Very interesting.
These two points basically sum up the technology:
Quote:
- Running rich in the D-EGR cylinder produced reformate that improved the knock tolerance of the engine. Based on measurements of hydrogen in the D-EGR exhaust port, the engine was running with approximately 1% hydrogen by volume. 1% hydrogen was sufficient to stabilize combustion with 25% EGR at low engine loads.
- 25% D-EGR combustion allowed the engine BSFC to be reduced by at least 10%. The reduction was lowest at low speeds and high loads where the elevated compression ratio required spark retard and the supercharger was used. The maximum reduction was at high speeds and high loads where the elimination of enrichment improved the BSFC by over 30%.
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