APPARATUS AND METHOD FOR STARTING AN ENGINE USING A HYDRAULIC HYBRID DRIVETRAIN

摘要

The claimed subject matter relates to a series hydraulic hybrid driveline (1) for a vehicle, comprising: a hydraulic circuit (8) comprising a first hydraulic displacement unit (4) in fluid communication with a second hydraulic displacement unit (5), the first hydraulic displacement unit (4) having a variable hydraulic displacement and the first hydraulic displacement unit (4) being drivingly engaged with an internal combustion engine (3); a hydraulic accumulator assembly selectively fluidly connected to the hydraulic circuit (8), the hydraulic accumulator assembly comprising a high pressure hydraulic accumulator (6a) and a low pressure hydraulic accumulator (6b); and a hydraulic actuator (12) adapted to control the hydraulic displacement of the first hydraulic displacement unit (4), the hydraulic actuator (12) being in fluid communication with the hydraulic accumulator assembly and/or with the hydraulic circuit (8). The claimed subject matter further relates to a method of shutting down an engine (3) of a series hydraulic hybrid driveline (1) and of re-starting the engine (3) of a series hydraulic hybrid driveline (1) using energy stored in a hydraulic accumulator assembly.