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Technical Paper

Increased 2-Wheeler Development Efficiency by Using a New Dedicated Test System Solution

2019-01-09
2019-26-0348
Fuel consumption is the most important contributor to the total cost of ownership for mass produced motorcycles. Therefore, best fuel economy is one main influencing criteria for a decision to purchase motorcycles. Furthermore, increasingly stringent emission legislations limit and additional OBD requirements must be fulfilled. A new combined test approach has been developed that minimizes accuracy losses in the development process which compensates for the variability of driving behavior in the chassis dyno environment. An engine testbed combined with a belt drive transmission enables operation in single engine or in Powerpack (i.e. internal combustion engine including transmission) configuration as well as under steady state or dynamic operating mode. Since the belt drive transmission is integrated in the test rig, realistic inertia situation for the single engine operating test configuration is ensured.
Technical Paper

Advanced 2-Wheeler Powertrain Test Setup for Dynamic Fuel Consumption Measurement with Increased Accuracy, Repeatability and Data Quality

2020-01-24
2019-32-0518
Specific test systems are essential for the development and optimization of powertrains for two-wheeler applications. The World Motorcycle Test Cycle (WMTC) is prevalently used for type approval certification in terms of emissions and fuel consumption. In this respect, decreasing fuel consumption and increasing efficiency within the WMTC is an important development goal. The aim of the development project presented in this paper was to investigate how the robustness and repeatability of the measurement data can be increased by using a specific measurement procedure and test setup. As fuel consumption and emission levels reach ever lower levels, any influencing factors related to performance and emissions are of particular interest within the powertrain development phase. When it comes to the differentiation of specific influencing factors such as lube oil behavior and its contribution to fuel consumption, very high measurement-repeatability and accuracy must be maintained.
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