Technical Paper
A Novel Transient Drop Sizing Technique for Investigating the Role of Gasoline Injector Sprays in Fuel Mixture Preparation
2004-03-08
2004-01-1349
A novel measurement technique to evaluate the transient nature of the pulsing sprays from gasoline fuel injectors is created by combining and synchronizing established laser diffraction and high-speed imaging measurements. Both laser diffraction measurements and high-speed images are synchronized, enabling a maximum of two thousand measurements per second to be acquired. By combining the time-resolved drop size measurements with the synchronized spray images, the transient nature of the spray characteristics in relation to injector logic signal timing, injection frequency, and measurement location can be revealed. In addition, the drop size and optical concentration (or obscuration) trends of the spray can be correlated. This paper presents experimental results using this technique on a production dual spray port fuel injector spray.