Caterpillar opts for hydraulic over electric with new excavator

02/12/2013 | Fast Company online

Hydraulic proved superior to electric as the answer for Caterpillar's latest hydraulic-hybrid excavator. Besides simplicity and lower cost, considerable energy savings are possible with hydraulics as the arm swings between two points, according to this article. Some of the energy that would be lost can be captured as pressure in an accumulator and used to aid the swinging arm.

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