| 主权项 |
1. A method of controlling an internal combustion engine (1) supercharged by a turbosupercharger (12) comprising a turbine (13) and a compressor (14); the control method comprising the steps of:
determining, in a reduced mass flow/compression ratio graph, at least one limit operation curve (28, 30, 32, 34) of the compressor (14) representing a limit of the operating range of the compressor (14); and controlling the turbosupercharger (12) to keep the actual reduced mass flow (QAHR) and actual compression ratio (CR) of the compressor (14) within the limit defined by the limit operation curve (28, 30, 32, 34) of the compressor (14); determining an index (Δdyn) varying as a function of the dynamics of the reduced mass flow (QAHR) of the compressor (14); and modifying the limit operation curve (28, 30, 32, 34) of the compressor (14) as a function of the index (Δdyn) wherein a first limit operation curve (28, 30, 32, 34) of the compressor (14) is shifted, in the reduced mass flow/compression ratio graph, by an amount which is a function of the index (Δdyn) and wherein the first limit operation curve (28) of the compressor (14) is a pump curve (28) of the compressor (14), which defines the points beyond which the internal aerodynamic balance of the compressor (14) is disrupted; and the first limit operation curve (28) of the compressor (14) is shifted up, in the reduced mass flow/compression ratio graph, when the internal combustion engine (1) accelerates, and down when the internal combustion engine (1) decelerates. |
