The Rise Of The Dyno-Saurs

Ricardo explains the latest developments in dynamometer systems for the motorsport industry

- Stewart Mitchell

Engine dynamometers are systems used to measure the performance of a powertrain. They allow engineers to characterise the performance and behaviour of engines in a controlled environment on a consistent base, rather than out on track where variables would make their work much more challenging.

Dynamometers come in many forms and are designated according to their modes of operation. The most basic are capable only of applying load in a single direction, and typically use water brakes or eddy current drives to apply that load.

The most sophisticated can apply and absorb load by the powertrain under test. These are often referred to as motoring dynos and use either electric motors or hydrostatic pumps. The ability to absorb torque allows input forces to the powertrain to be simulated.

Although torque output is critical in motorsport, in energy-limited formulae such as today’s Formula 1 and Formula E, the drive for efficiency is paramount. Here, dynamometers are used as much for efficiency measurement and drive cycle testing as they are for tuning for outright performance.