Fuel injector having fault tolerant connection
AssigneeSiemens Automotive Corporation
InventorsJingming J. Shen, Gyula A. Huszar
Life of this patent
Estimating the term…
Abstract
A fuel injector with a valve body having an inlet, an outlet, and an axially extending fuel passageway from the inlet to the outlet. An armature proximate the inlet of the valve body. A needle valve operatively connected to the armature. A valve seat proximate the outlet of said valve body. A fault tolerant structural connection between the valve seat and valve body that also provides a hermetic seal between the valve seat and valve body.
Claims20
A fuel injector comprising:
- a valve body having an inlet, an outlet, and an axially extending fuel passageway from the inlet to the outlet;
- an armature proximate the inlet of the valve body;
- a needle valve operatively connected to the armature;
- a valve seat proximate the outlet of said valve body;
- and
- a fault tolerant structural connection that includes first and second connections between the valve seat and the valve body, the first connection including a crimped end section of the valve body, and the second connection including a hermetic weld.
A fuel injector comprising:
- a valve body having an inlet, an outlet, and an axially extending fuel passageway from the inlet to the outlet;
- an armature proximate the inlet of the valve body;
- a needle valve operatively connected to the armature;
- a valve seat proximate the outlet of said valve body, the valve seat comprises a chamfer a approximately 60° included angle;
- and
- a fault tolerant structural connection between the valve seat and valve body, the fault tolerant structural connection including a crimped end section of the valve body that engages the valve seat and a hermetic seal between the valve body and valve seat, the crimped end section of the valve body comprises a chamfer of approximately 70° included angle.
A method of securing a valve seat to a valve body in a fuel injector comprising:
- locating a valve seat within the end of a valve body;
- crimping an end section of the valve body to the valve seat;
- and
- welding the crimped end section of the valve body to the valve seat.
A method of securing a valve seat to a valve body in a fuel injector, the method comprising:
- providing a valve seat with a chamfer of 60° included angle;
- providing an end section of a valve body with a chamfer of 20° includes;
- locating the valve seat within the end section of the valve body;
- crimping the end section of the valve body to the valve seat with a 70° included angle;
- and
- welding the crimped end section of the valve body to the valve seat.
Dependencies are inferred from the claim text.