Patents by Inventor Ralf HOELSCH

Ralf HOELSCH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System for influencing exhaust noise in a multi-flow exhaust system
    Patent number: 9706295
    Abstract: An anti-noise system for influencing exhaust noises propagating through a multi-flow exhaust system includes a controller 80 and at least one actuator. The at least one actuator is disposed in a sound generator 20; 21; 23; 25; 27, connected to the controller 80 for receiving control signals, and adapted to generate sound inside the sound generator 20; 21; 23; 25; 27. The sound generator 20; 21; 23; 25; 27 is connectable to at least two exhaust tracts 60, 61 of the multi-flow exhaust system of the vehicle simultaneously. The controller 80 is configured to generate a control signal that prompts the at least one actuator disposed in the sound generator 20; 21; 23; 25; 27 to cancel sound inside the at least two exhaust tracts 60, 61 of the vehicle's multi-flow exhaust system at least in part and preferably completely.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: July 11, 2017
    Assignee: Eberspächer Exhaust Technology GmbH & Co. KG
    Inventors: Michael Pommerer, Juergen Kobe, Ralf Hoelsch, Peter Wink
  • SYSTEM FOR INFLUENCING EXHAUST NOISE IN A MULTI-FLOW EXHAUST SYSTEM
    Publication number: 20140376733
    Abstract: An anti-noise system for influencing exhaust noises propagating through a multi-flow exhaust system includes a controller 80 and at least one actuator. The at least one actuator is disposed in a sound generator 20; 21; 23; 25; 27, connected to the controller 80 for receiving control signals, and adapted to generate sound inside the sound generator 20; 21; 23; 25; 27. The sound generator 20; 21; 23; 25; 27 is connectable to at least two exhaust tracts 60, 61 of the multi-flow exhaust system of the vehicle simultaneously. The controller 80 is configured to generate a control signal that prompts the at least one actuator disposed in the sound generator 20; 21; 23; 25; 27 to cancel sound inside the at least two exhaust tracts 60, 61 of the vehicle's multi-flow exhaust system at least in part and preferably completely.
    Type: Application
    Filed: June 24, 2014
    Publication date: December 25, 2014
    Inventors: Michael POMMERER, Juergen KOBE, Ralf HOELSCH, Peter WINK