Verfahren zur Bestimmung der in einem Dieselabgasfilter anfallenden Partikelmenge

摘要

The invention describes a new algorithm for detecting the load of a diesel particulate filter (DPF) and alternatives to reduce the number of required sensors. The flow through the DPF is modeled with a valve equation or with another similar equation in which the effective area depends on the DPF load. The load, therefore, can be reconstructed by manipulating this equation. This method offers the advantage that the signal describing the state of the DPF is independent of the engine operating condition. The required sensors can be reduced to two by reconstructing the signals from existing signals and first principles.