Three cycle engine with varying combustion chamber volume

A three cycle, internal combustion engine, comprising in combination

• a cylinder block having a number of cylinders,
• a piston reciprocal in each of said cylinders,
• a radial profiled power cam shaft provided with journals for rotatable support in said cylinder block,
• a piston connecting means defining a means operatively connecting each said piston to said power shaft to convert its reciprocating motion to rotational motion of said power shaft,
• a cylinder head means, disposed on top of said cylinder block and closing each of said cylinders to form a combustion chamber therein, said cylinder head means including charge admission port means and exhaust port means communicating with each said cylinder, and charge admission valve means to control opening and closing of said charge admission port means and exhaust valve means to control opening and closing of said exhaust port means,
• valve actuation means between said power shaft and said valve means for actuating said valve means in relation with a position of said piston, with said charge admission port means open momentarily while the piston position is in a top portion of said cylinder, and with said exhaust port means open during a greater portion of an upward stroke of said piston in said cylinder,
• a charge pre-compressor, defining a positive displacement compressor means to compress an air charge to a pre-combustion pressure, said charge pre-compressor being operatively connected to said power shaft, and including means for introducing a combustible fuel into the air charge,
• a charge transmission duct defining
• communicating ducting between said charge pre-compressor and said charge admission port means,
• a combustion chamber volume adjusting means, defining a means to vary the volume of said combustion chamber within limits,
• said positive displacement compressor cooperating with said charge transmission duct to provide a sufficient compressed charge of air whereby the mass of the charge admitted into said combustion chamber essentially varies in accordance with the volume of the combustion chamber, thereby allowing control of the engine output by controlling said combustion chamber volume adjusting means,
• an ignition means, igniting the charge in said combustion chamber immediately after said charge admission port means has closed, and wherein operation of said combustion chamber comprises three distinct cycles, a high pressure charging cycle, with the piston in the top portion of said cylinder immediately followed by an expansion cycle, carrying said piston to a bottom position in said cylinder, immediately followed by a positive exhaust expulsion cycle carrying said piston back to the top portion of its stroke in said cylinder and wherein said cylinder head means includes a static cylinder head and a telescoping head associated with each of said cylinders, each static cylinder head being disposed on a top end of one of said cylinders, and provided with a bore, coaxial with and communicating with said one cylinder, each static cylinder head containing said exhaust port means and said charge admission port means;
• each telescoping head, being reciprocal within limits, within said bore of said associated static cylinder head, each telescoping head including said charge admission valve means and said exhaust valve means, said combustion chamber volume adjusting means including a screw threaded means engageable with each of said telescoping head for controlling position of each said telescoping head within said static cylinder head relative to a top position of said piston.