14. February 2013

Linde Hydraulics presents innovations at bauma increasing energy efficiency and productivity considerably

  • Adaptive, electro-hydraulic load sensing system
  • Medium-pressure pump saves up to 20% fuel
  • Compact, modular monoblock valve system
  • Hydraulic start/stop system
  • State-of-the-art mobile hydraulics, hall B4, stand 314


The new generations of construction machinery being unveiled at the bauma trade fair set themselves apart thanks to their high level of performance, ease of operation and degree of energy efficiency. To a large extent, these properties are a result of the hydraulic drives installed in these machines. As a specialist in the field of mobile hydraulics enjoying many years of experience, Linde Hydraulics is using the trade fair as an opportunity to showcase new hydraulic components and systems that deliver benefits in terms of dynamics, reliability, operating comfort and productivity.

One focus of the presentation is the new LSC+ system, the benefits of which will be demonstrated at the trade fair stand using a model excavator. The LSC+ system brings together the properties of the proven Linde Synchron Control System with the additional benefits offered by the electronic control. The electronics identify the operator’s intentions and set the pump and the valves to the high dynamic or fine control range accordingly, depending on the requirement. In addition to automatically detecting the working situation, the LSC+ enables modes to be selected manually via the operator display. The conventional load-sensing control, which operates on top of this function, means that sensors are not required, not only guaranteeing more efficient and more dynamic operation of hydraulic functions, but also ensuring a long service life in tough work on construction sites.

The monoblock valve system is another new product that was specially developed for the LSC; this monoblock system integrates all key hydraulic control functions within a single cast housing. When developing this system, the proven design principle of the VT modular series was adopted: Optimized flow paths ensure the minimization of pressure losses. Additional functions can easily be added by valves in sandwich design. By adopting this approach, the construction machine manufacturer reduces the risk of leaks, saves on space and simplifies the process for assembling the hydraulics.

When it comes to being energy efficient, the electrically-controlled MPR 50 medium-pressure axial-piston pump plays a key role. The high suction speeds that this pump delivers – up to 3000 rpm – enables it to achieve a high output per litre. The compact pump is already proving its worth in new machine generations , and is primarily used in conjunction with high-pressure pumps of the 02 series. Practical tests have shown fuel savings of 11–20% being achieved with this technology compared to conventional hydrostatic drives fitted with gear pumps.

Linde Hydraulics is also unveiling another energy-saving function for the first time at bauma in the form of an hydraulic start/stop system that could be used in wheeled loaders, telehandlers and other construction machines. A compact hydraulic accumulator is charged via the MPR 50 medium-pressure pump. When the electronic LINC controller from Linde Hydraulics detects a defined standstill in driving functions, the combustion engine is shut off. As soon as the operator depresses the pedal or moves the steering wheel or joystick, the pump starts up and is fed by the charged accumulator while the diesel engine ramps up to the pre-set engine speed. This starting procedure is four times quicker than starting using an electric starter motor, ensuring the machine is immediately ready for operation. The intelligent automated start/stop system not only saves energy, but also reduces the amount of noise the mobile work machine produces.

What’s more, Linde Hydraulics is also using a number of practical examples to demonstrate how hydraulic and electrical drives can boost the energy efficiency and productivity of construction machines.