the engine, the temperature adjusting device adjusting an exhaust gas temperature of the engine; and a controller coupled to the temperature adjusting device, the controller functioning to: wherein the first and second trapped DPM amount calculation processes are processes to calculate the trapped DPM amount by referring to a first trapped DPM amount map and a second trapped DPM amount map respectively, and in the first and second trapped DPM amount maps, the trapped DPM amount and the filter differential pressure are defined in a substantially linear relationship and when the filter differential pressure is equal, a value obtained by referring to the second trapped DPM amount map is greater than a value obtained by referring to the first trapped DPM amount map.