Abstract: A valve control system for an internal combustion engine includes a housing comprising a cylinder defining a longitudinal axis, an exhaust port, a piston disposed in the cylinder and an engine valve operably connected to the piston. An exhaust member is disposed in the housing and is variably moveable along a longitudinal path to a desired position between a maximum and minimum lift position. The exhaust member has an exhaust port that is maintained in communication with the housing exhaust port as the exhaust member is selectively, variably moved between the maximum and minimum lift positions. A pressure source selectively applies a pressure to the piston and a control system is operably connected to the exhaust member and selectively, variably moves the exhaust member between the maximum and minimum position. A method for controlling the engine valve is also provided.

Abstract: Provided is a diamond-coated sliding part that is light, has excellent abrasion resistance, that prevents abrasion of the material of an opposite member, and that is effective in reducing power loss. This sliding part is especially useful as an adjusting shim for the valve train mechanism of an internal combustion engine such as an automobile engine in which the base material is silicon nitride or sialon and this base material surface is coated with a diamond coating layer. By performing finish processing on only a small part of peaks of diamond particles protruding from the surface of the diamond coating layer to reduce the height of the protrusions, or by controlling film forming conditions, etc., the profile bearing length ratio (tp) at a cutting level of 0.1 &mgr;m for the sliding surface of the diamond coating layer is made 60% or greater.

Abstract: A new design of engine valves operation system provides more accuracy in timing and increase in efficiency of engine. With the pipe structure over the engine, valves can be operated by the exhaust gases after combustion within the cylinders. After combustion, an opening near bottom limit of piston of one cylinder routes some of the exhaust gases to open gas intake valve of prior cylinder and exhaust valve of its own. This way the vested combustion energy would be in use. On the other hand, a portion of energy directly from the engine crank shaft to operate engine valves in an ordinary systems would be saved and therefore results in increase of engine performance. Since there are no need timing belt, cam shaft and pulleys in new operation system, the loss powers due to belt tightness and friction of pulleys, and cam shaft would be directed to the wheels adding more Horse Power. To start the engine, one additional intake valve and one additional exhaust valve are added to the first cylinder.

Abstract: An internal combustion engine having at least one combustion chamber in which the chamber has at least two hydraulically or pneumatically actuatable valves that are each guided in a respective valve guide. The engine includes an inlet valve for admitting fuel or a fuel-air mixture into the combustion chamber before the combustion event and an outlet valve for exhausting the combustion exhaust gases from the combustion chamber after the combustion event. In such internal combustion engines, in order to shorten the response times of the valve control, the valves are fixed relative to the valve guide by means of a respective electrically actuatable fastening element.

Abstract: An internal combustion engine with electromagnetically actuated valves comprising a variable volume combustion chamber, at least one suction duct connecting the combustion chamber with the suction manifold of the engine and at least one exhaust duct connecting the combustion chamber with the exhaust manifold of the engine, the internal combustion engine further comprising, for each suction and exhaust duct, a respective mushroom valve that can move from and to a closed position in which it closes the duct and an electromagnetic actuator adapted on command to move the valve to and from the closed position, the internal combustion engine further comprising, for at least one of the valves, a device for balancing the pressures exerted on the head of the valve and adapted to balance the pressure forces that tend to oppose the opening of this valve.