Fuel pump and fuel feed system for an internal combustion...

Details Fuel pump and fuel feed system for an internal combustion... Fuel pump and fuel feed system for an internal combustion...

2005-09-28

2010-02-09

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S509000, C415S055100, C417S423100, C417S423300

Reexamination Certificate

active

07658180

ABSTRACT:
In a fuel pump in the form of a side-channel pump for a motor vehicle two partially annular ducts (21, 22) concentrically enclosing one another are connected to one another via a connecting duct (29). Connections (33, 34) of the connecting duct (29) to the partially annular ducts (21, 22) are laid so that at a rated speed of the fuel pump the same pressure prevails in each of them. If the speed falls below the rated speed, fuel passes from the radially outer, partially annular duct (22) into the radially inner, partially annular duct (21). A sufficient delivery capacity through the radially inner, partially annular duct (21) is thereby ensured.

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