Patent ID: 7635048

Claim:
An engine system comprising: at least one sound producing device disposed in an engine compartment defined by a housing: at least one engine system component disposed in the engine compartment and including an acoustic reflective surface, the at least one engine system component comprising an exhaust process element, said exhaust process element comprising an exhaust aftertreatment device, said exhaust aftertreatment device comprising at least one of a particulate filter and a NOx reduction device; a support beam coupled with the at least one of a particulate filter and a NOx reduction device; a jacket surrounding said at least one engine system component and configured to absorb sound from said at least one sound producing device, said jacket including a sound absorbing material and an acoustic permeable covering between said acoustic reflective surface and said engine compartment. the acoustic permeable covering comprising a micro-perforated skin; and said sound absorbing material comprising a thermally insulating material disposed between said acoustic reflective surface and said micro-perforated skin.