Automatic tunnel detector for a self-propelled traction vehicle

Details Automatic tunnel detector for a self-propelled traction vehicle Automatic tunnel detector for a self-propelled traction vehicle

1985-03-21

1987-10-06

Lall, Parshotam S.

Boots, shoes, and leggings

123198D, 123198DB, 36443101, G06F 1504

Patent

active

046987614

ABSTRACT:
The propulsion control system of a diesel-electric locomotive includes means responsive to the respective temperatures of the coolant and the lubricant of the locomotive engine for automatically indicating that the locomotive is in a tunnel if the coolant temperature exceeds an abnormally high magnitude and is higher than a variable reference level that depends on the lubricant temperature. When a tunnel is thus detected, the conventional overtemperature-responsive deration function of the propulsion control system is temporarily suppressed until the coolant temperature rises to a threshold that is higher than the preset overtemperature threshold at which deration is normally initiated.

REFERENCES:
patent: 3738346 (1973-06-01), Goodman
patent: 3851469 (1974-12-01), Eichler et al.
patent: 4413595 (1983-11-01), Potts, Jr.
patent: 4485781 (1984-12-01), Barnes
patent: 4512307 (1985-04-01), Igashira et al.

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