Valve Assembly for a Fluid Injection Valve and Fluid Injection Valve

Patent metadata

Field	Value
Publication number	US-2016003206-A1
Application number	US-201414765329-A
Country	US
Kind code	A1
Filing date	Mar 21, 2014
Priority date	Mar 28, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

A valve assembly for a fluid injection valve has a longitudinal axis and includes a valve seat and a valve disc. The valve seat has an orifice that is laterally offset from the longitudinal axis. The valve disc has a fluid passage which, in a first angular position of the valve disc, is positioned in such fashion that it overlaps the orifice at an interface of the valve disc and the valve seat to establish a fluid path through the valve disc and the valve seat for dispensing fluid from the valve assembly. The valve disc is rotatable around the longitudinal axis with respect to the valve seat from the first angular position to a second angular position, wherein the valve seat and the valve disc mechanically interact to seal the orifice in the second angular position.

First claim

What is claimed is:

1 . A valve assembly for a fluid injection valve, the valve assembly having a longitudinal axis and comprising a valve seat, a valve disc and a valve stem, wherein:
the valve seat comprises an orifice that is laterally offset from the longitudinal axis, the valve disc comprises a fluid passage which, in a first angular position of the valve disc, overlaps the orifice at an interface of the valve disc and the valve seat to establish a fluid path through the valve disc and the valve seat for dispensing fluid from the valve assembly, the valve disc is rotatable around the longitudinal axis with respect to the valve seat from the first angular position to a second angular position, wherein the valve seat and the valve disc mechanically interact to seal the orifice in the second angular position, the valve stem mechanically interacts with the valve disc to rotate the valve disc around the longitudinal axis, and the valve stem is axially movable with respect to the valve seat and rotationally fixed with respect to the valve seat, and wherein the valve stem is mechanically coupled to the valve disc such that an axial movement of the valve stem is converted to a rotational movement of the valve disc.

2 . The valve assembly of claim 1 , further comprising a spring for pressing the valve disc against the valve seat.

3 . The valve assembly of claim 1 , wherein on of the valve stem and the armature comprises a protrusion and the other one of the valve stem and the armature comprises a channel, wherein the protrusion is configured to engage the channel and move along the channel when the valve stem is moved in axially, and wherein the channel is non-parallel to the longitudinal axis such that the valve stem and the valve disc mechanically interact via the protrusion and the channel to convert an axial movement of the valve stem to a rotational movement of the valve disc.

4 . The valve assembly of claim 1 , further comprising a valve body having a cavity extending from a fluid inlet end to a fluid outlet end, wherein the valve seat is arranged at the fluid outlet end and positionally and rotationally fixed with respect to the valve body, wherein the longitudinal axis extends from the fluid inlet end to the fluid outlet end, and the valve stem and the valve disc are arranged in the cavity.

5 . A fluid injection valve, comprising:
a valve assembly for a fluid injection valve, the valve assembly having a longitudinal axis and comprising a valve seat, a valve disc and a valve stem, wherein; the valve seat comprises an orifice that is laterally offset from the longitudinal axis, the valve disc comprises a fluid passage which, in a first angular position of the valve disc, overlaps the orifice at an interface of the valve disc and the valve seat to establish a fluid path through the valve disc and the valve seat for dispensing fluid from the valve assembly, The valve disc is rotatable around the longitudinal axis with respect to the valve seat from the first angular position to a second angular position, wherein the valve seat and the valve disc mechanically interact to seal the orifice in the second angular position, the valve stem mechanically interacts with the valve disc to rotate the valve disc around the longitudinal axis, and the valve stem is axially movable with respect to the valve seat and rotationally fixed with respect to the valve seat, and wherein the valve stem is mechanically coupled to the valve disc such that an axial movement of the valve stem is converted to a rotational movement of the valve disc, and an actuator assembly configured to move the valve stem axially to thereby rotate the valve disc.

6 . The fluid injection valve of claim 5 , wherein the actuator assembly is operable to displace the valve stem axially to thereby rotate the valve disc.

7 . A fluid injection valve, comprising:
a valve assembly, and an actuator assembly, wherein the valve assembly has a longitudinal axis and comprises a valve seat and a valve disc, wherein the valve seat comprises an orifice that is laterally offset from the longitudinal axis, wherein the valve disc comprises a fluid passage which, in a first angular position of the valve disc, overlaps the orifice at an interface of the valve disc and the valve seat to establish a fluid path through the valve disc and the valve seat for dispensing fluid from the valve assembly, wherein the valve disc is rotatable around the longitudinal axis with respect to the valve seat from the first angular position to a second angular position, wherein the valve seat and the valve disc mechanically interact to seal the orifice in the second angular position, wherein the valve assembly comprises a valve stem that mechanically interacts with the valve disc to rotate the valve disc around the longitudinal axis, wherein the valve assembly comprises a valve body having a cavity extending from a fluid inlet end to a fluid outlet end, wherein the valve seat is arranged at the fluid outlet end and positionally and rotationally fixed with respect to the valve body, wherein the longitudinal axis extends from the fluid inlet end to the fluid outlet end, and wherein the valve stem and the valve disc are arranged in the cavity, wherein the actuator assembly comprises an armature that is axially displaceable with respect to the valve body and rotationally fixed with respect to the valve body, wherein the valve stem mechanically interacts with the valve disc such that a rotation of the valve stem around the longitudinal axis effects a rotation of the valve disc around the longitudinal axis, and wherein the armature is mechanically coupled to the valve stem such that an axial movement of the armature is converted to a rotational movement of the valve stem and the valve disc.

8 . The fluid injection valve of claim 7 , wherein
one of the valve stem and the armature comprises a protrusion and the other one of the valve stem and the armature comprises a channel, wherein the protrusion engages the channel and is configured to move along the channel when the armature is moved axially, wherein the channel is non-parallel to the longitudinal axis such that the valve stem and the armature mechanically interact via the protrusion and the channel to thereby convert an axial movement of the armature to a rotational movement of the valve stem and the valve disc.

9 . The fluid injection valve of claim 7 , wherein the valve assembly further comprises a spring for pressing the valve disc against the valve seat.

10 . The fluid injection valve of claim 5 , wherein the valve assembly further comprises a spring for pressing the valve disc against the valve seat.

11 . The fluid injection valve of claim 5 , wherein one of the valve stem and the armature comprises a protrusion and the other one of the valve stem and the armature comprises a channel, wherein the protrusion is configured to engage the channel and move along the channel when the valve stem is moved in axially, and wherein the channel is non-parallel to the longitudinal axis such that the valve stem and the valve disc mechanically interact via the protrusion and the channel to convert an axial movement of the valve stem to a rotational movement of the valve disc.

12 . The fluid injection valve of claim 5 , wherein the valve assembly further comprises a valve body having a cavity extending from a fluid inlet end to a fluid outlet end, wherein the valve seat is arranged at the fluid outlet end and positionally and rotationally fixed with respect to the valve body, wherein the longitudinal axis extends from the fluid inlet end to the fluid outlet end, and the valve stem an

Assignees

• Continental Automotive Gmbh

Inventors

• Maragliulo Marco

Classifications

• F02M63/0026

  using piezoelectric or magnetostrictive actuators · CPC title

• F02M63/0077

  Valve seat details · CPC title

• F02M63/0075 Primary

  Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring · CPC title

• F02M51/0603

  using piezoelectric or magnetostrictive operating means · CPC title

• F02M51/0682

  the body being hollow and its interior communicating with the fuel flow (F02M51/0675 takes precedence) · CPC title