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Why diesel engines need no spark plugs

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Unlike standard engines that use cute little electrical sparks to light fuel, diesel engines rely on pure, unadulterated brute force. They compress the air inside the cylinder so aggressively that the sheer pressure causes the temperature to spike drastically. Once the fuel is injected into this inferno, it spontaneously detonates, which explains why diesels sound like angry tractors.

Why diesel engines need no spark plugs
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