Limiting combustion engine exhaust gas turbocharger revolution rate involves estimating actual charger revolution rate, comparing with threshold, limiting/reduce rate if threshold exceeded

摘要

The method involves determining the air mass flow in the induction tract, the pressure upstream and downstream of a compressor in the tract and the temperature of the induction air upstream of the compressor, combining them in a computer unit using a stored script to estimate the actual charger revolution rate, comparing with a revolution rate threshold and initiating measures to limit or reduce the revolution rate if the threshold is exceeded.