Design and Implementation of Heater Control Unit for Passenger car (HCU-PC)

The vehicles are increasing day by day, due to which emission of nitrogen oxide gases are consequently increasing which is leading to the various adverse effects to the life of humankind. NOx gases will cause smog, acid rain and formation of fine particles (PM) which are hazardous to health. NOx gases produced from the reaction of nitrogen and oxygen gases during combustion, especially at high temperatures. In areas of high motor vehicle traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere as air pollution can be significant. The exhaust gas gets treatment before releasing into atmosphere before tail pipe with Adblue liquid (32.5% of urea in water). This liquid reacts with exhaust gas and converts nitrogen oxides into nitrogen and water but the problem is to maintain Adblue liquid to desired temperature mainly in European countries (cold regions). BOSCH has developed heater control unit for passenger cars using Freescale microcontroller, which have only two heater elements i.e. there is no flexibility in current design to add & drive extra heater element. Therefore, this project aims at developing a new RCV-PC, with flexibility on number of heater elements (maximum up to 4) along with more Flash Size for additional feature implementation, less power consumption and low cost compared to the existing RCV-PC. For development, IAR Embedded Workbench for Renesas RL78 (version 1.40.5) is used.