OPTIMUM WORKING CURVE FOR DIESEL ENGINES

摘要

The optimum working curve (OWC ) provides the optimum torque-speed relation required for the design of a tractor gear selection indicator. Three methods for the determination of the OWC curve for diesel engines were tested. One method, called the model-plus-test, uses a quadratic equation and it was obtained analytically. The last two are linear approximations and they provide good accuracy. They have two advantages over the analytical method: the expressions are simple and they do not require additional engine tests.