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Pump with selectable outlet pressure

A balanced pressure, variable technology, applied in pumps, pump control, non-variable pumps, etc., can solve problems such as waste of energy

Inactive Publication Date: 2007-09-26
MAGNA POWERTRIAN INC (US)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at lower speeds, the pump will operate at a higher pressure than required at these speeds, wasting energy

Method used

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  • Pump with selectable outlet pressure
  • Pump with selectable outlet pressure
  • Pump with selectable outlet pressure

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] A variable capacity impeller pump according to a first embodiment of the present invention is generally designated 20 in FIGS. 1 and 2 . In this embodiment, the pump 20 includes a housing 22 having a front face 24 that is sealed by a pump cover (not shown) and suitable gaskets to an engine (not shown) to which the pump 20 will supply pressurized working fluid.

[0022] In a generally conventional manner, the pump 20 includes a drive shaft 28 that is driven by any suitable means to operate the pump 20, such as an engine through which lubricating oil is to be supplied. When the drive shaft 28 is rotated, the pump rotor 32 located within the pump chamber 36 is rotated by the drive shaft 28 . A series of slidable pump vanes 40 rotate with the rotor 32 , the outer ends of each vane 40 engaging the inner surface of the slip ring 44 to define a series of working fluid chambers 48 , as best shown in FIG. 3 .

[0023] When the center of slip ring 44 is eccentrically positioned ...

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PUM

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Abstract

A variable capacity vane pump is provided, the pump having a pump ring which is moveable to alter the capacity of the pump and the pump can be operated at either of at least two selected equilibrium pressures. The pump ring is moved by a control piston with dual control surfaces, the control piston being received in a housing on the pump case and the two control surfaces cooperating with the housing to form two chambers in which pressurized working fluid can be received. When pressurized fluid is supplied to only one chamber, the pump operates at a first equilibrium pressure and when pressurized fluid is also supplied to the second chamber, the pump operates at a second equilibrium pressure. If the relevant areas of the chambers differ, three equilibrium pressures can be selected between by applying pressurized fluid to one, or the other or both chambers.

Description

technical field [0001] The present invention relates to a variable-capacity impeller pump or a fixed-capacity pump. More specifically, the present invention relates to a pump of any type capable of selecting between at least two different equilibrium pressures. Background technique [0002] Variable-capacity impeller pumps are well known and feature a capacity-adjusting element in the form of a ring known as a slip ring and capable of moving to change the centrifugal rate and thus the volumetric capacity of the pump. If the pump is supplying a system such as an automobile engine lubrication system with substantially constant fluid resistance, changing the output of the pump is equivalent to changing the pressure produced by the pump. [0003] The ability to vary pump flow is important in environments such as automotive lube oil pumps, where the pump will be operated over the entire operating speed range. In such an environment, it is well known to move the slip ring by fee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/08F04D15/00
CPCF04B49/08F04C2/102F04C2/344F04C2/3442F04C14/22F04C14/223F04C14/26F04D15/00
Inventor 马修尔·威廉森
Owner MAGNA POWERTRIAN INC (US)