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DYNAPACK CONTROLS THE CAR – NOT THE OTHER WAY AROUND
The theory of operation and the implementation of that theory are actually fairly simple. It took several years and a lot of hard work however to make our dyno as simple as it is today.
The hubs of the vehicle are directly attached to hydraulic pumps. We can apply a variable but precise load with all of the potential holding power that hydraulics possess. The wheels are removed from the vehicle. Our variable fit hub adaptors are bolted to the vehicles axle. The hub adaptor is then directly attached to a hydraulic absorption unit. We can apply a variable but precise load to the axle(s) of the vehicle.
Simultaneously, we are monitoring pressures and measuring hub RPM, so we can determine the amount of work being performed. It sounds easy until you realize that all of these calculations are very complex and are happening very quickly. Add to this, all of the data logging functions and real-time full-color graphics that are also being calculated and you begin to realize that what appears to be simple is actually very complex…being the best is never easy.
Traditionally, most serious engine builders have thought that chassis dynamometers were inferior to the results you could obtain from a quality engine dyno. We have effectively attached engine dyno style load cells to the axles, so we now have the type of precision and repeatability normally associated with an engine dyno, but with the convenience and benefit of having the engine operate in its natural environment – which has enabled many of our customers to see better results than they were getting on their engine dyno
Because we need a precise and powerful loading device, we use hydraulics. We do not use inertia, we do not use eddy currents, air, or friction. Because of the incredible holding power hydraulics offer, we have TOTAL control of the axle speed. Literally.
Want to hold a steady RPM under high power? We can hold an exact axle RPM (+/- one RPM) at any power level – all the way up to the full maximum rated torque capacity of the dyno, CONTINUOUSLY – for as long as you like. If the software allowed it, we could stop the engine within one revolution of the axle – even if the engine is at full throttle at its maximum torque level. Obviously you would not want to do this, and our software prevents it, but it does give you an idea of just how much power and control we have over the axle speed.
Our dyno controls the car – not the other way around. We control the axle speed and rate of acceleration at all times, it allows you to see exactly what the vehicle is doing at any given point in time and RPM of the completed run. Because we aren’t limited by the capabilities of eddy current brakes and similar devices, we open up a whole new world of tuning possibilities. Times change and technology evolves. What was once “industry standard” is now yesterday’s technology. The Dynapack is truly the most technologically advanced chassis dynamometer in the world – at any price.