| 摘要 |
PURPOSE: A resonator unit for vehicles is provided to effectively reduce noise by changing the volume of a body unit according to engine RPM. CONSTITUTION: A resonator unit for vehicles comprises an inlet port(110), a body unit(120), a volume control unit(130), and a controller(140). The inlet port is connected to a duct. The body unit is extended from the inlet port, and comprises a space inside. The volume control unit controls the volume of the body unit with being formed in the body unit. The volume control unit comprises a volume control film and a form changing unit. The form changing unit changes a form of the volume control film. The controller controls the volume control unit so that the volume control unit controls the volume of the body unit based on engine RPM.
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