Functional description
In the bottom load and engine speed range the swirl flaps are closed variably according to the operating range. In the following conditions the swirl flaps are fully open:
- Engine speed higher than 2250 1 rpm
- Fuel injection rate greater than 30 mg/stroke
The position of the swirl flaps is also corrected dependent on the ambient pressure. At ambient pressures less than 880 hPa the swirl flaps are opened further proportionally.
| Item | Explanation |
|---|---|
| 1 | Swirl flap actuator |
| 2 | Intake plenum |
| 3 | Swirl flaps |
| 4 | five-pin plug connection |
The swirl-flap actuator has an adjustment range of 110°. The adjustment time for opening or closing over the entire adjustment range is approx. 0.1 seconds.