Patent ID: 7866442
Filing Date: 2011-01-11
Classification: F01N,Y02A

Abstract:
1. A muffler comprising a front chamber upstream from a chamber partition, an expansion chamber downstream from the chamber partition, and a conduit passing through the expansion chamber, wherein the conduit comprises: a conduit partition; an upstream section upstream from the conduit partition comprising an outflow section defining a plurality of outflow holes that allows exhaust gas to flow out into the expansion chamber, and a head section upstream from the outflow section having an open upstream end that passes through the chamber partition and protrudes into the front chamber from the chamber partition; and an inflow section downstream from the conduit partition and defining a plurality of inflow holes that allows exhaust gas to flow in from the expansion chamber, wherein a sum of the open areas of the plurality of inflow holes is smaller than an inner cross sectional area of a downstream side section of the conduit downstream from the inflow section.