A/F Ratio & BSFC: Q&A to Understand Effects

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SUMMARY

The discussion focuses on the influence of air/fuel ratio on engine output and Brake Specific Fuel Consumption (BSFC). It establishes that a leaner air/fuel ratio typically enhances engine efficiency, while BSFC tends to increase at low engine outputs due to incomplete combustion. As engine output rises, BSFC improves due to more efficient fuel usage. Additionally, the timing of fuel injection significantly affects performance, with early injection generally leading to better combustion efficiency.

PREREQUISITES
  • Understanding of air/fuel ratio dynamics
  • Knowledge of Brake Specific Fuel Consumption (BSFC)
  • Familiarity with engine performance metrics
  • Basic principles of fuel injection timing
NEXT STEPS
  • Research the effects of air/fuel ratio on combustion efficiency
  • Learn about the relationship between engine load and BSFC
  • Investigate the impact of fuel injection timing on engine performance
  • Explore advanced engine management systems for optimizing air/fuel ratios
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Engineers, automotive technicians, and students in mechanical engineering who are looking to deepen their understanding of engine performance and fuel efficiency optimization.

krish1988
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I have few questions as i am bit confused

Q1. I want to know what are the influence of the air/fuel ratio on engine output and Brake specific fuel consumption (BSFC).

Q2. why bsfc increases at low engine output?

Q3. why bsfc improves as engine output increases?

Q4. what are the effects of early and late injection timing?
 
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