Fuel rail pulse damper with improved end crimp

Details Fuel rail pulse damper with improved end crimp Fuel rail pulse damper with improved end crimp

2007-01-23

2007-01-23

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S456000, C138S030000, C029S890060

Reexamination Certificate

active

10855709

ABSTRACT:
An internal pulse damper for use in a fuel rail for an internal combustion engine. The damper is formed from a length of tubular metal stock having a flat oval cross-section and ends flattened by crimping to form a captive-air pillow. The end crimps are improved through use of tooling to eliminate a creased sidewall area vulnerable to stress failure in prior art pulse dampers. Such tooling includes constraints to prevent the tubing sides from flaring out and forming a longitudinal crease adjacent the end crimp during squeezing-shut of the tube end.

REFERENCES:
patent: 3680189 (1972-08-01), Noren
patent: 5216809 (1993-06-01), Abbott et al.
patent: 5617827 (1997-04-01), Eshleman et al.
patent: 6463911 (2002-10-01), Treusch et al.
patent: 6568370 (2003-05-01), Treusch et al.
patent: 6708670 (2004-03-01), Treusch et al.
patent: 6871635 (2005-03-01), Curran et al.

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