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Fuel injection valve

A technology of fuel injection valve and fuel injection device, which is applied in the direction of fuel injection device, special fuel injection device, valve details, etc., can solve the problems of high position requirement, difficult design, function and life damage of fuel injection valve function and life, etc. , to achieve the effect of small location requirements, less interference, and no delay in travel change

Inactive Publication Date: 2004-07-21
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages here are in particular the difficult design of the hydraulic system for reversing, the space requirements for such a hydraulic system are high
Leakage losses of the hydraulic fluid and consequent impairment of the function and life of the hydraulic system and thus of the entire fuel injection valve are disadvantageous

Method used

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  • Fuel injection valve
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Examples

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Embodiment Construction

[0022] FIG. 1 shows a first exemplary embodiment of a fuel injector 1 according to the invention in an axial sectional view. The fuel injector is particularly suitable for injecting fuel, in particular gasoline, directly into the combustion chamber of preferably a hybrid compression forced ignition internal combustion engine. The fuel injector 1 shown only very schematically in FIG. 1 is an inwardly opening fuel injector 1 .

[0023] The fuel injection valve 1 has a valve closing body 2 which cooperates with a valve seat surface 4 formed on a valve seat body 3 to form a sealing surface.

[0024] An actuator 5 consists, for example, of a disk-shaped element 6 and surrounds a tubular valve needle 13 annularly. The disk-shaped elements 6 of the actuator 5 are made of a piezoelectric or magnetostrictive material and can be glued together. The actuator 5 is fastened at one end to a first lever arm 7 of a plurality of pivotable tilting elements 8 .

[0025] The pivotable tilting ...

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PUM

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Abstract

A fuel injection valve (1), in particular, for fuel injection device in internal combustion engines has a valve closing body (2) which can be operated by an actuator (5) using a valve needle (13). Said closing body interacts with a valve seat surface (4) to form a tight seal. Pivotable vibrating elements (8) are arranged between the actuator (5) and the valve needle (13) in such a way that the actuator (5) engages at the first lever arms (7) of the pivotable vibrating elements (8) and the second lever arms (11) are interactively connected with the valve needle (13).

Description

technical field [0001] The invention relates to a fuel injection valve, in particular to an injection valve for a fuel injection system of an internal combustion engine. Background technique [0002] A fuel injection valve of the type specified in the independent claims is known from DE 195 34 445 C2, in which a piezoelectric actuator is provided for actuating a valve needle connected to a valve closing body. The valve closing body cooperates with a valve seat surface to form a sealing surface. [0003] A disadvantage of this known design is that a relatively large stroke force is required for a relatively small stroke displacement of the piezo actuator, which is formed from a plurality of piezoelectric layers arranged in a stack. [0004] Furthermore, the fuel injectors described in this document can only be realized either in valves opening inwards or in valves opening outwards. However, there are different requirements for the valves, including openings directed inwards...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B75/12F02M51/06F02M63/00F16K31/02F16K31/52
CPCF02M2200/702F02B2075/125F02M2200/701Y02T10/123F02M51/0603Y02T10/12
Inventor 沃尔夫冈·吕勒胡贝特·斯蒂尔马蒂亚斯·博伊京特·霍尔诺贝特·凯姆
Owner ROBERT BOSCH GMBH