Looking at this I'm not sure what drives the compression stroke, and have a problem with how you will keep the fireing of your pistons in synch, the crankshaft normally performs these operations.
I was referring to a you tube video I saw while researching hydrogen fueled engine. As I recall it was extremely light weight, compact and powerful .
I think that the only way to usher in new technology in the auto industry is to get the oil companies on board. Perhaps subsidizing unused oil might spark their interest. Otherwise no innovation will move forward. I see that the solutions are political . We have the tech, just look up Pogue vaporizing carburetor