Sorry Metro! As I'm an SAE member, l'm not always sure when l'm seeing exclusive material.
This is the link l have for the Ford triple:
Downspeeding, stratified charge will be keys to Ford
Quote:
Ford’s objectives for the Advanced GTDI program are to demonstrate 25% fuel-economy improvement in a midsize sedan using a downsized, advanced gasoline turbocharged direct injection (GTDI) engine with no or limited degradation in vehicle level metrics, and to demonstrate the vehicle is capable of meeting Tier 2 Bin 2 emissions on the FTP-75 cycle.
Curtis believes a 30-40% BTE improvement in gasoline engines “is possible at moderate cost.”
Stratified charge, cooled EGR, advanced aftertreatment
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Current turbo engine's downfall is ultra rich at high loads - to protect the engine - severely deteriorates fuel economy. That's why they're looking into lean burn - more like a diesel. HCCI is the next logical step.