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Fuel Rail Injector Clip Stainless Steel

IP.com Disclosure Number: IPCOM000016510D
Published in the IP.com Journal: Volume 3 Issue 7 (2003-07-25)
Included in the Prior Art Database: 2003-Jul-25
Document File: 1 page(s) / 132K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Fuel rails which need an injector usually have an injector clip with a Cr(VI)-free coating layer. Unfortunately friction between the contact surfaces may damage the layer during the assembly of the electro-injector (EI) and the fuel rail. In fact in the current process at first the clip is assembled on the injector (Fig. 1, left), then the clip and the injector group is fixed on the fuel rail injector cup (Fig. 1, right). During this process the coating may be damaged, which compromises the corrosion resistance of the parts.

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© SIEMENS AG 2003 file: 2003J00523.doc page: 1

Fuel Rail Injector Clip Stainless Steel

Idea: Federico Zimmitti, IT-Pisa; Paolo Campanella, IT-Pisa; Davide Matteini, IT-Pisa

Fuel rails which need an injector usually have an injector clip with a Cr(VI)-free coating layer. Unfortunately friction between the contact surfaces may damage the layer during the assembly of the electro-injector (EI) and the fuel rail.

In fact in the current process at first the clip is assembled on the injector (Fig. 1, left), then the clip and the injector group is fixed on the fuel rail injector cup (Fig. 1, right). During this process the coating may be damaged, which compromises the corrosion resistance of the parts.

A proposal to solve the problem is to use a connection device made of stainless steel (Fig. 2). An injector clip made of stainless steel does not need any coating which could be damaged during the assembling process. This improves the corrosion resistance and saves the cost for the coating while the process, which is economical and fast, maintains the same.

Fig. 1: Assembly of the clip on the injector (left) and assembly on the injector cup (right)

clip

injector cup injector

injector

Fig. 2: Example of an injector clip

1) surfaces being in touch with the injector 2) connection slot for fuel rail cup 3) used in assembly process 4) connects the two sides of the clip

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