Research and Development of Ford Advanced Combustion ...
Research and Development of Ford Advanced Combustion ...
Research and Development of Ford Advanced Combustion ...
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EcoBoost Principles – Best Brake<br />
Thermal Efficiency (BTE)<br />
<strong>Research</strong> <strong>and</strong><br />
<strong>Advanced</strong> Engineering<br />
20<br />
Peak Torque<br />
GTDI<br />
Peak<br />
Power<br />
BMEP (bar)<br />
15<br />
10<br />
Baseline PFI NA<br />
GTDI Extends the<br />
High Efficiency<br />
region as well as<br />
the torque curve<br />
5<br />
FTP<br />
• Boosting exp<strong>and</strong>s the good BTE isl<strong>and</strong><br />
• Downsizing shifts it to area <strong>of</strong> higher utilization<br />
0<br />
0 1000 2000 3000 4000 5000 6000<br />
Speed (rpm)<br />
• FTP Drive Cycle typically centered about the ~25% load point for NA engines.<br />
• For a naturally aspirated engine best BTE is typically about 80% load.<br />
• GTDI greatly exp<strong>and</strong>s the best BTE isl<strong>and</strong>.<br />
• Downsizing will move the GTDI best BTE isl<strong>and</strong> to a useable range.
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