| 主权项 |
1. A method, comprising:
providing a fundamental frequency corresponding to the RPM of an engine of a vehicle; determining a plurality of harmonics of the fundamental frequency; determining a target shape of the plurality of harmonics, the target shape comprising, for each of the harmonics of the plurality of the harmonics, a gain value as a function of the RPM of the engine; determining an engine harmonic enhancement gain curve comprising gain values as a function of engine load; and combining the plurality of harmonics, the target shape of the plurality of harmonics, and the engine harmonic enhancement gain curve to produce a set of harmonic enhancement signals; wherein determining the engine harmonic enhancement gain curve comprises, for at least one of the plurality of harmonics, determining a set of gain values as a function of engine load that is different from a set of gain values as a function of engine load corresponding to the other harmonics, wherein determining of an engine harmonic enhancement gain curve for at least one of the plurality of harmonics comprises: determining the value of a parameter other than the engine load related to an operating condition of a vehicle; and responsive to the value of the parameter and the engine load, determining the engine harmonic enhancement gain curve, and wherein the parameter is a transmission ratio of a continuously variable transmission. |
