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Multi-ported valve control function test method

A technology of control function and test method, which is applied in the direction of machine/structural component testing, measuring electricity, measuring devices, etc., and can solve problems affecting the normal operation of diesel engines and complex structures.

Inactive Publication Date: 2017-07-07
HUDONG HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-way valve is one of the most critical components. Its structure is complex, including electronic control parts and mechanical parts. Once a failure occurs, it will affect the normal operation of the diesel engine.

Method used

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  • Multi-ported valve control function test method
  • Multi-ported valve control function test method

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Embodiment Construction

[0019] Embodiments of the present invention are described below with reference to the drawings, in which like parts are denoted by like reference numerals.

[0020] In the present invention, when a current signal is input to the proportional valve, the internal spool of the proportional valve will move, and the proportional valve itself will feed back a voltage signal. By comparing the signal input and output values ​​and observing the position of the spool, it is judged whether the control function of the proportional valve is normal.

[0021] The equipment required for the test is: DC stabilized power supply 4; adjustable signal generator 2, which can provide at least 4mA-20mA output; voltage testing device 3, such as voltmeter and multimeter. The devices can be connected via an intermediate junction box 5 .

[0022] The multi-way valve control function testing method of the present invention comprises the following steps:

[0023] S1: if Figure 7 The proportional valve 1...

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Abstract

A multi-ported valve control function test method comprises the following steps of S2, providing following signal input for a proportioning valve: 4mA, 12mA and 20mA; S3, under three input conditions of the 4mA, the 12mA and the 20mA, determining whether a proportioning valve core position is at a correct position respectively; measuring a voltage signal fed back by a proportioning valve respectively, and comparing to a proportioning valve feedback voltage signal reference value; and S4, if the voltage signal fed back by the proportioning valve is the same with the reference value, and the valve core position is correct, determining that functions of the proportioning valve are normal. In the invention, through inputting a current signal to the proportioning valve, an internal valve core carries out operation and simultaneously the proportioning valve feeds back the voltage signal, and signal input and output values are compared and the valve core position is observed so that whether a control function of the proportioning valve is normal can be determined.

Description

technical field [0001] The invention relates to the technical field of marine diesel engines, in particular to a method for testing the control function of a multi-way valve of a cylinder hydraulic unit of a marine diesel engine. Background technique [0002] During the operation of the marine diesel engine (ME-C model), it is necessary to control the fuel injection and the opening and closing of the exhaust valve through the action of the multi-way valve. multi-way valves (such as figure 1 shown) by the three-position four-way proportional valve (such as figure 2 Shown, hereinafter referred to as the proportional valve) and the main valve combination. The action of the multi-way valve is controlled by the upper three-position four-way proportional valve (that is, the multi-way valve control valve). The multi-way valve is one of the most critical components. Its structure is complex, including electronic control parts and mechanical parts. Once a failure occurs, it will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01M99/00
CPCG01M99/00G01R31/00
Inventor 王煜姚晶
Owner HUDONG HEAVY MACHINERY
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