Today's diesel engines have considerably more fuel injection pressure than diesels of the past. For example, early Stanadyne DB2 injection pumps push fuel out to the injector at 6,700 psi, while newer common-rail systems operate at five times that level. Taking note of this development, we ask:
What kind of pressures will future systems use?
Green Diesel Corp has gone all out developing its new system, which produces 160,000 psi of pressure. What's interesting is it does not have a high-pressure injection pump, instead it uses self-contained unit injectors-one per cylinder. Each injector nozzle has 120 very small holes and uses electricity and hydraulic pressure to inject the fuel using two injection pulses. The first shot is delivered in the shape of a donut at a lower pressure. The second pulse is in the shape of a donut hole and is delivered at 160,000 psi. Since fuel is delivered as a fine gas, heavy-dished pistons (found in direct injection engines) are not needed.
Standard injection pumps take between 10-40 hp to spin, according to Green Diesel Corp, so this is another area it gains efficiency. Glow plugs are also a thing of the past. Green Diesel Corp claims its injectors produce controlled combustion in the cylinder and, as a result, cylinder pressures are not as spiked-instead they are more gradual. This results in more power and durability with less emissions, fuel consumption, vibration, noise, and weight. DP
 Here is a Detroit Diesel Series...  Here is a Detroit Diesel Series 60 converted to a Green Diesel fuel injection system. Other successful conversions include a 6.6L Duramax and a GM 6.5L completed for the Pentagon. |  Here is Ron Kukler, CEO of...  Here is Ron Kukler, CEO of Green Diesel Corp, with a GM V-6 Alloytech gas engine converted to diesel with his 160,000psi injectors. | |