Electronic fuel injection diesel engines improve fuel economy by precisely controlling the injection timing, injection quantity, and injection pressure to achieve more thorough atomization and combustion of fuel. Compared with traditional diesel engines, their fuel economy can usually be improved by about 15% -25%. The following is a specific analysis:

Optimizing the fuel injection process: Traditional diesel engine fuel injection systems rely on mechanical devices, with limited injection accuracy, making it difficult to accurately adjust the fuel injection quantity and timing according to the real-time operating conditions of the engine. The electronic control system of electronic fuel injection diesel engines can accurately calculate and control the injection timing and quantity based on various parameters such as engine speed, load, and water temperature. For example, under partial load conditions, the electronic fuel injection system can accurately reduce the fuel injection amount and avoid fuel waste. In contrast, traditional diesel engines may experience a decrease in fuel economy due to excessive fuel injection. According to tests, electronic fuel injection diesel engines can achieve a 10% -15% improvement in fuel economy under certain operating conditions solely through precise fuel injection control.

Improving combustion efficiency: Electronic fuel injection diesel engines can achieve higher injection pressure, allowing fuel to be more fully atomized and mixed more evenly with air, thereby promoting more complete combustion. The combustion process of traditional diesel engines is relatively insufficient, and some fuel is discharged before it is completely burned, resulting in energy loss. By optimizing the combustion process, electronic fuel injection diesel engines can significantly improve the utilization of fuel energy, generally increasing combustion efficiency by about 8% -12%, which directly translates into an improvement in fuel economy.

Accurate idle control: Under idle conditions, traditional diesel engines may experience unstable fuel consumption because mechanical speed control devices are difficult to accurately maintain the minimum stable speed. Electronic fuel injection diesel engines can precisely control the fuel injection amount during idle through an electronic control unit, keeping the engine running at the lowest stable speed and reducing unnecessary fuel consumption. Research has shown that at idle speed, electronic fuel injection diesel engines can save around 15% -20% of fuel compared to traditional diesel engines.

Multi mode fuel injection strategy: Electronic fuel injection diesel engines can adopt various fuel injection strategies according to different operating conditions, such as pre injection, main injection, and post injection. Pre spraying can improve the conditions in the early stages of combustion, reduce combustion noise and nitrogen oxide emissions; Rear spraying helps to further oxidize incompletely burned hydrocarbons and improve combustion efficiency. This multi-mode fuel injection strategy can effectively improve fuel economy under complex operating conditions, and overall can reduce fuel consumption by about 5% -8%.