How to calculate the max acceleration

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Discussion Overview

The discussion revolves around calculating the maximum acceleration and maximum power of a vehicle powered by a specific engine. Participants explore the necessary parameters and assumptions required for these calculations, touching on theoretical and practical aspects of vehicle dynamics.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant presents engine specifications and seeks guidance on calculating maximum acceleration and power.
  • Another participant questions the source of the specifications and the meaning of "engine-wheel efficiency."
  • A third participant notes that maximum acceleration is dependent on the friction coefficient of the tires, which is not provided, thus making it impossible to calculate without that information.
  • This participant also calculates the power output at a specific RPM but raises uncertainty about whether that RPM corresponds to maximum power.
  • A fourth participant references a previous analysis of a four-cylinder engine, suggesting it may provide relevant insights.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the calculations due to missing information, particularly regarding tire friction and the relationship between RPM and power output. Multiple competing views and uncertainties remain in the discussion.

Contextual Notes

Limitations include the unspecified friction coefficient of the tires and the lack of clarity on whether the provided RPM is where maximum power occurs. These factors affect the ability to calculate maximum acceleration and power accurately.

Who May Find This Useful

Individuals interested in vehicle dynamics, engine performance analysis, and those seeking to understand the relationship between engine specifications and vehicle acceleration.

Ketan Vadher
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I have an engine with the following specifications:
305 cc, 4-stroke single-cylinder.
Torque : 18.53 N m @ 2800 rpm.
Weight of the car 275kg
Coefficient of drag:1.15
Frontal area: 0.9177m^2
Rolling resistance:0.04482
Engine wheel efficiency: 78%

How can i calculate the Max. acceleration and Max. Power ?
 
Engineering news on Phys.org
With difficulty.
Where is all this coming from? Does that source also tell you the power output of the engine for it's standard fuel mix?
What does "engine-wheel efficiency" mean?
 
The maximum acceleration will depends on the friction coefficient of the tires. Since you didn't specify it, you cannot find it.

For the maximum power all you know is that you have 5433 W @ 2800 rpm (= 18.53 * 2800 * π / 30). Is this the rpm where you have the maximum power? No one can say from the information you gave.

More info here about estimating the acceleration of a vehicle.
 
I calculated A Four-Cylinder Internal Combustion Engine last year. It includes heat analysis and speed characteristics. It can help.
 

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