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Device for measuring air intake flow of engine

A technology for measuring devices and air intake flow, which is applied in the directions of measuring devices, liquid/fluid solid measurement, volume metering, etc. It can solve the problems of application limitations and long axial dimensions, and achieve simple structure, small axial dimensions, and guaranteed detection Effect of Accuracy Requirements

Inactive Publication Date: 2016-05-04
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the structural characteristics of the Venturi tube, its axial dimension is long, and its application will be limited when the layout space is extremely demanding.

Method used

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  • Device for measuring air intake flow of engine
  • Device for measuring air intake flow of engine
  • Device for measuring air intake flow of engine

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Embodiment Construction

[0022] The core of the present invention is to provide a measuring device for the intake air flow of the engine, which is basically not affected by the pipeline, and compared with the Venturi tube, has an extremely short axial dimension, has a simple structure, and is more convenient to use.

[0023] In the following, the device for measuring the intake air flow of an engine according to the present invention will be specifically introduced in conjunction with the accompanying drawings, so that those skilled in the art can accurately understand the technical solution of the present invention.

[0024] The upstream and downstream described in this article are based on the intake air flow direction of the engine. Along the intake air flow direction, the upstream is above the intake air flow direction, and the downstream is below the intake air flow direction; the upstream direction can also be defined is front, and the downstream direction can also be defined as back. The axial ...

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Abstract

The invention provides a device for measuring the air intake flow of an engine. The device is basically not affected by a pipeline, and relative to a Venturi tube, the device has an extremely small axial dimension, and is simple in structure and more convenient and rapider to use. The measuring device comprises a pore plate, the pore plate is provided with an orifice communicated with an air intake tube of the engine, a first detection port and a second detection port are formed in the upstream portion and the downstream portion of the orifice respectively, the first detection port is used for detecting the inlet pressure of the orifice and the gas temperature of an inlet, the second detection port is used for detecting the outlet pressure of the orifice, and then the air intake flow is calculated according to the inlet pressure, the outlet pressure and the gas temperature of the inlet. The influences of pipeline arrangement of the upstream portion and the downstream portion of the pore plate on measurement are small, the structure of the pore plate is simple, especially the axial dimension is small, the requirements for installation space are low, needed installation space is small, and the device can be better suitable for measurement of the air intake flow of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a measuring device for engine air intake flow. Background technique [0002] The measurement of the intake air flow of the engine is very important, and the flow measurement method mainly used at present is to use the hot-film air flow meter to measure. However, the hot-film air flowmeter has some disadvantages. For example, it has very strict requirements for the layout of the front and rear pipelines. A slight change in the pipeline will cause a large deviation in measurement accuracy. Moreover, the layout of the front and rear pipelines It is not controlled by the engine manufacturer and is subject to relatively large restrictions during use. [0003] In view of the above technical problems, Venturi tubes are gradually used in the prior art to replace hot film air flow meters. Venturi tube is a device that uses differential pressure to measure the flow through the pipeline. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/42G01F15/04
CPCG01F1/42G01F15/04
Inventor 南宁宁栾军山姚旺代子阳李峰
Owner WEICHAI POWER CO LTD
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