Torque calculation of CV joint

In summary, the torque calculation of a CV (constant velocity) joint involves understanding the forces acting on the joint during operation. This process includes evaluating factors such as angular velocity, load conditions, and the geometry of the joint. The torque is essential for ensuring proper functionality and durability of the joint, as it affects the performance of the vehicle's drivetrain. Accurate calculations help in designing joints that can handle expected loads while minimizing stress and wear.
  • #1
Gozupa
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Thread moved from the technical forums to the schoolwork forums
TL;DR Summary: help with assignment: find CV joint torque in 3 different situations

Hi, I need help for my assignment. I need to calculate torque of CV joint of truck in 3 cases:
a) CV joint torque on take off
b) CV joint torque on take off on a slope in reverse
c) CV joint torque while driving on straight asphalt road
1714148264329.png

i've found formula (a) in one of my textbooks, but i'm not sure it's correct one. I don't know how to calculate (b) or (c) tbh.
 
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  • #2
Welcome, @Gozupa !

It is impossible to help you with such limited information.
Are you asked to compare torque values or to calculate them?

CV joints are mainly used in front-wheel drive light vehicles.
Is your truck of that type?

That is important to know in order to properly answer the questions because the maximum possible force of friction between the tires and the asphalt determines the maximum torque that the engine's power can transfer to the wheels via the CV joints.

Once one wheel reaches that limit and starts spinning in place, the transmitted torque on the CV joint is greatly reduced due to lack of resistance from the asphalt.

For each case:
a) On take off: There is more weight (or normal force associated to friction) on the rear wheels than on the front ones.
b) On take off on a slope in reverse: There is more weight (or normal force associated to friction) on the front wheels than on the rear ones.
c) On straight asphalt road: There is about the same weight (or normal force associated to friction) on the rear wheels and on the front ones.
 
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  • #3
Lnewqban said:
c) On straight asphalt road: There is about the same weight (or normal force associated to friction) on the rear wheels and on the front ones.
At constant speed, that is.
 

FAQ: Torque calculation of CV joint

What is torque in the context of a CV joint?

Torque in the context of a CV (Constant Velocity) joint refers to the rotational force applied to the joint that enables it to transfer power from the engine to the wheels while allowing for movement and flexibility in the drivetrain. It is crucial for the performance and efficiency of the vehicle's power delivery system.

How do you calculate the torque applied to a CV joint?

The torque applied to a CV joint can be calculated using the formula: Torque (T) = Force (F) x Distance (r), where Force is the axial load applied to the joint and Distance is the perpendicular distance from the axis of rotation to the line of action of the force. Understanding the specific forces acting on the joint during operation is essential for accurate calculations.

What factors affect the torque calculation of a CV joint?

Several factors affect the torque calculation of a CV joint, including the design of the joint, the materials used, the angle of articulation, the load conditions (such as acceleration and braking), and the friction present within the joint. Additionally, the speed of rotation and any external forces acting on the drivetrain can also influence the torque experienced by the CV joint.

Why is it important to calculate torque for CV joints?

Calculating torque for CV joints is important to ensure that they can handle the required loads without failing. Proper torque calculations help in selecting the right joint design and materials, ensuring durability, performance, and safety in vehicle operation. It also aids in diagnosing issues related to drivetrain performance and wear.

What tools are commonly used to measure torque in CV joints?

Common tools used to measure torque in CV joints include torque wrenches, torque sensors, and dynamometers. These tools help provide accurate measurements of the torque applied to the joint during testing or operation, allowing engineers and technicians to assess performance and make necessary adjustments.

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