B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
341/87
B60T 13/68 (2006.01) B60T 8/00 (2006.01) B60T 8/32 (2006.01) B60T 8/36 (2006.01) B60T 13/58 (2006.01) B60T 13/66 (2006.01) B60T 17/22 (2006.01)
Patent
CA 1166333
ELECTRONICALLY ACTUATED BRAKE SYSTEM ABSTRACT A pulse width modulated control signal is applied to inlet and outlet solenoid valves in a closed fluid vehicle brake system. The electronic actuating circuitry can control a fluid brake system in a towed vehicle from a towing vehicle without fluid connections therebetween. The closed fluid brake system provides an electrical feedback signal that tracks an electrical command signal applied by the towing vehicle operator through a manually operated command signal transducer to produce an error signal to maintain a command pressure in the towed vehicle fluid brake system. The inlet and outlet valves are repeatedly opened and closed in accordance with the width of a train of pulses. The pulse width is proportional to the difference between an electrical command signal and an error signal. -1-
384474
Rettich Thomas A.
Woodworth Raymond D.
Fetherstonhaugh & Co.
Minnesota Automotive Inc.
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