Sure!. The general rule for the Low-Pass-Filter (the one that is set in seconds) is that the filter size shouldn’t be bigger than the test duration / 10 (the acceleration part). As a general rule an inertial dynamometer shouldn’t produce acceleration tests of less than 5 seconds (at the suitable gear), then the minimum filter …
MSCOMCTL.OCX and SPView41.OCX errors A few customers reported errors when installing the Software at the point when the installer is registring some OCX controls. For instance the MSCOMCTL.OCX there are two versions, in old Sportdyno V3.5 we used the version (6.01.9782) where in current Sportdyno versions we use a more recent version (6.01.9846) and for …
Each power supply comes with 3 inputs: PWM (2 pins), CAN (4 pins) and Analog / Potentiometer (3 pins). In general only one can be used at a time for the speed control (PWM or CAN), with the exception of a safety potentiometer or brake pedal that can work in parallel as a safety control …
Inertial tests: it is common that the longer the test (higher gear) the more power that the engine can develop, this happens for two reasons: Braked tests: Both issues are considerably attenuated when performing braked tests of a same duration. Additionally, In twin roller dynos there is also another source of differences, which is the …
Despite theis higher complexity and cost, typically braked dynos use Hollow Rollers because the capacity of having longer axles, which are necessary for connecting the rollers between them (car dynos) and with the brake. Car dynamometers can also use hollow rollers for inertial dynos because it is necessary to connect them in pairs. Advantages of …
P.I.D. coefficients determine the brake response to the difference between the desired speed (target) and the current speed (this difference is called error).The DAQ (SP1+ / SP5 / SP6) implements a standard PID, with I constant proportionally to P (Kp) Ti, this allows changing only Kp constant and SP5 will modify Ki to keep …
In an inertial dyno RAW power (power observed at rollers) is basically the same as the Wheel power (power that is available at wheels), with the only exception of the power lost at bearings, which can be ignored. But in a braked dyno using air-cooled eddy current brakes, part of the power is used in …
Differences between RAW power and WHP in braked dynos Read More »
In most cases we need to know an estimation of the Power at Engine, which implies to record the coast down phase: friction losses from tyre losses and air-pump losses from brake mainly. This coast down phase must be recorded with the clutch pressed or the Neutral position selected
Typically we use solid rollers for inertial dynamometers, specially for Motorcycle dynamometers due to its extreme simplicity. They can be used for car dynamometers although the amount of steel to be removed to create longer axles (in order to connect each side roller) may be a bit high, which makes more time and money costly …
Calibration of loadcell, for dyno running with SportDevices SP1+, SP3, SP4, SP5 and SP6 DAQ units.Procedure may be different depending on how the dyno is constructed. In this description there is use “calibration bar” and “Calibration weight”.The purpose of calibrating the load cell is because the load cell normally is the most important factor in …
