Free piston double acting diesel engine

Last crawled date: 1 year, 11 months ago

https://pocharitechnologies.com/2020/01/01/worlds-only-dual-chamber-two-stroke-stoichiometric-diesel-engine/
Pochari Technologies has invented a revolutionary new type of diesel engine for use in current diesel propulsion applications with hugely improved power density and dramatically improvement emission control. The engine is a conventional piston engine where a single-cylinder serves as two separate combustion chambers. A single-piston reciprocates in a two-stroke cycle providing compression in the opposing chamber each power stroke in the opposite chamber. A single-cylinder, with the same stroke length as a conventional engine, can provide the equivalent amount of power as two cylinders. By eliminating one set of connecting rods, crankshaft, piston and cylinder we can reduce engine weight significantly.
The engine is free of a camshaft, valvetrain and crankshaft, radically improving reliability.
As a two-cycle cannot provide vacuum, air must be forced in at high pressure. Electrically driven high speed 4:1 pressure ratio turbochargers are used. In a two-stroke diesel engine, the “blower” or turbo helps in removing as much exhaust as possible at the end of each power stroke and provides the pressure necessary to fill the chamber with enough oxygen.
The injection system is a conventional common rail.
The engine block is 351 high-temperature Aluminum Alloy. This invention allows for increased volumetric power density, and most importantly, a gravimetric power density increase by a factor of 170%.
This technology will be most 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 which 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. Power density is estimated to be approximately 2 hp/lb.
CR is 17:1.
No EGR and SCR is needed thanks to the stoichiometric operation enabling conventional platinum monolith TWC technology to reduce by up to NOx 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 result in little to no PM being generated.
Since emissions do not dictate the design as in the case for conventional diesel engines, we can design the engine for power density and efficiency only.
This engine will greatly exceed all modern diesel emission standards while providing efficient trouble-free service to operators. For those interested, Please contact Christophe Pochari.