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Quantity control valve and high-pressure pump with quantity control valve

A technology for controlling valves and high-pressure pumps, which is applied in the field of high-pressure pumps to achieve the effects of reducing mechanical load, reducing rebound speed, and reducing electrical power loss

Active Publication Date: 2014-08-27
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem underlying the invention is solved by a quantity control valve according to claim 1

Method used

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  • Quantity control valve and high-pressure pump with quantity control valve
  • Quantity control valve and high-pressure pump with quantity control valve
  • Quantity control valve and high-pressure pump with quantity control valve

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A fuel system 1 of an internal combustion engine is shown in a very simplified illustration. A high-pressure pump 2 , not explained in detail, which is designed as a piston pump, is connected upstream via a suction line 3 , a prefeed pump 4 and a low-pressure line 5 to a fuel tank 6 . Downstream, a high-pressure accumulator 8 (“common rail”) is connected via a high-pressure line 7 to the high-pressure pump 2 . A quantity control valve 10 with electromagnetic actuation (hereinafter referred to as actuator 11 ) is arranged hydraulically between low-pressure line 5 and high-pressure pump 2 and forms an inlet valve for high-pressure pump 2 . Other components, such as the discharge valve of the high-pressure pump 2 figure 1 not shown in It goes without saying that the volume control valve can be integrated into the high-pressure pump 2 .

[0027] When the fuel system 1 is in operation, the prefeed pump 4 conveys fuel from the fuel tank 6 into the low-pressure li...

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Abstract

A quantity control valve (10), in particular for metering a fluid for a downstream high-pressure pump (2), with an axially movable valve needle (14) and a valve element (16) that can be impinged upon by the valve needle (14) in an opening direction, wherein the valve element (16) delimits a damping chamber (26), wherein an annular gap (31) with at least one protrusion (32) is present between a wall (25) of the damping chamber (26) and the valve element (16).

Description

technical field [0001] The invention relates to a quantity control valve according to the preamble of claim 1 and a high-pressure pump with a quantity control valve according to independent claim 10 . Background technique [0002] A quantity control valve for a downstream high-pressure pump is disclosed, in particular for dosing fluids. For example, it is used in common rail fuel systems of motor vehicles as a quantity control valve in order to control the flow of fuel fed into the common rail by a high-pressure delivery pump. Such quantity control valves can be actuated electromagnetically. The volume control valve includes a needle-armature combination. The electromagnet and spring, which are part of the needle-armature assembly, act on the valve element of the volume control valve. The impingement of the needle-armature assembly into the open or closed end position of the quantity control valve leads, especially at low rotational speeds, to an oscillation excitation wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/36
CPCF02M2200/28F02M59/367Y10T137/85986F02M2200/304F16K31/0689
Inventor R·维尔姆斯M·梅斯D·布伦纳
Owner ROBERT BOSCH GMBH
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