Gas injector having two sealing regions

Patent metadata

Field	Value
Publication number	US-9909537-B2
Application number	US-201514665664-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	Mar 24, 2014
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A gas injector, for injecting gaseous fuel, includes a valve body having a first valve seat and a second valve seat, and a closing element, which has a first sealing region, a second sealing region, a hollow region, which is delimited by a bottom and a wall, and an outlet opening configured in the bottom, the first valve seat sealing at the first sealing region, and the second valve seat sealing at the second sealing region, and at least one through opening being provided in the wall of the closing element, so that the gaseous fuel is able to be expelled both from the inner hollow region and the outer region of the closing element.

First claim

What is claimed is:

1. A gas injector for injecting gaseous fuel, comprising:
a valve body having a first valve seat and a second valve seat; and
a closing element, which includes a first sealing region, a second sealing region, an inner hollow region delimited by a bottom and a wall, and an outlet opening in the bottom;
wherein a first valve seat sealing is at the first sealing region and a second valve seat sealing is at the second sealing region,
wherein there is at least one through hole in the wall of the closing element, so that the gaseous fuel is able to be expelled both from the inner hollow region and at an outer region of the closing element, and
wherein the closing element is an outwardly opening closing element.

2. The injector of claim 1 , wherein the valve body includes a two-part valve body, and wherein the two-part body includes an outer component and an inner component.

3. A gas injector for injecting gaseous fuel, comprising:
a valve body having a first valve seat and a second valve seat; and
a closing element, which includes a first sealing region, a second sealing region, an inner hollow region delimited by a bottom and a wall, and an outlet opening in the bottom;
wherein a first valve seat sealing is at the first sealing region and a second valve seat sealing is at the second sealing region,
wherein there is at least one through hole in the wall of the closing element, so that the gaseous fuel is able to be expelled both from the inner hollow region and at an outer region of the closing element,
wherein the valve body includes a two-part valve body, and wherein the two-part body includes an outer component and an inner component, and
wherein the first valve seat is provided on the outer component and the second valve seat on the inner component, and wherein the inner component is situated in the inner hollow region of the closing element.

4. A gas injector for injecting gaseous fuel, comprising:
a valve body defining a longitudinal axis and having a first valve seat and a second valve seat; and
a closing element, which includes a first sealing region, a second sealing region, an inner hollow region delimited by a bottom and a wall, and an outlet opening in the bottom;
wherein a first valve seat sealing is at the first sealing region and a second valve seat sealing is at the second sealing region,
wherein there is at least one through hole in the wall of the closing element, so that the gaseous fuel is able to be expelled both from the inner hollow region and at an outer region of the closing element,
wherein the valve body includes a two-part valve body, and wherein the two-part body includes an outer component and an inner component, and
wherein the inner component is displaceable in a direction of the longitudinal axis.

5. The injector of claim 4 , further comprising:
a compression element, which pretensions the inner component.

6. The injector of claim 5 , wherein the inner component is pretensioned in an opening direction.

7. The injector of claim 2 , wherein the closing element is guided at the inner component or at the outer component.

8. The injector of claim 2 , wherein the inner component is a cylinder and/or the outer component is a hollow cylinder.

9. The injector of claim 5 , wherein a maximum lift of the inner component enabled by the compression element is smaller than a maximum lift of the closing element.

10. An internal combustion engine, comprising:
an injector for injecting gaseous fuel, including:
a valve body having a first valve seat and a second valve seat; and
a closing element, which includes a first sealing region, a second sealing region, an inner hollow region delimited by a bottom and a wall, and an outlet opening in the bottom;
wherein a first valve seat sealing is at the first sealing region and a second valve seat sealing is at the second sealing region,
wherein there is at least one through hole in the wall of the closing element, so that the gaseous fuel is able to be expelled both from the inner hollow region and at an outer region of the closing element,
wherein the injector is situated directly at a combustion chamber of the internal combustion engine for a direct injection, and
wherein the closing element is an outwardly opening closing element.

11. The injector of claim 1 , wherein the closing element is guided at the valve body.

Assignees

• Bosch Gmbh Robert

Inventors

• Hamada Raed
• Jaegle Felix
• Schoefer Joerg

Classifications

• F02M21/0275 Primary

  for in-cylinder direct injection, e.g. injector combined with spark plug · CPC title

• F02M21/0269

  Outwardly opening valves, e.g. poppet valves · CPC title

• F02M21/0263

  Inwardly opening single or multi nozzle valves, e.g. needle valves · CPC title

• Y02T10/32

  Cross-Sectional Technologies · mapped topic

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title