electronic control

Fuel injection threw the exhaust valve would cool the valve. The preheat would make the fuel more gassious. This would aid in complete combustion. Why not electronic controlled valves. Water could be injected as well to gain more expansion of the combustion. The valves would not cop the battering of the return spring if they were returned with Maglev. Maglev could be used instead of springs. The valves could be lighter and the speeds increased.