Piston acceleration and deceleration rates are dramatically reduced providing increased “dwell” time for extraction of combustion energy and reduced stress and friction.

Plot of Efficient-V piston travel compared to a Ford 302:

• X axis represents crankshaft angle, Y axis is piston travel in the cylinder
• Efficient-V piston travels slower around TDC
• Combustion forces act on the piston longer
• Thereby extracting more energy from the fuel