Abstract: A electrohydraulic engine valve control system in a multi-valve engine wherein multiple intake (or exhaust) valves (10) in each cylinder are hydraulically controlled by a set of hydraulic valves (64, 68). Each engine valve (10) includes a valve piston (26) subjected to fluid pressure acting on surfaces at both ends with the volume (27) at one end connected to a source of high pressure fluid (40) while a volume (25) at the other end is selectively connected to a source of high pressure fluid (40) and a source of low pressure fluid (42), and disconnected from each through action of the hydraulic valves (64, 68). Each group of corresponding engine valves (10) is linked hydraulically together and can be moved in unison. Balancing springs (80) operatively engaging each valve piston (26), to account for manufacturing tolerances and other factors, by balancing the motion of the engine valves (10) while opening and closing.

Abstract: An engine valve assembly (10) within an electrohydraulic camless valvetrain cooperates with a hydraulic system (8) having a low pressure branch (70) and a high pressure branch (68) to selectively open and close engine valve (12). Engine valve (12) is affixed to a valve piston (16) within a piston chamber (18). A volume (42) below piston (16) is connected to high pressure branch (68) and a volume (20) above piston (16) is selectively connected to the high pressure branch (68) or the low pressure branch (70) via a rotary valve (34), to effect engine valve opening and closing. A motor (60) effects the rotation of the rotary valve (34). The rotary valve (34) includes an internal hollow (92) operatively and selectively connected to windows (86 and 90) in a valve sleeve (66) to allow high pressure and low pressure fluid flow through the valve (34).

Abstract: An integrated hydraulic system for controlling an engine valve control system wherein each of the reciprocating intake and/or exhaust valves is hydraulically controlled and selectively connected to a source of high pressure fluid and a source of low pressure fluid, and a hydraulically assisted turbocharger selectively connected to a high pressure source of fluid by a solenoid valve, with the turbocharger including a nozzle jet and an impulse type turbine.

Abstract: A electrohydraulic engine valve control system in a four valve per cylinder engine wherein each of pair of intake and/or exhaust valves in each cylinder is hydraulically controlled by a separate set of solenoid valves. Each engine valve includes a piston subjected to fluid pressure acting on surfaces at both ends with the volume at one end connected to a source of high pressure fluid while a volume at the other end is selectively connected to a source of high pressure fluid and a source of low pressure fluid, and disconnected from each through action of the solenoid valves. Each pair of corresponding valves is linked hydraulically together and my be moved in unison or one may have reduced travel relative to the other via a valve deactivator, including one valve being completely deactivated. This difference in travel between the pair of valves accounts for various engine operating conditions and manufacturing tolerances.

Abstract: A variable valve assembly, engine valve control system, and method of operation wherein the valve is hydraulically controlled and includes a valve piston subjected to fluid pressure acting on surfaces at both ends of the valve piston. The cavity at one end of the valve piston is connected to a source of high pressure fluid while the cavity 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 valve assembly includes a damper to limit the velocity of the valve during a portion of the travel of the piston, particularly as the valve head lands on the valve seat.

Abstract: Several concepts/methods and apparatuses are described and illustrated for enhancing/supplementing the natural bidirectional torsional pulses produced by an engine during its operation for use as an actuating force, for example, in a self-energizing engine phaseshifter; one method consisting of adding additional cam-lobe spring pairs providing the desired retarding or advancing torque impulses; or, selectively increasing the loads for the valve train springs by providing stiffer springs and fewer or greater coils or changing the weight of the spring or, using coaxial camshafts with independent phaseshifter mechanism to permit mounting of selected ones of the cam/spring pairs on one shaft with the remaining on the other shaft, in accordance with the desired net positive/negative producing torque pulses produced by the respective pairs

Abstract: The present invention contemplates a mechanically simply constructed mechanism located internally of a piston engine for adjustably changing the stroke of a piston over a predetermined range in response to a variety of operating control parameters. The adjustable stroke changing mechanism provides an optimum compression ratio at each change in piston stroke and over the entire range of piston stroke provided which may be varied from one piston engine to another of different performance characteristics without requiring a major change in design of the stroke changing mechanism. The stroke changing mechanism includes a swing plate pivotally fixed to the engine block at one end and placed intermediate the piston connection rod and respective crankshaft pin at its other end, each of which are affixed to and translate within the swing plate as the piston is driven to reciprocate within a piston cylinder.

Abstract: A fuel injector assembly has an outer body that is fixed to the cylinder head and an inner valve that moves to a fixed open position to discharge a fuel/compressed air or gas mixture into the combustion chamber. A control sleeve surrounds the injector body and is axially movable with respect to it to various positions to interact with the spray pattern of the fuel mixture being discharged from the nozzle to vary the shape or pattern of the fuel spray as a function of different engine operating conditions.