Spray drop point testing device and method

Abstract

The invention discloses a spray drop point testing device and method. The device includes a controller, an ultraviolet camera and an ultraviolet light source; the controller is electrically connectedto the ultraviolet camera and the ultraviolet light source and has an enabling end used for electrically connecting to a to-be-tested injector; the ultraviolet camera has a shooting part used for aligning to a nozzle of the to-be-tested injector so as to shoot and record images; the ultraviolet light source has an emission part used for emitting ultraviolet light; and the central axis of the emission part is vertical to the central axis of the shooting part. Through the ultraviolet imaging on the oil beam of the nozzle, multiple oil beam drop point images of the spray oil beam on mass distribution can be obtained, and the positions of the spray drop points can be analyzed according to the multiple oil beam drop point images; The device is stable and reliable in testing result and suitablefor various injectors, can be used for quantitative analysis, and has good engineering meanings.

Description

technical field [0001] The invention relates to the field of engine testing, in particular to a spray drop point testing device and method. Background technique [0002] The distribution of the spray drop point plays an important role in the spray effect of the injector, the matching between the injector and the engine, the atomization and mixing effect of the fuel and the wet wall phenomenon. Due to the complex structure of the actual engine, it is difficult to obtain the distribution of the spray drop point in the actual situation, so it is necessary to test the spray drop point distribution of the engine injector before installation. [0003] Traditional testing is usually performed using a mechanical weighing device that has a honeycomb-shaped oil pan that measures the quality of the fuel in various places. This method is more suitable for PFI (Port Fuel Injection, intake port injection) injectors, but because it only tests the vertical distribution of spray volume, it ...

AI Technical Summary

Problems solved by technology

This method is more suitable for PFI (Port Fuel Injection, intake port injection) injectors, but because it only tests the vertical distribution of spray volume, it is not suitable for measuring GDI (Gasoline DirectInjection engine, direct injection gasoline engine) injectors drop point of spray

[0004] In addition, there are currently some schemes that take pictures of the spraying process and then conduct image analysis to obtain the spray drop point, but these schemes all use visible light photography technology, the light source is visible light, and the captured image is the reflection of visible light. On the one hand, it is impossible to obtain spray oil On the other hand, a single picture analysis will lead to unstable test results, which can only be measured qualitatively, and the actual engineering significance is low

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