Operation Cycle of Diesel CR Injection Pump via Pressure Measurement in Piston Working Chamber

The paper is devoted to the analysis of operating cycle a high-pressure injection pump used in common rail systems. investigation based on experimental activities, and it carried out novel set-up that allows measurements instantaneous pressure piston working chamber. A single plunger has been equipped with piezo-resistive transducer which for measurement signal during operation test rig. describes set-up, modified transducer, tests out. Main results obtained using standard commercial diesel fuel are discussed at first; secondly, focus moves use an alternative (biodiesel) whose features terms bulk modulus, viscosity, density significantly differ from reference fuel. Based characteristics cycle, suction delivery processes analyzed, pointing how type reflected them. investigations aimed describing pump, focusing attention those playing fundamental role global efficiency pump. amplitudes pump-work phases, ranges fluctuations, pressure-rise rates quantified reported, providing crucial indications lumped parameter modeling design activities field current generation pumps.