Title:
METHOD FOR CONTROLLING PRESSURE IN PRESSURE ACCUMULATOR CHAMBER OF PRESSURE ACCUMULATION TYPE FUEL INJECTOR, AND PRESSURE CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2009/090782
Kind Code:
A1
Abstract:
A method for controlling pressure and a pressure controller, wherein the performance
for controlling the pressure in a pressure accumulator chamber is never degraded
even in the event of occurrence of disturbance by estimating the disturbance
pressure affecting the pressure accumulator chamber (common rail) that composes
a pressure accumulation type fuel injector in use for a diesel engine and the like
by means of the observer control and by correcting a pump discharge instruction
using a compensation value for compensating the estimated disturbance pressure.
The pressure controller includes a feedback control section (42) to calculate
the pump discharge instruction value of a fuel pump depending on a pressure difference
between the actual pressure in the pressure accumulator chamber that is detected
by a fuel pressure sensor (46) and the target pressure in the pressure accumulator
chamber, and a disturbance observer control section (44) that performs numerical
modeling of the pump discharge instruction value for the fuel pump, the disturbance
pressure affecting the pressure accumulator chamber, and the pressure in the
pressure accumulator chamber using a transfer function of the fuel pump, and
that estimates the disturbance pressure from the numerical model to derive the
compensation value for compensating the disturbance. The output from the feedback
control section (42) is corrected by the disturbance compensation value from
the disturbance observer control section (44).
Inventors:
OHTA YUJI (JP)
YAMADA TOMOHIDE (JP)
YAMADA TOMOHIDE (JP)
Application Number:
PCT/JP2008/068812
Publication Date:
July 23, 2009
Filing Date:
October 09, 2008
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
OHTA YUJI (JP)
YAMADA TOMOHIDE (JP)
OHTA YUJI (JP)
YAMADA TOMOHIDE (JP)
International Classes:
F02M47/00; F02D41/04; F02D41/22; F02D41/38; F02M51/00; F02M59/20
Foreign References:
| JP3944143B2 | 2007-07-11 | |||
| JP2003106208A | 2003-04-09 | |||
| JP2007092655A | 2007-04-12 | |||
| JP2007113481A | 2007-05-10 | |||
| JP2005076618A | 2005-03-24 | |||
| JP2005301764A | 2005-10-27 |
Other References:
See also references of EP 2133551A4
Attorney, Agent or Firm:
TAKAHASHI, MATSUMOTO & PARTNERS INTELLECTUAL PROPERTY CORP. et al. (Ambassador Roppongi Buildings,16-13, Roppongi 3-chome, Minato-k, Tokyo 32, JP)
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