Long injector for fuel injection into an internal combustion engine
View Patent ↗Various embodiments may include a long injector for fuel injection comprising: a base portion and an extension portion electrically connected to the base portion. An end of the extension portion may include an electrically conductive terminal with contact clips. The contact clips are spaced at a distance from each other or from a side wall of the electrically conductive terminal. An end of the base portion comprises electrical contacts positioned so each of the electrical contacts can slide into a contact clip of the electrically conductive terminal. The electrically conductive terminal includes a latch mechanism. An electrical connection between the base portion and the extension portion is created when the electrical contacts are inserted into the contact clip and held by the latch mechanism. The long injector further comprises an overmolded body encapsulating the electrical connection between the base portion and the extension portion.
1. A long injector for fuel injection into an internal combustion engine, the long injector comprising:
a base portion; and
an extension portion electrically connected to the base portion; and
an encapsulation body molded over the base portion and the extension portion, wherein the base portion and the extension portion cannot be separated without destroying the encapsulation body;
wherein a first end of the extension portion comprises an electrically conductive terminal with one or more contact clips;
the one or more contact clips are spaced at a distance from each other or from a side wall of the electrically conductive terminal;
a first end of the base portion comprises one or more electrical contacts positioned at the first end of the base portion in such a way that each of the one or more electrical contacts can slide into a respective contact clip of the electrically conductive terminal when connecting the extension portion to the base portion;
the electrically conductive terminal includes a latch mechanism;
an electrical connection between the base portion and the extension portion is created when each of the one or more electrical contacts is inserted into the respective contact clip and held by the latch mechanism.
2. A long injector according to claim 1 , wherein the one or more contact clips comprise an elastic material; and
the one or more electrical contacts are compressed by the elastic material of the one or more contact clips.
3. A long injector according to claim 1 , wherein the first end of the base portion further comprises one or more ribs positioned in such a way that each rib can be inserted into a distance between two contact clips of the extension portion or a distance between a contact clip and a side wall of the electrically conductive terminal.
4. A fuel injection system of an internal combustion engine, the system comprising:
a combustion chamber; and
a long injector dosing fuel into the combustion chamber;
wherein the long injector comprises:
a base portion;
an extension portion electrically connected to the base portion; and
an encapsulation body molded over the base portion and the extension portion, wherein the base portion and the extension portion cannot be separated without destroying the encapsulation body;
wherein a first end of the extension portion comprises an electrically conductive terminal with one or more contact clips;
the one or more contact clips are spaced at a distance from each other or from a side wall of the electrically conductive terminal;
a first end of the base portion comprises one or more electrical contacts positioned at the first end of the base portion in such a way that each of the one or more electrical contacts can slide into a respective contact clip of the electrically conductive terminal when connecting the extension portion to the base portion;
the electrically conductive terminal includes a latch mechanism;
an electrical connection between the base portion and the extension portion is created when each of the one or more electrical contacts is inserted into the respective contact clip and held by the latch mechanism.
5. A fuel injection system according to claim 4 , further comprising a fuel rail having an outlet port;
wherein the long injector is mechanically and hydraulically coupled to the outlet port in nondestructively separable fashion.
6. A fuel injection system according to claim 4 , wherein the combustion chamber is arranged in a cylinder head and the electrical connection is arranged in a bore of the cylinder head.
7. A vehicle comprising:
a combustion chamber;
a drive mechanism driven by combustion of fuel in the combustion chamber; and
a long injector dosing fuel into the combustion chamber;
wherein the long injector comprises:
a base portion;
an extension portion electrically connected to the base portion; and
an encapsulation body molded over the base portion and the extension portion, wherein the base portion and the extension portion cannot be separated without destroying the encapsulation body;
wherein a first end of the extension portion comprises an electrically conductive terminal with one or more contact clips;
the one or more contact clips are spaced at a distance from each other or from a side wall of the electrically conductive terminal;
a first end of the base portion comprises one or more electrical contacts positioned at the first end of the base portion in such a way that each of the one or more electrical contacts can slide into a respective contact clip of the electrically conductive terminal when connecting the extension portion to the base portion;
the electrically conductive terminal includes a latch mechanism;
an electrical connection between the base portion and the extension portion is created when each of the one or more electrical contacts is inserted into the respective contact clip and held by the latch mechanism.
8. A method for manufacturing a long injector for fuel injection into an internal combustion engine, the method comprising:
providing an extension portion, wherein an end of the extension portion comprises an electrically conductive terminal with one or more contact clips, wherein the one or more contact clips are spaced at a distance from each other or from a side wall of the electrically conductive terminal;
providing a base portion, wherein an end of the base portion comprises one or more electrical contacts, wherein each of the one or more electrical contacts is positioned in such a way, that each of the one or more electrical contacts can slide into a respective contact clip of the electrically conductive terminal when connecting the extension portion to the base portion;
electrically connecting the extension portion to the base portion by inserting the one or more electrical contacts into the respective contact clip until each of the one or more electrical contacts is held by a latch mechanism of the electrically conductive terminal; and
overmolding the electrical connection to produce an encapsulation body encapsulating the electrical connection between the base portion and the extension portion, wherein the base portion and the extension portion cannot be separated without destroying the encapsulation body.
9. A method according to claim 8 , wherein the electrical connection is overmolded with a resin or a thermoplastic material to produce the encapsulation body.
10. A method according to claim 8 , wherein the one or more contact clips comprise an elastic material; and
electrically connecting the extension portion to the base portion comprises compressing the one or more electric contacts by the elastic material of the one or more contact clips.
11. A method according to claim 8 , further comprising providing one or more ribs at the end of the base portion, which are positioned in such a way, that each of the one or more ribs can be inserted into a distance between two contact clips or a distance between a contact clip and a side wall of the electrically conductive terminal.