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How does compression ratio affect petrol brake power? 


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The compression ratio has a significant impact on petrol brake power. Increasing the compression ratio can lead to improvements in brake power . Experimental and theoretical investigations have shown that as the compression ratio increases, brake power improves . Additionally, simulations have demonstrated that higher compression ratios result in higher in-cylinder pressure and heat release rate, leading to increased brake thermal efficiency . The effect of compression ratio on brake thermal efficiency has also been analyzed using a fixed compression ratio engine, and it has been found that reducing the compression ratio at full load while keeping it sufficiently high for good starting and part load conditions can improve brake thermal efficiency . Therefore, increasing the compression ratio can have a positive impact on petrol brake power and brake thermal efficiency.

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The provided paper is about the effect of compression ratio on the performance, combustion, and emission from a diesel engine using palm biodiesel. It does not provide information about the effect of compression ratio on petrol brake power.
The provided paper is about the effect of compression ratio on energy and emission performance of a diesel engine fueled with Karanja biodiesel. It does not discuss the effect of compression ratio on petrol brake power.
The compression ratio affects petrol brake power in a positive way. As the compression ratio increases, the brake power of the engine also improves.
The paper states that increasing the compression ratio in a spark-ignition engine leads to modest increases in brake engine performance. However, it does not specifically mention the effect of compression ratio on petrol brake power.

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