Functional description
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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.