Characterization of the Rate of Injection of Diesel Solenoid Injectors Operated in the Multiple Injection Strategy: A Comparison of the Spray Momentum and Bosch Tube Methods

Multiple injection strategies can be used for controlling the heat release rate in an engine, particularly compression ignition engines. This mitigate transfer losses and overcome limitation related to maximum pressure allowed a particular engine. Controlling with repetitive injections requires precise characterization of fuel rates. In such configuration, injector should characterized its hydraulic delay, injection, effect dwell timing multiple injections. study investigates behavior high-flow-rate solenoid operated single double Two methods, momentum flux, Bosch tube are compared investigate their suitability strategies. Experiments conducted by varying Energizing Timing (ET) from 0.5 up 2 ms. The tests (i.e., injections) fixed ET ms, while times (δt) varied 0.1 1 All performed at 500, 1000, 1500, 2000 bar rail pressures. Depending on pressure, injector’s needle could not fully close short merged. flux method has faster ramp-up decaying more oscillations quasi-steady-state phase method. effective duration is overpredicted demonstrated suitable measuring ROI