Woodward GECO, Техническое руководство, Страница: 51 / 90

Manual 03554 GECO

Stoichiometric
Woodward 43
Speed 1200 rpm
MAP 22.32 psia
EGO3 Base 0.712 volts
EGO3 Offset +0.061 volts
EGO3 Target 0.773 volts
EGO1 0.781 volts
EGO2 0.784 volts
EGO3 0.778 volts
K_CL 20 %
K_Adapt 10 %
K_Valve-Learn 10 %
Valve1 Cmd +33.00 %
Valve2 Cmd +65.00 %
Adaptive +2.10 %
Run Time 0002:15:59
Screen 4: Calibration
Speed
: Engine rpm from magnetic pickup
(MPU) or “G-lead”. (This value defaults to
1350 if the Digital In RUN signal is used).
MAP
: Intake manifold absolute pressure
in pounds per square inch.
EGO3 Base
: The primary EGO3
reference voltage value at nominal or full
power conditions. This value plus the
EGO3 Offset becomes the EGO3 Target
voltage.
EGO3 Offset
: The amount that the EGO3
Base voltage is adjusted to accommodate
better catalyst performance at off load or
off speed conditions.
EGO3 Target
: The reference voltage that
the adaptive control loop is trying to
maintain.
EGO1
: Oxygen sensor signal voltage from
the pre-catalyst EGO sensor on bank 1.
EGO2
: Oxygen sensor signal voltage from
the pre-catalyst EGO sensor on bank 2.
EGO3
: Oxygen sensor signal voltage from the post-catalyst EGO sensor.
K_CL
: The proportion gain value of the closed loop control.
K_Adapt
: The proportion gain value of the adaptive control loop.
K_Valve-Learn
: The gain value of the valve position learning function that
determines how quickly the recorded valve position value moves toward the
current value.
Valve1 Command
: The bank 1 valve position command value from the closed
loop control.
Valve2 Command
: The bank 2 valve position command value from the closed
loop control.
Adaptive
: The value of the adaptive control loop output that modifies the EGO
Base value to get the EGO1/2 Target value.
Run Time
: The time, in hours, since the last engine start.
Screen 4: Valve Learn Table
Mdot Fuel
: These values represent the operating range of the engine in terms of
fuel mass flow per liter of engine displacement. These eight values should be
evenly distributed from idle to full power. The highlighted values are the two
values between which the control is interpolating an open loop valve position
command.
EGO3 Offset
: The EGO3 Offset values that are used at each load point to adjust
the EGO3 Base voltage to accommodate better catalyst performance at off load
or off speed conditions. These values are added to the EGO Base to get the
EGO Target.
Mdot Fuel EGO3 Offset Valve-Learn %
(lbm/hr/l) (+/- volts) Bank1 Bank2
0.65 +0.050 35.2 35.2
1.10 +0.050 35.2 35.2
2.00 +0.061 35.2 35.2
3.00 +0.061 35.2 35.2
5.00 +0.030 35.2 35.2
7.00 +0.000 35.2 35.2
9.00 -0.030 35.2 35.2
11.00 -0.030 35.2 35.2