Patent ID: 7340886
Filing Date: 2008-03-11
Classification: F01N,F02B,F02D,Y02T

Abstract:
1. An engine system comprising: a diesel engine; an exhaust passage connected to the engine; a DPM filter provided on the exhaust passage, which traps diesel particulate matter (DPM) contained in an exhaust gas such that the DPM accumulates therein; 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: start regeneration processing of the DPM filter by controlling the temperature adjusting device to raise an exhaust gas temperature when a regeneration timing of the DPM filter is reached; set a target exhaust gas temperature in an engine running condition other than an idling condition during regeneration processing to ensure that a temperature of the DPM filter does not exceed an upper temperature limit of the DPM filter, even when the temperature of the DPM filter is raised due to the engine entering the idling condition during the regeneration processing; and control the temperature adjusting device to control the exhaust gas temperature to the target exhaust gas temperature, wherein the controller further functions to: