Opposed-Piston Engine

Basics

• A piston consisting of one or more cylinders each containing two opposed pistons wach, with combustion occuring in between them
• Thus these have no cylinder heads
• Thus these have less friction + heat waste/loss
• Simple Uniflow Two Stroke Pattern

Advantages

• These have no cylinder heads thus these have less friction + heat waste/loss
• Smaller Size
• Simpler Design
• High Efficiency

Disadvantages

• May need 2 Crankshafts and/or more gears

Used For

• Open Source Motor/Engine Construction Set ?

Industry Standards

• Ecomotors' Design
• Pinnacle Engines
• Achates Power
• Some Automakers

Existing Open Source Designs

Hackaday Article #1

• Part 1
• Part 2

See Also

• Free Piston Engine

Useful Links

• Wikipedia Page on Opposed-Piston Engines
• Youtube Video by "Engineering Explained" describing Opposed-Piston Engines (mainly [https://en.wikipedia.org/wiki/Achates_Power Achates Power's Design ) ]
• Achates Power's Main Website