Camshaft adjusting device
In a camshaft adjusting device for adjusting a phase position of a camshaft relative to a crankshaft of an internal combustion engine with a gear mechanism including at least three drive connections, a locking element is provided, with which at least two of the at least three drive connections, can be locked to one another in a rotationally fixed manner depending on operating conditions for retaining a particular phase position of the camshaft relative to the crankshaft of the internal combustion engine.
1. A camshaft adjusting device for adjusting a phase position of a camshaft ( 11 ) of an internal combustion engine relative to a crankshaft, comprising at least an output which is the camshaft ( 11 ), a drive input ( 12 ), a control input ( 18 ), and a gear mechanism ( 13 ) via which the output and inputs are interconnected, and a locking element ( 27 ) with which at least two of the at least three output and inputs ( 11 , 12 , 18 ) can be locked to one another in a rotationally fixed manner depending on operating conditions, the locking element ( 27 ) connecting the control input ( 18 ) of the gear mechanism ( 13 ) to the camshaft ( 11 ) in a rotationally fixed manner.
2. The camshaft adjusting device as claimed in claim 1 , including a control input ( 18 ), wherein the locking element ( 27 ) connects the control input ( 18 ) of the gear mechanism ( 13 ) to the drive input ( 12 ) in a rotationally fixed manner.
3. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) connects the drive input ( 12 ) of the camshaft ( 11 ) to the camshaft ( 11 ) in a rotationally fixed manner.
4. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is mounted to one of the output and inputs, so that it is movable into a catch ( 31 ) of the other of the output and inputs for locking the adjusting device in a latching position.
5. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is at least partially formed from a magnetic material.
6. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is at least partially formed from a permanently magnetic material.
7. The camshaft adjusting device as claimed in claim 1 , wherein a plurality of latching points ( 19 ) are provided for the locking.
8. The camshaft adjusting device as claimed in claim 7 , including a number of latching points, wherein a particular latching point ( 19 ) is selectable depending on operating conditions.
9. The camshaft adjusting device as claimed claim 1 , wherein the locking element ( 27 ) is movable radially between a locking position and an unlocking position.
10. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is movable in an axial direction between a locking position and an unlocking position.
11. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is supported so as to be pivotable about a pivot joint ( 30 ) between a locking position and an unlocking position.
12. The camshaft adjusting device as claimed in claim 1 , wherein a restoring spring ( 32 ) is provided for moving the locking element ( 27 ) from an unlocking position into a locking position.
13. The camshaft adjusting device as claimed in claim 1 including a hysteresis brake ( 20 ) for holding the locking element ( 27 ) in an unlocking position by a magnetic flux of the hysteresis brake ( 20 ).
14. The camshaft adjusting device as claimed in claim 13 , wherein a solenoid ( 35 ) is provided for actuating the locking element ( 27 ).
15. The camshaft adjusting device as claimed in claim 14 , wherein, the hysteresis brake ( 28 ) includes an annular hysteresis band ( 23 ) mounted on a rotor ( 22 ), the solenoid ( 35 ) being arranged radially outside the hysteresis band ( 23 ) of the hysteresis brake ( 20 ).
16. The camshaft adjusting device as claimed in claim 15 , wherein the solenoid ( 35 ) and the hysteresis brake ( 20 ) have a common electric power supply.
17. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is arranged in such a manner that it is moveable radially by centrifugal forces.
18. The camshaft adjusting device as claimed in claim 15 , wherein the locking element ( 27 ) is connected to a rotor ( 22 ) of a hysteresis brake ( 22 ) in a rotationally fixed manner.
19. The camshaft adjusting device as claimed in claim 1 , wherein the locking element ( 27 ) is latched in place when the internal combustion engine is switched off, thereby blocking the camshaft adjusting device.