Ideal torque vs engine speed curve

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SUMMARY

The ideal torque vs engine speed curve varies significantly based on the application, with no universal 'ideal curve' existing. Engine manufacturers provide technical data, including specific fuel consumption curves, which indicate optimal RPM for various loads. The discussion emphasizes the importance of analyzing power curves alongside fuel consumption curves to determine suitable transmission types. Low-end torque is advantageous for trucks, while a quick drop-off is preferable for race cars, highlighting the need for tailored optimization based on vehicle purpose.

PREREQUISITES
  • Understanding of engine performance metrics, including torque and power curves.
  • Familiarity with specific fuel consumption (SFC) analysis.
  • Knowledge of gear ratios and their impact on vehicle acceleration.
  • Basic concepts of traction control and tyre slip dynamics.
NEXT STEPS
  • Research the relationship between torque curves and specific fuel consumption in automotive engines.
  • Explore the effects of gear ratios on acceleration through practical examples.
  • Study the principles of traction control systems and their impact on vehicle performance.
  • Examine various engine optimization strategies for different vehicle types, such as trucks versus race cars.
USEFUL FOR

Automotive engineers, performance tuners, and enthusiasts seeking to optimize engine performance and understand the dynamics of torque and acceleration in various vehicle applications.

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Just a simple question of what the ideal torque/engine speed graph would like?

Also, could anyone direct me to a good website or book that would help me understand the following things better:
tyre slip/traction control
gear ratios and how they affect acceleration
 
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It is easy enough to Google them. All engine manufacturers publish technical data on their engines, including a number of curves. I’m normally most interested in the specific fuel consumption curves. That tells me at what rpm I want to run the engine for various loads. Normally, the emissions curves will also be optimized at approximately the same place. I look at the power curves and compare them with the fuel consumption curves. That tells me what sort of transmission I need. The torque curves don’t provide me much that I don’t get from the other curves, and are less useful.
 
There is no 'ideal curve' only ones optimised for different uses. One with lots of low down torque that drops off quickly would be ideal for a truck, but not a race car, and visa versa.

Here is a great link for explaining the effects of torque and gear ratios on acceleration with lots of great graphics. http://robotpig.net/__automotive/power-torque-thrust.php?page=1
 

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