The invention relates to dual motor hydraulic hybrid transmission (1, 1'), comprising: a power source (2); a hydraulic circuit (3) comprising: a hydraulic pump (4) drivingly engaged or selectively drivingly engaged with the power source (2); a first hydraulic displacement unit (5) in fluid communication with the hydraulic pump (4); and a second hydraulic displacement unit (6) in fluid communication with the hydraulic pump (4); a hydraulic accumulator assembly (7) comprising a high pressure accumulator (7a) and a low pressure accumulator (7b), the hydraulic accumulator assembly (7) in fluid communication with the hydraulic circuit (3); one or more control valves (PA, PB, VHP, VLP); and an output shaft (11); wherein the first hydraulic displacement unit (5) is drivingly engaged or selectively drivingly engaged with the output shaft (11), and wherein the second hydraulic displacement unit (6) is drivingly engaged or selectively drivingly engaged with the output shaft (11); and wherein the control valves (PA, PB, VHP, VLP) are configured to selectively: fluidly connect the hydraulic pump (4) to the first hydraulic displacement unit (5) while fluidly disconnecting the hydraulic pump (4) from the second hydraulic displacement unit (6); and, simultaneously, fluidly connect the hydraulic accumulator assembly (7) to the second hydraulic displacement unit (6) while fluidly disconnecting the hydraulic accumulator assembly (7) from first hydraulic displacement unit (5).
Series parallel hydraulic hybrid architecture
12.07.2018
Patent
Elektronische Ressource
Englisch