Chassis dynamometer

There are many types of chassis dynamometer according to the target application - for example, emissions measurement, miles accumulation chassis dynamometer (MACD), Noise-Vibration-Harshness (NVH or "Acoustic") Application, Electromagnetic Compatibility (EMC) testing, end of line (EOL) tests, performance measurement and tuning.

Older constructional solutions are two roller per wheel and vehicle is place between these rollers - this design solution is cheaper and simpler, however, due to the requirements for accuracy and strict limits is no longer used for the development of new vehicles, but only as a test dynamometer at the end of the line or to measure the performance of the engine without dismantling,[3] or performance tuning in "garage" companies.

[5] Because the vehicle is secured to the chassis dynamometer, it prevents variables such as wind resistance to alter the data set.

The chassis dynamometer is designed to add the sum of all the forces that are applied to a vehicle when driven on an actual road course to be simulated through the tires and calculated in the test results.

During vehicle adaptation dynamometer automatically slowing down from set speed, changing its own "dyno parameters" and trying to get same deceleration in given intervals as on real road.