Analyzer Spectrum Hofmann chassis dynamometers for climatic testing are available as standard in single roller, 4×2, 4×4, and independent configurations.
The precision manufactured rollers are available from 0.5m to 2.5m in diameter, running in rolling element bearings which may be temperature controlled according to the application. Roller assemblies can be coated to increase tyre traction.
Trunnion mounted AC motors which compensate for system losses and simulate road load forces, vehicle inertia, and gradient are mounted on the dynamometer base frame. Insulated floor plates and roller covers protect the motors from extremes of temperature.
The dynamometer base frame can be mounted on a moving carriage to provide wheelbase adjustment to accommodate different vehicles. Roller centres can be set automatically as part of the road load model information, or set to the user’s specific dimensions.
The dynamometer is provided with a real-time control processor, distributed I/O architecture and a GUI processor with a Windows 10 operating system. A powerful data logger can store system and vehicle parameters. A real-time graphics package can display this information on screen.
A central server function and host computer interface are available to enable data to be passed in either direction.