Direct injection is considered better because it offers improved performance and efficiency, primarily due to its ability to inject a cooler air/fuel mixture into the cylinder.
How Direct Injection Works
In a direct injection system, fuel is injected directly into the engine's cylinder, unlike traditional port injection where fuel is sprayed into the intake manifold. This key difference leads to several advantages.
Benefits of Direct Injection
Here's a breakdown of why direct injection is superior:
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Cooler Air/Fuel Mixture: According to the reference, the most significant advantage of direct injection is that it injects a cooler air/fuel mixture into the cylinder.
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Higher Compression Ratio: The cooler mixture allows for a higher compression ratio. As the reference states, "First, it enables a higher compression ratio which offers higher performance and efficiency."
- A higher compression ratio means that the air/fuel mixture is compressed more before ignition, leading to more power and better fuel economy.
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Improved Performance and Efficiency: The combination of a cooler mixture and higher compression ratio results in enhanced engine performance and overall efficiency.
In essence, direct injection provides a more controlled and efficient combustion process compared to traditional fuel injection methods.
