Patent ID: 8059829
Filing Date: 2011-11-15
Classification: B60W

Abstract:
1. A sound effect producing apparatus for a vehicle comprising: a waveform data table for storing waveform data in one cyclic period; a frequency detector for detecting an engine rotational frequency; a reference signal generator for generating a harmonic reference signal based on said engine rotational frequency by successively reading said waveform data from said waveform data table; a processor for generating a control signal based on said reference signal; a clutch signal generator for generating a clutch signal indicating an engagement state of a clutch and outputting said clutch signal to said processor; and an output means for converting said control signal into a sound effect and outputting said sound effect, wherein said processor changes a gain of said control signal, depending on a change of said engine rotational frequency per unit of time, such that said gain during declutching is lower than said gain during clutching.