Combined fuel injection and ignition means

A combined fuel injection and ignition device for a spark-ignition internal combustion engine, comprising an insulator, a fuel flow path having a section thereof encased in the insulator, an ignition path having a section thereof encased in the insulator, the sections of the fuel flow path and the ignition path being in spaced apart relationship and electrically isolated from each other by the insulator, the section of the fuel flow path being defined within a valve structure detachably secured to the insulator so as to be selectively removable therefrom, the ignition path terminating at a first electrode, and the valve structure defining a second electrode cooperating with the first electrode to provide a spark gap.

A combined fuel injection and ignition device for a spark-ignition internal combustion engine, comprising an insulator having a projection, an ignition path having a section thereof encased in the insulator, the ignition path terminating at a first electrode extending outwardly of the insulator, the first electrode having an inner axial section and an outer lateral section which extends towards a second electrode, a portion of the inner axial section being encased in the projection, a fuel flow path defined within a valve structure supported in the insulator, the valve structure defining the second electrode which cooperates with the first electrode to define a spark gap, the sections of the fuel flow path and the ignition path being in spaced apart relationship and electrically isolated from each other by the insulator.

A combined fuel injection and ignition device for a spark-ignition internal combustion engine, comprising a insulating body of ceramic material, a fuel flow path having a section thereof encased in the insulator body and terminating at a delivery port disposed outwardly of the insulator body, an ignition path having a section thereof encased in the insulator body, the sections of the fuel flow path and the ignition path being in spaced apart relationship and electrically isolated from each other by the insulator, the fuel flow path being defined within a valve structure detachably secured to the insulator body so as to be selectively removable therefrom, the ignition path terminating at a first electrode disposed outwardly of the insulator body, the electrode having an inner axial section, an outer lateral section which extends towards a second electrode, and an intermediate section which provides a curved transition between the inner and outer sections, the valve structure defining a second electrode which cooperates with the first electrode to define a spark gap, the insulator body having a projection portion defining a nose beyond which the first electrode extends, and the insulator body having a further projection defining a skirt portion beyond which the delivery port extends.

A combined fuel injection and ignition device for a spark ignited internal combustion engine comprising a fuel delivery path for delivering fuel to a delivery valve and an ignition path for supplying electrical current to a first electrode of an ignition means;

• the fuel flow path and the ignition path being in spaced apart relationship and electrically isolated from each other, the ignition path terminating at a first electrode;
• a second electrode projecting from the delivery valve in the direction of fuel spray;
• said delivery valve being adapted to delivery fuel spray in a pattern which avoids direct impingement on a first portion of said ignition path and which is at least directed into an immediate vicinity of a second portion of said ignition path.

A combined fuel injection and ignition device for a spark-ignition internal combustion engine;

• said combined fuel injection and ignition means comprising a fuel flow path with a delivery valve at a distal end thereof, an ignition path with a first electrode at a distal end thereof, said fuel flow path and said ignition path located in spaced apart relationship and at least a portion of said ignition path being electrically insulated from said fuel flow path, the distal end of the delivery valve providing a second electrode, the first and second electrode cooperating to define a spark gap, said combined fuel injection and ignition means being adapted such that, in use, at least a portion of said ignition path projects internally of said combustion chamber a length sufficient to prevent shorting of electrical energy between said ignition path and a cylinder head of said engine.

A combined fuel injection and ignition device for a spark ignited internal combustion engine comprising a fuel delivery path for delivering fuel to a delivery valve, an ignition path for supplying electrical current to a primary electrode of an ignition means;

• the fuel flow path and the ignition path being in spaced apart relationship and electrically isolated from each other;
• and a secondary electrode for providing a return to ground, the secondary electrode projecting from the delivery valve in the direction of issuance of fuel spray therefrom.