S-RAM: Revolutionary Power Conversion


Project Description

This video presentation depicts the advantages of the S-RAM system.

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2:30
  • Skills:

    • 3D Modeling
    • 3D Rendering
    • Animation
    • Compositing
    • Concept Design
    • Graphic Design
    • Illustration
    • Lighting
    • Storyboarding
    • Text & Titles
    • Materials & Textures
    • Tracking
    • UV-Mapping
    • Vector Graphics
    • Video Editing
    • 3DS Max/VRay, AfterEffects, , Illustrator, Manga Studio, Modo, Photoshop, PowerPoint, SketchBook Pro, UVLayout
  • Client:

    S-RAM Dynamics


How It Works

A simple form of the S-RAM is shown in the adjacent animation. The animation shows the four main components: rocker arm, universal joint, nose pin, and piston joint. A piston is attached to one arm of a 90-degree rocker arm, through a patented joint designed to allow only a force parallel to the piston axis to reach the piston. The piston runs true in the cylinder and the piston side load forces are therefore zero by definition.

A simple form of the S-RAM is shown in the adjacent animation. The animation shows the four main components: rocker arm, universal joint, nose pin, and piston joint. A piston is attached to one arm of a 90-degree rocker arm, through a patented joint designed to allow only a force parallel to the piston axis to reach the piston. The piston runs true in the cylinder and the piston side load forces are therefore zero by definition.

Ordinarily, piston side load is necessary to support the shaft torque load, but here the torque is supported by the connection to a modified universal joint (three options), which is grounded on one side and attached to the rocker arm on the other. This ground supports all of the output torque; none of it goes to piston side load. The rocker arm mounted this way cannot rotate about the shaft axis, but the nose pin can move in a circle without rotating, and the drive pin can swing back and forth in a reciprocating motion. The piston motion follows the vertical component of the nose pin motion, and ignores the horizontal component. This is the recipe for simple harmonic motion and the piston moves with nearly sinusoidal motion. The nose pin drives the crank to complete the mechanism.

This kinematic description applies to one piston, but as many pistons can be arrayed in a circle as will physically fit. Additional pistons require one additional drive arm apiece, but all share the same nose pin arm. Transfer of forces through a rocker arm is extremely efficient, works equally well in both directions and exhibits no tendency toward slip-stick behavior. Rocker arms are far more efficient than crankshaft, swash or wobble plates at transferring energy.

The S-RAM drive can be configured as a fixed or variable stroke mechanism. The stroke of the S-RAM can be varied by moving the S-RAM ZSL joint, changing the nose pin angle, or a combination of both. The animation shows both of these movements, including running the S-RAM at zero stroke.

The unique S-RAM advantages allow engine, pump or compressor designers to optimize machine performance in ways not possible by crank, swash plate, wobble plate and radial piston drives. Below are some of the key features and benefits of the S-RAM drive. Please refer to the engine, pumps, or compressor pages to learn about specific benefits.