Extra downsizing accounts for 9% efficiency increase
Downsizing is a very effective tool to increase low load engine efficiency. A downsized (smaller) engine will have less friction and less pumping losses and run at a higher, more efficient load. A downsized engine will however have less power compared to the bigger engine it replaces. The lack of power is compensated by using a turbocharger or a supercharger, but to be able to use the higher intake- and end-compression pressure the compression ratio needs to be reduced to prevent knocking problems when running at full power.
On downsized GoEngines the compression ratio is no longer a compromise
Extreme downsizing with the 2 inline GoEngine concept
Extreme downsizing can be realised in combination with a low CR, for example 8:1, but will reduce low load efficiency. With mild downsizing the CR doesn't have to be reduced so extremely, for example 10:1, but in this situation to full advantage of downsizing will not be used.
With the GoEngine Variable Compression Ratio technology extreme downsizing can be used without compromising the compression ratio.
The level of downsizing of the GoEngine is 25% higher as
with normal engines giving a 9% efficiency increase.
