Can you give any ideas about brake torque produced by car

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SUMMARY

The discussion centers on brake torque in ABS simulations, specifically questioning the appropriateness of a brake torque value of 1000 NM. The results indicate that a car can stop from 180 km/h in approximately 5 seconds, which is plausible under certain conditions. Key factors affecting braking performance include the coefficient of static friction between tires and the road, as well as the brake hydraulic limits. The use of ABS allows for optimal braking without wheel lock-up, enhancing vehicle control during emergency stops.

PREREQUISITES
  • Understanding of ABS (Anti-lock Braking System) functionality
  • Knowledge of static friction and its impact on braking performance
  • Familiarity with vehicle dynamics and braking force calculations
  • Experience with simulation tools for automotive engineering
NEXT STEPS
  • Research the principles of ABS and its effect on braking efficiency
  • Learn about calculating the coefficient of static friction for different tire and road combinations
  • Explore vehicle dynamics simulations using software like MATLAB or Simulink
  • Investigate braking force distribution and its impact on stopping distances
USEFUL FOR

Automotive engineers, simulation developers, and anyone involved in vehicle performance analysis and ABS system design will benefit from this discussion.

Veeveewt
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I m doing ABS simulation, now I just wonder that how much break torque that brake pressure can produce,,, in my simulation I used about 1000 NM, I don't know is it too much?
However, the result shown that car will stop from 180km/hr in abt 5 s,,,Is it make sense?

Between, in the my code, I didnt input the limited of working of brake hydraulic.
 
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Braking distance (&time) is typically limited by your coefficient of STATIC friction between the tires & the road. The brakes are capable of generating more frictional force than the tires, resulting in the wheels locking up. Locked tires then SLIDE down the road, resulting in less friction.

ABS reduces the breaking pressure to slightly below that required to lock the wheels (pressure fluctuates, not constant), ensuring the wheels keep turning & you can steer the car.

If checking your simulation for 'reasonable' results, choose a test vehicle, get the basic product information (mass, braking distance), back-calculate the coefficient of friction for the tires, and use that as your limit.

10x braking force does not equal 10x faster braking :(
 
Such a vague question really, but I figure that my 2750lb car can deploy a maximum of 2200lbs of brake force to the road on high performance road tyres, with around 75lbs of pedal force. This is good to go from 180kmh to 0 in 6.3 seconds.
 

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