Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2009-08-04
2010-12-28
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S457000, C123S458000
Reexamination Certificate
active
07856961
ABSTRACT:
A method for automatically controlling the pressure of a common rail system on an A side and a common rail system on a B side of a V-type internal combustion engine, in which the rail pressure (pCR(A)) of the common rail system on the A side is automatically controlled by an A-side closed-loop pressure control system, and the rail pressure (pCR(B)) of the common rail system on the B side is automatically controlled by a B-side closed-loop pressure control system. The automatic control of each side is independent of the other. A common set rail pressure is set as a reference input for both closed-loop pressure control systems. A set injection quantity is computed by a speed controller as a function of an actual speed relative to a set speed, and a common disturbance variable is computed as a function of the set injection quantity. Both the correcting variable of the A-side pressure controller and the correcting variable of the B-side pressure controller are corrected by the common disturbance variable.
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Doelker Armin
Prothmann Michael
Cronin Stephen K
Lucas & Mercanti LLP
MTU Friedrichshafen GmbH
Najmuddin Raza
Stoffel Klaus P.
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