Abstract: The spray tip of a diesel fuel injector, downstream of a conventional pressure actuated injector needle valve, includes a plug holder used to support and retain a hollow inner plug valve element, containing a number of radial through orifices communicating with an annular groove in the outer peripheral surface of the plug valve element and an outer hoop valve element with a hoop-skirt valve encircling the inner plug valve element. A shrink-fit exists between the hoop-skirt valve and the inner plug valve element to provide for a zero sac volume spray tip. The hoop-skirt valve operates as an integral hoop valve which is expanded relative to the inner plug valve element when supplied with high pressure fuel to form therewith a fuel discharge annulus.

Abstract: A diesel exhaust cleaner and regeneration system with indexing particulate trap for use with a diesel engine, as on a city bus, includes a housing means having a cylindrical intermediate housing, an exhaust inlet means at one end and an exhaust outlet at its opposite end with a shaft operatively journaled in the intermediate housing for rotation about the axis thereof and having one end thereof extending outboard of said exhaust inlet means to permit exterior rotation thereof. A cylindrical trap housing means is fixed to the shaft whereby it is sealingly and rotatably supported in the intermediate housing, the trap housing means including a plurality of circumferentially spaced apart filter supports located concentrically around the shaft with a particulate filter operatively supported in each of the filter supports. A fuel burner means is operatively fixed to the exhaust inlet means with the outlet end of the burner means located in operative axial alignment with one of the filters.

Abstract: An electromagnetic unit fuel injector for use in a multi-cylinder diesel engine has an externally actuated pump for intensifying the pressure of fuel delivered to a pressure actuated injection valve controlling flow discharge out through a spray outlet and which is normally biased to a closed position by a spring. Pressurized fuel from the pump is also supplied via a throttling orifice to a modulated pressure servo control chamber having a servo piston means operatively associated with the injection valve.

Abstract: An electromagnetic fuel injector is provided with a tapered armature valve plate operatively positioned by means of a locator so that it is arranged so as to, in effect, pivot from a spring biased position at which it seats against a valve seat associated with a plurality of orifice discharge passages located concentrically about the axis of the injector to a second position adjacent to the working surface of the pole piece means of the associate solenoid. Preferably, the electromagnetic fuel injector is of the bottom feed type whereby it can be supplied with fuel in excess of the amount to be injected, with the flow path of fuel being arranged so that the excess fuel will purge vapors from the injector and cool the solenoid coil therein.

Abstract: A loading washer assembly includes an annular first washer provided with spaced apart ears on its outer peripheral edge with each of the ears having a return bent portion at its free end, an annular second washer provided with spaced apart notches on its outer peripheral edge for slidably receiving the ears whereby to prevent relative rotation of said washers, the return bent portions of the ears limiting the axial extent of separation of these washers. Each of the washers on their opposed surfaces have circumferentially spaced apart, radial extending raised ribs with the ribs on the first washer rotatively offset from the ribs on the second washer. A normally flat spring ring is interposed between the first washer and the second washer in position so as to be engaged by the opposed sets of ribs whereby the spring ring will be deformed into a wave-like spring upon axial displacement of the first washer toward the second washer.

Abstract: An electromagnetic unit fuel injector for use in a diesel engine includes a housing with a pump therein defined by an externally actuated plunger reciprocable in a bushing and defining therewith a pump chamber open at one end for the discharge of fuel to a spring biased, pressure actuated fuel injection nozzle. The pump chamber is also connected to a supply/spill chamber via a normally open, hollow, ported valve controlled passage to permit the ingress and egress of fuel, the valve being operated by a solenoid. The stator assembly of the solenoid is fixed to the housing over the supply/spill chamber and has a cover fixed thereto to define an armature chamber for a moveable armature. The solenoid pole piece has a stepped bore therethrough to interconnect the armature chamber and the supply/spill chamber. The armature is operatively connected to the valve by a guide pin slidably and sealingly journaled in a non-magnetic bushing fixed in the stepped bore so that the armature chamber remains dry.

