On the Modeling of Single-Piston CR Pump
2022-01-0608
03/29/2022
- Event
- Content
- The injection strategy as well as the overall efficiency of the diesel engine are tightly related to the performance of the high-pressure injection pump. The paper deals with the modeling of a latest generation Common Rail injection pump, aiming at the characterization of its performance in terms of volumetric- and torque-efficiency. A lumped parameter approach is adopted; with reference to a commercial pump widely used in the field of light diesel engines, a dynamic model of the piston-cylinder pair is built, taking its mechanical drive, the hydraulic supply and delivery systems into account. Based on in-depth experimental activities that provide the diagrams of pump operation cycles, the lumped-parameter model is validated. Given the current strong interest in the use of alternative fuels that limit CO2 emissions, the pump model has been implemented to simulate, beside the standard diesel, the use of biofuels, and to evaluate their impact on pump performance. Then, simulation campaigns are conducted exploring the behavior of the pump in the typical operating conditions of the engine, providing useful information for defining the pump management strategy and its effect on the overall engine efficiency. Keywords: Injection pump modeling, fuel type, waste cooking oil, volumetric-efficiency, torque-efficiency, pump operation cycle, piston working chamber, diesel, biodiesel
- Citation
- Palmieri, F., "On the Modeling of Single-Piston CR Pump ," SAE Technical Paper 2022-01-0608, 2022, .