Woodward GECO, Technical Manual, Page: 5 / 90

Manual 03554 GECO

Stoichiometric
Woodward iii
Illustrations and Tables
Figure 2-1. System Components ............................................................................ 5
Figure 2-2. Pre-Catalyst Emissions ........................................................................ 6
Figure 2-3. Post-Catalyst Emissions ...................................................................... 6
Figure 2-4. Basic Control Logic for Pre-catalyst EGO Control ............................... 6
Figure 2-5. Basic Control Logic for Post-catalyst EGO Control ............................. 7
Figure 2-6. Control Logic with EGO3 Offset ........................................................... 7
Figure 2-7. Control Logic for Open Loop Control ................................................... 8
Figure 2-8. Control Logic for Valve-Learn Function ............................................... 9
Figure 2-9. PC Communications .......................................................................... 10
Figure 2-10. PC Software Tool Display Screen Example .................................... 10
Figure 2-11. GECO System for Single Carburetor Engine ................................... 11
Figure 2-12. GECO System for Dual Carburetor Engine ..................................... 12
Figure 3-1. Mounting Dimensions ........................................................................ 15
Figure 3-2. Circuit Board Cover (wiring legend plate) .......................................... 16
Figure 3-3. Valve Outline Drawing ....................................................................... 17
Figure 3-4. HEGO Sensor Connector Pin Arrangement ...................................... 20
Figure 4-1. Pre-Catalyst EGO Closed Loop Control Mode Diagram ................... 23
Figure 4-2. Adaptive EGO Closed Loop Control Mode Diagram ......................... 24
Figure 4-3. Open Loop Control Mode Diagram .................................................... 25
Figure 4-4. Start Sequence Flowchart .................................................................. 26
Figure 7-1. GECO Vista HMI Screen Navigation ................................................. 46
Figure 7-2. GECO Vista HMI Splash Screen ....................................................... 46
Figure 7-3. GECO Vista Main Screen .................................................................. 47
Figure 7-4. GECO Vista V-Bank Main Screen ..................................................... 47
Figure 7-5. GECO Vista Alarm Screen ................................................................. 48
Figure 7-6. GECO Vista Trend Screen ................................................................. 48
Figure 7-7. GECO Vista Diagnostic Screen ......................................................... 49
Figure 8-1. Enclosure Outline Drawing ................................................................ 54
Figure 8-2. Wiring for Single Bank ....................................................................... 58
Figure 8-3. Wiring for Dual Bank .......................................................................... 60
Figure 8-4. Legend Plate ...................................................................................... 61
Figure 8-5. Valve Outline Drawing ....................................................................... 66
Figure 8-6. L-Series ITB Outline Drawings ........................................................... 67