Injection valve

Patent metadata

Field	Value
Publication number	US-9765743-B2
Application number	US-201313890839-A
Country	US
Kind code	B2
Filing date	May 9, 2013
Priority date	May 10, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

An injection valve may have a nozzle body with a longitudinal axis, in which a nozzle body aperture and at least one injection opening are arranged, wherein the nozzle body aperture can be coupled hydraulically to a high-pressure circuit for a fluid, at least one nozzle needle arranged in an axially movable manner in the nozzle body aperture, wherein the nozzle needle prevents fluid flow through the at least one injection opening in a closing position and allows fluid flow through the at least one injection opening outside the closing position, an actuator housing, which is designed to accommodate an actuator designed to act on the nozzle needle, and at least one fluid line, which is designed for hydraulic coupling to the high-pressure circuit for the fluid and is constructed and arranged separately from the actuator housing, and is directly coupled hydraulically to the nozzle body aperture.

First claim

What is claimed is:

1. An injection valve comprising:
a nozzle body having a longitudinal axis and comprising a fluid inlet in fluid communication with a nozzle body aperture, and at least one injection opening, wherein the fluid inlet is hydraulically connectable to a high-pressure circuit for a fluid,
at least one nozzle needle arranged in the nozzle body aperture in an axially movable manner, wherein the nozzle needle is configured to prevent fluid flow through the at least one injection opening in a closing position and configured to allow fluid flow through the at least one injection opening in a non-closing position,
an actuator moving the at least one nozzle needle between the closing position and the non-closing position, the actuator disposed in an actuator housing separate from the nozzle body, and
at least two fluid lines configured for coupling the fluid inlet to the high-pressure circuit for the fluid, the at least two fluid lines arranged separate from the actuator housing and directly hydraulically coupled to the nozzle body aperture through the fluid inlet.

2. The injection valve of claim 1 , wherein the fluid inlet is arranged substantially coaxially with the actuator housing and the nozzle body.

3. The injection valve of claim 1 , wherein a fluid reservoir is formed in at least one element of the group consisting of the fluid lines and the hydraulic connection element.

4. The injection valve of claim 1 , wherein each of the at least two fluid lines extend in an axial direction parallel to the longitudinal axis of the nozzle body and located at a side of the actuator housing, from the nozzle body to an electric interface of the injection valve arranged at an opposite end of the actuator housing from the nozzle body.

5. The injection valve of claim 1 , wherein the nozzle body, the actuator housing, an electric interface for connection of the actuator, and the fluid inlet are arranged in order in the direction of the longitudinal axis.

6. An internal combustion engine, comprising:
a high-pressure circuit comprising a high pressure chamber configured to store fuel, and
an injection valve comprising:
a nozzle body having a longitudinal axis, a fluid inlet, a nozzle body aperture, and at least one injection opening, wherein the nozzle body aperture is hydraulically connected to the fluid inlet,
at least one nozzle needle arranged in the nozzle body aperture in an axially movable manner, wherein the nozzle needle is configured to prevent fluid flow through the at least one injection opening in a closing position and configured to allow fluid flow through the at least one injection opening in a non-closing position,
an actuator housing connected to the nozzle body,
an actuator disposed in the actuator housing and configured to act on the nozzle needle, and
at least two fluid lines coupling the high-pressure circuit for the fluid to directly to the fluid inlet, the at least two fluid lines arranged separate from the actuator housing.

7. The internal combustion engine of claim 6 , wherein the hydraulic connection element is arranged substantially coaxially with the actuator housing and the nozzle body.

8. The internal combustion engine of claim 6 , wherein a fluid reservoir is formed in at least one element of the group consisting of the fluid lines and the hydraulic connection element.

9. The internal combustion engine of claim 6 , wherein each of the at least two fluid lines extend in an axial direction parallel to the longitudinal axis of the nozzle body and located at a side of the actuator housing, from the nozzle body to an electric interface of the injection valve arranged at an opposite end of the actuator housing from the nozzle body.

10. The internal combustion engine of claim 6 , wherein the nozzle body, the actuator housing, an electric interface for connection of the actuator, and a hydraulic connection element of the fluid line are arranged in order in the direction of the longitudinal axis.

Assignees

• Continental Automotive Gmbh

Inventors

• Schurz Willibald
• Simmet Martin
• Schmutzler Gerd

Classifications

• F02M2200/03

  Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations · CPC title

• F02M51/0603

  using piezoelectric or magnetostrictive operating means · CPC title

• F02M69/04 Primary

  Injectors peculiar thereto · CPC title

• F02M2200/40

  Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator · CPC title

• F02M55/02 Primary

  Conduits between injection pumps and injectors {, e.g. conduits between pump and common-rail or conduits between common-rail and injectors} · CPC title