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Off-Road Chapter 6 - Chapter 6 Engine Design General...

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1 Chapter 6 Engine Design General Considerations The first step in designing a new engine is to choose the desired rated power output and rated speed. The load factor must be considered in choosing the speed. Load Factor = Average Power Output Maximum Power Output General Considerations con’t Engines in tractors, heavy-duty trucks, and other working vehicles have a much higher load factor than automotive engines. An automotive engine typically uses only a small fraction of its maximum available power while cruising at typical speeds on a highway, but may need to accelerate the engine to very high speed and use maximum power for brief periods.
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