Downsized with built in Compressor
Downsizing is a recognized way to improve fuel efficiency in engines due to lowered heat losses. To do that, you have to feed more air to the combustion prosess and this is obtained by overloading the engines by adding turbo`s or compressors. The auxiliary cylinders fill the purpose to a turbo due to utilizing the space under the auxiliary pisteon head . The exhaust pressure drives a booster compressor in the bottom of the auxiliary cylinder and this compressor will overload the engine with a pressure up to 1.8 bar. The result is a small and compact engine design which can provide high performance when needed. Without the need for a separate turbocharger.
When supercharging is needed, the expander’s regenerated energy is shared by the shaft and the compressor. However, when the load increases, the resident exhaust gas pressure from the main cylinders rise accordingly, so that even at full load, still a significant amount of recovered energy will be transferred to the engine shaft.
This method of supporting the main cylinders by pressurized charge has several advantages over the traditionally turbochargers:
• Instant response to speed and load changes. (Turbo is slow)
• Empties the main cylinders to atmosphere by discharging. (Turbo cause residual pressure in the exhaust manifold.)
• Higher level of supercharging than turbo. (Up to 1.8 bar)
• Built-in and away.
• Silent operation.
• Lower cost.