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Dual-pump and filter components of transmission device and method for assembling the components

A filter assembly, filter technology, applied in transmission parts, belts/chains/gears, mechanical equipment, etc., can solve problems such as limited space

Inactive Publication Date: 2009-04-15
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the space available in hybrid transmissions is limited, so a compact design of the transmission filter is required

Method used

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  • Dual-pump and filter components of transmission device and method for assembling the components
  • Dual-pump and filter components of transmission device and method for assembling the components
  • Dual-pump and filter components of transmission device and method for assembling the components

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Embodiment Construction

[0014] Referring to the drawings, in which like symbols indicate like or corresponding parts throughout, a schematic diagram of a transmission fluid distribution system 10 is shown in FIG. 1 . Fluid distribution system 10 includes a sump or container 12 that preferably holds hydraulic fluid. The main pump 14 draws hydraulic fluid from the reservoir 12 through a filter 16A. Auxiliary pump 18 draws hydraulic fluid from reservoir 12 through filter 16B. A control module (not shown) selects which pump 14, 18 to operate based on, for example, vehicle speed, pressure requirements, cooling requirements, operating states of vehicle components, and the like. The pumps 14 , 18 deliver pressurized hydraulic fluid to the transmission 20 . A shuttle valve 23 combines the output 17 of the two pumps 14 , 18 and routes it to a pressure regulator valve 22 which sends excess pump flow back to the inlet of the main pump 14 . According to the preferred embodiment of the present invention, the h...

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Abstract

A method and apparatus for a compact dual transmission filter design is provided. More precisely, a single filter housing is adapted to accommodate a primary filter and an auxiliary filter in fluid communication with a primary pump and auxiliary pump, respectively. The single filter housing having two filters disposed therein is more compact than a conventional design incorporating a separate filter housing for each filter.

Description

technical field [0001] This invention relates to dual gear filter designs. Background technique [0002] Conventional drive pumps are driven by the output from the engine. When a hybrid vehicle is being electrically operated, the engine is off and therefore the conventional transmission pump does not operate. Thus, when the engine is off, an auxiliary electric pump may be implemented for purposes such as meeting the cooling and lubrication needs of a hybrid vehicle. Every pump in a hybrid transmission requires a filter element through which the transmission fluid is drawn. However, the space available in hybrid transmissions is limited, thus requiring compactly designed transmission filters. Contents of the invention [0003] Methods and apparatus for compact dual gear filter design are provided. More precisely, a single filter housing is adapted to accommodate a main filter and an auxiliary filter in fluid communication with the main pump and the auxiliary pump, respe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/00
Inventor K·约翰逊J·C·舒尔茨C·B·于瓦里
Owner GM GLOBAL TECH OPERATIONS LLC