Boots – shoes – and leggings
Patent
1994-07-01
1996-10-01
Chin, Gary
Boots, shoes, and leggings
454 70, 123 4113, G06F 1900
Patent
active
055616020
ABSTRACT:
In a tunnel control system for traction vehicles, the normal deration function is suppressed to delay deration in a tunnel. The traction vehicle is provided with a controller having a normal operation mode and a tunnel operation mode. A tunnel indicator connected to the controller provides an indication of when the vehicle is approaching a tunnel and causes the controller to switch into the tunnel operation mode. In this mode, the controller increases cooling to reduce the temperature of the vehicle's prime mover and the control electronics prior to entering the tunnel. As the traction vehicle enters the tunnel, the controller monitors the engine oil temperature and the ambient air temperature. If the ambient air temperature exceeds a predetermined value, then the cooling of the control electronics is discontinued. If the oil temperature exceeds a threshold (which is about 10.degree. C. higher than the normal deration threshold), then power to the prime mover is derated. After the vehicle exits the tunnel, the prime mover and control electronics are gradually cooled to avoid thermal shock.
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Bessler Warren F.
Griebel Ronald F.
Marsh Gregory A.
Chin Gary
General Electric Company
Ingraham Donald S.
Patnode Patrick K.
Snyder Marvin
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