B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
B60K 28/16 (2006.01) B60K 17/356 (2006.01) B60K 23/08 (2006.01)
Patent
CA 2095353
An electronic control (31) is provided for a vehicle (10) having an engine (12), a main drive (14) driven by the engine (12), a fluid pump (36) driven by the engine (12) for providing pressurized fluid, and a supplemental drive driven (30) by the pressurized fluid. The electronic control (31) includes a main drive sensor (54) for sensing the speed of the main drive (14) and responsively producing a main drive speed signal. A vehicle speed sensor (64) senses the speed of the vehicle (10) relative to the ground and produces a vehicle ground speed signal. A pressure sensor (74) senses the pressure of the pressurized fluid supplied to the supplemental drive (30) by the pump (36) and responsively produces an actual pressure signal. A processor (52) receives the main drive speed, vehicle ground speed, and actual pressure signals, produces a slip ratio signal responsive to a ratio of the main drive speed and vehicle ground speed signals, produces a desired pressure signal responsive to the slip ratio signal, produces an error signal responsive to a difference between the desired and actual pressure signals, and controls the fluid pressure in the supplemental drive (30) in response to the error signal.
Olson Stephen R.
Tate William J.
Caterpillar Inc.
Kirby Eades Gale Baker
LandOfFree
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