Siemens Automotive Corporation

Siemens Vdo Automotive Corporation

Harry Ronald Brooks

Michael P Dallmeyer

Ross W Wood

Vernon R Warner

James H Cohen

Jeff B Pace

A modular fuel injector for an internal combustion engine, including a valve group subassembly and a power group subassembly. The valve group subassembly includes a first stator member, a second stator member, a non-magnetic shell disposed between the first and second stator members, a valve body, and an armature member. The armature member defines a first working air gap with the first stator member and a second working air gap with the second stator member. The armature member includes a closure member proximate an outlet end and contiguous to a seat in a first configuration. The power group subassembly includes an electromagnetic coil surrounding the passage, a housing encasing the coil, and an ovemold encapsulating the coil and the housing. The coil is energizable to provide magnetic flux that flows through the first and second working air gaps in the direction of the longitudinal axis.

Modular fuel injector with di-pole magnetic circuit

A fuel injector having a housing including an inlet, an outlet, and a passageway for fuel flow from the inlet to the outlet. A coil assembly is disposed proximate the inlet of the fuel injector. A seat is disposed proximate the outlet of the fuel injector. A closure member is disposed in the housing and operable by the coil assembly to permit and prohibit fuel flow through the seat. The closure member includes a strap member that extends along a longitudinal axis and has at least two radial projections and a central member. The strap member includes an outer surface a distance D from the longitudinal axis. The at least two radial projections having first and second ends. A sealing member is coupled to the central member. An armature member is coupled to the second ends of the strap member. Also, a method for forming the strap member.

Closure member with armature strap

A fuel injector for use in a internal combustion engine is disclosed. The fuel injector includes a body having a discharge end and a longitudinal axis extending therethrough, and an electromagnetic coil located within the body. The fuel injector further includes a fuel metering valve operable between an open position and a closed position and an air metering valve operable between an open position and a closed position. The fuel injector also includes a valve seat located within the body proximate to the discharge end and includes an orifice extending therethrough along the longitudinal axis. A needle is reciprocally mounted along the longitudinal axis between an open position and a closed position. The needle has an upstream end, a downstream end, and a needle channel extending therethrough along the longitudinal axis. The needle engages the valve seat in the closed position. A guide is disposed along the longitudinal axis such that the upstream end of the needle is reciprocable within the guide. A seal having a seal opening therethrough is located within the guide. A bellows fluidly connects the seal opening and the needle channel. The bellows and the guide form a generally annular chamber therebetween. The bellows is movable between a compressed and an extended position. The annular chamber is adapted to receive fuel. The seal prevents the fuel in the annular chamber from entering the needle channel. A method of operating the fuel injector is also disclosed.

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Newport News, VA, United States of America

Harry Ronald Brooks