Auxiliary pump system for hybrid powertrains

A technology of auxiliary pump and hydraulic control system, applied in hybrid vehicles, fluid pressure actuation system components, motor vehicles, etc., can solve the problems of expensive, large size, low system efficiency, etc.

Inactive Publication Date: 2010-07-14
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these conventional auxiliary pump systems driven by electric motors may suffer from low system efficiency, may be large in size, and may be expensive

Method used

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  • Auxiliary pump system for hybrid powertrains
  • Auxiliary pump system for hybrid powertrains
  • Auxiliary pump system for hybrid powertrains

Examples

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Embodiment Construction

[0021] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application or uses.

[0022] refer to figure 1 , an auxiliary pump system in accordance with the principles of the present invention is generally designated by the reference numeral 10, with arrows indicating the preferred direction of fluid flow. Hydraulic control system 10 is preferably used in a hybrid powertrain of a motor vehicle, although it should be appreciated that auxiliary pump system 10 may be used in any type of powertrain without departing from the scope of the present invention. The auxiliary pump system 10 is operable to provide a flow of pressurized hydraulic fluid 12 to a hydraulic control system 14 or to receive a flow of pressurized hydraulic fluid 12 from the hydraulic control system 14 . The hydraulic fluid 12 may take various forms without departing from the scope of the present invention. The hydraulic control system 14 includes a source of...

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Abstract

An auxiliary pump system for a hybrid powertrain includes a hydraulic accumulator, a hydraulic transformer, a plurality of control devices, a sump, and a plurality of fluid flow paths. The accumulator is charged by a high flow, high pressure hydraulic fluid by opening a first of the control devices and closing a second of the control devices. The accumulator is discharged by closing the first of the control devices and opening the second of the control devices. A high pressure, low flow hydraulic fluid is communicated from the accumulator to the hydraulic transformer. The hydraulic transformer converts the high pressure, low flow hydraulic fluid into a high flow, low pressure hydraulic fluid that is employed by systems within the hybrid powertrain.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 100,054, filed September 25, 2008, which is hereby incorporated by reference in its entirety. [0003] FIELD OF THE INVENTION The present invention relates to an auxiliary pump system for a hybrid powertrain. Background technique [0004] The statements in this section merely provide background information related to the present disclosure which may or may not constitute prior art. [0005] A typical automatic transmission includes a hydraulic control system that is used, among other functions, to actuate a number of torque-transmitting devices. These torque-transmitting devices may be, for example, friction clutches and brakes. Conventional hydraulic control systems typically include a pump that supplies pressurized fluid, such as oil, to a plurality of valves and solenoids within a valve body. During operation of the powertrain, the pump is typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/30B60W10/24B60W20/00F16H61/00
CPCF15B21/14F15B2211/214F15B2211/88F15B2211/625F15B2211/212
Inventor P·C·伦德贝里J·C·舒尔茨V·A·尼拉肯坦
Owner GM GLOBAL TECH OPERATIONS LLC
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