This paper presents the development, experimentation, and validation of a reliable and robust system to monitor the injector pulse\r\ngenerated by an engine control module (ECM) which can easily be calibrated for different engine platforms and then feedback the\r\ncorresponding fueling quantity to the real-time computer in a closed-loop controller in the loop (CIL) bench in order to achieve\r\noptimal fueling. This research utilizes field programmable gate arrays (FPGA) and directmemory access (DMA) transfer capability\r\nto achieve high speed data acquisition and delivery. This work is conducted in two stages: the first stage is to study the variability\r\ninvolved in the injected fueling quantity from pulse to pulse, from injector to injector, between real injector stators and inductor\r\nload cells, and over different operating conditions. Different thresholds have been used to find out the best start of injection (SOI)\r\nthreshold and the end of injection (EOI) threshold that capture the injector ââ?¬Å?on-timeââ?¬Â with best reliability and accuracy. Second\r\nstage involves development of a system that interprets the injector pulse into fueling quantity. The system can easily be calibrated\r\nfor various platforms. Finally, the use of resulting correction table has been observed to capture the fueling quantity with highest\r\naccuracy.
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