Development of a Diesel Common Rail Pump to Meet Future Diesel Engine Applications

Autoren

Bradlee J. Stroia, Ph.D., John A. Pinson, PhD, Stanadyne LLC, Windsor CT, USA

Zusammenfassung

The invention of the diesel common rail (DCR) fuel system has enabled a complete new performance scope for the operation of the Diesel Engine. Among the most important characteristics, the DCR fuel system provides increased fueling flexibility in both quantity and timing, improved packaging, relatively low weight, and attractive cost to the fuel system integrator. Key to the DCR fuel system, is the ability to provide a common fueling pressure to all of the engine cylinders. This is provided via a common fuel rail among the cylinders. In this arrangement, the fueling, timing, and fuel pressure can all be controlled simultaneously for each cylinder, leading to a very flexible fuel control. Looking forward to future fuel system requirements, in this paper, future DCR pump features to allow for improved efficiency, function and performance, size and weight, and cost will be discussed. Key features of a current production DCR pump to meet requirements will be described. Design strategies for fuel metering, robustness to debris, increased pressure, increased speed, and increase in B10 life will be presented in detail. Finally, results from analysis and test will be presented to validate the improvements to the DCR pump to meet future Diesel engine applications.

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