One problem with existing diesel engines is the inability of the fuel mixture to mix adequately with the air for complete combustion. (A lot of trade-offs are made to achieve this.) I propose adding a heavy oil fuel into the air intake (as in a spark-ignited design). A lighter, more flammable fuel is then injected into the combustion chamber. This would be superior to a high-octane spark-ignited design because a far less flammable fuel could be used in the intake--something that may not burn reliably with a spark alone. (Nitromethane comes to mind. I never said this had to be used on the street.)
-- kevinthenerd, Mar 04 2010

how would this be better than other advancements such as direct injection? Even typical fuel injection does prety well in this regard.
-- AutoMcDonough, Mar 05 2010


Is this not the principle behind using LPG (propane) in diesels? That's baked.
-- BunsenHoneydew, Mar 19 2010


Your proposal treats fuel ignition as the only issue to solve. It isn't. A fuel should be characterized by 1 storing adequate energy by weight and volume 2 readily ignited 3 combustion occurs rapidly enough to accommodate the mechanical cycle.

Most mixed fuel proposals suffer badly in implementation on the 3rd aspect. No info is given that makes yours better.
-- MrExergy, Nov 04 2017



random, halfbakery