Design and Development of a PWM Generator with Integrated Power Supply for BSVI / BSVII Dosing system

A Direct leap from BSIV to BSVI in 2020 necessitated rapid adaptation by automakers and fuel suppliers. New regulatory standards on engine pollutant emissions have expanded the engine operating conditions subjected to type approval tests, aiming to bridge the gap between regulated and real-driving emissions. The BSVI dosing system, comprising supply and dosing units, is integral to the aftertreatment systems for both on-highway and off-highway applications. This system is crucial for meeting BSVI norms by providing the necessary flow and pressure. Before market introduction, this system must undergo various validation processes. Traditionally, the system relies on a controlled modulated input signal and a closed-loop feedback system developed by manufacturer software. However, this setup was complex, bulky, and requires manual intervention during lab testing validation. To enhance this system, we developed an automated PWM generator with an integrated power supply that dynamically adjusts based on temperature feedback from a climatic chamber, performing simulating to the vehicle condition. Rigorous validation testing demonstrated significant improvements in system stability and efficiency. The automated PWM generator not only simplifies the setup by reducing the need for manual intervention but also enhances the precision of the dosing system under varying environmental conditions. This makes it a robust solution for advanced automotive applications in lab validation tests, ensuring compliance with BSVI norms and improving overall system reliability. This paper focuses on to develop an automated PWM generator to reduce manual intervention and to minimize special software dependability to validate BSVI Dosing system under various temperature conditions.