BS ISO 18580:2015 pdf download – Motorcycles — Verification of total running resistance force during mode running on a chassis dynamometer.
1 Scope This International Standard specifies the verification method of total running resistance force when the exhaust gas emissions and/or fuel consumption of motorcycles are measured during mode running on a chassis dynamometer. The performance of chassis dynamometer is verified by comparing the measured total running resistance force (measured by a chassis dynamometer absorption force) and the target total running resistance force (calculated from velocity, acceleration and/or deceleration). This International Standard is applicable when the running resistance force of a chassis dynamometer is set in accordance with ISO 11486. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 equivalent inertia mass of motorcycle m i mass obtained by adding the rotating mass of the front wheel to the total mass of the motorcycle, rider and instruments 2.2 mechanical equivalent inertia mass of chassis dynamometer m b equivalent inertia mass of mechanical rotating parts of chassis dynamometer, e.g. roller and shaft and/or fly wheel 2.3 chassis dynamometer absorption force F dy tangential force acted on the roller surface which is calculated from a roller shaft or motor cradling torque and roller radius Note1toentry:Thechassisdynamometerabsorptionforceistherunningresistanceforceforachassisdynamometer equipped with a mechanical flywheel equivalent inertia mass system and is sum of running resistance force and inertia force generated by motorcycles for a chassis dynamometer using the electric inertia function. 2.4 total friction loss of a chassis dynamometer F f friction and aerodynamic loss of rotating parts of chassis dynamometer, e.g. bearings and roller(s) 2.5 running resistance force rolling resistance and aerodynamic loss of motorcycle on flat surface 2.6 inertia force force generated by inertia mass of motorcycle or chassis dynamometer during acceleration and/or deceleration
2.7 total running resistance force sum of running resistance force and inertia force of motorcycle 2.8 target total running resistance force F tg total running resistance force calculated in accordance with equivalent inertia mass of motorcycle, velocity, acceleration and/or deceleration 2.9 measured total running resistance force F m sum of the chassis dynamometer absorption force, total friction loss of chassis dynamometer and an inertia force generated by the mechanical equivalent inertia mass of chassis dynamometer 2.10 target integral work W tg integral work calculated in accordance with measured velocity and F tg during test mode running, in kilo joule 2.11 measured integral work W m integral work cal