Car randament (engine efficiency)

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SUMMARY

Diesel and Otto cycle engines cannot achieve 100% efficiency due to inherent thermodynamic limitations. The compression of air in these engines results in heat energy loss to the engine block and cooling system, preventing them from reaching theoretical maximum efficiency. The Carnot cycle provides a foundational understanding of these limitations, as detailed in the linked articles.

PREREQUISITES
  • Understanding of thermodynamics and heat transfer principles
  • Familiarity with Diesel and Otto cycle engine operations
  • Knowledge of the Carnot cycle and its implications on engine efficiency
  • Basic grasp of energy loss mechanisms in mechanical systems
NEXT STEPS
  • Read the Wikipedia article on the Carnot cycle for a deeper understanding of thermodynamic efficiency
  • Explore the differences between Diesel and Otto cycle engines in terms of efficiency and performance
  • Investigate methods to improve engine efficiency through advanced materials and designs
  • Study the impact of heat energy loss on overall vehicle performance and fuel economy
USEFUL FOR

Automotive engineers, mechanical engineers, and students studying thermodynamics or engine design will benefit from this discussion on engine efficiency limitations.

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Diesel and otto car cannot have randament of 100 per cent, practically. But teoretically they could have?
 
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Welcome to PF.

Compression of air results in loss of heat energy to engine block and cooling system.
So Diesel or Otto cycle engine will never be 100% efficient.

Note; In Romanian, randament = efficiency.
 
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