|
...agreed, but those higher CR numbers are typically the benefit of using direct injection (into the cylinder) instead of normal manifold injection.
...the direct injection both cools the cylinder and allows it to ingest 100% air--rather than the typical less dense A/F-mixture--during the intake stroke. This permits the use of higher CR because the fuel is NOT present during the compression portion of the intake stroke, and is only present at the instant combustion is appropriate to occur (assuming properly 'timed' injection/ignition calculations).
|