Valve gear: Notes
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The valve gear consists of the fully variable valve lift timing (Valvetronic) and the variable camshaft timing control (double VANOS), which enables a free choice of closing time for the intake valve. Valve lift timing only takes place on the intake side; camshaft control takes place on the intake and exhaust side.
Throttle-free load control is only possible if the following variables can be controlled:
- Valve lift of the intake valve
- Camshaft adjustment of the intake and exhaust camshafts.
Result: The opening period of the intake valve is variable.
| Index | Explanation |
|---|---|
| 1 | Torsion spring |
| 2 | Eccentric shaft |
| 3 | Exhaust camshaft |
| 4 | Exhaust VANOS adjustment unit |
| 5 | Exhaust roller cam follower |
| 6 | Exhaust hydraulic valve clearance compensating element |
| 7 | Valve spring, exhaust valve |
| 8 | Exhaust valve |
| 9 | Valvetronic servomotor |
| 10 | Intake valve |
| 11 | Valve spring, intake valve |
| 12 | Intake hydraulic valve clearance compensating element |
| 13 | Intake roller cam follower |
| 14 | Intermediate lever |
| 15 | Intake camshaft |
| 16 | Intake VANOS unit |