Title:
PLUNGER FOR AN INTERNAL COMBUSTION ENGINE FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2013/178334
Kind Code:
A3
Abstract:
A plunger (115) of a fuel pump (10) may have an essentially cylindrical base shape for axial movement and rotation within a pump barrel (110) of the fuel pump (10). The plunger (115) may comprise, at a fuel amount controlling end of the plunger (115), an outer surface that comprises a recessed surface region (139), a sealing surface section (165), and a control interface (170, 170A, 170B) connecting in radial direction the recessed surface region (139) with the sealing surface section (165). At the radial inner section of the control interface (170, 170A, 170B), the transition from the recessed surface region (139) to the control interface (170, 170A, 170B) may be curved with a curvature radius that has a radius equal or larger than 1mm to thereby reduce or avoid cavitation effects, for example, when used with high water content alternative fuels.
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Inventors:
VON DER OSTEN-SACK ANDREAS (DE)
OHRT OLE (DE)
OHRT OLE (DE)
Application Number:
PCT/EP2013/001500
Publication Date:
January 23, 2014
Filing Date:
May 21, 2013
Export Citation:
Assignee:
CATERPILLAR MOTOREN GMBH & CO (DE)
International Classes:
F02M59/26
Foreign References:
| FR1567479A | 1969-05-16 | |||
| JPS5730375U | 1982-02-17 | |||
| DE763005C | 1954-03-29 | |||
| DE3902764A1 | 1990-08-02 |
Attorney, Agent or Firm:
KRAMER - BARSKE - SCHMIDTCHEN (Munich, DE)
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