Abstract
Abstract
According to the latest research results, the most common pollutant in the most development industrial countries just after air and water pollution is noise pollution. Due to this fact the noise and vibration reducing is one of the basic tasks for technical acoustic. Over thirty five years allowed environmental noise quantity produced by vehicles is defined by ECE 51 Regulation. Alongside with intake noise, noise produced by exhausting system is a potential the major noise source. The exhausting systems should have to overcome two opposite demands: to reduce noise level but not to endanger vehicle performances, est. is. not to affect to engine power train performances. In this paper, the results of the obtained noise level through the five different exhausting systems examination for Koral 1.1 In vehicle, according to the ECE Regulation 51.02, are shown. Also in this paper, the results of laboratory tests of engine performances for Koral 1.1 In vehicle with five different exhausting systems are shown. The laboratory tests were performed on the dynamometer rollers in the DRP- IA.
Keywords: vehicle, exhausting system, noise, ECE Regulation 51.02. engine, dynamometer rollers