Two-Stroke Reciprocating Piston Combustion Engine

A two-stroke reciprocating combustion piston engine, it is characterized that a first stroke:

• when the pistons in compression cylinder and expansion cylinder are moving from the lowest point to the top most point in the compression cylinder and expansion cylinder, the valve of the combustion chamber and the intake valve of the compression cylinder close due the gas pressure in the expansion cylinder and compression cylinder;
• when the gas pressure in compression cylinder is smaller than the spring pressure of exhaust valve, the gas will remain in the compression cylinder, and at the same time, the pistons in the compression cylinder and expansion cylinder move upward, which increase the space inside the crankcase that creates a vacuum suction that closes the exhaust valve and opens the intake exhaust valve of the crankcase;
• during this time, the gas inside the combustion chamber passes through the intake exhaust valve and pipeline of the combustion chamber, while the gas also is sucked in through the intake exhaust valve of the crankcase into the crankcase;
• at the same time, the air outside the engine body is also sucked through the intake exhaust valve of the crankcase into the crankcase;
• when the gas pressure in the compression cylinder is larger than the spring pressure of the exhaust vent of the compression cylinder, the gas pressure opens up the exhaust vent;
• at this time, the gas inside the compression cylinder enters into the combustion chamber and because now the gas pressure in the combustion chamber increases, the intake exhaust valve is closed;
• at the this time, the gas inside the expansion cylinder is compressed in the expansion chamber of the expansion cylinder;
• when the pistons in the compression cylinder and the expansion cylinder are moving close to the top most point, spray nozzle with the effect of a low pressure water pump and a high pressure water pump sprays an appropriate amount of water into the expansion chamber to allow quick cooling of the high temperature and high pressure air in the expansion chamber and other components. At the same time, when the sprayed water meet with the high temperature and high pressure air in the expansion chamber, the water is quickly vaporized and expands, and at same time, fuel nozzle with the effect of a low pressure fuel pump and a high pressure fuel pump, sprays an appropriate amount of fuel (gasoline, diesel fuel, natural gas) into the combustion chamber that mixes with the air, and an ignition system triggers the spark plugs to ignite the mixed combustible gas;
• the high temperature and high pressure air generated from burning mixed combustible gas pushes open the valve of the combustion chamber, and expands the gas in the expansion chamber;
• when the pistons in the expansion cylinder and compression cylinder have reached the top most point, the first stroking loop is completed;
• when the pistons in the expansion cylinder under the effect of high temperature and high pressure air, moves from the top most point to the lowest point, through the connecting rod, pistons drive the crankshaft to turn—or power stroking;
• when the pistons in the expansion cylinder have reached the exhaust vent of the expansion cylinder, a portion of the gas in the expansion cylinder is discharged from the expansion cylinder through the exhaust vent, the remaining gas is retained in the expansion cylinder for ready with the next stroking loop. At the same time, the gas pressure in the combustion chamber and expansion cylinder decreases, causing the intake exhaust valve of the combustion chamber to open up;
• the pistons in the expansion cylinder moves from the top most point to the lowest point—or power stroking, the pistons in the compression cylinder driven by the connecting rod and the crankshaft begins to move from the top most point to the lowest point as well;
• now the space inside the compression cylinder increases, the vacuum suction effect opens up the intake valve of the compression cylinder, this allows the air passes through the intake valve into the compression cylinder for ready with the next stroking loop;
• in addition, at the same time when pistons in the compression cylinder and expansion cylinder are moving from the top most point to the lowest point, because the space inside the crankcase decrease and the gas pressure increases, the intake exhaust valve of the crankcase is closed and the valve of the crankcase) is opened, the air inside the crankcase is discharged through the exhaust valve, and when the pistons of the expansion cylinder and compression cylinder have reached the lowest point, the second stroke is completed.