System and method for providing hydraulic energy-accumulation hybrid power

The invention discloses a system and a method for providing hydraulic energy-accumulation hybrid power. In the system disclosed by the invention, an engine is interacted with a hydraulic pump/motor through a special clutch for engines, and outputs power to a gearbox through an external clutch. In the process of car braking, the engine drives the hydraulic pump/motor to rotate through the special clutch so as to convert the mechanical energy of the hydraulic pump/motor into the pressure energy of a liquid medium, and stores the liquid medium with the power energy into a hydraulic energy accumulator, thereby achieving an effect of energy recovery; and in the process of car starting or accelerating, the liquid medium with the power energy impacts the hydraulic pump/motor to rotate, the hydraulic pump/motor converts the power energy into mechanical energy and outputs the mechanical energy to the engine by the special clutch, and the engine drives a car to go forward through the external clutch, thereby achieving an effect of energy regeneration. The method disclosed by the invention comprises the steps of judging the state of a car according to acquired car information and then carrying out corresponding control on the system, thereby achieving the purpose of energy recovery or regeneration.