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Injection test device with controllable needle valve movement speed and adjustable needle valve lift

A technology of movement speed and needle valve lift, which is applied in the direction of fuel injection devices, engine testing, and measuring devices, can solve the problems of poor sensitivity and low accuracy of needle valve speed control, and achieve high-precision adjustment of needle valve speed and adjustment Effect of Needle Valve Displacement

Active Publication Date: 2019-07-30
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing needle valve movement adjustment device uses a mechanical spring and fuel to control the needle valve lift or a cylinder to control the needle valve lift, and the needle valve speed control accuracy is not high and the sensitivity is poor

Method used

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  • Injection test device with controllable needle valve movement speed and adjustable needle valve lift
  • Injection test device with controllable needle valve movement speed and adjustable needle valve lift

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Effect test

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

[0028] Such as figure 1 As shown, the present invention is a spray test device with controllable needle valve speed and adjustable lift. It includes a base device, a needle valve regulating injection device, a cavity device, a high-pressure fuel supply system, and a hydraulic control system. The oil inlet 20, the first oil channel 21, and the second oil channel 22 are arranged on the cavity device, the needle valve regulating injection device is in the cavity device, and the cavity device is connected to the base device through a hexagon socket head cap screw;

[0029] The base device includes a channel steel foot base 1, an oil injection observation box 2, a visual observation window 3, and an oil discharge joint 18; the needle valve control injection device includes: a needle valve 11, a piston 14, a displacement sensor 15, a micro Adjusting rod 16,...

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Abstract

The invention discloses an injection test device with a controllable needle valve movement speed and an adjustable needle valve lift. The injection test device with the controllable needle valve movement speed and the adjustable needle valve lift comprises a base device, a needle valve regulation injection device, a cavity device, a high-pressure fuel oil supply system and a hydraulic control system, wherein a fuel inlet and two fuel path channels are arranged on the cavity device; the needle valve regulation injection device is arranged in the cavity device; the cavity device is connected with the base device through an inner hexagonal screw; the fuel inlet is connected with the high-pressure fuel oil supply system; and the two fuel path channels are connected and provided with the hydraulic control system. The application of the injection test device is as follows that a experimental personnel through the hydraulic control system and a micro-adjusting rod, controls the movement speedof a needle valve, and the maximum stroke of the needle valve, to study the influence of the dynamic process of the needle valve on the fuel atomization; and meanwhile, a device for controlling a needle valve to ascend and descend or controlling the needle valve to ascend and descend by using a mechanical spring and fuel or an air cylinder is replaced, so that the speed of the needle valve and the displacement of the needle valve are adjusted with high precision.

Description

technical field [0001] The invention relates to the field of high-pressure spray devices, in particular to a spray test device with controllable needle valve movement speed and adjustable needle valve lift. Background technique [0002] As the emission regulations of internal combustion engines become more and more stringent, in order to further reduce emissions and save fuel consumption, and improve the thermal efficiency of internal combustion engines, a lot of research has been done on the atomization of nozzles. The study found that the geometric factors of the nozzle have a great influence on the spray, including diameter, length, shape of the injection inlet, needle valve lift and so on. Among them, the speed of the needle valve movement has a great influence on the spray, and a spray test device with controllable needle valve speed and adjustable needle valve displacement is needed. The speed of the needle valve movement can be changed through the hydraulic pressure a...

Claims

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Application Information

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IPC IPC(8): F02M65/00
CPCF02M65/00F02M65/005
Inventor 马奇浩张旭升姜正威
Owner SHANGHAI MARITIME UNIVERSITY
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