Fuel characteristic e.g. diesel temperature, determining method for vehicle, involves detecting temporal characteristics of parameter characterizing pressure in rail, and locking characteristics characterizing fuel

摘要

The method involves detecting temporal characteristics of a parameter characterizing pressure in a rail (130). A frequency spectrum is determined by transformation from the temporal characteristics of the parameter into a frequency space. The transformation takes place in a frequency space via a Fourier transformation. Characteristics characterizing the fuel are locked from the temporal characteristics of the parameter. The characteristics characterizing the fuel are determined using a multi-layered artificial neural network and a rail pressure sensor. Independent claims are also included for the following: (1) a Computer program comprising instructions for performing a method for determining characteristics of fuel for a direct-injection internal-combustion engine (2) a computer program product comprising instructions for performing a method for determining characteristics of fuel for a direct-injection internal-combustion engine.