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variable capacity pump

A volumetric pump, variable technology, applied in the direction of pumps, pump components, pump control, etc., can solve problems such as high operating capacity and waste of energy

Active Publication Date: 2017-09-22
HANON SYST EFP CANADA LTD ONTARIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, at low speeds or low engine loads, the pump operates at a higher capacity than necessary, thus wasting energy in pumping excess, unneeded working fluid through the hydraulic system

Method used

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Examples

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Embodiment Construction

[0028] The variable capacity vane pump according to an embodiment of the present invention is figure 1 is shown generally at 20 . The pump 20 includes a housing or casing 22 having a front surface 24 which is sealed to an engine (not shown) or the like with a pump cover (not shown) and optionally a suitable gasket (not shown). , the pump 20 is used to provide compressed working fluid to an engine or the like.

[0029] Pump 20 includes a drive shaft 28 driven by any suitable means, such as an engine or other mechanism that provides working fluid from the pump, to operate pump 20 . The pump rotor 32 located within the pump chamber 36 is driven by the drive shaft 28 as the drive shaft 28 rotates. A series of slidable pump vanes 40 rotate with the rotor 32 , the outer end of each vane 40 engaging the inner circumferential surface of a pump control ring 44 which forms the outer wall of the pump chamber 36 . The pump chamber 36 is divided into a series of working fluid chambers 4...

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PUM

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Abstract

A variable capacity pump includes a control ring moveable within a pump chamber to alter the volumetric capacity of the pump. First and second control chambers individually receive pressurized fluid to create forces to bias the control ring in a predetermined direction. A return spring urges the control ring toward a maximum volumetric capacity pump position. The control ring connects and disconnects the second control chamber from a source of pressurized fluid based on a position of the control ring. Forces from the control chambers and the spring act in combination with one another or against one another and against the spring force to establish first and second equilibrium pressures based on a pressurized or vented condition of the second control chamber.

Description

technical field [0001] The present invention relates to variable displacement vane pumps. In particular, the present invention relates to variable displacement variable pressure vane pump systems for use in mechanical systems such as internal combustion engines or automatic transmissions. The present invention relates to improved pumps and controls for providing better control of the output of variable capacity pumps. More specifically, the present invention relates to a flow demand optimized control mechanism to control the output of a variable capacity pump under different operating conditions. Background technique [0002] Pumps for non-compressible fluids such as oil are often variable displacement vane pumps. Such pumps include movable pump rings which allow changing the eccentricity of the pump's rotors to change the capacity of the pump. [0003] Being able to vary the volumetric capacity of the pump to maintain a balanced pressure is important in environments such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C14/22F01M1/02F04C2/344
CPCF04C14/226F01M1/02F01M1/16F01M2001/0238F01M2001/0246F04C2/336F04C2/344F04C14/24F04C2240/30
Inventor 塞萨尔·塔纳苏卡大卫·R·苏维尔汉斯·尤尔根·劳思
Owner HANON SYST EFP CANADA LTD ONTARIO