If an ECU has integrated sensors and actuators, you cannot connect the HIL simulator to the ECU directly on the electrical level, unless you open the ECU and access its internal pins. Instead, you have to provide the physical signals to stimulate the ECU's sensors and actuators by other means, for example, via an ECU mounting device or a mechanical test bench. The dSPACE Simulator then provides physical variables from the environment simulation and can additionally simulate any missing components. Not only purely electric tests can be performed: Mechatronic parts such as the steering or the chassis system can also be tested.
As the required stimulation signals vary for each ECU, the HIL test benches have to be designed individually.
dSPACE has years of experience in stimulating integrated pressure, engine speed and temperature sensors, acceleration sensors, and yaw rate sensors for integration into HIL systems.