fox1k napísal:nemiesaju ziadnu zmes paliva a vzduchu, ale na volnobehu upravuju vyrenie vzduchu (asi kvoli kulture chodu motora)

Múdro.....tu je to presne z WDS
Swirl flap control DDE 5.0
The adjustable swirl flaps are located in the tangential channels of the intake system and are opened and closed according to the operating status of the engine. The swirl flaps are closed under the following conditions:
at low engine speeds and low injection volumes (map-controlled)
The swirl flaps generally remain open when
the coolant temperature < 15°C OR
the intake air temperature < 15°C
Function
The pressure converter connects the vacuum unit with the vacuum supply by means of hoses. When activated by the DDE control unit, the changeover valve switches vacuum to the vacuum unit. The vacuum unit actuates the control rod and the swirl flaps close. The control rod is up against the rear stop when the swirl flaps are open.
Troubleshooting
If a fault is detected in the control of the pressure converter, the following faults may be detected:
4130, Activation short circuit to B+
4141, Activation short circuit to B-
4152, Activation circuit break
4153, Excess temperature output stage
Effects of faults
If the swirl flaps stick in open position: Deterioration in exhaust gas characteristics in lower speed ranges otherwise no effect.
If the swirl flaps stick in closed position: Power loss of approx. 10% at higher engine speeds.
Electrical swirl flaps DDE5.0/DDE6.3
The adjustable swirl flaps are located in the tangential channels of the intake system and are opened and closed according to the operating status of the engine. The swirl flaps are closed under the following conditions:
at low engine speeds and low injection volumes (map-controlled)
The swirl flaps generally open when
the coolant temperature < 14 °C OR
the amount of fuel > 24 mg OR
engine speed > 2250 rpm OR
the intake temperature < -5 °C.
Function
In the case of the M57 TU with exhaust emission stage EURO 4 and the M67 TU, an electric motor activates the control rod to close the swirl flaps. The control rod is up against the rear stop when the swirl flaps are open.
The swirl flaps are sealed when closed in the tangential ducts with rubber gaskets.
Effects of faults
If the swirl flaps stick in open position: Deterioration in exhaust gas characteristics in lower speed ranges otherwise no effect.
If the swirl flaps stick in closed position: Loss in power output of approx. 10 % at higher engine speeds, danger of engine overheating.