RPM simulator supports development of hybrid drives
To operate engine electronics on the test bench, it is necessary to simulate crankshaft and camshaft signals in a phase-stable manner in relation to the test bench drive. In the past, it was sufficient for such simulators to provide correctly simulated angle signals from a certain speed and only in one direction of rotation. However, the specific characteristics of modern engines made correct simulation from zero speed and also in reverse rotation necessary.
The ISIM-G2 can simulate the correct speeds of the crankshaft and camshaft from drive shaft speeds >0.5 rpm and does not lose the phase position of the shafts to each other even at very high speed accelerations. Even at high accelerations the ISIM G2 has a maximum phase error of 0.2 degrees, in standard operation it is less than 0.1 degree.
In the simulation of combustion engine drives, the devices had to process accelerations of 500 or 1000 rpm – with the hybrid drives that are increasingly being used, this is up to 8000 rpm. Maintaining phase rigidity at the same time requires a very fast logic design and software. In addition to inductive and Hall sensors, the ISIM G2 also simulates DG23i sensors which detect the direction of rotation. In start-stop systems, the pump shaft can sometimes rotate backwards when the motor is switched off.
The device is primarily intended for operation on test benches related to injection technology, but can also be used for other fields of application. Thanks to the logic design, the device can in principle simulate up to five completely independent shafts simultaneously, whereby the dependencies of the shafts on each other can be configured. This means that a speed simulation with four individually driven wheels could also be realised.
The web-enabled operating software of the ISIM-G2 allows the device to be operated from any workstation in the local area network via a web browser.
More information: https://www.smart-testsolutions.de/en/products/measurement-and-simulation-technology/speed-tools.html
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