B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
341/87
B60K 31/00 (2006.01) B60K 31/10 (2006.01) B60T 7/12 (2006.01) B60T 10/02 (2006.01) B60T 13/58 (2006.01) F16D 66/00 (2006.01)
Patent
CA 1177146
ABSTRACT In response to the actuation of a speed control lever by the vehicle operator, a potentiometer puts out a speed setting sig- nal indicative of a desired vehicle speed. A control circuit res- ponds to this speed setting signal, as well as signals represent- ative of the actual vehicle speed and of the temperature of the retarder fluid, by putting out a first braking signal, correspond- ing to the difference between the desired and actual vehicle speeds and a second braking signal corresponding to the difference between the actual acceleration of the vehicle and a preset acceleration. Under the control of the control circuit a selector normally passes the first braking signal and, when either the temperature of the retarder fluid or its temperature rise gradient exceeds a preset maximum, the second braking signal. The first or second braking signal is proportionately translated into a hydraulic pressure for actuation of a retarder. The second braking signal is intended to prevent the overheating of the retarder as when the vehicle is traveling down a long or steep slope.
393082
Kabushiki Kaisha Komatsu Seisakusho
Sim & Mcburney
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