| 摘要 |
In an internal-combustion engine (1), comprising at least one cylinder 2), at least one intake pipe (5) and at least one exhaust pipe (6) associated to the cylinder (2), at least one intake valve (3) and at least one exhaust valve (4), which control passage through said intake and exhaust pipes (5, 6), there are provided first sensor means (11) for detecting the temperature (T uv ) in said intake pipe, second sensor means (10) for detecting the pressure (p uv ) in said intake pipe, third sensor means for detecting the engine r.p.m. (rpm), and fourth means (12) for detecting or calculating the temperature (T exh ) in said exhaust pipe. An electronic control unit pre-arranced for receiving the signals at output from said first, second and third sensor means (10, 11) calculates the amount of fresh air taken in by the engine on the basis of a mathematical model that is of general applicability and that, in particular, is applicable irrespective of the technological implementation specifically used for a system (13) for variable valve actuation with which the engine can be provided. |
