| 摘要 |
A method of updating a pressure law (P-LAW) providing the exhaust pressure (P EXH ) as a function of the exhaust gas flow rate (Q EXH ); the following steps are included: measuring a first current intensity (Ip 1 ) of a UEGO sensor (13), under conditions of pure air and at a reference exhaust pressure (P EXH ); measuring a second current intensity (Ip 2 ) of the UEGO sensor (13) under conditions of pure air and at a different exhaust pressure (P EXH ); estimating the exhaust gas flow rate (Q EXH ) at the moment of measuring the second current intensity (Ip 2 ); determining a current difference (”Ip); determining an exhaust pressure (P EXH ) corresponding to the current difference (”Ip) by using a constructional feature (C-LAW) of the UEGO sensor (13); and using the exhaust gas flow rate (Q EXH ) corresponding to the current difference (”Ip) and the exhaust gas flow rate (Q EXH ) at the moment of measuring the second current intensity (Ip 2 ) in order to update the pressure law (P-LAW). |
