Woodward GECO, Техническое руководство, Страница: 3 / 90

Manual 03554 GECO

Stoichiometric
Woodward i
Contents
R
EGULATORY
C
OMPLIANCE
.......................................................................
IV
E
LECTROSTATIC
D
ISCHARGE
A
WARENESS
..................................................
V
C
HAPTER
1. G
ENERAL
I
NFORMATION
........................................................... 1
Welcome! ................................................................................................................ 1
GECO  Stoichiometric System Features ................................................................. 1
Definitions of Terms and Abbreviations .................................................................. 2
GECO  Stoichiometric Control Specifications ......................................................... 3
Environmental Specifications ................................................................................. 4
Tecknocraft Trim Valve Environmental Specifications ........................................... 4
L-Series Trim Valve Environmental Specifications ................................................ 4
C
HAPTER
2. S
YSTEM
D
ESCRIPTION AND
A
PPLICATION
................................. 5
GECO™  Stoichiometric Air/Fuel Ratio Control ...................................................... 5
Pre-Catalyst Exhaust Oxygen Control .................................................................... 6
Post-Catalyst Exhaust Oxygen Control .................................................................. 6
EGO3 Offset ........................................................................................................... 7
Open Loop Control Mode ....................................................................................... 8
Valve-Learn Function ............................................................................................. 8
Fuel Valve Dithering ............................................................................................... 9
Diagnostics and Monitoring .................................................................................... 9
Communications ..................................................................................................... 9
Modbus Communication ....................................................................................... 10
System Diagram Examples .................................................................................. 11
C
HAPTER
3. S
YSTEM
C
OMPONENTS
.......................................................... 13
Circuit Board Panel Assembly .............................................................................. 13
Hand-Held Terminal ............................................................................................. 14
Enclosure .............................................................................................................. 14
Fuel Control Valve for Supplementary Applications ............................................. 16
Fuel Control Valve for Full-flow Applications ........................................................ 18
Exhaust Gas Oxygen (EGO) Sensor .................................................................... 19
Heated Exhaust Gas Oxygen (HEGO) Sensor .................................................... 19
MAP Sensor ......................................................................................................... 20
PC Service Tool Software .................................................................................... 21
Status Indicator LEDs ........................................................................................... 21
LED Wiring Diagram ............................................................................................. 22
C
HAPTER
4. C
ONTROL
O
PERATION
........................................................... 23
Closed Loop Strategy ........................................................................................... 23
Open Loop Strategy ............................................................................................. 25
Start-up Strategy .................................................................................................. 25
Modbus Communication ....................................................................................... 26
C
HAPTER
5. H
AND
-H
ELD
T
ERMINAL
O
PERATION
....................................... 28
Hand-Held Terminal Operation ............................................................................ 28
Hand-Held Navigation and Control Keys .............................................................. 28
Hand-Held Terminal Control Screens .................................................................. 29
Hand-Held Terminal Configuration Screens ......................................................... 31
Hand-Held Programmer Configuration ................................................................. 32
C
HAPTER
6. PC I
NTERFACE
S
OFTWARE
O
PERATION
.................................. 33
Introduction ........................................................................................................... 33
Screen Navigation ................................................................................................ 33
Plotting and Data Logging .................................................................................... 45