Free piston double acting diesel engine

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Pochari Technologies has pioneered a groundbreaking new type of diesel engine designed for use in current diesel propulsion applications, boasting significantly improved power density and dramatically enhanced emission control. The engine is a conventional piston engine where one cylinder serves as two separate combustion chambers. A single-piston reciprocates in a two-stroke cycle, providing compression in the opposing chamber with each power stroke in the opposite chamber. This configuration allows a single-cylinder to provide the equivalent amount of power as two cylinders, while eliminating one set of connecting rods, crankshaft, piston, and cylinder significantly reduces engine weight. The engine is free from a camshaft, valvetrain, and crankshaft, radically improving reliability. As a two-cycle cannot provide vacuum, air must be forced in at high pressure using electrically driven high-speed 4:1 pressure ratio turbochargers. In a two-stroke diesel engine, the "blower" or turbocharger helps remove as much exhaust as possible at the end of each power stroke and provides the necessary pressure to fill the chamber with sufficient oxygen. The injection system is a conventional common rail, while the engine block is constructed from 351 high-temperature Aluminum Alloy. This invention enables increased volumetric power density and most importantly, a gravimetric power density increase by a factor of 170%. This technology will be particularly attractive for weight and volume-sensitive applications, such as marine propulsion. As the engine is a "free piston," rather than using a hydraulic piston, a permanent magnet motor linear generator is used to directly power electric motors that can be connected to each drive axle, eliminating the transmission and providing instant torque at low speed. The lubrication system is proprietary but provides greatly enhanced lubrication over conventional crankcase-fed cylinder lubrication as oil is injected directly underneath the oil ring through multiple small orifices at a constant rate and pressure. Targeted BSFC is below 0.35 lbs/hp/hr, with power density estimated to be approximately 2 hp/lb. CR is 17:1, and no EGR and SCR are needed thanks to stoichiometric operation, enabling conventional platinum monolith TWC technology to reduce NOx by up to 99.95% with the addition of a small amount of hydrogen gas as a reducing agent. The use of synthetic fuel eliminates the need for a DPF since the absence of sulfur and nitrates in the synthetic natural gas-based fuel results in little to no PM being generated. Since emissions do not dictate the design, we can design the engine solely for power density and efficiency. This engine will far exceed all modern diesel emission standards while providing efficient trouble-free service to operators.