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Powertrain and control having a plurality of accumulators
U.S. Patent Number: 5393273
Abstract: A multi-speed transmission has a hydraulic control system for establishing a plurality of forward drive ratios and a reverse drive ratio. Each drive ratio is established by the engagement of a fluid operated friction device, such as a clutch or brake. The engagement timing of each friction device is controlled in part by an accumulator. Each accumulator is disposed to accommodate friction devices, such that five forward speed and one reverse speeds require only a maximum of three accumulators.
Inventors: Haka; Raymond J. (Rochester, MI)
Assignee: General Motors Corporation (Detroit, MI)
Application Number: 08/080,268
Issued: 1995-02-28
Expired: 2007-02-28
Classes: 475/129 ; 477/150; 74/335
Field of search: 475/129 74/335 477/150
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