Method and system for fuel supply to a pump-injector unit of...

Details Method and system for fuel supply to a pump-injector unit of... Method and system for fuel supply to a pump-injector unit of...

2011-03-17

2011-10-18

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Miscellaneous

Fuels, lubricants and additives

C123S522000

Reexamination Certificate

active

08037849

ABSTRACT:
A fuel supply to unit pump-injector systems of diesel engines includes a gasification and saturation of the liquid diesel fuel. A first fuel line delivers the fuel to a low pressure pump driven by an engine shaft which pumps the fuel to a common low pressure fuel manifold. There, the fuel is distributed for injection by the pump-injector units of the engine cylinders. A second fuel line delivers the fuel to a feed pump that feeds through a plurality of nozzles into a gasification vessel. The vessel is pressurized with a gas (e.g., carbon dioxide, air, etc.) a pressure level P2. There, the fuel is saturated with pressurized gas, which is dissolved in the fuel. The solution is then pumped by a second electro motor driven pump that further increases the solution pressure up to a level P3, which is higher than the pressure level P1. At that point, the solution becomes under-saturated and it is fed to the fuel manifold for injection into the engine. A feedback system for the fuel with further pressure and temperature control is provided by the system. The system, and specifically its pumps and the fill level of the gasification vessel, is controlled by a control system.

REFERENCES:
patent: 4596210 (1986-06-01), Schmidtke
patent: 5522368 (1996-06-01), Tusino
patent: 5836290 (1998-11-01), Gilbert
patent: 6273072 (2001-08-01), Knapstein et al.
patent: 7011048 (2006-03-01), Gurin et al.
patent: 7406955 (2008-08-01), Gachik et al.
patent: 7523747 (2009-04-01), Gachik et al.

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