Patent ID: 7941995

Claim:
An exhaust aftertreatment system treating engine exhaust, comprising a first exhaust tube carrying said exhaust therethrough and having an injector injecting chemical species into said first exhaust tube and mixing with said exhaust, a second exhaust tube carrying said exhaust therethrough from said first exhaust tube for flow to a downstream aftertreatment element catalytically treating said exhaust, flexible tubing compliantly connecting said first and second exhaust tubes, and a liner extending along and protecting said flexible tubing from said chemical species, wherein: said first exhaust tube comprises an upstream section, and a downstream section downstream of said injector; said second exhaust tube comprises an upstream section, and a downstream section; said upstream section of said second exhaust tube comprises said flexible tubing; said downstream section of said first exhaust tube comprises said liner; said flexible tubing and said liner overlap in telescoping relation and define an annular space therebetween, and comprising a baffle between said flexible tubing and said liner and deterring entry of said chemical species into said annular space.