What are the main S-RAM technical advantages for engine applications?

The S-RAM has five major technical advantages as compared to crankshaft engines and pumps:

(1) The S-RAM replaces the crankshaft assembly, thus most of the bottom-works of an engine can be eliminated.

(2) The S-RAM dramatically reduces engine friction piston/cylinder sidewall friction and overall bearing friction. The S-RAM zero side load (ZSL) joint creates a straight-line piston motion within a cylinder almost eliminating piston sidewall friction. The S-RAM has approximately 50% of the number of bearings and, ⅓ to 1/6 the bearing surface speed, resulting in an overall bearing friction that is less than 20% of that of a crankshaft engine.

(3) The S-RAM can vary piston stroke, and therefore, an engine designer can create a Variable Displacement and Compression Ratio (VCR) engine.

(4) The S-RAM changes the form factor of an engine and allows the use of an axial or barrel engine configuration providing an engine designer greater freedom. The S-RAM axial geometry creates a cylindrical package, allowing for a wide range of applications that have limited space or unique installation requirements.

(5) The S-RAM can be built with "double-ended" pistons without adding much space. The S-RAM can easily drive a mirror image rod and piston in the opposite direction 180 degrees out of phase. The performance of an engine or pump can essentially be doubled without adding much weight or size.