HYDRAULIC CIRCUIT FOR A HYBRID VEHICLE COMPRISING A VERY HIGH PRESSURE CIRCUIT AND SAFETY MEANS IN CASE OF OVERPRESSURE

摘要

A hydraulic circuit designed for a hybrid vehicle provided with a hydraulic machine (22) and a pump (20) linked to a transmission (4) driving the wheels of the vehicle, said machine and said pump being linked together in order to allow direct exchanges of fluid that take place in a very high pressure circuit (42) not comprising a pressure accumulator, characterised in that the very high pressure circuit (42) comprises safety means (110) which, in case of overpressure, discharge the fluid to a limited pressure circuit (40) provided with a pressure accumulator (46).

主权项

1. A hydraulic circuit for a hybrid vehicle comprising:
a hydraulic pump and a pump connected to a transmission driving wheels of the hybrid vehicle, the hydraulic system and the pump being connected together to enable direct exchange of fluid which are in a high pressure circuit having no pressure accumulator wherein the high pressure circuit comprises a safety assembly which in case of overpressure discharges the fluid to a limited pressure circuit equipped with a pressure accumulator; wherein the pressure in the limited pressure circuit is between 200 and 350 bar, the pressure in the high pressure circuit is greater than 350 bars and the safety assembly comprises a rupture disk which opens to a differential pressure exceeding a threshold.