Automatic calibration of internal combustion engine parameters 3-axis
Cars manufacturers interest in both reducing costs and development time of their products is growing. A possible improvement can be given by applying optimization techniques to the automatic calibration of ECUs.
The test environment used to implement the proposed automatic calibration system can be described as follows:
- the engine and test bench controllers (connected to the engine and to bench transducers/actuators respectively) are implemented by using CompactRIO devices, properly programmed and equipped with FPGA boards;
- signals are sent from the CompactRIO, through an Ethernet connection, to two host PCs (equipped with Windows 7 operating system) which acquire, store the data and set up the operating parameters. The interfaces developed by Alma Automotive provide a simple way to interact with the system;
- modeFRONTIER is installed on the host PC connected to the engine controller.
In a typical working condition the engine runs on a steady operating point (identified by load and revolution speed); measures from the sensors are sent, via the CompactRIO device to the destination PC. Then modeFRONTIER can act on the engine controller (i.e. the ECU) in order to optimise the chosen target.
A more complex and meaningful experiment to test the effectiveness of the system is the fuel-film automatic compensation. The idea is to use modeFRONTIER algorithms to identify in real-time the value of the X and Tau constants in order to compensate the fuel-film dynamics.