Three-cylinder illustration of the Pinnacle Engines design, with a highlighted cycle shown in the first cylinder. Intake is in blue, ignition is yellow, and exhaust is in red.

Pinnacle Engines has taken old ideas around engine efficiency and combined them with breakthrough engineering to create something entirely new. We have developed and patented an ultra-efficient engine design based on a four-stroke, spark-ignited (SI), opposed-piston sleeve-valve architecture using conventional engine manufacturing techniques. The design is enhanced through the use of the Cleeves cycle, which Pinnacle Engines has been developing and refining since its inception. In essence, the Cleeves cycle provides Otto cycle combustion (constant volume combustion) or diesel cycle combustion (constant pressure combustion), depending on operating condition. Additional efficiency improvements can be realized by incorporating variable valve timing, our low-cost variable compression ratio mechanism, direct injection, and turbocharging.

Independently Verified Results

To date, we have over five hundred hours of successful engine testing supporting our performance. FEV, a globally recognized leader in engine development, has independently verified our engine performance. Based on simulations performed by Pinnacle Engines, the test data indicate a 30–50% improvement in drive cycle efficiency, depending on content and application. The resulting low-cost power train system will provide dramatic reductions in fuel consumption and greenhouse gas emissions, effectively meeting existing and projected global tailpipe emissions standards.

Big Gains, Low Costs

By delivering maximum efficiency gains for the lowest cost, Pinnacle Engines effectively breaks the mold when it comes to the two choices normally facing manufacturers and consumers: big improvements for big cost, or small improvements for small cost. Pinnacle Engines’ technology provides critical and substantial improvements in fuel economy and greenhouse gas emissions with very little cost increase.

Flexible, Scalable Design

Our easily scalable, inherently fuel-friendly engine architecture demonstrates significant efficiency gains across gasoline, CNG, LPG, and alcohol fuels. Our design will ease the transition to petroleum-displacing fuels (like ethanol) by providing enhanced miles per gallon compared to traditional engines.