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Pump with selectable outlet pressure

A balanced pressure, variable technology, used in pumps, pump controls, non-variable pumps, etc.

Inactive Publication Date: 2010-09-01
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
Comparison scheme
Effect test

Embodiment Construction

[0024] The variable capacity impeller pump according to the first embodiment of the present invention is figure 1 and figure 2 The overall mark in the middle is 20. 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 a motor (not shown) that will be supplied by the pump 20 with pressurized working fluid.

[0025] In order to operate the pump 20, the device, such as an engine, is to be supplied with lubricating oil through the pump. When the drive shaft 28 rotates, the pump rotor 32 located in the pump chamber 36 is rotated by the drive shaft 28. In a conventional manner, the pump 20 includes a drive shaft 28 driven by any suitable means.

[0026] move. A series of slidable pump vanes 40 rotate with the rotor 32, the outer end of each vane 40 engaging the inner surface of a slip ring 44 to define a series of working fluid chambers 48, as image 3 most clearly shown.

[0027] When ...

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PUM

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Abstract

Two embodiments are provided. In the first embodiment a variable capacity vane pump has a slide 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 slide 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. In the second embodiment, a fixed capacity pump has a pressure relief valve piston with two control surfaces forming chambers with the pump housing similarly to the first embodiment, such that the pump can be operated at either of at least two selected equilibrium pressures.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/08F04D15/00
CPCF04C14/223F04C2/344F04C2/3442F04C2/102F04C14/22F04C14/26F04B49/08F04D15/00
Inventor 马修尔·威廉森
Owner MAGNA POWERTRIAN INC (US)