Abstract: A combustion gas seal assembly adapted for a fuel injector installed in a cylinder head of an engine. The seal assembly includes a hollow adapter adapted to be connected to the cylinder head, an injector case positioned in the adapter, and a flexible annular seal positioned between the case and the adapter. The case and adapter each define opposed annular seat portions contacting one another. At least one of the seat portions of the case and the adapter defines an annular groove in which the flexible annular seal is positioned. The combustion gas seal assembly prevents pressurized combustion gas, originating from an engine combustion chamber, from leaking past the interface between the case and the cylinder head. The assembly also facilitates low cost retrofitting or adaptation of new or different fuel injectors to an existing cylinder head of a conventional engine.

Abstract: Ignition system wiring harnesses are used to carry discrete electrical signals to the fuel igniter devices of spark ignited engines. Externally mounted wiring harnesses are subjected to damage which can cause the engine to run inefficiently. The subject ignition system wiring harness extends through internal passageways in an engine block and a plurality of cylinder heads mounted thereon. The wiring harness is retained at fixed locations by a plurality of spring clip retainers, each of which has a normally flat elongate spring clip deflected around the wiring harness and slidably extending through a pair of slots in a bracket. The spring clip exerts a nearly constant force on the wiring harness as it tries to straighten to its normally flat condition regardless of the cross sectional size of the wiring harness. Thus, one size of spring clip retainer can be used for various sizes of wiring hearness.

Abstract: Prior engine ignition systems for a multicylinder spark ignited engine have been too complex and have incorporated external wiring cables and a plurality of transformer assemblies that placed the individual primary and secondary coils thereof in an external location for better heat dissipation. Thus the cable and transformer assemblies were subject to damage by personnel working on the engine. These problems have been overcome by the engine ignition system including a transformer assembly having an elongate body including a cup portion containing the coils, a base portion, and a stem portion. A conducting core extends through the stem and base portions and a suitable clip connects the core electrically to a spark plug installed in a profiled bore of the cylinder head.

Abstract: Ignition system wiring harnesses are used to carry discrete electrical signals to the fuel igniter devices of spark ignited engines. Externally mounted wiring harnesses are subjected to damage which can cause the engine to run inefficiently. The subject ignition system wiring harness extends through internal passageways in an engine block and a plurality of cylinder heads mounted thereon. The wiring harness is retained at fixed locations by a plurality of spring clip retainers, each of which has a normally flat elongate spring clip deflected around the wiring harness and slidably extending through a pair of slots in a bracket. The spring clip exerts a nearly constant force on the wiring harness as it tries to straighten to its normally flat condition regardless of the cross sectional size of the wiring harness. Thus, one size of spring clip retainer can be used for various sizes of wiring harness.

Abstract: The subject air-fuel ratio control system for an engine includes a fluid-powered broken-link mechanism which is operatively linked between an air-fuel ratio control device and a fuel quantity control member, such as a fuel injection pump rack. During startup of the engine, the mechanism disables the device to permit excess fuel delivery. The device is automatically activated after engine startup by the mechanism solely in combined response to the existence of engine oil pressure and a governor moving the fuel quantity control member from an excess fuel delivery position to a predetermined position referred to as an air-fuel ratio control setting. This construction minimizes the duration and quantity of any smoke produced during engine startup, simplifies the cost and construction of the air-fuel ratio control device, and permits relatively easy adjustment of the air-fuel ratio control setting.

Abstract: A bulkhead-fluid-line connector (10) is disclosed for supporting and directly sealably connecting two fluid lines (20,22) which conduct a pressurized fluid, such as fuel, through a housing wall (16) of an internal combustion engine (18).Unlike conventional bulkhead-fluid line adapters or unions which have a plurality of fluid supply path joints, the connector (10) requires only one fluid supply path joint by directly and sealably connecting the end portions (52,54) of the respective fluid lines (20,22) with a releasable coupler (56).