A tracer injection system for visualizing engine measurements

An injection system and tracer technology, which is used in engine testing, engine components, machines/engines, etc., can solve problems such as inability to fully and effectively calibrate engine measurement objects, large gaps and errors, and unsatisfactory uniformity. Achieve the effect of saving experimental preparation time, optimizing mixing, and improving observation accuracy

Active Publication Date: 2017-12-22
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]3) The traditional LIF method to measure the gas mixture concentration is often calibrated in a pressure vessel, such as a constant volume incendiary bomb, but there is a gap between the calibration environment and the actual situation in the engine cylinder big error
[0007] 4) The distribution of laser energy in a sheet of light cannot be absolutely uniform, and the uniformity of the mixed gas of tracer and fuel formed in the cylinder during actual calibration is not ideal
[0008] 5) In conventional measurement, the tracer is generally mixed with fuel for injection measurement and calibration, but limited to the projection angle of the laser and the limitation of the measurement range, it is impossible to fully and effectively calibrate the measurement objects in the engine

Method used

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  • A tracer injection system for visualizing engine measurements
  • A tracer injection system for visualizing engine measurements
  • A tracer injection system for visualizing engine measurements

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Experimental program
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Embodiment Construction

[0020] (1) Use conventional 3-pentanone with a volume fraction of 10% (Scheme 1), or acetone with a volume fraction of 10% (Scheme 2) and 3-hexanone with a volume fraction of 9% and a volume fraction of 1% 3-Pentanone was mixed in a ratio of 4:1 by volume (Scheme 3) in a tracer proportioning scheme separately placed in the tracer injection valve.

[0021] (2) Use commonly used isooctane or n-pentane with weak fluorescent effect as an alternative fuel, control it through the injection system, place it in the fuel injector, turn on the laser, and adjust the angle to 15° to the axis of the engine cylinder head 65°.

[0022] (3) The piston moves from the top dead center to the bottom dead center driven by the crankshaft; at this time, the intake valve opens, the exhaust valve closes, and the crankshaft rotates 180°. At this time, the tracer and air quickly mix and enter the cylinder. It is further mixed with alternative fuels in the cylinder to form a combustible mixture.

[002...

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Abstract

The invention relates to a visualization engine, in particular to a tracer injection system for a visualization engine. It mainly includes the cylinder head, which is characterized in that: a hole is opened in the center of the cylinder head, and a fuel injector is arranged in the hole, which can directly inject fuel into the cylinder; a hole is opened on the side of the air inlet of the cylinder head, and a There is a tracer injection valve such that the tracer injection valve communicates with the intake passage of the cylinder head. The system uses an independent tracer and fuel injection system, which can effectively control the amount of tracer, save costs, improve economy, and reduce unnecessary secondary reaction problems caused by excessive metering; at the same time, effectively eliminate When the concentration of the fluorescent substance is too high, the phenomenon of self-quenching will occur.

Description

technical field [0001] The present invention relates to a visual engine, in particular to a tracer injection system for a visual engine, which is used to collect data related to its internal combustion by advanced laser-induced fluorescence technology (PLIF), involving combustion spray technology, optical measurement means, detection Technology, chemical application technology, computer collection technology and imaging technology and other disciplines of the latest technical issues. Background technique [0002] The development of the combustion theory and technology of the new generation of internal combustion engines has brought the technology of diesel engines and gasoline engines closer and closer. The engine may organize different combustion methods according to the changes in the composition of the mixed fuel. Therefore, it is necessary to fully understand the spray characteristics and combustion of various mixed fuels. characteristics; since the 1970s, different meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M65/00
Inventor 施爱平许冠杰叶丽华庞弋骧李成郑庆明徐杰白文斌
Owner JIANGSU UNIV
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