HYDRAULIC ENGINE DEVICE FOR ASSISTANCE IN THE MECHANICAL TRANSMISSION OF A VEHICLE

摘要

The invention relates to a hydraulic engine device that comprises a hydraulic engine (500) with a cylinder block (10) and a cam (20) mounted so as to be capable of relative rotation, wherein the engine further includes a fluid dispenser (60) for the cylinders having at least a portion connected in rotation to the cam (20), and a fixed dispensing connector (50, 150B) connecting the dispenser (60) to a fluid supply and exhaust, the engine including a through passage (102) along the rotation axis for receiving a segment of a transmission shaft. The engine can be declutched by radially uncoupling the pistons (12) from the cam (20), the cylinder block (10) remaining fixed relative to the vehicle reference, and the cam being rotary and connected in rotation with a segment (200) of a transmission shaft arranged in said through passage (102). The device can be used as an addition to or a replacement for the mechanical transmission of a vehicle.