Hydraulic circuit for hybrid vehicle comprising a very high pressure circuit and safety means in case of overpressure

摘要

Hydraulic circuit foreseen for a hybrid vehicle that has a hydraulic machine (22) and a pump (20) linked to a transmission (4) that drives the wheels of the vehicle, this machine and this pump being linked together in order to allow exchanges direct fluid flows that are made in a very high pressure circuit (42) that does not include a pressure accumulator, in which the very high pressure circuit (42) comprises safety means (110, 140, 160) that in case of overpressure evacuate the fluid to a limited pressure circuit (40) equipped with a pressure accumulator (46), characterized in that the pressure in the limited pressure circuit (40) is between 200 bars and 350 bars, the pressure in the Very high pressure circuit (42) is greater than 350 bars and the safety means comprise a rupture disk (110) that opens for a pressure differential that exceeds a limit.