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Electromagnetically actuated fuel injection valve

  • US 3,967,597 A
  • Filed: 09/23/1974
  • Issued: 07/06/1976
  • Est. Priority Date: 10/03/1973
  • Status: Expired due to Term
First Claim
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1. An electromagnetically actuatable fuel injection valve, comprising:

  • a. a housing;

    b. a magnetic core, affixed coaxially to and within the housing;

    c. a magnetic winding, fixedly surrounding said magnetic core within said housing;

    d. a magnetic armature, movably disposed within said housing, coaxial with said magnetic core and separated therefrom by an air gap, said magnetic armature being provided with a central, longitudinal bore; and

    e. a valve needle, disposed and guided within a bore of said housing, coaxial with said armature and said core, said valve needle being provided at one of its ends with a series of generally parallel lands and interposed grooves, said end being received within the bore of the armature so that said series of lands and grooves cooperate with the inner wall of the bore to form a press-fit connection of the valve needle and armature, and at the other of its ends with at least one groove formed in its outer surface which establishes a passage between that valve needle and the housing bore for the flow of fuel through the housing bore.

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