What is a chassis dynamometer?

A chassis dynamometer is a device used to measure the performance of a vehicle by simulating road conditions while the car remains stationary. It works by allowing the vehicle's wheels to rest on rollers, which can be controlled to create resistance and simulate different driving scenarios. This equipment is commonly used for emissions testing, fuel economy measurement, and performance diagnostics. Chassis dynamometers are essential tools in automotive testing laboratories and are also used by manufacturers and regulatory agencies to ensure vehicles meet required standards.