Exhaust throttle valve system and method for diesel particulate filter regeneration

10) A method of regenerating an exhaust aftertreatment system of an engine having a diesel particulate filter, the method comprising:

• providing a fluid passageway from the engine to an ambient;
• providing an exhaust throttle valve downstream of the engine on the fluid passageway;
• actuating the exhaust throttle valve to at least partially obstruct the flow of exhaust gas through the fluid passageway;
• compressing and heating the exhaust gas upstream of the exhaust throttle valve on the fluid passageway;
• and
• delivering the heated exhaust gas to the diesel particulate filter to initiate regeneration.

16) An exhaust gas aftertreatment system for a vehicle having an engine, the aftertreatment system comprising:

• an engine control module associated with the engine;
• a fluid passageway extending from the engine to an ambient for fluidly communicating exhaust gas;
• a diesel particulate filter disposed on the fluid passageway downstream of the engine;
• at least one exhaust throttle valve located downstream of the diesel particulate filter on the fluid passageway;
• an actuator for actuating the at least one exhaust throttle valve;
• and
• at least one of a temperature sensor for sensing the temperature at the aftertreatment system and a back pressure sensor for sensing the pressure at the aftertreatment system, wherein at least one of the temperature sensor and the back pressure sensor communicate at least one of the temperature and the back pressure to an engine control module on the engine.