Abstract: An electromagnetic unit fuel injector includes a pump assembly having an external actuated plunger reciprocable in a bushing with flow therefrom during a pump stroke being directed to a fuel injection nozzle of the assembly. Fuel flow from the pump can also flow through a passage means, containing a normally open, substantially pressure-balanced control valve actuated by a solenoid assembly in the valve closing direction to block drain flow during a pump stroke, as desired. A piston, actuated by discharge fuel pressure is operatively connected to the control valve to assist the solenoid in holding the control valve in a closed position.

Abstract: A valve train for a reciprocating internal combustion engine has a fulcrum means provided by the follower body of a hydraulic lash adjuster and a rocker arm that define a pair of cooperating outer and inner cylindrical bearing surface contours, respectively, for carrying the reaction forces of rocker arm pivotal movement, the radius of the outer conformation being substantially two times the radius of the inner conformation, with the geometric center of the outer conformation being located within the effective cross sectional area of the stem of an associate valve, the inner conformation of the rocker arm being located such that an extension thereof will intersect the contact point of the rocker arm on the stem end of the valve. Restrainer means are provided to anchor the cooperating cylindrical conformations for substantially rolling action in relation to each other.

Abstract: An otherwise conventional fuel supply system of the type that includes an engine driven distributor type fuel injection pump operatively connected to a diesel engine is modified so as to include a normally closed solenoid actuated valve means operatively associated with the inlet passage means of the pump in a location between the transfer pump of the pump and the injection pump means of the pump; an adaptive torque balancing electronic controlled electric power source being connected to the solenoid actuated valve means, whereby the solenoid actuated valve means is operative to supplement the metering valve control of fuel flow from the transfer pump to the injection pump means whereby the fuel flow to the injection pump means and from the injection pump means to each of the respective injection nozzles for each of the cylinders is controlled as a function of engine operation and the incremental speed difference per preselected degrees of movement among the respective cylinders of the engine.

Abstract: An electromagnetic unit fuel injector for use in a diesel engine includes a housing having a bushing with an externally actuated plunger reciprocable therein to define a pump chamber open at one end for the discharge of fuel to a spring biased, pressure actuated fuel injection nozzle. The pump chamber is connected to a supply/spill chamber means via flow-through solenoid with pivot armature actuated, normally open, hollow pressure sensitive valve to permit the ingress and egress of fuel. The supply/spill chamber means adjacent to the head of the valve is in flow communication with a source of fuel at a relatively low supply pressure.

Abstract: A wall flow monolith, for example, of circular configuration has its outer surface at the inlet end cut on tangents so as to provide four chordal flat surfaces with at least alternate channels next to these surfaces plugged at the inlet end so that exhaust flow is through these chordal surfaces into these channels whereby particulates are collected on the chordal surface. Glow plugs are positioned to ignite particulates on these chordal surfaces and, these glow plugs are energized either individually or in sets as an accumulated time function of engine operation.

Abstract: An electromagnetic unit injector for use in a diesel engine includes a housing with a pump therein defined by an externally actuated plunger reciprocable in a bushing to define therewith a pump chamber open at one end for the discharge of fuel via a discharge passage means to a spring biased, pressure actuated injection nozzle. The pump chamber is supplied with fuel from a fuel chamber, containing fuel at a suitable supply pressure, via a one-way valve controlled supply passage. The discharge passage means is also in flow communication with the fuel chamber via a primary drain passage means as controlled by a differential area valve. The differential area valve, at an enlarged diameter end thereof defines, in part, a pressure control valve that is connected by a throttle orifice passage to fuel flow in the discharge passage means and, by a secondary drain passage, having a solenoid actuated control valve therein, to the fuel chamber.

Abstract: An edge discharge pulse fuel injector for discharging fuel to the cylinder of an internal combustion engine has a housing with a bore extending axially therein receiving an orifice plate fixed in one end thereof to partly enclose that one end, with the orifice plate having a valve seat surface and an opposed outboard surface with an orifice passage extending therethrough that is located radially outward from the axis of the housing. A solenoid means is fixed in the opposite end of the housing, the solenoid means including a pole piece means with a working surface positioned at right angles to the housing axis and in axial spaced apart opposed relationship to the valve seat surface to define a fuel chamber therewith within the housing which is adapted to receive fuel.

