Method for heating a catalytic converter
AssigneeVolkswagen Aktiengesellschaft
InventorsChristopher Gessenhardt, Karsten Michels
Life of this patent
Estimating the term…
Abstract
A method of heating a catalytic converter of an internal combustion engine, wherein the method comprises the steps of: igniting the gas charge in one of the cylinders in a range from 10° CA before ignition top dead center to 20° CA after ignition top dead center; and opening the exhaust valve of the cylinder exhaust of the cylinder in a range from 30° CA to 55° CA after ignition top dead center. The method allows the catalytic converter of the internal combustion engine to quickly reach operating temperature and thus contributes to the reduction of pollutant emissions. An internal combustion engine is also provided that is designed to carry out the method of the invention for heating a catalytic converter.
Claims10
A method for heating a catalytic converter of an internal combustion engine with at least one engine block having a plurality of cylinders and an exhaust tract having a plurality of cylinder exhausts, each of the plurality of cylinder exhausts being adapted to be opened and closed by an exhaust valve, the method comprising:
- igniting a gas charge in at least one of the cylinders in a range from 10° CA before ignition top dead center to 20° CA after ignition top dead center;
- and
- exhaust opening the exhaust valve of the cylinder exhaust of the cylinder in a range from 30° CA to 55° CA after ignition top dead center.
Dependencies are inferred from the claim text.