Tailor-made fuel pre and main filter combination for modern diesel engines in the commercial sector

S. Pietschner, G. Mathy, M. Dorschel, A. Heinen*, Hengst SE & Co. KG, Germany

The requirements for modern diesel engines with respect to low fuel consumption, high performance and reduced pollutant emissions are continuously increasing. Thus, the requirements with regard to the functionality of the required fuel filter systems have also increased. In addition to the particle filtration function, filter service life and water separation function for widely divergent fuel qualities throughout the world, modern systems also have to meet the most demanding installation space requirements.

The fuel filter located downstream of the low-pressure fuel pump, the so-called main filter, usually must fulfill both tasks: particle filtration and water separation. In many applications there is an additional pre-filter integrated in the fuel supply system to protect the low-pressure pump. There are also solutions in which the water separation functionality is handled by the pre-filter. Normally, the pre-filter and the main filter are considered separately by the vehicle manufacturers. However, a balanced design of the pre-filter and the main filter provides a huge potential regarding a better filter performance.

It is illustrated, how the functions of suction-side pre-filters with those of the pressure-side main filters can be combined in practice in order to achieve optimum filter results. ...

Session: L16 - Fuel Filtration I - Water Separation
Day: 13 October 2016
Time: 10:45 - 12:00 h

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