Patent ID: 7620188
Filing Date: 2009-11-17
Classification: G10K

Abstract:
1. An active vibratory noise control apparatus for reducing vibratory noise which is produced in the passenger compartment of a vehicle based on vibratory noise generated by a variable-cylinder internal combustion engine that can selectively be operated in a full-cylinder operation mode in which all of the cylinders are operated and a partial-cylinder operation mode in which some of the cylinders are out of operation, comprising: partial-cylinder operation mode determining means for determining whether the variable-cylinder internal combustion engine is in the partial-cylinder operation mode or not; and switching control means for de-energizing said active vibratory noise control apparatus when said partial-cylinder operation mode determining means applies a signal indicative of the full-cylinder operation mode, and for energizing said active vibratory noise control apparatus when said partial-cylinder operation mode determining means applies a signal indicative of the partial-cylinder operation mode.