[Redcloak]

That's the other option that came to mind. Ditch the cam shaft and use electrically actuated valves. You could then keep the exhaust valve open during the start of the compression stroke to keep the ratio down. At the right point in the stroke, close the valve and inject the fuel. Computer controlling the valves would allow variable compression ratios depending on engine load. A computer controller would also allow better use of pressure sensors. You could know what the compression really is rather than estimating it based on engine geometry.

[John Jamieson]

Will happen soon. 42 volt power system first.

[John Jamieson]

Electronic valves will also allow a asymmetric stroke engine to skip a stroke and go from short intake long power stroke to long intake and short power stroke for accelation bursts. then back to high eff cruise.