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in equipment designed and specified for this ISO viscosity grade. Extensive instrumentation of a range of mobile equipment allowed a big-data approach where millions of sensor readings were recorded and analysed in well-defined duty cycles. Some specific flow and pressure conditions in the hydraulic system showed double digit efficiency improvements for Lubrizol’s energy-efficient fluid. These, however, were barely relevant to any particular duty cycle so were discarded in favour of those showing a recurring demand on the machine.


In these relevant duty cycles, both the monograde and multi-grade comparative fluids showed similar performance but were easily outclassed by Lubrizol’s energy-efficient fluid.


With this fluid, a backhoe loader exhibited a 3 – 6% fuel efficiency improvement (Figure 3) depending on the duty cycle, whilst a wheel loader with fewer duty cycles showed 2.7% efficiency improvement. This advantage is not limited to mobile equipment, as exemplified by a further field trial in a large plastic injection moulding machine operated over an extended period.


Compared to an ISO VG 46 mono-grade fluid, the corresponding ISO VG 46 energy-efficient fluid reduced electricity consumption of the hydraulic system by 8.5% (Figure 4).


Fixed hydraulic equipment, often housed in temperature-controlled environments, does not require low temperature fluidity that is provided by high viscosity index multi-grade fluids.


There is, however, a clear need for reduced energy consumption on production lines, twinned with the exacting requirements for durability and reduced down-time. Thus, the benefits can be enjoyed by all hydraulic users, where energy savings entirely offset the cost of upgrading in less than two months of operation.


There is no better time to start demonstrating commitment to environmental sustainability, whilst simultaneously increasing productivity and profitability.


Figure 3: Graph showing the fuel efficiency improvement results of a backhoe loader operating a number of duty cycles when comparing the use of Lubrizol’s energy-efficient hydraulic fluid against a conventional multi-grade hydraulic fluid.


Conventional Multigrade Fluid


Lubrizol Energy Efficient Fluid Figure 2: Thermal images of an Eaton Vickers® 20VQ vane pump. The


hottest surface temperatures are indicated in red and reached 95 °C. Cooler temperatures were observed with Lubrizol’s energy-efficient hydraulic fluid.


Figure 4: Graph showing the reduced hydraulic power consumption (kW) of a plastic injection moulding machine when comparing the use of Lubrizol’s energy-efficient hydraulic fluid against a conventional mono-grade hydraulic fluid.


LINKS www.lubrizol.com


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LUBE MAGAZINE NO.158 AUGUST 2020


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