Hydraulic fuel injection system with independently operable...

Details Hydraulic fuel injection system with independently operable... Hydraulic fuel injection system with independently operable...

2005-10-04

2005-10-04

Kwon, John T. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C239S585100, C239S533200

Reexamination Certificate

active

06951204

ABSTRACT:
A common rail fuel injection system addresses three basic issues involving all common rail fuel injection systems. These include high performance, low variability and high efficiency. These issues are addressed by combining pressure intensification with a three way needle control valve, which exhibits substantial leakage only durring a brief instant when the valve is moving between seats. A quick acting needle control valve tightly coupled to a responsive direct control needle valve, as modified by relative timing with a flow control valve, can produce a wide variety of fuel injection rate shapes, including up to five or more discrete injections per engine cycle.

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