METHOD OF DIAGNOSING FAILURES IN INLET MANIFOLD PRESSURE SENSORS

摘要

A method of determining the pressure Pp at a point from the compressor outlet to the intake manifold of a turbocharged engine system comprising: providing a relationship between the turbo speed(ώ),compressor pressure ratio (P1/P0) and air mass flow (AMF); measuring the turbo speed(ώ); measuring or estimating the compressor inlet pressure, P0; measuring the air mass flow (AMF); determining the pressure Pp from the parameters of steps b) c) and d) using said relationship.