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78
ELECTRIC/ELECTRONIC SYSTEM
540760
Throttle valve assembly
Figure 61
1. Throttle valve - 2. Electrical actuator - 3. Throttle position signal - 4. Earth - 5. Positive - 6. PWM signal
Figure 62
Air from intercooler
Cooled exhaust gasses
Engine coolant
Hot exhaust gasses
A. Inlet exhaust gasses - B. Cooled exhaust gasses - C. Coolant to heater -
D. Exhaust gasses from E.G.R. valve - E. Coolant coming in from cylinder head - F. Air from intercooler
The assembly of (normally open) throttle valve is mounted on inlet manifold. Its task is to regulate the flow rate of air coming
in from the intercooler that is to be mixed with exhaust gasses recirculated by E.G.R. valve according to a programmed
percentage.
The throttle valve is driven by an electrical actuator controlled by a PWM signal from central unit EDC 16.
Base - March 2006
D
E
4
AILY
URO
108399
105063
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