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Oil injection law measuring system and method

A technology of measuring system and fuel injection law, applied in measuring device, charging system, fuel injection device, etc., can solve problems such as poor linearity

Active Publication Date: 2015-01-21
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] Only in the liquid phase fluid area, the measured pressure can accurately obtain the corresponding relationship with the flow rate, and in the non-liquid phase fluid area, the linearity is very poor

Method used

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  • Oil injection law measuring system and method

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 It is a measurement system of the present invention. It includes: a high-pressure oil pump 1 that pressurizes the fuel through the low-pressure oil circuit D to provide high-pressure fuel, a pressure accumulator 2 connected with the high-pressure oil pump 1 to store the fuel pumped out by the high-pressure oil pump and stabilize the oil pressure; In the output oil circuit of the pressure accumulator 2, it is used to inject the high-pressure fuel in the pressure accumulator 2 to the downstream injector 5; a piezoelectric sensor 6 is used to receive the fuel jet sprayed by the fuel injector 5 and measure the impulse force of the fuel jet (such as a quartz piezoelectric sensor), the signal generated by the piezoelectric sensor 6 enters a data acquisition device 7 through an amplifier 8, and the amplified signal; a metering device 4 posit...

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Abstract

The invention relates to an oil injection law measuring system and method. In the measuring system, an oil injection hole and a piezoelectric sensor are correspondingly arranged, and a distance adjusting device is additionally arranged to be used for adjusting the distance between the piezoelectric sensor and the oil injection hole. According to the method, the output signal start-stop interval time of the sensor and the oil injection extended period are compared, the distance adjusting device is driven to adjust the distance between the sensor and the oil injection hole until the output signal start-stop interval time of the sensor and the oil injection extended period are basically the same and the output waveform of the sensor is mostly stable, and at the moment, the position of the sensor is the optimum flow measuring position. By means of the oil injection law measuring system and method, it is guaranteed that measuring can be conducted in a liquid phase fluid area, and meanwhile measuring stability can be guaranteed.

Description

technical field [0001] The invention relates to a measurement system and method for fuel injection regularity. Background technique [0002] The fuel supply of the engine is generally to use the fuel injection method to generate fine oil droplet groups, the purpose is to increase the evaporation and gasification area of ​​the fuel, and increase the heat release of combustion. This is a rather complex question. Fuel spray is not only affected by the structure of the injector (multi-hole injectors are often used in diesel engines), injection pressure, and needle valve lift, but also by the pressure, temperature, and airflow movement (including macroscopic flow and turbulent flow) in the cylinder. )Impact. After the fuel enters the cylinder, the formation process of the oil beam is very complicated, which includes the atomization of the oil beam, the breaking of the oil droplet, the collision and aggregation of the oil droplet, the collision of the oil beam and the evaporatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M65/00
Inventor 杜慧勇刘建新李民王站成张紫微徐斌吴健
Owner HENAN UNIV OF SCI & TECH
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