Powerboost hub

摘要

The invention relates to a series hydraulic hybrid system (1) for a vehicle, comprising: a hydraulic circuit (9) comprising a first hydraulic displacement unit (2) in fluid communication with a second hydraulic displacement unit (3); and a high pressure hydraulic accumulator (10) in fluid communication with the hydraulic circuit (9) and a low pressure hydraulic accumulator (11) in fluid communication with the hydraulic circuit (9); wherein the high pressure hydraulic accumulator (10) is in fluid communication with the hydraulic circuit (9) through a proportional flow control valve (500), the proportional flow control valve (500) being adapted to continuously vary a flow of hydraulic fluid between the high pressure hydraulic accumulator (10) and the hydraulic circuit (9).