Patent ID: 6901751
Filing Date: 2005-06-07
Classification: B01D,B60K,B60L,B60W,B60Y,F01N,F02B,F02D,F16H,Y02T,Y10S

Abstract:
1. System for controlling particulate filter temperature, the system comprising: an internal combustion engine producing exhaust gas at an exhaust gas outlet; a particulate filter having an filter inlet fluidly coupled to said exhaust outlet and a filter outlet; means for determining a temperature of said particulate filter; and a control circuit controlling rotational speed of said engine between an idle speed and a maximum speed, said control circuit increasing said idle speed from a first idle speed value to a second higher idle speed value if said temperature of said particulate filter exceeds a first temperature to thereby cool said particulate filter by increasing exhaust gas flow therethrough and decreasing said idle speed from said second idle speed value back to said first idle speed value if said temperature of said particulate filter drops below a second temperature less than said first temperature, said control circuit operable to log a fault code within a memory in communication with said control circuit if said temperature of said particulate filter exceeds a third temperature greater than said first temperature.