ON-DEMAND HYDRAULIC PUMP FOR A TRANSMISSION AND METHOD OF OPERATION

申请公布号：US2009241535(A1)

申请号：US20080060530

申请日期：2008.04.01

申请公布日期：2009.10.01

申请人：

GM GLOBAL TECHNOLOGY OPERATIONS, INC.

发明人：SCHULTZ JOHN C.;WILTON DARYL A.;MELLET EDWARD W.

分类号：F16D31/00;F04B17/03;F04B49/00

主分类号：F16D31/00

摘要：A fixed displacement binary pump is provided for a powertrain on a vehicle. A hydraulic system is operatively connected with first and second discharge ports of the pump and is operable to alternately permit fluid flow through both discharge ports (i.e., full displacement or volumetric output of the pump) or permit flow through only the first discharge port (i.e., partial displacement or volumetric output of the pump). The pump may be packaged in a front support of the transmission. An auxiliary pump may be provided that is operable to supplement the output of the binary pump or to be used when the binary pump is off. A method of operating the binary pump and auxiliary pump is provided.

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