Fluid level control system

Details Fluid level control system Fluid level control system

1984-01-23

1985-07-16

Brown, David H.

Lubrication

Lubricators

Constant level

74467, 74710, 184 612, F16H 144, F01M 108

Patent

active

045290610

ABSTRACT:
A fluid level control system is disclosed which uses pressurized air from a turbocharged engine to regulate the level of fluid in an axle assembly and for returning excess fluid from the axle assembly to a transmission case. The system includes a fluid supply line and a fluid return line connecting the transmission case to the axle assembly. A pump is positioned across the fluid supply line to supply pressurized fluid to a hydraulic actuator which is located within the axle assembly. The hydraulic actuator, such as a clutch for a differential, is susceptible to leaking fluid which can raise the fluid level in the axle assembly. A standpipe is positioned within the axle assembly and has a first end connected to the return line and a second open end located approximately even with a predetermined static fluid level. The system also includes an air intake line connecting the turbocharger to the axle assembly and has an orifice positioned thereacross for limiting the rate of flow of pressurized air which is directed therethrough. The orifice also assures that the efficient performance of the turbocharger is not detrimentally affected. In order to assure that any excess fluid within the axle assembly is routed to the transmission case, the pressurized air must be of sufficient value to overcome any head difference present between the fluid level at the second end of the standpipe and the outlet of the return line. There should also be sufficient air pressure to overcome any restrictions which may exist in or across the return line.

REFERENCES:
patent: 2617495 (1952-11-01), Johnson
patent: 3241746 (1966-03-01), Shaw
patent: 3458011 (1969-07-01), Dwyer
patent: 3862672 (1975-01-01), Tappen et al.
patent: 3913414 (1975-10-01), Freiburger
patent: 4235307 (1980-11-01), Browning et al.
patent: 4352301 (1982-10-01), Fleury

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