192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Patent
1998-08-14
2000-05-09
Marmor, Charles A.
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
192 328, 192 33, F16D 3300
Patent
active
060590823
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a power transmitting arrangement comprising a fluid coupling and more particularly but not exclusively relates to a fluid coupling such as a hydraulic torque convertor or a fottinger clutch or the like used in a vehicle transmission assembly.
Power transmitting arrangements are known in which a fluid coupling transmits power from the crankshaft of an engine via an impeller and a turbine to the input shaft of a gearbox. Under certain conditions the turbine can rotate slower than the impeller i.e. the fluid coupling slips. In such arrangements it is also known to prevent coupling slip by providing a parallel path for the transmission of power from the crankshaft to the input shaft of the gearbox via an engageable lock-up clutch. The clutch is designed to engage at pre-selected speeds, dependant upon the working conditions of the vehicle, and ensures that the engine crankshaft and gearbox input shaft rotate at essentially the same speed and no slip occurs.
It is an object of the present invention to provide an improved form of a power transmitting arrangement which includes a lock-up clutch.
According to the present invention there is provided a power transmitting arrangement comprising a fluid coupling and, connected in parallel with the fluid coupling, a series arrangement of a clutch and at least one linkage arrangement, the fluid coupling, linkage arrangement and clutch each having respective input and output means, and upon engagement of the clutch the series arrangement directly connecting the fluid coupling input means to the fluid coupling output means, the or each linkage arrangement comprising at least an anchor link mounted via a pivot to one of the linkage arrangement input or output means and a main link mounted via a pivot to the other of the linkage arrangement input or output means, the anchor link and main link being connected together via a pivot so that the linkage arrangement controls the relative rotation of the input and output means of the power transmitting arrangment, when the clutch is engaged, as a result of centripetal forces acting on the links, and the linkage arrangement also including a controlling means for further control of the relative rotation between input and output means of the power transmitting arrangement.
According to a further aspect of the invention there is provided a power transmitting arrangement comprising a fluid coupling and, connected in parallel with the fluid coupling, a series arrangement of a clutch and at least one linkage arrangement, the fluid coupling, linkage arrangement and clutch each having respective input and output means, and upon engagement of the clutch the series arrangement directly connecting the fluid coupling input means to the fluid coupling output means, the or each linkage arrangement comprising an anchor link mounted via a pivot to one of the linkage arrangement input means or output means and a multi-link linkage having two or more circumferentially spaced main links mounted via respective pivots to the other of the linkage arrangement input means or output means with each main link of the or each circumferentially adjacent pair of main links being connected via a pivot to a generally circumferentially extending connecting linkage, the multi-link linkage being connected via at least one pivot with the anchor link, so that the linkage arrangement controls the relative rotation of the input and output means of the power transmitting arrangement when the clutch is engaged, as a result of centripetal forces on the links.
According to a further aspect of the invention there is provided a power transmitting arrangement comprising a series arrangement of at least one linkage arrangement and a fluid coupling, all having respective input and output means, the or each linkage arrangement comprising at least an anchor link mounted via a pivot to one of the linkage arrangement input or output means and a main link mounted via a pivot to the other of the linkage arrangement input or output means, the anchor lin
REFERENCES:
patent: 4291790 (1981-09-01), Staub, Jr.
patent: 5746296 (1998-05-01), Wirtz
Fitzpatrick-Ellis John Francis
Young Alastair John
Automotive Products plc
Daddell Tisha D.
Germain Lee A.
Marmor Charles A.
Milliken Paul E.
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