초록 ▼

A bistable electronically controlled pneumatically powered transducer for use, for example, as a valve mechanism in an internal combustion engine is disclosed. The transducer armature, an engine valve, for example, is powered by a pneumatic source and includes pneumatic damping and energy recovery a

A bistable electronically controlled pneumatically powered transducer for use, for example, as a valve mechanism in an internal combustion engine is disclosed. The transducer armature, an engine valve, for example, is powered by a pneumatic source and includes pneumatic damping and energy recovery as it nears its destination position. The armature is held in each of its extreme positions by a permanent magnet latching arrangement and is released therefrom to be pneumatically driven to the other extreme position by an electromagnetic arrangement which temporarily neutralizes the permanent magnetic field of the latching arrangement. A multiplicity of engine operating modes are also disclosed including operation of an engine in a six stroke cycle mode, and a unique intake valve timing scheme where the intake valve closure is delayed beyond bottom dead center of its associated cylinder with the delay being greater at lower engine speeds and less at higher engine speeds.

대표청구항 ▼

A bistable electronically controlled pneumatically powered transducer having an armature reciprocable between first and second positions, motive means for causing the armature to move, a permanent magnet latching arrangement for holding the armature in either one of said positions, and an electromag

A bistable electronically controlled pneumatically powered transducer having an armature reciprocable between first and second positions, motive means for causing the armature to move, a permanent magnet latching arrangement for holding the armature in either one of said positions, and an electromagnetic arrangement for temporarily neutralizing the effect of the permanent magnet latching arrangement to release the armature to move from one of said postions to the other of said positions.