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Inertial Power
Maximum Repeatability
Due to its characteristics, inertial measurement is highly repeatable. The acceleration is always the same since it depends only on inertial mass. On roller dynamometers, as long as certain parameters remain constant - such as temperature and tire pressure, engine cooling, and test cabin ventilation - the runs will repeat with extremely high precision. On engine dynamometers, maintaining this repeatability is even easier since power transmission is more direct.
Getting Real
It's one thing to talk about the measurement method and another to discuss how the electronic system and software can read the information generated by that measurement. This involves various parameters like sampling frequency and precision of measurements and sensors. It's a balance, sometimes a compromise between improving one parameter at the expense of another.
The Design
The Recipe
This is where we differentiate ourselves from other measurement systems. The choice of sensor type, measurement timing, algorithms used to transform these measurements into real physical values of rotational acceleration, and from there processing this data to obtain RPM, Torque, and Power. The ingredients are the same for all data acquisition system manufacturers, but the recipe and preparation is where we differ from each other. We prepare a Michelin-star restaurant dish at McDonald's prices.
The Ingredients
The acquisition system consists of 3 elements: the sensor, the electronic interface that captures data from the sensor and transfers it to the computer, and the software that takes this raw data and processes it to display it to the user in the most useful and simple way possible, making it easy to digest.
The Support
Washing the Dishes
In every good restaurant, as in every mechanical workshop, there's work that the customer doesn't see and often takes the most time and care - customer service. Our customer service is how it should always be: personalized, direct, one-on-one. We know you don't read manuals. We don't either. That's why we upload videos, maybe fewer than we should, but we're trying to improve. Meanwhile, we respond to your WhatsApp messages, resolve your doubts, and send you the link to the manual page you need to read.
The Fly in the Soup
Sometimes unfortunately a fly falls in the soup. And it doesn't have to be the end of the world - not as long as you can quickly call someone who will help you solve the problem.
We first listen to your complaints, and after those minutes of venting, we help you find the fault. We'll ask you many questions, request photos and videos to try to diagnose the problem. We'll also ask if you've already tried solving it by turning the equipment off and on. But we'll always be there accompanying you until we find the solution.
Real Applications
Who is it for?
This kit works on roller dynamometers and inertial engine dynamometers. Installation is very simple - it's just 1 rotation sensor that works with a magnet mounted on the roller or flywheel, and that's it. If you want to know more about installation, you can consult the online manual.
There are no power limitations. It's the same electronic device and software for both a 10 HP test bench and a 1000 HP one.
The Real Limits
So the true limits aren't imposed by the system, but are defined by the inertial mass of the roller or flywheel in conjunction with the rotation speed. At higher rotation speeds, we'll need less inertia. We take the roller or flywheel weight as a secondary variable that will depend on the measurements, which in turn depend on the desired moment of inertia.
Geometry has a big influence. What we're looking for is a roller or flywheel that has most of its weight concentrated on the periphery, which is where it causes the most moment of inertia.
What Can I Measure?
You can measure power, torque, rpm, acceleration times, as well as additional connected sensors like lambda probe or pressures. The system also performs climate correction, so you'll have power and torque values corrected and normalized by the SAE Correction Factor. We can also measure friction losses, which allows us to estimate the power output from the engine on rollers, not just the power that reaches the wheel.
Typical uses are inertial dynamometers for motorcycle and kart engines, roller dynamometers for motorcycles and karts, roller dynamometers for cars or pickups, even 4x4s by connecting 2 sensors. There are also users who have built larger inertial engine dynamometers of more than 100 HP.
