Calculating Torque Absorbed: Vehicle Deceleration from 100 km/hr to 50 km/hr

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  • Thread starter Thread starter sulhil
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    Inertia Torque
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Discussion Overview

The discussion revolves around calculating the torque absorbed by a vehicle's differential gear during deceleration from 100 km/hr to 50 km/hr. Participants explore the relationship between torque, vehicle mass, and acceleration, while considering the mechanics involved in the deceleration process.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant questions how to calculate the torque absorbed by the differential gear during deceleration, drawing a parallel to a flywheel scenario.
  • Another participant suggests that without additional data about the vehicle setup, it is impossible to answer the question.
  • A participant emphasizes the need to know the mass of the car and the gear ratio to proceed with calculations.
  • One participant claims to have the weight of the vehicle and the gear ratio, seeking further guidance on calculations.
  • Another participant states that without additional data, no calculations can be performed.
  • A formula is proposed relating acceleration to torque at the wheels, wheel radius, and mass of the vehicle.
  • Participants seek clarification on the formula and its components, specifically regarding the mass of the vehicle and the correct arrangement of terms in the equation.

Areas of Agreement / Disagreement

Participants generally agree that additional data is necessary for calculations, but there is no consensus on the specific calculations or the correct formulation of the relationship between torque, acceleration, and mass.

Contextual Notes

Limitations include the lack of specific values for vehicle mass, gear ratio, and other parameters necessary for accurate calculations. The discussion also reflects uncertainty regarding the correct application of the formula proposed.

Who May Find This Useful

This discussion may be useful for individuals interested in vehicle dynamics, mechanical engineering, and those looking to understand the relationship between torque and vehicle deceleration.

sulhil
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a vehicle is moving at 100 km/hr. the foot is lifted off the accelerator, and the vehicle decelerates, if a mechanism is introduced to absorb the toque from the differential gear(bevel ring gear). and it decelerates the vehicle from 100 km/hr to 50 km/hr. what would be the amount of torque absorbed.

it is kind of a similar scenario where a flywheel under motion is decelerated and torque is produced.
in the vehicle scenario am not sure how to use the moment of inertia
 
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I think without additional data about the setup, it is impossible to answer the question.
 
well let's say a vehicle is moving at 100 km/hr, and the foot is raised off the accelerator, it is leveled road . and the vehicle is aloved to decelerate. at this point the bevel ring gear of the diffrentil of the vehicle would still countinue to rotate as the wheels are rotating. how could i find the torque of the rotating bevil ring gear ??
 
You need to know the mass of the car and gear ratio.
 
well i do have the weight of the vehicle as well as the gear ratio

could u give me some calculations i could use ??
 
Without additional data, there is nothing you could use in a calculation.
 
Acceleration = torque at the wheels / wheel radius / mass
 
could u please elaborate a bit more, as in its the acceleration of the vehicle we r toking here, and is it the mass of the vehicle itself tht we are talking ??
 
  • #10
thanks a lot for ur input, could u give me any reference to the formula u have supplied me with ,
and is it
acceleration = [torque at the wheels/wheel radios]/mass
or
acceleration= torque at the wheels /[wheel radios/mass]
 

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