Holder for fastening a fuel distributor to an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9714635-B2
Application number	US-201414786047-A
Country	US
Kind code	B2
Filing date	Feb 26, 2014
Priority date	Apr 23, 2013
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A holder for attachment of a component, in particular a fuel distributor, to an internal combustion engine includes: at least one decoupling element, an attachment body, an attachment element, and a holding element. The attachment body is attached to the internal combustion engine by way of the attachment element. The holding element is attached to the attachment body via the decoupling element. The decoupling element is shaped in such a way that in at least one spatial direction, a nonlinear spring characteristic curve, which describes a correlation of a return force acting on the holding element with a deflection of the holding element relative to the attachment body, is predefined.

First claim

The invention claimed is:

1. A holder for attaching a component to an internal combustion engine, comprising:
at least one decoupling element;
an attachment body;
an attachment unit; and
a holding element;
wherein the attachment body is configured to be attached to the internal combustion engine by way of the attachment unit, and the holding element is attached to the attachment body via the decoupling element, the decoupling element being shaped in such a way that in at least one spatial direction a nonlinear spring characteristic curve, which describes a correlation of a return force acting on the holding element with a deflection of the holding element relative to the attachment body, is predefined.

2. The holder as recited in claim 1 , wherein the decoupling element is shaped in such a way that at least in an axial direction along an axis of the attachment body, a nonlinear spring characteristic curve, which describes a correlation of a return force acting on the holding element along the axis of the attachment body with a deflection of the holding element along the axis of the attachment body relative to the attachment body, is predefined.

3. The holder as recited in claim 1 , wherein the decoupling element is shaped in such a way that at least in a radial direction which is oriented perpendicularly to an axis of the attachment body, a nonlinear spring characteristic, which describes a correlation of a return force acting on the holding element along the radial direction with a deflection of the holding element along the radial direction relative to the attachment body, is predefined.

4. The holder as recited in claim 1 , wherein the decoupling element is shaped in such a way that a first radial direction and a second radial direction, which are oriented perpendicularly to an axis of the attachment body, exist, for which a first spring characteristic curve that describes a correlation of a return force acting on the holding element along the first radial direction with a deflection of the holding element along the first radial direction relative to the attachment body, and a second spring characteristic curve that describes a correlation of a return force acting on the holding element along the second radial direction with a deflection of the holding element along the second radial direction relative to the attachment body, are different.

5. The holder as recited in claim 1 , wherein at least one of:
the decoupling element has at least one conformation which interacts in positively fitting fashion with a conformation of the holding element; and
the decoupling element has at least one conformation which interacts in positively fitting manner with a conformation of a preload element which is connected to the attachment body.

6. The holder as recited in claim 1 , wherein at least one of (i) the decoupling element has at least one recess configured at the rim of an enveloping surface of the decoupling element, and (ii) the decoupling element has at least one recess configured inside an enveloping surface of the decoupling element.

7. The holder as recited in claim 6 , wherein the recess at the rim of the enveloping surface of the decoupling element is configured as one of an edge radius, a bevel that extends over less than half of an axial thickness of the decoupling element along an axis of the attachment body, or a chamfer that extends over at least half of an axial thickness of the decoupling element along the axis of the attachment body.

8. The holder as recited in claim 6 , wherein at least one of (i) the decoupling element has at least one step at at least one enveloping surface, and (ii) the decoupling element has at least one step at at least one end surface.

9. The holder as recited in claim 7 , wherein the decoupling element has, at the at least one end surface, a contact geometry that varies in a circumferential direction with respect to an axis of the attachment body.

10. The holder as recited in claim 9 , wherein at least one of (i) the contact geometry at the end surface of the decoupling element is segmented in the circumferential direction, and (ii) a radial contact component of the contact geometry at the end surface of the decoupling element varies in the circumferential direction.

11. The holder as recited in claim 8 , wherein the decoupling element is braced one of at the recess or at the end surface of the decoupling element, by at least one of the holding element and at least one countermember.

12. The holder as recited in claim 1 , wherein the decoupling element is not impinged upon by attachment force applied by said attachment unit.

13. The holder as recited in claim 1 , wherein the decoupling element has a conformation having a bulge-shaped configuration.

14. The holder as recited in claim 1 , wherein the decoupling element has a conformation configured as a depression.

Assignees

• Bosch Gmbh Robert

Inventors

• Rehwald Andreas
• Lang Klaus

Classifications

• F02M69/465 Primary

  of fuel rails · CPC title

• F02B77/00

  Component parts, details or accessories, not otherwise provided for · CPC title

• F16B5/02

  by means of fastening members using screw-thread ({F16B5/0004 takes precedence}; construction of screw-threaded connections F16B25/00 - F16B39/00) · CPC title

• F02M2200/09

  Fuel-injection apparatus having means for reducing noise · CPC title

• F16B31/028

  with a load-indicating washer or washer assembly · CPC title