| 摘要 |
<p>A method for controlling the titre of the exhaust gases in an internal combustion engine (2), in a control system (1) comprising a control unit (3) and oxygen sensor means (4), disposed along an exhaust duct (5) of the engine (2) and supplying a signal (V lambda ) indicative of a titre ( lambda ) of the exhaust gases; the control unit comprising a table (8), a controller (9) and a correction and actuation block (10), the table (8) receiving as input a plurality of engine-related parameters (L, RPM) and an objective titre value ( lambda DEG ) and supplying as output a plurality of operating parameters (TR, TL, A); the controller (9) receiving as input the operating parameters (TR, TL, A) and the signal (V lambda ) and supplying as output a correction parameter (KO2). The method comprises the stages of: selecting respective values of the operating parameters (TR, TL, A) on the basis of the objective titre value ( lambda DEG ) and the engine-related parameters (L, RPM), calculating the correction parameter (KO2) on the basis of the respective values of the operating parameters (TR, TL, A) and the signal (V lambda ) and calculating an adjusted quantity of fuel (QFR) on the basis of the correction parameter (KO2) and a nominal quantity of fuel (QFN). The method further comprises the stages of: selecting (100) respective values of a first and a second of the operating parameters (TR, TL), determining magnitudes (TIL, TIR) as a function of the respective values of the first and the second operating parameters (TR, TL) and determining a third of the operating parameters (A) as a function of the first and the second operating parameters (TR, TL) and a mean value of the correction parameter (KO2). <IMAGE></p> |
