E.G.R. SYSTEM
EF & EC-719prose procedureOperation tables differ between CD17 and CD20 engines.
Schematic
Refer to QUICK-GLOW SYSTEM.
Wiring Diagram
Refer to QUICK-GLOW SYSTEM.
Description
The E.G.R. system is designed to control the formation of NOx emission by recirculating the exhaust gas into the intake manifold passage through the E.G.R. control valve.
Operation
CD17
CD17 E.G.R. operation
Below 70 (158)
LoadAll
E.G.R. control solenoid valveOFF (Closed)
E.G.R. control valveClosed
Above 70 (158)
LoadLight load
E.G.R. control solenoid valveON (Open)
E.G.R. control valveOpen
Above 70 (158)
LoadMiddle load
E.G.R. control solenoid valveON (Open)
E.G.R. control valveOpen
Above 70 (158)
LoadHeavy load
E.G.R. control solenoid valveOFF (Closed)
E.G.R. control valveClosed
CD20
CD20 E.G.R. operation
Below 60 (140)
LoadAll
Control solenoid valve - E.G.R. valveOFF (Closed)
Control solenoid valve - Throttle valveOFF (Closed)
E.G.R. control valveClosed
Throttle chamber control valveOpen
Amount of E.G.R. gas—
Above 60 (140)
LoadLow load
Control solenoid valve - E.G.R. valveON (Open)
Control solenoid valve - Throttle valveON (Open)
E.G.R. control valveOpen
Throttle chamber control valveClosed
Amount of E.G.R. gasHigh
Above 60 (140)
LoadMiddle load
Control solenoid valve - E.G.R. valveON (Open)
Control solenoid valve - Throttle valveOFF (Closed)
E.G.R. control valveOpen
Throttle chamber control valveOpen
Amount of E.G.R. gasLow
Above 60 (140)
LoadHigh load
Control solenoid valve - E.G.R. valveOFF (Closed)
Control solenoid valve - Throttle valveOFF (Closed)
E.G.R. control valveClosed
Throttle chamber control valveOpen
Amount of E.G.R. gas—
See also
QUICK-GLOW SYSTEM