Machine element or mechanism – Gearing – Interchangeably locked
Patent
1983-02-25
1986-10-14
Dorner, Kenneth J.
Machine element or mechanism
Gearing
Interchangeably locked
74866, B60K 4118, B60K 2010
Patent
active
046165215
ABSTRACT:
A method for controlling a vehicle transmission mechanism which incorporates several selectively engageable power transmission systems each being selectively individually connectable between a first member and a second member for transmitting rotational power between them, with each such power transmission system including a clutching mechanism which can be selectively controlled either to freewheel in both rotational directions or to provide direct transmission of rotational power in one rotational direction only and to freewheel in the other rotational direction. While a first one of the power transmission systems which is for providing a certain speed stage is connected between the first member and the second member for transmitting rotational power between them at a gearing ratio appropriate to that certain speed stage, a second one of the power transmission systems which is for providing a speed stage one higher or lower than that certain speed stage is also connected in parallel with the first power transmission system between the first member and the second member, with the clutching mechanism associated with the one of these power transmission systems which provides the lower speed stage being controlled to be able to provide direct transmission of rotational power in one rotational direction only and to freewheel in the other rotational direction. Thus, this clutching mechanism of the lower speed stage power transmission system freewheels. Thereby, smooth and snappy speed stage shifting is made available. A device for practicing this method is also described.
REFERENCES:
patent: 3808903 (1974-05-01), Sauer
patent: 4262335 (1981-04-01), Ahlen et al.
patent: 4311062 (1982-01-01), Hamada et al.
patent: 4442727 (1984-04-01), Young
U.S. Patent Application Ser. No. 06/465,762, "Transmission Mechanism with Parallel Transmission Systems Including One Way Clutches, One Being Lockable", Akashi et al., filed Feb. 11, 1983.
Akashi Teruo
Ito Hiroshi
Yamada Shigemichi
Dorner Kenneth J.
Toyota Jidosha & Kabushiki Kaisha
Wright D.
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