Loader energy storage valve

Which power source is used in a wheel loader?

When the wheel loader speed is gradually increasing and over v s, thebattery will be the dominant power source. Similarly, there is a switching torque for the electric motor namely T e s, to decide the powertrain working in cruising mode (electric motor drive alone) or mixed accelerating mode.

How do pressure relief valves reduce power consumption?

To achieve this, the pressure relief valve’s setting is adjusted according to the spool position of the proportional directional valve. The study employs simulation and testing to demonstrate that this approach leads to the optimal reduction of EHS’s overall power consumption.

What are the wheel loader parameters used in the simulation?

The wheel loader parameters used in the simulation refer to theCaterpillar compact wheel loader 920. A 60 kW PMSM is selected as the propulsion system motor, where the wheel loader's maximum cruising speed and the instant thrust force can be satisfied by the electric subsystem independently.

Can accumulator and battery be used as energy storage elements?

For regenerating the kinetic energy of the wheel loader, both the accumulator and batterycan be taken as energy storage elements. In the proposed EMS, the accumulator is taken as the prioritized element since its energy cannot be filled in other ways.

What is onboard energy storage system (ESS)?

The onboard energy storage system (ESS) is highly subject to the fuel economy and all-electric range (AER) of EVs. The energy storage devices are continuously charging and discharging based on the power demands of a vehicle and also act as catalysts to provide an energy boost. 44 Classification of ESS: