A method for measuring exhaust smoke opacity has been developed, which allows estimating the differentiated components forming black exhaust and those forming white smoke. The method is based on video recording and special software for processing the video recording data. The flow of the diesel exhaust gas is visualised using the digital camera, against the background of the screen, on a cut of an exhaust pipe, and with sufficient illumination of the area. The screen represents standards of whiteness and blackness. The content of the black components (soot) is determined by the degree of blackening of the white standard in the frames of the video, and the content of whitish components (unburned fuel and oil, etc.) is determined by the degree of whitening of black standard on the frames of the video. The paper describes the principle and the results of testing the proposed method of measuring exhaust smoke opacity. We present an algorithm for the frame-by-frame analysis of the video sequence, and static and dynamic mathematical models of exhaust opacity, measured under free-acceleration of a diesel engine.

The Rules of UNECE № 24 regulated a test method of diesels on the mode of free acceleration. Thus one of procedures provides obtaining opacity estimates of the exhaust gases in very subjective method. Due to the fact that this procedure doesn't include quantitative parameters, it can be understood and implemented by operators differently, that consequently leads to considerable dispersion in results of opacity measurements in practice. Mathematical models of opacity of the exhaust gases depending on rate of movement of a fuel feed pedal is obtained. The technique of a correcting of opacity estimates of the exhaust gases of diesels on the mode of free acceleration with use of static and dynamic models is offered. Keywordsexhaust gases of diesels; opacity estimates; techniques of correcting; static and dynamic models; tests of diesel This Publication has to be referred as: Blyankinshtein, I[gor]; Voevodin, E[vgeniy] & Ruban, A[natoliy] (2016). Techniques of Adjusting Opacity Estimates of the Diesel Exhaust Gases, Proceedings of the 26th DAAAM International Symposium, pp.0883-0891, B. Katalinic (Ed.