Emissions Analytics’ tyre emissions measurement methodology is designed to measure real-world tyre wear emissions in a standardised way that allows comparison between different tyre and vehicle combinations.

Measurements take place in real road conditions, including on the public highway. The method is designed to achieve high time and spatial measurement resolution, and to identify tyre wear emissions independently of other non-exhaust emissions including brake wear, road wear and resuspended material.

Tyre mass loss measurement

• The basis of the method is to weigh all four wheels at the start and end of the test. The tyres remain on the rims throughout. Mass measurement is be taken by scales with a resolution of 1g.

Real-time mass and number

• Alongside the mass loss measurement, a real-time signal is collected from a sampling ‘scoop’ positioned immediately behind one or more tyres.

• Measurement of real-time particle size distribution and concentration in the size range of 6 nm-10 μm at 10 Hz sampling rate.