Two-stage variable displacement oil pump

A displacement machine and variable technology, which is applied to lubricating pumps, mechanical equipment, engine components, etc., can solve the problems of high cost of solenoid valve oil pumps and restrictions on the layout of oil pumps, and achieve low cost, flexible layout, and stable oil output Effect

Active Publication Date: 2017-09-19
ZHEJIANG GEELY POWERTRAIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the variable displacement oil pump controlled by a solenoid valve leads to a higher cost of the oil pump because the solenoid valve is more expensive, and the arrangement of the plug-in wires limits the arrangement of the oil pump.

Method used

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  • Two-stage variable displacement oil pump
  • Two-stage variable displacement oil pump

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] like figure 1 In the illustrated embodiment, a two-stage variable displacement oil pump includes a pump body 1 , a rotor 11 , an adjusting ring 10 and a mechanical valve. Wherein, the pump body 1 is provided with an oil inlet 8, an oil outlet 2, and an inner cavity 1a, and both the adjusting ring 10 and the rotor 11 are located in the inner cavity 1a, the adjusting ring 10 is provided with a circular inner hole 10c, and the rotor 11 is located in the inner cavity 1a. The rotor 11 is provided with a vane 11a that can move radially along the rotor 11 as the rotor 11 rotates in the inner hole 10c and is arranged eccentrically relative to the inner hole 10c. The adjustment ring 10 is provided with a rotating positioning end on the side close to the oil inlet 8, and the rotating positioning end is rotationally connected with the pump body 1 ...

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Abstract

The invention discloses a two-stage variable displacement oil pump. The two-stage variable displacement oil pump comprises a pump body and a stator; the pump body is provided with an oil inlet and an oil outlet; the stator is provided with a blade which can rotate along the stator and move along the radial direction of the stator; an adjusting ring which can rotate relative to the pump body and an action chamber which can drive the adjusting ring to rotate are arranged inside the pump body; the stator is arranged inside an inner hole of the adjusting ring; the stator and the inner hole are arranged eccentrically; a main oil channel opening is formed in the pump body; an oil outlet feedback oil circuit which is communicated with the oil outlet, a main oil channel feedback oil circuit which is communicated with the main oil channel opening and a mechanical valve which can switch the oil outlet feedback oil circuit or the main oil channel feedback oil circuit to be communicated according to oil pressure of the oil outlet are arranged inside the pump body. The two-stage variable displacement oil pump can respectively control oil flow rate at low speed and high speed of an engine, meanwhile reduces costs, saves oil consumption and is convenient to arrange.

Description

technical field [0001] The invention relates to the field of engine oil pumps, in particular to a two-stage variable displacement engine oil pump. Background technique [0002] With the rising fuel prices and increasingly stringent fuel consumption regulations, new technologies are required to be continuously adopted in engine development to reduce engine fuel consumption. The traditional constant displacement oil pump is designed based on the oil demand of the engine at hot idling speed. Since the total flow of the oil pump increases almost linearly with the change of the speed, the oil output is too much at high speed, and an oil pressure limiting valve is required to discharge excess oil. , which is equivalent to wasting a part of the engine power consumption, so the application of the variable displacement oil pump is also produced. [0003] At present, the on-off of the electromagnetic valve is mainly used to control the displacement of the oil pump. For example, the C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16N13/20
Inventor 徐亦龙张元东宋志辉袁爽沈源王瑞平
Owner ZHEJIANG GEELY POWERTRAIN CO LTD
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