What is the difference between electronic fuel injection and direct injection in cars?

1 Answers
NovaFitz
07/30/25 3:42am
The difference between electronic fuel injection engines and direct injection engines lies in the way throttle opening is controlled. Direct injection engines control fuel injection based on engine speed, where the throttle opening is manually adjusted via a throttle knob and the power mode switch, resulting in a relatively simple overall structure. On the other hand, electronic fuel injection engines detect various signals such as throttle opening rotation angle, power mode switch, engine speed, fuel pump pressure speed, pilot control valves for each operation valve, excavator working mode, as well as water temperature and oil temperature signals. The engine control unit (ECU) then calculates and controls the fuel injection based on the driver's operational intent.
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