Working machine arranged with means to drive and control a hydraulic pump
AssigneeVolvo Construction Equipment AB
InventorsBo Vigholm, Andreas Ekvall
Life of this patent
Estimating the term…
Abstract
A working machine that includes an internal combustion engine, a generator, an energy storage and an electric motor for driving one or more wheels of the working machine is provided. The internal combustion engine is arranged to drive the generator and the generator is arranged to supply power to the electric motor via the energy storage. The working machine further includes an accelerator for controlling the electric motor, and a hydraulic pump for driving a hydraulic actuator. The hydraulic pump has a drive source different from the electric motor and the accelerator is arranged for controlling the speed of the hydraulic pump.
Claims18
A working machine comprising an internal combustion engine, a generator, an energy storage and an electric motor for driving one or more wheels of the working machine, the internal combustion engine being arranged to drive the generator and the generator being arranged to supply power to the electric motor via the energy storage, the working machine further comprising an accelerator for controlling the electric motor, and a hydraulic pump for driving a hydraulic actuator, wherein the hydraulic pump is directly driven by the internal combustion engine, and the accelerator is arranged for controlling the speed (if the hydraulic pump by controlling the speed off the internal combustion engine, wherein the speed control of the hydraulic pump is configured such that a greater accelerator stroke corresponds to a higher pump speed.
Dependencies are inferred from the claim text.