Metering system for reducing pollutants in motor vehicle...

Details Metering system for reducing pollutants in motor vehicle... Metering system for reducing pollutants in motor vehicle...

2005-09-09

2009-08-11

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S295000, C060S297000, C060S303000, C239S089000, C239S091000, C239S092000, C239S132300, C239S411000, C239S416400, C239S585500, C222S145500, C222S145600

Reexamination Certificate

active

07571603

ABSTRACT:
The invention relates to a metering system for injecting pollutant reducing medium into an exhaust system includes a metering pump, and at least one self-opening nozzle for injecting fluidic media into the exhaust gas system. The nozzle is self-opening with a needle chamber, a nozzle needle and a spring chamber with a spring element. The needle chamber and spring chamber are separated by a flexible membrane which prevents fluidic media from escaping from the needle chamber into the spring chamber, and also permits an excess pressure to prevail in the needle chamber in relation to the spring chamber, causing the nozzle needle to be displaced in opposition to a spring force, thus releasing a nozzle opening. The inventive metering system is cost-effective, robust and can also be used at low operating temperatures.

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patent: 7100366 (2006-09-01), Hager et al.
patent: 2003/0033799 (2003-02-01), Scheying
patent: 29 00 847 (1980-07-01), None
patent: 101 39 142 (2003-02-01), None

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