Patents Assigned to MANN+HUMMEL FILTER (SHANGHAI) CO. LTD.
  • Variable frequency Helmholtz resonator
    Patent number: 8839904
    Abstract: A variable frequency Helmholtz resonant cavity includes a Helmholtz resonant cavity body, two Helmholtz resonant cavity pipes with different cross-sectional areas and lengths and a control valve plate. The Helmholtz resonant cavity body is connected with the main pipe of the intake system via the Helmholtz resonant cavity pipes, and the control valve plate is disposed at the location where the two Helmholtz resonant cavity pipes meet.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: September 23, 2014
    Assignee: Mann+Hummel Filter (Shanghai) Co. Ltd.
    Inventor: Qiang Chen
  • Variable Frequency Helmholtz Resonator
    Publication number: 20140060961
    Abstract: A variable frequency Helmholtz resonant cavity includes a Helmholtz resonant cavity body, two Helmholtz resonant cavity pipes with different cross-sectional areas and lengths and a control valve plate. The Helmholtz resonant cavity body is connected with the main pipe of the intake system via the Helmholtz resonant cavity pipes, and the control valve plate is disposed at the location where the two Helmholtz resonant cavity pipes meet.
    Type: Application
    Filed: August 22, 2013
    Publication date: March 6, 2014
    Applicant: MANN+HUMMEL FILTER (SHANGHAI) CO. LTD.
    Inventor: Quiang Chen