Abstract
This paper presents a method and results, which studies influences of the fuel flow mode on the pressure oscillation in the volumes of the accumulator fuel system. The fuel is supplied through nozzle holes into a constant volume chamber, which is installed a jet for fuel discharge into the low-pressure line. Results show that the increase in the base pressure value of the fuel accumulator leads to the rise in the slope of the leading edge of the differential characteristics and the maximum dQ/dt value changes closer to the beginning moment of the fuel injection process. At the same time, the control pressure value is a significant parameter that greatly influences the shape of the injection characteristic. In addition, when using the drain orifices with different diameters, received values and differential characteristics vary during the fuel supply process. The differential characteristics of the study are the basis for implementing fuel injection control solutions.
Highlights
The diesel engine is still trusted because of its high efficiency, good economy, and large torque, so they are widely used in marine, construction, and agricultural machines, etc. [1,2,3]
This paper presents an experimental method to determine the injection characteristics of the common rail fuel system for diesel engines and a method to analyze the signal received from the experiment
Signals from pressure sensors, which are installed in the fuel accumulator, at the electrohydraulic injector (EHI) inlet port, and in the chamber are recorded
Summary
The diesel engine is still trusted because of its high efficiency, good economy, and large torque, so they are widely used in marine, construction, and agricultural machines, etc. [1,2,3]. The diesel engine is still trusted because of its high efficiency, good economy, and large torque, so they are widely used in marine, construction, and agricultural machines, etc. In order to optimize the operation process for the highest efficiency, the least fuel consumption, and emission, diesel engines are getting more and more control technologies. The diesel engine control system includes intake air, fuel injection, and emission control, etc. To control those system parameters, the sensors receive the working status of the engine and send it to the ECU for processing. Studies have demonstrated that injection pressure has a direct effect on the atomization and mixing efficiency of diesel engines [4,5,6,7,8]. Along with increasing fuel injection pressure, reducing the injector hole diameter helps to reduce soot emissions [10]
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