scholarly journals GPIO-based rail pressure control for diesel high pressure common rail injection system

2019 ◽  
Vol 2019 (22) ◽  
pp. 8293-8298
Author(s):  
Jiapeng Wang ◽  
Hao Sun ◽  
Chen Dai ◽  
Shihua Li
Keyword(s):  
High Pressure ◽  
Pressure Control ◽  
Common Rail ◽  
Injection System ◽  
Rail Pressure ◽  
Common Rail Injection System ◽  
Rail Pressure Control ◽  
Common Rail Injection ◽  
High Pressure Common Rail

Laboratory Testing of a High-Pressure Common Rail Injection Systems

2015 ◽  
Vol 799-800 ◽  
pp. 560-564 ◽  
Author(s):  
Petr Starý ◽  
Josef Popelka
Keyword(s):  
High Pressure ◽  
Laboratory Testing ◽  
Common Rail ◽  
Inlet Pressure ◽  
Injection System ◽  
System Monitoring ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
The Relationship ◽  
High Pressure Common Rail

This article deals with the general issues of laboratory testing of high-pressure common rail injection system. Monitoring the movement of the needle and dynamic pressures is of great importance for further research, which will investigate the relationship between the movement of the lifting solenoid and the dynamics of the inlet pressure. At the same time we examined the possibility of operation for biofuel.

Instantaneous torque, energy saving and flow rate ripple analysis of a common rail pump equipped with different delivery-pressure control systems

2017 ◽  
Vol 19 (10) ◽  
pp. 1036-1047 ◽  
Author(s):  
Alessandro Ferrari ◽  
Ruggero Vitali
Keyword(s):  
High Pressure ◽  
Energy Saving ◽  
Flow Rate ◽  
Control Strategy ◽  
Pressure Control ◽  
Common Rail ◽  
Injection System ◽  
Rail Pressure ◽  
High Pressure Pump ◽  
Rail Pressure Control

A mechanical model of a high-pressure pump of a common rail fuel injection system is presented and validated by comparison with experimental instantaneous pump shaft torque and pump piston lift data. The instantaneous torque has been measured with a high-performance torque meter installed on a hydraulic rig for testing pieces of injection apparatus. In the model, the mechanics of the piston plunger and the forces exchanged between pistons and cam are simulated, and friction losses between mobile parts are taken into account. The numerical tool is used to investigate the dynamical performance of the high-pressure pump and to analyse the impact of the rail pressure control strategy on instantaneous torque, energy saving and flow rate ripple. The rail pressure control strategy, based on the application of a fuel metering valve at the pump inlet, gives rise to an improved hydraulic efficiency of the injection system at part loads and to a moderate rate of pressure increase in the pumping chamber at part loads. However, the rail pressure control strategy based on the installation of a pressure control valve at one rail extremity leads to a reduction in the pump flow rate ripple and to a diminution in the fatigue stress. Furthermore, cavitation problems can occur during intake and early compression phases of the pump cycle when the fuel metering unit is working.

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