INJECTION METHOD AND DEVICE FOR INJECTING A REDUCING SUBSTANCE INTO AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
May 8, 2009
filing date -
May 9, 2008
priority date (Note) -
Abandoned
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Abstract
An injection method and device for injecting a reducing liquid additive into an exhaust system of an internal combustion engine; the injection device in provided with: a tank containing the reducing liquid additive; a reversible pump connected to the tank; an injector which is connected to the pump by means of a feeding pipe and is adapted to inject the reducing additive into the exhaust pipe; and a vent valve which is arranged along the feeding pipe upstream of the injector to put the feeding pipe into communication with the atmosphere.
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