The new reach stacker, 4531 TB5 HL T, promises fuel consumption and emissions with at least 30 per cent while offering improved performance.
KONECRANES has recently announced the introduction of the world's first hybrid reach stacker, the SMV 4531 TB5 HLT for container handling, with a lifting capacity of 45 tonne. It features a hybrid diesel/ electric driveline, electrified hydraulic lifting system, and a super capacitor based energy storage.
"Konecranes is a pioneer and leader in lifting technology and service. Our new hybrid reach stacker is an exciting step forward for our industry and further proofs that Konecranes is committed to offering its customers eco-efficient products and services," said Lars Fredin, Vice- President and Head of Business Unit Lift Trucks, Konecranes.
The new Konecranes hybrid reach stacker will offer customers substantial cost and environmental benefits. Estimated fuel consumption at normal handling of fully loaded containers will be at least 30 per cent lower than for equivalent diesel powered reach stackers. This is achieved by electrifying all flows of energy across the driveline, the hydraulic lifting system and the energy storage system.
"Propulsion and lifting are powered by dedicated electric motors that all can operate in regenerative modes. The energy energy generated from braking and load lowering is recovered and stored for later reuse. This results in a substantial reduction in diesel fuel consumption and environmental impact. Meanwhile, productivity is increased in terms of quicker response and higher acceleration," said Anders Nilsson, Technical Director, Konecranes Lift Trucks.
Electrification of driveline
In the new Konecranes hybrid reach stacker, the driveline is a serial configured diesel/electric system consisting of a diesel engine, an electrical generator and an electrical traction motor. The diesel engine runs at constant RPM for optimum fuel efficiency and powers the generator. Propulsion is provided by an electric motor that is an integral part of the drive axle. This motor also generates electrical energy when braking, minimising the need for mechanical braking and saving energy.
Electrification of hydraulic lifting system: In the new Konecranes hybrid reach stacker, the hydraulic pumps are electrically driven and electronically controlled. Dedicated electric motors drive the pumps that provide the hydraulic energy for lifting and steering. The speed of these pumps can be controlled independently of diesel engine speed. More importantly, the return flow from the hydraulic cylinders is not converted into heat, but fed backwards through the pumps which now act as hydraulic motors, thus regenerating electrical energy.
Electrical energy storage: A traditional reach stacker has conventional batteries for starting the engine and powering the electrical systems including lights. The new Konecranes hybrid reach stacker has a super capacitor system for energy storage that is connected to the truck's electrics.