Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2006-09-26
2006-09-26
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S299000
Reexamination Certificate
active
07111614
ABSTRACT:
A common rail single fluid fuel injection system includes fuel injectors with a single electrical actuator but the ability to produce ramp, square and split injection rate shapes. This is accomplished by including a control valve member that is operably coupled to the electrical actuator and is movable between a high pressure seat and a low pressure seat. A fuel supply passage is opened to a nozzle passage by moving an admission valve member from a closed position to an open position by relieving fuel pressure on a control surface via movement of the control valve member. In addition, a needle valve member is movable from a closed position to an open position by relieving pressure on a closing hydraulic surface associated with the needle valve, which is again accomplished via movement of the control valve member via the electrical actuator.
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Coldren Dana R.
Ibrahim Daniel R.
Caterpillar Inc.
Gimie Mahmoud
Liell & McNeil
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