Electric hydraulic hybrid drive power steering system and a control method

The present invention discloses a hybrid electric driven hydraulic power steering system and a control method are provided in parallel between the tanks and the power steering hydraulic steering system main unit and an auxiliary hydraulic unit, a main hydraulic unit main check is provided between the valve and the auxiliary hydraulic unit of the auxiliary tee-way valve, three-way two ports are connected to a main check valve and an auxiliary check valve, a three-way oil outlet of the oil into the power steering series path between the oil port relief valve; a main hydraulic unit further includes a main controller for measuring the flow rate of the main hydraulic pump size, the auxiliary hydraulic unit further includes a main controller connected for controlling the main hydraulic pump auxiliary controller output size of the flow. The steering system and a control method where the main pump output flow to auxiliary hydraulic pump output flow rate adjusted in real time, so that the booster can be a good balance between the two hydraulic units, to prevent the waste of energy.