System and method of reciprocating piston engine, multi-fuel piston engine

An opposed piston engine system, comprising:

• a first cylinder and a second cylinder, each defining an interior space therein, wherein the second cylinder is an inverted version of the first cylinder and is installed in an opposed position of the first cylinder,
• the first cylinder encloses a first compression chamber, a first piston configured to fit horizontally and sealingly in the first cylinder and move vertically therewithin, the second cylinder encloses a second compression chamber, a second piston configured to fit horizontally and sealingly in the second cylinder and move vertically therewithin, the first piston and the second piston are installed in an opposed position, wherein the first cylinder and second cylinder share a combustion chamber, wherein the upper face of the first piston defines the bottom end of the combustion chamber and the lower face of the first piston defines the top end of the first compression chamber, wherein the lower face of the second piston defines the top end of the combustion chamber and the upper face of the second piston defines the bottom end of the second compression chamber,
• the combustion chamber comprises an inlet valve connected to an output pipe of an air storage tank,
• the first compression chamber comprises a first outlet valve to an input pipe of the air storage tank and a first intake valve connected to fresh air,
• the second compression chamber comprises a second outlet valve to the input pipe of the air storage tank and a second intake valve connected to fresh air,
• a controller connected to a fuel tank, wherein according to the type of fuel in the fuel tank, the controller determines the required air pressures of the first and second compression chambers via the first and the second intake valves,
• a first extension rod connected to the lower face of the first piston and extends through an aperture at the bottom of the first cylinder, the first extension rod is connected to a first crankshaft via a first connection rod,
• a second extension rod connected to the upper face of the second piston and extends through an aperture at the top of the second cylinder, the second extension rod is connected to a second crankshaft via a second connection rod,
• wherein fuel is pumped into the combustion chamber from the fuel tank and air is compressed as pressured air and injected into the first and second compression chambers by its own pressure from the air storage tank,
• wherein combustion expansion and air compression are completed in a same stroke of the first piston, combustion expansion and air compression are completed in a same stroke of the second piston,
• wherein gas contained in the combustion chamber is discharged when the first piston and the second piston move from their bottom dead centers to their top dead centers, and
• wherein clearance volume of the combustion chamber is obtainable at less than 1/50 of the combustion chamber displacement volume, clearance volumes of the first and the second compression chambers are obtainable at less than 1/50 of the first and the second compression chambers displacement volumes respectively, or both.

An opposed piston engine system with phase shift in time and offset in position, comprising:

• a first cylinder and a second cylinder, each defining an interior space therein, wherein the second cylinder is an inverted version of the first cylinder and is installed in an opposed position of the first cylinder,
• the first cylinder encloses a first compression chamber, a first piston configured to fit horizontally and sealingly in the first cylinder and move vertically therewithin, the second cylinder encloses a second compression chamber, a second piston configured to fit horizontally and sealingly in the second cylinder and move vertically therewithin, the first piston and the second piston are installed in an opposed position, wherein the first cylinder and second cylinder share a combustion chamber, wherein the upper face of the first piston defines the bottom end of the combustion chamber and the lower face of the first piston defines the top end of the first compression chamber, wherein the lower face of the second piston defines the top end of the combustion chamber and the upper face of the second piston defines the bottom end of the second compression chamber,
• the combustion chamber comprises an inlet valve connected to an output pipe of an air storage tank,
• the first compression chamber comprises a first outlet valve to an input pipe of the air storage tank and a first intake valve connected to fresh air,
• the second compression chamber comprises a second outlet valve to the input pipe of the air storage tank and a second intake valve connected to fresh air,
• a controller connected to an fuel tank, wherein according to the type of fuel in the fuel tank, the controller determines the required air pressures of the first and second compression chambers via the first and the second intake valves,
• a first extension rod connected to the lower face of the first piston and extends through an aperture at the bottom of the first cylinder, the first extension rod is connected to a first crankshaft via a first connecting rod,
• a second extension rod connected to the upper face of the second piston and extends through an aperture at the top of the second cylinder, the second extension rod is connected to a second crankshaft via a second connection rod,
• wherein fuel is pumped into the combustion chamber from the fuel tank and air is compressed as pressured air and injected into the first and second compression chambers by its own pressure from the air storage tank,
• wherein combustion expansion and air compression are completed in a same stroke of the first piston, combustion expansion and air compression are completed in a same stroke of the second piston,
• wherein gas contained in the combustion chamber is discharged when the first piston and the second piston move from their bottom dead centers to their top dead centers,
• wherein clearance volume of the combustion chamber is obtainable at less than 1/50 of the combustion chamber displacement volume, clearance volumes of the first and the second compression chambers are obtainable at less than 1/50 of the first and second compression chambers displacement volumes respectively, or both,
• wherein there is a phase shift in time between movement sequence of the first piston and the second piston, the first piston and the second piston reach their respective top dead center positions at different moments of time,
• wherein the first piston and the second piston have an offset with respect to their respective physical middle position, and push the respective top dead centre positions of the first piston and the second piston into the range of swept volume of each other,
• wherein combustion occurs in the combustion chamber and air compressions occur in the first and the second compression chambers,
• wherein tangential forces produced by a same combustion on the first crankshaft and the second crankshaft are different at any given moment before the position of Tmax of the first piston, and
• wherein at moment of ignition, positions of the first piston and the second piston are different in their respective crank angles.