Abstract:
The invention relates to a hydraulic circuit provided with at least one hydraulic power machine (2, 4) connected to a low-pressure circuit (6) and to a high-pressure circuit (10) transmitting said power, wherein the machine is provided with a drain which allows internal leaks in the casing thereof to flow towards a low-pressure accumulator (8) or a vessel at atmospheric pressure, said circuit comprising an intake pipe (30) connecting the low-pressure circuit (6) to the casing of the machine, and an outlet pipe (36) forming the drain receiving the flow from the intake pipe in order to guide same towards the vessel (8), including a heat exchanger (42) and a filter (44) forming the fluid-treatment elements for the entire hydraulic circuit, said circuit also comprising a means for monitoring the flow (40) in the intake and outlet pipes.
Abstract:
A powertrain of a hybrid vehicle, comprising a heat engine (46) linked to a first element of a planetary gear train (30) provided with a second element linked to a hydraulic pump (44), and a third element linked to the drive wheels of the vehicle, this powertrain further comprising a hydraulic machine (2) linked to the drive wheels, characterised in that the first element of the planetary gear train (30) is linked to the heat engine (46) by a free wheel (48) allowing this engine to remain stopped when the planetary gear train is driven by the vehicle in a forward gear, said first element being further permanently linked to an alternator (50) powering the onboard network (52).
Abstract:
Hybrid vehicle comprising a first, heat engine, propulsion unit (10) and a second propulsion unit (20) that uses a different form of energy, characterized in that the vehicle comprises at least one alternator (25) coupled to the second propulsion unit (20) and connected to an electrical network (60) of the vehicle.