×

Cylinder responsive vibratory noise control apparatus

  • US 7,620,188 B2
  • Filed: 06/15/2004
  • Issued: 11/17/2009
  • Est. Priority Date: 06/17/2003
  • Status: Expired due to Fees
First Claim
Patent Images

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.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×