This ratio is about 3.5 in a small fast vehicle, while it is about 7 in a slow heavy commercial vehicle.
This extra length of the connecting rod, needed to secure higher torque force, can be given up, by lending a higher torque requirement to a turbo charge method, available by the way of having a power stroke and compression performed simultaneously.
Another solution is to create another positive method for the heavy slow movement of a commercial vehicle engine, where every stroke is a power stroke in our Relative-Motion Engine, where our 2000 RPMs is equivalent to a Conventional Engine doing 4000 RPMs. This fact allows us to design higher speed engines with inherent safety before reaching allowed higher rotation limits.
Another problem with commercial vehicles is the need for bigger number and bigger size of working cylinders, needed to meet the higher loads requirements.
Turbocharging at higher compression limits available with the Relative-Motion Cylinder can cut on such need, allowing the use of much smaller engines without sacrificing torque capabilities
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