Patent ID: 7874148
Filing Date: 2011-01-25
Classification: F01N,F02B,Y02T

Abstract:
1. An internal combustion engine system comprising: an internal combustion engine having an intake for air and an exhaust for products of combustion; a device for pressurizing intake air for delivery to said engine for combustion; an intercooler interposed between said pressurizing device and said engine intake for cooling air and, wherein said system for purging said fuel line receives air from one of a point downstream of said intercooler and from a point upstream of said intercooler, an exhaust aftertreatment device receiving the exhaust from said engine; a device for regenerating said exhaust aftertreatment device, said regenerating device having a fuel line and nozzle for injecting fuel upstream of said exhaust aftertreatment device on a periodic basis; a system for purging said fuel line and said nozzle with air from said intake air pressurizing device when said regenerating device is not injecting fuel, said system for purging said fuel line having an air reservoir receiving air from said pressurizing device and an outlet extending to said fuel line and nozzle and connected to said fuel line and nozzle when fuel is not being injected; and an orifice between said reservoir and said pressurizing device for limiting the flow of air from said pressurizing device.