Abstract:
The invention relates to a valve mechanism with a variable valve opening cross section for use in an internal combustion engine and having a gas exchange valve acted on by the force of a valve spring and displaceable axially back and forth inside a guide by a valve control unit; the position of the sealing slide relative to the gas exchange valve in the axial direction is continuously variable by means of an adjusting unit. A sealing slide disposed coaxially to the gas exchange valve, is acted upon by the force of a coupling spring, and is displaceable axially back and forth by the valve control unit. The position of the sealing slide is variable in the axial direction relative to the gas exchange valve by means of an adjusting unit.
Abstract:
A valve assembly includes a block with a chamber formed therein and a port for accessing the chamber. A fluid inlet passage and a fluid exhaust passage are formed through the block and communicate with the port. A main valve includes a head which is reciprocated into and out of engagement with a lower valve seat formed on a portion of the port. An auxiliary valve includes a head which is reciprocated through the port between a first position below the port and a second position above the port. A hollow cylindrical valve includes a central passage therethrough for fluid flow, and is disposed for reciprocating movement into and out of engagement with an upper valve seat formed on a portion of the port, the cylindrical valve closing the inlet passage when moved to the engaged position. The cylindrical valve passage is in communication with the exhaust passage throughout its movement. Apparatus is provided for sequentially moving each of the main valve, auxiliary valve, and cylindrical valve to sequentially introduce air from the inlet passage through the port and into the chamber, close the port from all fluid flow, and exhaust fluid from the chamber through the port and through the exhaust passage.
Abstract:
An extended circumference intake poppet valve system for use with a single charge carrying intake duct/port to an engine cylinder in a four cycle internal combustion engine to include three or more annular intake poppet valves (secondary valves), annular valve seats (mini ports), disposed within a primary valve head which spans said single duct/port (valve system), said valve system in fluid communication with said duct and said cylinder for opening and sealing said duct/port at said duct seat, intake valve lifting and closing means, wherein the area of the duct/port, and the matched area of the open valves are substantially equal for an extended optimum charge flow period, and in addition, valve open areas at all valve lift points during the inlet event that occur, initially and throughout extended duration through closure, are enlarged when compared with a single poppet valve servicing the same duct/port, resulting in greatly enhanced charge volume into the cylinder during the intake event.