Patent ID: 9644630
Date: 2017-05-09
CPC Classifications: F01C,F04C

Claim:
1. A supercharger for a vehicle, the supercharger comprising: a lower body housing a compressor; an upper lid configured to be coupled to the lower body thereby forming a plenum, the upper lid defining an air circulation port, the upper lid extending along a longitudinal length from a rear side to an opposed upstream front side and between opposed lateral sides, the air circulation port being disposed at the front side; and a contraction chamber integrally formed in the upper lid adjacent to the air circulation port, the contraction chamber including an attenuator plate defining a tuning neck, the tuning neck defining an inlet to and part of a volume of the contraction chamber; wherein the tuning neck includes a predetermined size and shape configured to attenuate a desired sound frequency generated by operation of the supercharger; wherein the attenuation plate is positioned perpendicular to a longitudinal axis of the upper lid that extends parallel to the longitudinal length, and the tuning neck includes a predetermined length in a direction of the longitudinal axis and an oval shape.