The high proportion of oil-fired heating systems in the housing stock is of key importance for meeting the climate policy target of reducing CO2 emissions in the heating market. In addition to an energy-efficient and low-emission conversion of fuel heat into heating energy, the demand for an increased use of regenerative liquid fuels (x to liquid, bio-oil) is also derived from this. Of central importance for achieving these efficiency targets is a fuel-flexible, precisely infinitely variable and highly efficient fuel injection system. SUPART has taken the reciprocating piston principle familiar from engine injection technology and developed it further for application in a burner. Numerous concept tests have shown that with such a reciprocating piston pump in combination with a microprocessor-controlled stroke control system, it is possible to achieve an electronic fuel/air ratio with high metering accuracy and minimal electrical energy requirements. The electronics specially developed for this concept are capable of compensating for a wide variety of influences such as fuel viscosity, heating of the drive coil, nozzle tolerances and wear of hydraulic functional elements. This also fulfills the normative requirements for safety-related monitoring of fuel metering over the entire service life of the pump.