Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Patent
1995-10-13
1997-12-30
Marmor, Charles A.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
475 84, 418 32, F16H 4830
Patent
active
057023190
ABSTRACT:
A hydromechanical system for limiting differentiation between a first rotating member and a second rotating member in a drivetrain subassembly. The hydromechanical system comprises a clutch assembly for selectively coupling the first rotating member to rotate with the second rotating member and a hydraulically actuated piston assembly for applying force on the clutch assembly to actuate the clutch assembly in response to hydraulic pressure such that the first rotatable member is selectively coupled to rotate with the second rotatable member. A clutch actuating pump, including a reservoir, is provided for supplying hydraulic pressure to the piston assembly to actuate the piston assembly, wherein the clutch actuating pump communicates hydraulic fluid under pressure to the piston assembly in response to differential rotation between the first and second rotating members. A second pump is also provided in fluid communication with the reservoir of the clutch actuating pump for supplying hydraulic fluid to the reservoir of the clutch actuating pump. The hydromechanical system is well suited for use in a four-wheel drive transfer case to control differentiation between the front and rear output shafts thereof.
REFERENCES:
patent: 3748928 (1973-07-01), Shiber
patent: 3894446 (1975-07-01), Snoy et al.
patent: 3990327 (1976-11-01), Margolin
patent: 4353269 (1982-10-01), Hiersig
patent: 4727966 (1988-03-01), Hiramatsu et al.
patent: 4730514 (1988-03-01), Shikata et al.
patent: 4743180 (1988-05-01), Sickenger
patent: 4776424 (1988-10-01), Naito
patent: 4811614 (1989-03-01), Lasoen
patent: 5310388 (1994-05-01), Okcuoglu et al.
patent: 5320586 (1994-06-01), Baxter, Jr.
patent: 5494421 (1996-02-01), Wada et al.
patent: 5501585 (1996-03-01), Ogawa et al.
patent: 5536215 (1996-07-01), Shaffer et al.
Dana Corporation
Kwon Peter T.
Marmor Charles A.
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