SHELL ’ S CONSTRUCTION VEHICLE PERFORMANCE DRIVE
low-speed conditions , up to 10-12 percent of engine net-output needs to be invested in a fan drive . One percent less heat-emission ( engine-out ) may thus result in almost two percent fuel savings .
The next aspect is related to recovery and storage of kinetic energy , for example in short duty cycles of wheeled loaders moving forward and reverse in each cycle or swing drives in excavators turning from left to right and vice versa , accelerating and decelerating all the time . Recovery , short-term storage and immediate submission of this kinetic energy can reduce fuel consumption with doubledigit percentages .
A problem here is the absence of high voltage or electrical drive systems on board of these machines . Hydraulic energy storage is still not well-established and needs further development .
Finally , some OEMs are working on completely new transmission designs , such as power-split hydrostatic CVT for wheeled loaders that allow hybridisation , ( storage and submission of kinetic energy ), bringing the engine to its optimised operating conditions at all times .
Effect on lubricants The above challenges are respectively reflected in the field of lubricant development . Product application specialists at Shell are working both independently and collaboratively with OEMs to eradicate these where possible . Below is a list of some of the considerations our technical experts have to bear in mind when developing lubricants for construction machinery .
New transmission designs may require different lubricant technology .
‘.. OEMs are working on completely new transmission designs , such as power-split hydrostatic CVT for wheeled loaders ...’
Engine transmission
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