Monitor for hydraulic transmission

Details Monitor for hydraulic transmission Monitor for hydraulic transmission

1982-05-17

1984-12-18

Crosland, Donnie L.

Communications: electrical

Selective

Having indication or alarm

340 52R, 340 60, 340501, 340588, 340591, 340611, 340626, 340670, 340679, 180179, 180282, B60Q 100, G08B 2300

Patent

active

044893051

ABSTRACT:
A vehicle, such as an agricultural tractor, includes a hydraulic assist-type transmission with fluid control and lubricating circuits. A monitoring system senses the fluid pressure in the lubricating circuit, the hydraulic fluid temperature and the engine speed. The sensed pressure is compared to a temperature and engine speed-compensated alarm value. Alarm signals are generated when the sensed pressure is continuously below the alarm value for a certain period. The alarm is disabled when the engine speed falls below a non-zero threshold level.

REFERENCES:
patent: 3893108 (1975-07-01), McBride, Jr. et al.
patent: 3906437 (1975-09-01), Brandwein et al.
patent: 3927390 (1975-12-01), Hill
patent: 3944969 (1976-03-01), Arai et al.
patent: 4184146 (1980-01-01), Fratzke et al.
patent: 4216524 (1980-08-01), Leveraus
patent: 4328480 (1982-05-01), Keitel et al.
patent: 4348653 (1982-09-01), Tsuzuki et al.
patent: 4359716 (1982-11-01), Miyamaru et al.

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