Particulate filter regeneration system for an internal combustion engine
AssigneeDeere & Company
InventorRichard Edward Winsor
Life of this patent
Estimating the term…
Abstract
A particulate filter regeneration system for an internal combustion engine includes a plurality of combustion cylinders, an intake manifold and an exhaust manifold. The particulate filter regeneration system includes a particulate filter adapted for communication with the exhaust manifold, a flame heater adapted for communication with the intake manifold, and a temperature indicator for providing an indication of a temperature associated with the exhaust manifold. A controller is coupled with the temperature indicator and the flame heater. The controller actuates the flame heater dependent upon a particulate filter regeneration indicator and a signal from the temperature indicator indicating a temperature of less than approximately 300° C.
Claims17
An internal combustion engine, comprising:
- a plurality of combustion cylinders;
- an intake manifold in communication with at least one of said plurality of combustion cylinders;
- an exhaust manifold in communication with at least one of said plurality of combustion cylinders;
- a particulate filter in communication with said exhaust manifold;
- a diesel oxidation catalyst (DOC) positioned between said exhaust manifold and said particulate filter:
- a flame heater in communication with said intake manifold;
- at least one temperature indicator in communication with an inlet side of said DOC;
- a controller coupled with each said temperature indicator and said flame heater, said controller actuating said flame heater dependent upon a particulate filter regeneration indicator and a signal from at least one of said temperature indicator;
- and
- a turbocharger with a turbine in communication with said exhaust manifold, and wherein another said temperature indictor is in communication with an inlet side of said turbine.
A method of regenerating a particulate filter in an internal combustion engine, comprising the steps of:
- providing a particulate filter regeneration indicator;
- determining that an exhaust temperature is below a predetermined threshold value;
- actuating a flame heater to heat intake air associated with an intake manifold, dependent upon each of said particulate filter regeneration indicator and said determined exhaust temperature below said predetermined threshold value;
- and
- determining an exhaust temperature at an inlet of a turbocharger turbine;
- and deactuating a fuel flow to said flame heater if said determined exhaust temperature at said inlet of said turbocharger turbine is greater than approximately 700° C.
Dependencies are inferred from the claim text.