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US 10,851,752 B2Granted
Piston fuel pump and check valve therefore
AssigneeRobert Bosch GmbH
InventorsMichael Kleindl, Tamim Latif, Peter Ropertz, Matthias Maess
Life of this patent
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Abstract
A piston fuel pump for an internal combustion engine includes a pump housing, a piston, and a non-return discharge valve. The non-return discharge valve has a valve element and a guide element configured to guide the movement of the valve element. The guide element is at least indirectly pressed in a radial manner into an opening in the pump housing.
Claims10
A piston-type fuel pump for an internal combustion engine, comprising:
- a pump housing that includes a cylindrical opening along a longitudinal axis and defining a radial direction transverse to the longitudinal axis;
- a piston;
- and
- a non-return outlet valve disposed within said opening that includes:
- a valve element;
- and
- a guide element that is configured to guide movement of the valve element along said longitudinal axis of said opening, wherein the guide element defines a longitudinal axis that is coaxial with said longitudinal axis of said opening and includes;
- a guide section configured to guide the valve element, the guide section disposed outside the entire valve element in said radial direction;
- a retention section separate from the guide section that is at least indirectly pressed in said radial direction into the opening of the pump housing;
- and
- a holding ring that includes fuel passage openings, and that is pressed into the pump housing, wherein the guide element is pressed into the holding ring.
8 more elements
A piston-type fuel pump for an internal combustion engine, comprising;
- a pump housing that includes an opening;
- a piston;
- and
- a non-return outlet valve that includes:
- a valve element having a stem;
- a guide element that is configured to guide movement of the valve element, and that is at least indirectly pressed radially into the opening of the pump housing, the guide element including a guide section with said stem extending through said guide section;
- and
- a valve spring, bearing against said stem of said valve element, that is fastened to the guide element and that is a spiral-type flat diaphragm spring or a stellate flat diaphragm spring.
5 more elements
Dependencies are inferred from the claim text.