Method and device for determining a starting time of a regeneration process for regenerating a diesel particle filter
AssigneeMann+Hummel GmbH
InventorsUlrich Lampen, Andreas Kloss, Volker Hensel, Uwe Brenneis, Alexander Kuehn, Stéphane Nataf
Life of this patent
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Abstract
Method for determining a starting time of a regeneration process of a particle filter which is connected into the exhaust train of an internal combustion engine, in particular of a diesel engine, wherein the data of an air mass flow rate meter, of an exhaust gas temperature sensor and of a differential pressure sensor are fed to a control unit and the control unit starts the regeneration on the basis of the data by means of the comparison with characteristic diagrams.
Claims15
A method for determining a starting time of a regeneration process of a particle filter which is connected into the exhaust train of an internal combustion engine, comprising:
- providing characteristic diagrams of exhaust gas temperature, mass air flow and differential pressure;
- providing an air mass flow rate meter measuring air mass flow to the internal combustion engine and providing measured air mass flow rate data to a control unit;
- providing an exhaust gas temperature sensor measuring temperature of exhaust gas from the internal combustion engine and providing measured exhaust gas temperature data to a control unit;
- providing a differential pressure sensor measuring pressure difference between and inlet and outlet of the particle filter and providing measured differential pressure data to a control unit;
- providing characteristic diagrams of exhaust gas temperature, mass air flow and differential pressure at one or more particle filter soot load state conditions;
- determining the starting time for regeneration by comparing measured data to the characteristic diagrams
A device for determining a starting time of a regeneration process of a particle filter which is connected into the exhaust train of an internal combustion engine, comprising:
- a. an air mass flow rate meter, which is arranged in terms of flow in the intake air stream before the particle filter, between the intake air filter and the turbocharger,
- b. an exhaust gas temperature sensor arranged before the particle filter,
- c. a differential pressure sensor, which determines the pressure difference before and after the particle filter,
- d. a control unit, which to determine the start of regeneration only requires data connections for the data relating to air mass flow, exhaust gas temperature and differential pressure.
Dependencies are inferred from the claim text.