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1 Journal of Polish CIMAC

1 2009

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Effect Of Supply Voltage On The Dosage Fuel In Injection System The Common Rail Type

Lejda K., Ustrzycki A.

Journal of Polish CIMAC

2009

Vol. 4, no 2

169-176

Common Rail systems are most frequently used solution to the fuel supply system of Diesel engines. This is due to their high potential to shape the characteristics of fuel injection. One of the important requirements for each injection system is precision dose control and its onset, that is, as a consequence of the start of the combustion process. The most important parameters affecting the accuracy of dosing injection systems are, of course injection time, pressure of fuel in the rail and the fuel temperature. Influence on the size of the dose but also other factors, which include the supply voltage, which may be subject to significant change during the start-up of engine. The issue of start-up is becoming of interest to EURO standards, as the processes occurring in the course have a significant impact on the level of pollutants in the exhaust of internal combustion engine. Increased in this period, emissions of toxic compounds results from the unstable processes in the engine cylinder, as well as dynamic changes in the parameters of injection and in the start-up system, in particular, changes in voltage resulting from a large collection of current from the battery. Thus, the article attempted to determine the impact of voltage supply on the dosage of fuel in different operation conditions of the injection system. In particular attention was paid to the size of the dose and the actual changes at the beginning of fuel injection voltage changes. The study was conducted on a test stand, which were the main components of the test bench Bosch EPS-815 with electronic measurement of fuel dose and the visualization system AVL Visioscope. Control of the injector was performed using the self-developed controller.