Electrohydrostatic system for clutch assisted actuation
The invention regards an actuation system able to perform the disengagement of a clutch in ground vehicles with automatic gear shifting. This solution can attain elevated performance while ensuring energy consumption efficiency, reduced actuator envelope and simplicity in its layout.
This invention exploits a hydrostatic transmission driven by an electric motor to yield a controlled actuation system.
The controlled angular displacement of the electric motor (1) is transmitted to a fixed-displacement gear pump (2) through a mechanical joint (3). This action yields a volumetric displacement inside a hydraulic circuit. Therefore, this volume of fluid acts on the piston of an actuator (4) to attain linear motion.
The proposed solution can integrate a valve (5) (e.g. an on/off valve or a proportional valve) to keep the clutch in a disengaged position. A further measure to guarantee safety consists in the inclusion of a pressure-relief valve (6).
The control of this actuator can be improved using a dedicated electronic control unit (7) and a sensor for the feedback of the linear position of the hydraulic actuator (8).
- Clutches for automotive systems with automatic gear shifting;
- Clutches for industrial machinery;
- Linear positioning systems.
- High efficiency;
- Improved performance;
- Low costs;