Fuel injector having a reduced number of components

Patent metadata

Field	Value
Publication number	US-9759172-B2
Application number	US-201113809133-A
Country	US
Kind code	B2
Filing date	May 13, 2011
Priority date	Jul 13, 2010
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A fuel injector which includes an actuator having an electrical contact element, a plug, a fuel supply pipe, and an injection-molded housing part. The plug has a base body, an electrical connection element for an electrical connection with the electrical contact element of the actuator, and a rib which projects from the base body, the injection-molded housing part surrounding the electrical connection element of the plug and being injection-molded on the rib of the plug and the fuel supply pipe.

First claim

What is claimed is:

1. A fuel injector, comprising:
an actuator having an electrical contact element;
a plug having a base body, an electrical connection element for an electrical connection with the electrical contact element of the actuator, and a rib which projects from the base body;
a fuel supply pipe; and
an injection-molded housing part which surrounds the electrical connection element of the plug and is injection-molded onto the rib of the plug and the fuel supply pipe,
wherein the rib of the plug has at least one first formed element which is enclosed by the injection-molded housing part to obtain a secure connection between the rib and the injection-molded housing part, and
wherein the first formed element includes a recess, and
wherein the recess is at least one of a blind hole and a through hole.

2. The fuel injector as recited in claim 1 , wherein the electrical connection element of the plug directly contacts the contact elements of the actuator.

3. The fuel injector as recited in claim 1 , wherein a region of the electrical connection element is routed out of the base body of the plug and is at least four times as long as a region of the electrical connection element situated inside the base body.

4. The fuel injector as recited in claim 1 , wherein the electrical connection element includes a support element which supports the electrical connection element on the fuel supply pipe.

5. The fuel injector as recited in claim 4 , wherein the support element includes at least one clip.

6. The fuel injector as recited in claim 1 , wherein a labyrinth is between the plug and the injection-molded housing part.

7. The fuel injector as recited in claim 1 , wherein the rib of the plug includes a second formed element which is exposed on the rib to allow the plug to be positioned in an injection-mold tool for producing the injection-molded housing part.

8. The fuel injector as recited in claim 1 , wherein the injection-molded housing part fully surrounds the rib.

9. The fuel injector as recited in claim 1 , wherein the first formed element includes the a projecting element.

10. The fuel injector as recited in claim 1 , wherein the first formed element includes at least one of the recess a projecting element and an element having an undercut.

11. The fuel injector as recited in claim 1 , wherein the first formed element includes the an element having the an undercut.

12. A fuel injector, comprising:
an actuator having an electrical contact element;
a plug having a base body, an electrical connection element for an electrical connection with the electrical contact element of the actuator, and a rib which projects from the base body;
a fuel supply pipe; and
an injection-molded housing part which surrounds the electrical connection element of the plug and is injection-molded onto the rib of the plug and the fuel supply pipe,
wherein the rib of the plug extends in a radial direction of the fuel supply pipe and has at least one first formed element which is enclosed by the injection-molded housing part to obtain a secure connection between the rib and the injection-molded housing part,
wherein the first formed element includes at least one straight projecting element,
wherein the at least one straight projecting element projects laterally from the rib,
wherein the fuel supply pipe extends in a longitudinal direction, the longitudinal direction being orthogonal to the radial direction, and
wherein the at least one straight projecting element projects in a lateral direction, the lateral direction being orthogonal to the radial direction and the longitudinal direction.

Assignees

• Wolff Guenter
• Scheffel Martin
• Wieschollek Sebastian
• Bormann Axel
• Bayer Johann
• Bosch Gmbh Robert

Inventors

• Wolff Guenter
• Scheffel Martin
• Wieschollek Sebastian
• Bormann Axel
• Bayer Johann

Classifications

• F02M2200/9015

  Elastomeric or plastic materials · CPC title

• F02M51/005 Primary

  Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus · CPC title

• F02M2200/8015

  Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip · CPC title

• F02M2200/8023

  the assembly involving use of quick-acting mechanisms, e.g. clips · CPC title

• F02M2200/8046

  the manufacture involving injection moulding, e.g. of plastic or metal · CPC title