Reducing agent pump for an exhaust-gas aftertreatment system of an internal combustion engine
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United States of America Patent
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Jan 8, 2008
Grant Date -
Sep 16, 2004
app pub date -
Mar 23, 2004
filing date -
Sep 25, 2001
priority date (Note) -
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Abstract
A reducing agent pump has a pump inlet part and a pump outlet part closing off the pump body at its ends. One or both of the inlet and outlet parts is of two-part construction, with a closure element and another element. The two elements are prestressed relative to one another with a spring element, so that in the event of a pressure which exceeds the spring force of the spring element, a relative movement can be carried out between the two elements of the two-part member. This makes it possible to absorb an increase in the volume of the reducing agent inside the pump body caused by freezing and therefore to prevent damage to the reducing agent pump.
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