A STUDY OF MOTORCYCLE ENGINES IN TYPICAL URBAN DRIVING CONDITIONS 978457
Motor vehicle noise is regulated by the pass-by provisions of ISO 362. Although motorcycle noise levels have fallen significantly, in line with the legal requirements, there is still a difference between noise levels for new and in-use vehicles. A research program was initiated to compare in-use motorcycle operating conditions with the requirements of the pass-by test. Ten current production motorcycles were monitored during actual urban driving conditions in several European cities during various driving periods. The results show the pass-by provisions of ISO 362 do not reflect actual in-use operating characteristics of modern motorcycles. To be representative, the test procedure should be based on engine rpm and not vehicle speed.
Nicholas Rogers, Rudi Lindermaier, Deane Jaeger
Small Engine Technology Conference & Exposition