Abstract: A modular hydraulic valve actuating assembly for use in association with a single combustion chamber in a multicylinder internal combustion engine cylinder head. The assembly includes a housing having a mounted surface to attach to the cylinder head immediately above a poppet valve. The housing includes a first cavity spaced from and oriented non-parallel to the poppet valve, a second cavity coaxially aligned with the poppet valve, and a fluid passageway extending between and hydraulically coupled to the first and second cavities. A master piston within the housing co-operates with a camshaft to define a first enclosed fluid chamber which varies in displacement as the master piston is reciprocally oscillated by the camshaft. A slave piston within the housing co-operates with the poppet valve to define a second enclosed fluid chamber hydraulically connected to the first and varying in displacement as the slave piston oscillates.

Abstract: A sonic flow, plug type carburetor has an annular fuel induction slot in the periphery of the plug connected to an air/fuel mixture supply in the plug, and fuel distribution means in the plug in the form of an air turbine located adjacent the slot and in a position to receive liquid fuel from the air/fuel mixture to centrifuge the fuel globules outwardly and thinly spread the fuel as a film uniformally around the annulus of the induction slot for a uniform entry into the air stream.

Abstract: A sonic flow, plug type carburetor has an annular fuel induction slot in the outer periphery of the plug connected to an air/fuel mixture supply in the plug, and fuel distribution means in the plug in the form of a vortex chamber located adjacent the slot and receiving liquid fuel therein to centrifuge the fuel outwardly towards the slot in a thin film uniformly around the annulus of the slot.

Abstract: A sonic flow-type carburetor having a variable area venturi defined by a conical air nozzle receiving axially within a movable matching conically-shaped plug to define a constricted annular variable area or zone between through which air flows at sonic velocity over a large portion of the operating range of the engine, the plug shape defining a diffuserless nozzle to locate the point of maximum flow velocity at the manifold edge of the plug for better atomization of the fuel and uniform distribution into the air stream for flow into the manifold, the plug having an annular fuel induction port opening into the zone and connected by conduit means to an induction-type fuel supply slot by an overlapping christmas tree-shaped slot, air also being variably supplied to the conduit means as a function of engine operation to vary the fuel induction signal and, therefore, the overall air/fuel ratio of the mixture flow to the engine.

Abstract: A motor vehicle type engine has an exhaust gas crossover passage connecting exhaust gases to the intake manifold below the carburetor and past a selectively operable, valve type sonic flow metering control that provides very accurate and reproducible measurements of the exhaust gas flow at all times, the control comprising a variable area convergent-divergent nozzle that is so designed and constructed as to provide sonic flow of the gases through the metering area over essentially the entire operating range of the engine manifold vacuum regardless of the change in metering area, thereby providing a constant flow rate for each changed area of the nozzle, with variances in the flow rate being in direct proportion to the change in metering area.

Abstract: A variable engine valve control system wherein each of the reciprocating intake and/or exhaust valves is hydraulically controlled and includes a piston subjected to fluid pressure acting on surfaces at both ends of the piston. The space at one end of the piston is connected to a source of high pressure fluid while the space at the other end is connected to a source of high pressure fluid and a source of low pressure fluid, and disconnected from each through action of controlling means such as solenoid valves. The controlling means may include a rotary hydraulic distributor coupled with each solenoid valve, thereby permitting each solenoid valve to control operation of a plurality of engine valves in succession.