Pumps – Expansible chamber type – Having additional chamber intake connection from nonpumping...
Patent
1992-01-16
1993-07-27
Bertsch, Richard A.
Pumps
Expansible chamber type
Having additional chamber intake connection from nonpumping...
417493, 417505, 123456, F04B 3910
Patent
active
052306135
ABSTRACT:
A common rail fuel system, primarily including a high-pressure fuel pump, a rail, fuel injection nozzles, and an electronic control system, is disclosed. A substantially constant fuel pressure is maintained within the rail by the fuel pump under the direction of the electronic control system. The pressurized fuel is communicated to the fuel injection nozzles, which are also under the direction of the electronic control system, thereby providing fuel at injection pressure immediately upon the actuation of the fuel injection nozzles by the electronic control system. The pump incorporates leakage fuel during each stroke without the necessity of rerouting the leakage fuel through a primary supply. This reduces the total amount of fuel pumped and improves metering accuracy.
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Hilsbos Richard L.
Straub Robert D.
Teerman Richard F.
Timmer Robert C.
Wieland Harold L.
Bertsch Richard A.
Diesel Technology Company
Freay Charles G.
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