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US 6,386,165 B1Granted
Device for adjusting the phase position of a shaft
AssigneeTrochocentric International AG
InventorsSiegfried Eisenmann, Hermann Harle
Life of this patent
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AssigneeTrochocentric International AG
InventorsSiegfried Eisenmann, Hermann Harle
Estimating the term…
The device for adjusting the phase position of a shaft, especially a camshaft that can be rotated by a drive shaft, more particularly a crankshaft, by a transmission device with at least one transmission wheel, is configured as a rotary piston machine according to the orbit principle. The inventive device adjusts the rotary position of the transmission wheel in relation to the shaft. The rotary pistol machine includes a stator with inner teeth, an annular rotary piston with outer teeth that engage with the inner teeth of the stator, a driven part that can be rotated by the rotary piston and a valve that can be rotated by the rotary piston and a valve device. In order to control the movement of the rotary piston, the valve device enables rotating partial areas of the working area between the stator and the rotary piston to be joined to a fluid supply device at high or low pressure. The fluid supply device includes a control mechanism, a phase position detector and at least one control valve. It enables a theoretical phase position to be adjusted by actuating the valve in a corresponding manner. Fluidic connection to be adjustment device occurs by two angular rotational connections.
An adjusting device (1) for adjusting the phase position of a shaft, which is a camshaft (2), which is caused to rotate by a drive shaft, which is a crankshaft, via a transmission device having at least one transmission wheel (6′) located on a shaft, the adjusting device making it possible to adjust the rotational position of the transmission wheel (6′) relative to the shaft (2) by means of hydraulic fluid which can be fed in and removed via two annular rotational connections (14a, 14b) and a fluid supply device comprising a control, a rotational position detector and at least one control valve making it possible to set a setpoint rotational position by a corresponding valve actuation, wherein the adjusting device (1) is a rotary piston machine based on the orbit principle, which comprises a stator (5) having an inner gear (5a), an annular rotary piston (4) having an outer gear (4a) engaging the inner gear of the stator (5a), a driven part (3) which can be caused to rotate by the rotary piston (4) and a valve device (8-12), which, for controlling the rotary piston movement, makes it possible to connect rotating regions of the working area (7) between stator (5) and rotary piston (4) to high or low pressure of the fluid supply device.
Dependencies are inferred from the claim text.