Abstract: A valve actuating assembly for actuating at least one valve is disclosed. The valve actuating assembly includes a housing assembly, an actuating assembly for actuating at least one valve during a first valve operating event and a second valve operating event, and an assembly for modifying valve motion travel of the at least one valve during at least one of the first valve operating event and the second valve operating event. A system for providing exhaust gas recirculation and compression release braking in an engine is also disclosed.

Abstract: A structure to reduce the likelihood of flashover in a parallel plate electron beam array is disclosed. The structure may comprise a spacer structure between the parallel plates along the outer perimeter of the plates. The spacer structure may include a conductive member. The conductive member may shunt anode to cathode flashovers to a sink outside of the array before they reach the cathode. The conductive member may be provided by a conductive frit made of a metal/glass mixture, a metal foil, or a metal coating that extends through or next to the spacer structure.

Abstract: Circuits for sequentially addressing memory locations in time with pulses received from a clock are disclosed. The circuits may provide a positive voltage output signal at successive output nodes associated with corresponding stages in the circuit responsive to the application of a clock signal to the circuit stages. The circuit may comprise at least first and second stages wherein said first stage comprises means for providing a positive voltage signal at a first output node in the first stage in response to application of a first positive clock pulse to the first stage, and wherein said second stage comprises means for providing a positive voltage signal at a second output node in the second stage in response to application of a second positive clock pulse to the second stage. Addressing of memory locations that contain pixel information for a video display is one particular application in which sequential addressing may be required.

Abstract: An internal combustion engine valve actuation system is disclosed. The present invention provides a hydraulic actuator for operating an engine valve, which includes a control element for controlling the seating velocity of the valve. The present invention provides for free, unrestricted movement of the valve during opening, and an unrestricted return of the valve until the valve is within a predetermined distance of the valve seat. Once within this predetermined range, the return velocity of the engine valve is limited by the rate at which a fluid may escape through a flow restriction. The restriction is calibrated to provide the desired maximum valve seating velocity.

Abstract: An engine valve actuation system is disclosed, which is capable providing compression release engine braking in combination with exhaust gas recirculation while maintaining main exhaust and main intake valve events of constant magnitude during both positive power and engine braking. The system is also capable of providing a constant level of desired overlap between main exhaust and main intake valve events during both positive power and engine braking. The system may provide the foregoing functions by using first and second valve actuation subsystems to provide the full spectrum of exhaust valve motions. Both the first and second subsystems may receive an input motion from a valve train element. The first subsystem operates only when the engine braking system is enabled. The second subsystem operates both during positive power and during engine braking.

Abstract: An exhaust brake for an internal combustion engine is disclosed. The exhaust brake includes a main valve and a bypass valve for restricting the flow of exhaust gas. The main valve may be selectively closed, while the bypass valve is biased into a closed position with a selective biasing force. Closing the main valve may cause exhaust back pressure to build against the bypass valve until the biasing force is overcome. When the biasing force is surpassed by the exhaust back pressure, the bypass valve opens to relieve the back pressure. The bypass valve closes when back pressure falls below the biasing force. The biasing force may be varied to operate the exhaust brake at a maximum back pressure for a given engine speed and/or engine condition. A method of operating the exhaust brake is also disclosed.

Abstract: In an internal combustion engine braking system which may provide compression release braking and/or exhaust braking, methods and systems are disclosed of controlling the overlap between an exhaust gas recirculation event and an intake valve event to optimize engine braking at various engine operating speeds. Optimization may be achieved by selectively advancing and retarding the opening and closing of an exhaust valve for exhaust gas recirculation. The opening and closing of the exhaust valve may be carried out responsive to the monitored levels of such engine parameters as: exhaust manifold pressure, exhaust manifold temperature, cylinder pressure, and/or cylinder temperature. Various engine parameters may be monitored. Control of exhaust gas recirculation may be responsive thereto, such that a monitored parameter does not exceed a predetermined level.

Abstract: A structure to reduce the likelihood of flashover in a parallel plate electron beam array is disclosed. The structure may comprise a means for generating a low intensity electric field in the vicinity of a spacer separating the parallel plates of the array, and the anode. The presence of the electric field in the vicinity of the spacer is not conducive to the occurrence of a surface supported flashover on the gates and emitters. The electric field means may be provided by a conductive coating on one or more surfaces of the spacer. Alternatively, the electric field means may be provided by a conductive coating on a guard ring located within the array in the vicinity of the spacer. Methods of making the structure are also disclosed.