Title:
APPARATUS FOR CONTROLLING A FUEL SYSTEM OF AN INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO1999045260
Kind Code:
A3
Abstract:
A fuel system includes an electronically controllable high pressure fuel pump (22) operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber (34) having a pressure sensor (72). The fuel collection chamber feeds an electronically controllable valve (38) operable to dispense the high pressure fuel to a fuel distribution unit. A control computer (58) is provided for controlling the high pressure fuel pump and valve in response to requested fueling, engine speed and fuel pressure provided by the pressure sensor. In a first limp home mode, the system is operable to drive the fuel pump as a function of fuel pressure and commanded fueling if abnormal operation of the high pressure fuel pump is detected. In a second limp home mode, the system is operable to drive the fuel pump with a predicted fuel pump command based on the fuel command and engine speed, if abnormal operation of the pressure sensor is detected.
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Inventors:
OLSON DAVID
MUSSER KEITH L
WEST STEPHEN
RAGHUNATHAN SHYAMALA
STAVNHEIM JONATHAN A
MUSSER KEITH L
WEST STEPHEN
RAGHUNATHAN SHYAMALA
STAVNHEIM JONATHAN A
Application Number:
PCT/US1999/004557
Publication Date:
November 04, 1999
Filing Date:
March 02, 1999
Export Citation:
Assignee:
CUMMINS ENGINE CO INC (US)
International Classes:
F02M41/00; F02D41/22; F02D41/40; F02M41/02; F02M59/36; F02M63/00; (IPC1-7): F02M37/04
Foreign References:
| US5771865A | 1998-06-30 | |||
| US5678521A | 1997-10-21 | |||
| US5720262A | 1998-02-24 | |||
| US5727515A | 1998-03-17 | |||
| US5241933A | 1993-09-07 |
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