US 10,352,284 B2Granted

Piston fuel pump

AssigneeRobert Bosch GmbH

InventorsMichael Kleindl, Tamim Latif, Peter Ropertz, Matthias Maess

Life of this patent

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Abstract

A piston-type fuel pump for an internal combustion engine includes a pump housing, a piston, an annular counterplate, and a non-return outlet valve. The pump housing includes a stepped opening and a piston opening. The piston is guided in the piston opening. The counterplate is pressed into the stepped opening and includes a valve seat. The non-return valve includes a valve element and a guide element. The guide element guides the valve element, is arranged radially outside the valve element and in the stepped opening, and includes a guide section, a retention section, and a support section. The guide section guides the valve element, the retention section is connected to the guide section via a radially extending connecting section, and the support section supports a valve spring. The sections are arranged axially at different points such that the guide section is between the counterplate and the support section.

Claims13

Dependent claims

A piston-type fuel pump for an internal combustion engine, comprising:

a pump housing including a stepped opening and piston opening separate from the stepped opening, the stepped opening having a first stepped portion defining a first inner diameter and a second stepped portion defining a second inner diameter, the first inner diameter greater than the second inner diameter;
a piston guided in the piston opening of the pump housing;
an annular counterplate pressed into the second stepped portion of the second stepped opening and including a valve seat;
and
a non-return outlet valve that includes:
a valve element;
and
a guide element configured to guide movement of the valve element, arranged in the stepped opening of the pump housing, and including:
a guide section configured to guide the valve element;
a retention section connected to the guide section via a radially extending connecting section;
and
a support section configured to support an end of a valve spring,
wherein the guide section, the retention section, and the support section are arranged axially at different points of the guide element such that the guide section is located between the annular counterplate and the support section in an axial direction, and
wherein the guide element is arranged coaxially with respect to and radially outside the valve element.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/817,698Filed 20 Nov 2017 · continuation
Priority: DE 10 2012 211 10728 Jun 2012
Published: US 2018/0073477 A115 Mar 2018
Granted: 16 Jul 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

F04B 1/00
Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
F02M 59/462
Valves: delivery valves
F04B 53/10
Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00:…
F04B 53/1007
Ball valves: having means for guiding the closure member

Family

PCT/EP2013/062578Parent of this continuation · filed 18 Jun 2013
US 2018/0073477 A1Pre-grant publication · published 15 Mar 2018
Application14/410,078Parent of this continuation
US 10,851,752 B2Related patent
US 2015/0316013 A1Published application
US 10,352,284 B2This patent

From the US filing history. Foreign family members aren’t listed.