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Abstract

When fuel injections into Otto-engines are carried out, pressure pulsations occur in the entire fuel injection system. These prevent detailed information about the fuel injection to be deduced from the pressure signals measurable in the system. When specially designed dampers for these pressure pulsations are employed, pressure difference signals over the pulsation damper can readily be employed for instantaneous volume flow rate measurements. Furthermore, the inserted pressure pulsation dampers also allow the pressure reduction in the Common-Rail, due to the fuel injections, to be employed to measure the instantaneous fuel injection volume flow rates, in running Otto-engines. The authors' development work in this field is described in this paper and results of verification measurements are presented.

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