Dual-Port Fuel Injection (DPFI)
The important aspects of fuel injection are two fold: where to inject and how strong, and how atomized, the injection should be. The location, pressure, and pattern of injection determine the ratio by which the fuel mixes with the air; if it mixes well, its stable combustion can improve fuel economy and reduce the emission of harmful gases. To this end, Hyundai Motor Group has worked to discover and select the optimal injection pattern for every engine.
MPi engines structurally inject the fuel into the intake ports, so it is essential, for the sake of fuel economy and emission reduction, to minimize the amount of wall film that sticks to the ports or the combustion chamber walls.
DPFI uses two injectors for each intake port to better maintain the stable air/fuel ratio in the mixer, which also improves the EGR (Exhaust Gas Recirculation) ratio, with benefits to the fuel economy. In addition, further atomization of fuel droplets mitigated spray evaporation, which reduced the emission of harmful particulate matter (PM).
The important aspects of fuel injection are two fold: where to inject and how strong, and how atomized, the injection should be. The location, pressure, and pattern of injection determine the ratio by which the fuel mixes with the air; if it mixes well, its stable combustion can improve fuel economy and reduce the emission of harmful gases. To this end, Hyundai Motor Group has worked to discover and select the optimal injection pattern for every engine.
MPi engines structurally inject the fuel into the intake ports, so it is essential, for the sake of fuel economy and emission reduction, to minimize the amount of wall film that sticks to the ports or the combustion chamber walls.
DPFI uses two injectors for each intake port to better maintain the stable air/fuel ratio in the mixer, which also improves the EGR (Exhaust Gas Recirculation) ratio, with benefits to the fuel economy. In addition, further atomization of fuel droplets mitigated spray evaporation, which reduced the emission of harmful particulate matter (PM).