Despite the development of new simulation software, vehicle chassis dynamometers are still becoming increasingly important. Ever more complex vehicle technology and new demands resulting from environmental protection requirements and purchasing behaviour make it necessary to devise new tests. The application range of chassis dynamometers has therefore been expanded.
Chassis dynamometers are a tools used to test a vehicles powertrain in its final environment, i.e. the vehicle. The tractive force of the vehicle tires is transmitted via rollers on a dynamometer. The dynamometer measures and controls the speed and force of the rollers. Chassis dynamometers are, so to speak, rolling roads.
Chassis dynamometers for exhaust emission analysis are designed to simulate the road load including the inertia of a vehicle, to measure the exhaust emissions during dynamic speed cycles in an exhaust emission laboratory.
Analysis of exhaust emissions on chassis dynamometers are a legal requirement but also a useful facility for R & D and spot check applications.
Chassis dynamometers are used in standard certification laboratories, as well as in climatic chambers, altitude chambers, running loss sheds, environmental test chambers, driveability tests and for outdoor operation (mileage accumulation).