Proportional valve that can be electromagnetically actuated and high-pressure fuel pump having such a proportional valve

A proportional valve, high-pressure pump technology, used in fuel injection pumps, fuel injection devices, special fuel injection devices, etc., can solve the problems of no longer ensuring dosing, easy damage, hydraulic bypass, etc., to eliminate the damage of sealing elements. Dangerous, durable, simplified installation effect

Inactive Publication Date: 2017-08-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because in the absence of a centering device to ensure that the O-ring of the radial seal is subjected to uniform compression, the O-ring may be easily damaged when the magnetic core is placed in the casing bore of the high-pressure pump
Furthermore, during manual assembly there is a risk of particle formation through contact of the magnetic core with the pump housing
During high-pressure pump operation, pressure pulsations and vibrations can then lead to relative movements of the O-ring relative to the magnetic core and / or the pump housing and thus to increased wear
As a result hydraulic bypasses can occur so that correct dosing is no longer ensured

Method used

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  • Proportional valve that can be electromagnetically actuated and high-pressure fuel pump having such a proportional valve
  • Proportional valve that can be electromagnetically actuated and high-pressure fuel pump having such a proportional valve
  • Proportional valve that can be electromagnetically actuated and high-pressure fuel pump having such a proportional valve

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Experimental program
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Embodiment Construction

[0025] exist figure 1 The proportional valve shown in is fitted to the fuel high pressure pump. The connection takes place via the collar bush 6 which is pressed into the receiving bore 16 of the housing part 10 of the high-pressure fuel pump. The adapter part 9 , which is likewise pressed into the receiving bore 16 , is placed on the collar bush 6 . The receiving bore 16 is designed as a stepped bore for this purpose. The adapter part 9 has a cone 11 which facilitates the placement of the electromagnet 1 for actuating the proportional valve when mounted on the high-pressure fuel pump. because if by figure 2 As is known, the installation of the solenoid 1 takes place only after the flange bush 6 and the adapter piece 9 have been pressed into the receiving borehole 16 of the housing part 10 of the high-pressure fuel pump.

[0026] The electromagnet 1 is accommodated together with the armature 2 in an injection-molded pot-shaped housing part 7 of the proportional valve. Th...

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Abstract

The invention relates to a proportional valve that can be electromagnetically actuated for controlling the delivery rate of a high-pressure fuel pump, comprising an electromagnet (1) for acting on an armature (2) that can be moved in a reciprocating manner, wherein the armature (2) is coupled to an axially movable valve piston (4) by means of a tappet (3) such that the stroke of the armature (2) causes an axial movement of the valve piston (4) against the spring force of a spring (5). According to the invention, the axially movable valve piston (4) is accommodated in a flanged bush (6), by means of which the proportional valve can be connected to a housing part (7) of the high-pressure fuel pump. The invention further relates to a high-pressure fuel pump having such a proportional valve for controlling the delivery rate.

Description

technical field [0001] The invention relates to an electromagnetically actuatable proportional valve having the features of the preamble of claim 1 . The invention also relates to a high-pressure fuel pump having such a proportional valve for regulating the delivery volume. Background technique [0002] A metering unit for a high-pressure pump of a fuel injection system, in particular a common rail injection system, is known from the publication DE 10 2011 017 495 A1, which metering unit includes solenoid valves. The solenoid valve has a magnetic core with a central bore in which the valve piston is received so as to be movable back and forth. The valve piston has control slots arranged on the peripheral surface, which release or close a defined flow cross section depending on the axial position of the valve piston. The axial position of the valve piston can be changed by means of an electromagnet which interacts with the armature tappet unit for this purpose. The tappet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/34F02M59/36F02M59/46F02M59/48F02M63/00
CPCF02M59/34F02M59/366F02M59/466F02M59/485F02M63/0071F02M2200/16F02M2200/8061
Inventor M·伊姆霍夫
Owner ROBERT BOSCH GMBH
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