Using a toy spirograph with a 2 to 1 gear ratio. A long stroke (large diameter) followed by a short stroke. (small diameter). Intersect point is top dead center. "Revolutionary yet Simple"
Sowda® provides the patent rights for the Sowda mechanism
Building a 2-cylinder, 4-cycle, 0.67/1.0 liter engine for testing using only one set of planetaries .
Stay tuned for details.
Hopefully ARPE-e with come through with the funding. Is ARPE-e still only funding EVs?
The Sowda® Engine mechanism provides one of the most fuel-efficient engine in the world. The high efficiency is accomplished by providing a continuously Variable Compression Ratio (cVCR) applicable to both 2-cycle and 4-cycle engines and up to 50% true-Atkinson (TA), applicable only to the 4-cycle engines.
With the continuously Variable Compression Ratio (cVCR), the engine can automatically adjust the top dead center height of the piston so as to maintain a constant pressure ignition (CPI). Emissions are dramatically reduced.
Additionally, the true-Atkinson (TA) 4-cycle engines have two distinct stroke lengths: short intake/compression strokes and long power/exhaust strokes so as to extract maximum power. Typically, the power/exhaust strokes are 40% longer (50% maximum) than the intake/compression strokes. Exhaust temperatures are dramatically reduced as more power is extracted.
The chain outputs were used on the first prototype (shown) instead of gears to reduce the initial costs.
Make the Sowda® patent use and build licensing rights available to all automotive and industrial manufacturers and hopefully, each manufacturer will improve upon the design to the point where every new internal combustion engine in the world contains the Sowda® mechanism.
At Sowda Technology, we constructed a single-cylinder 4-stroke working prototype with 40% true-Atkinson (TA) and continuously variable compression ratio from 8:1 to 40:1
Items 2 and 3 are mirror-image planetaries.
Item 33 is the output shaft.
Item 32 is the variable compression
Item 10 is the sun gear
Item 5 is the primary planet gear
Item 6 are the secondary planet gears (2)
Item 9 is the internal ring gear.
The above Pressure-Volume (PV) curve shows how much work or energy is recovered by the additional combustion stroke. True Aktikson (TA) adds area (work) under the curve.
Sowda mechanism provides True-Atkinson.
Above patent drawing provides True Atkinson
(James Atkinson in 1887)
4-Stroke 3-dimensional engine prototype in progress with True-Atkinson and continuously Variable Compression Ratio (cVCR)