CAMSHAFT ADJUSTING DEVICE AND CENTRAL VALVE FOR A CAMSHAFT ADJUSTING DEVICE
First Claim
1. A camshaft adjusting device for an internal combustion engine comprising:
- a rotor that is lockable in rotation with a camshaft of the internal combustion engine, anda pot-shaped stator that is drivable by a crankshaft and encompasses the rotor, andan annular space present between the stator and the rotor and divided into several pressure chambers by stator ribs extending up to the rotor, wherein the pressure chambers are each divided by vanes provided on the rotor into two work chambers (A,B), anda central valve with a displaceable valve body by which a pressurized medium fed out from a pressurized medium reservoir (T) via a pressurized medium pump (P) is selectively fed into the work chambers (A, B) on one side of the vane as a function of a position of the valve body and is returned from the work chambers (A, B) into the pressurized medium reservoir (T) on the other side of the vane, anda pressure limiting valve in the camshaft adjusting device that enables a return of the pressurized medium back into the pressurized medium reservoir (T) or to the pressurized medium pump (P) when a predetermined pressure in the camshaft adjusting device is exceeded.
1 Assignment
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Accused Products
Abstract
A camshaft adjusting device for an internal combustion engine including: a rotor that can be rotationally fixed to a camshaft of the internal combustion engine; a pot-shaped stator that encompasses the rotor and can be driven by a crankshaft; and an annular chamber situated between the stator and the rotor and subdivided into multiple pressure chambers by stator ribs that are located on the stator and that extend up to the rotor. Each pressure chamber is subdivided into two working chambers (A,B) by vanes provided on the rotor. The device also includes a central valve (1) which has a displaceable valve body (2), by which a pressure medium that is fed via a pressure medium pump (P) from a pressure medium reservoir (T) can be selectively introduced into the working chambers (A,B) on one side of the vanes and can be fed back from the working chambers (A,B) on the other side of the vanes to the pressure medium reservoir (T), depending on a position of the valve body (2). A pressure limiting valve (15) is provided in the camshaft adjusting device, said valve allowing the pressure medium to be fed back to the pressure medium reservoir (T), or to the pressure medium pump (P), if a predefined pressure is exceeded in the camshaft adjusting device.
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Citations
9 Claims
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1. A camshaft adjusting device for an internal combustion engine comprising:
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a rotor that is lockable in rotation with a camshaft of the internal combustion engine, and a pot-shaped stator that is drivable by a crankshaft and encompasses the rotor, and an annular space present between the stator and the rotor and divided into several pressure chambers by stator ribs extending up to the rotor, wherein the pressure chambers are each divided by vanes provided on the rotor into two work chambers (A,B), and a central valve with a displaceable valve body by which a pressurized medium fed out from a pressurized medium reservoir (T) via a pressurized medium pump (P) is selectively fed into the work chambers (A, B) on one side of the vane as a function of a position of the valve body and is returned from the work chambers (A, B) into the pressurized medium reservoir (T) on the other side of the vane, and a pressure limiting valve in the camshaft adjusting device that enables a return of the pressurized medium back into the pressurized medium reservoir (T) or to the pressurized medium pump (P) when a predetermined pressure in the camshaft adjusting device is exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A central valve for a camshaft adjusting device comprising:
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a displaceable valve body, wherein a pressurized medium fed from a pressurized medium reservoir (T) via a pressurized medium pump (P) is selectively fed into different work chambers (A, B) of the camshaft adjusting device as a function of the position of the valve body and is returnable into the pressurized medium reservoir (T), and in the central valve there is a pressure limiting valve that enables a return of the pressurized medium back into the pressurized medium reservoir (T) or to the pressurized medium pump (P) when a predetermined pressure of the pressurized medium is exceeded.
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9. (canceled)
Specification