A chassis dynamometer is a device used to measure the power output and performance of a vehicle's engine while it is in motion. It simulates real-world driving conditions by placing the vehicle on rollers that mimic the road. As the vehicle accelerates, the dynamometer measures parameters such as speed, torque, and horsepower, providing valuable data for tuning and diagnostics. These systems are commonly used in automotive testing, research, and development. By analyzing the results, engineers can optimize vehicle performance, improve fuel efficiency, and ensure compliance with emission standards. Chassis dynamometers are essential tools in the automotive industry.