Method for assisting with heating a catalytic converter of an internal combustion engine
AssigneeFord Global Technologies, LLC
InventorsBrian Eves, Dirk Borrmann, Gary Peirce, Franz Brinkmann
Life of this patent
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Abstract
The invention relates to a method for heating a catalytic converter which is arranged in the exhaust-gas path of an internal combustion engine with direct injection and spark ignition. In the method, a first fuel injection takes place in the intake stroke (E), whereas a second fuel injection begins in the combustion stroke after top dead center and prior to the spark ignition of the air/fuel mix. It is preferable for the second fuel injection to continue beyond the ignition instant until the pressure in the combustion chamber reaches the fuel injection pressure.
Claims13
A method for heating a catalytic converter which is arranged in the exhaust-gas path of an internal combustion engine with direct injection and spark ignition, comprising:
- a first fuel injection taking place before top dead center;
- and
- a second fuel injection taking place in the combustion stroke after top dead center, wherein the second fuel injection begins prior to ignition of the fuel.
A system for controlling a temperature of a catalytic converter arranged in the exhaust-gas path of a direct injection spark ignition internal combustion engine, the engine having at least one cylinder with a piston, comprising:
- the engine;
- the catalytic converter;
- and
- a controller injecting a first fuel amount into the cylinder before the piston is at top dead center, said controller subsequently injecting a second fuel amount, said injection taking place in the combustion stroke after the piston is at top dead center, wherein said second fuel injection begins prior to ignition of the fuel.
Dependencies are inferred from the claim text.