Abstract: An internal type, spring damper for use in an internal combustion engine or the like having a cylinder head with a poppet valve supported for movement between valve open and valve closed positions and with a coiled valve return spring loosely encircling the stem of the valve and operatively associated at one end with the valve and having its bottom end operatively in abutment with the cylinder head whereby to normally bias the poppet valve to the closed position, has at least its corresponding bottom end of reduced external diameter for a predetermined axial extent whereby to eliminate damper-to-spring contact for up to at least 11/2 coils of the valve spring at its bottom end.

Abstract: A through flow exhaust particulate filter element of the type including a ceramic monolith structure having a plurality of thin interlaced gas filtering porous internal walls defining a plurality of parallel passages extending to opposite inlet and outlet ends thereof, said passages including a first group comprising inlet passages open at said inlet end of the element and closed by plugs at the outlet end and a second group comprising outlet passages closed by plugs at said inlet end and open at said outlet end, the plugs of the outlet passages at the inlet end of the element being of a ceramic porous material corresponding in porosity substantially to that of the porous internal walls whereby exhaust gases can flow therethrough so that particulates will be trapped by these porous plugs to thus permit flame travel along these plugs to adjacent inlet passages during incineration of collected particulates on the filter element.

Abstract: An exhaust cleaner system for use in the exhaust system of a diesel engine is provided with a particulate filter positioned in a trap housing with an exhaust inlet thereto and an exhaust outlet therefrom. A pair of exhaust ducts are positioned in the inlet end of the exhaust outlet whereby to define, in effect, three separate exhaust flow zones through the filter and a flow limiter valve is operatively positioned to sequentially control flow through the exhaust ducts. Glow plugs are located so as to extend into the zones of the filter associated with the exhaust ducts to initiate incineration of particulates during reduced exhaust flow conditions as controlled by the flow limiter valve.

Abstract: A lash adjuster is retained in unit assembly in a stepped socket of a valve actuator member by means of a normal flat retainer ring, preferably of compliant plastic, that is operatively positioned in an annular groove in the outer peripheral surface of the cylindrical body of the adjuster, the groove being defined by spaced apart sidewalls and an interconnecting base wall, one of the walls being at right angles to the axis of the body and the other wall being inclined at an acute angle to right angle wall whereby during insertion of the lash adjuster into operative position within the socket, the retainer ring can be forced toward the other wall so as to be temporarily deformed into a frustoconical configuration.

Abstract: An exhaust cleaner and multi-point burner system for a diesel engine has a burner device with concentric first and second sets of circumferentially spaced apart point igniters facing the inlet end face of a particulate filter to effect multiple points of ignition of the particulates collected thereon, and a central point igniter to serve as a pilot light, supplied with an air/fuel mixture by a first supply conduit and a solenoid valve controlled supply conduit, respectively. The arrangement is such that the air/fuel mixture to the sets of point igniters is ignited using a single central electric igniter, such as a spark plug to ignite the air/fuel mixture supplied to the central igniter. Once all points are ignited, the solenoid valve is closed, thus increasing the flow of the air/fuel mixture to the sets of point igniters. This change in flow reduces heat losses and minimizes air/fuel requirements to effect ignition of the particulates.

Abstract: A rocker arm assembly for use in the valve train of an internal combustion engine of the type having a fixed rocker shaft for supporting at least one rocker arm and having an axial passage adapted to be in continuous communication with the pressurized lubricant supply of the engine and with at least one radial riser passage extending from the axial passage; the rocker arm assembly including a rocker arm having a hydraulic lash adjuster operatively positioned in a socket provided in an arm thereof and, a hybrid bearing operatively positioned in the rocker arm so as to encircle the rocker shaft over the oil riser passage.

Abstract: A distributor diesel fuel injection pump of the spill-inject-spill type has a two-piece valve moveable relative to a valve seat to the spill-inject-spill cycles with this valve being actuated by the armature of a push type solenoid. At least the tip portion of the valve is made of steel, the remainder of the valve being formed of a compliant material so as to substantially reduce valve bounce and to permit sufficient bending of the valve to allow the armature to contact the pole surface of the solenoid.