Baja Drive Line Test Development

This paper discusses the development and setup of a test facility to model the performance of the Briggs and Stratton Model 20 engine, used in the SAE Baja competition. The test platform is integrated with sensors to measure various engine parameters including horsepower, torque, RPM, an assortment of temperatures, intake air flow rate, fuel flow rate, cylinder pressure, and air/fuel ratio measurements. The system employs a DC motor as the dynamometer, a dynamometer controller to provide controlled load to the engine, sensors, and data acquisition hardware. All measured parameters were within range of expected results and theoretical estimates. A repeatability and reliability assessment of the system was not conducted due to time constraints and limited availability of the test facility; however all sensors were tested and validated. Certain physical design requirements included the ability to adapt the engine to the DC motor via a drive system, ability to tilt the engine, robustness, and safety. All design requirements were met. Limitations in the drive system observed during testing were partly resolved through the design and development phases.