[user removed]

Originally Posted by NeilBlanchard

The Revetec design doubles the efficiency of a crankshaft design. If some of the other major losses could be addressed, then could the efficiency go above 50%? Is 60% possible?

The major problems with most current ICE designs:

Poor geometric / mechanical torque due to the inherent limitations of the sinusoidal motion of the piston and the connecting rod's angle relative to the crankshaft (vs a rotary design or an electric motor)

No con rods cylinders maintain parallel aspect to the location points at top and bottom, sequential injection pulses to produce peak pressure at best point of leverage.

Long time periods between power strokes, requiring relatively large flywheels.

reduce cycles by 50%

Large mechanical drag from the valvetrain having to work against the springs.

No valve train

The acceleration and deceleration of the piston and connecting rods.

Eliminate it.

The brief / momentary pressure buildup of the fuel burn (vs the constant pressure reserve of a head of steam, for example)

Covered by injection fuel in several events during the combustion stroke.

The need to pump oil through tiny passageways, and to generate electricity.

Actually you can produce oil pressure with less energy than an electric hand drill, but you can reduce the engines total running time by 80% using capacitive storage and release with a IVT of some configuration.

The need to warm up to reach ideal operating temperature.

Eliminate the cylinder head.

The amount of waste heat requires a lot of "stuff" and requires a lot more aerodynamic drag to be able to dump it out of the vehicle.

Insulate everything to reatin the heat and use it to generate power for all of the accessories.

The relatively narrow torque band, requiring a multi-ratio transmission -- basically as many gears as possible. Seven or eight gears would be better than merely three to five.

Operate engine only at peak torque

The need to idle while not actually being used.

Eliminate idling.

No new technology necessary.

regards
Mech