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That makes sense; Delphi is a major supplier to GM, right? I thought it was interesting that the main challenge with using gasoline in a diesel style (compression ignited) engine is to *slow down* the combustion. With higher RPM spark ignited engines, the problem often is flame spread not burning all the fuel; especially in the various nooks and crannies like on the sides of the piston just above the first ring.
I wonder if they tried something similar to the Ducati Supermono, where they found they could prevent predetonation (due to high heat and compression) by having the injector spray a *stream* of fuel (rather than a spray) that then evaporated when it hit the hot crown of the piston? This is also a counterintuitive, as is 3 separate bursts of gasoline, used in this Delphi design.
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