Question:
In a tyre axis system as defined by Society of Automotive Engineers, the moment acting about z-axis is called
In a tyre axis system as defined by Society of Automotive Engineers, the moment acting about z-axis is called
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Updated On: Dec 22, 2025
- aligning torque
- over turning torque
- rolling resistance moment
- lateral moment
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The Correct Option is A
Solution and Explanation
The question pertains to the terminology used in the tyre axis system as defined by the Society of Automotive Engineers (SAE). This system is employed to describe various forces and moments that act on a tire due to its interaction with the road surface. Let's explore the options provided and identify the correct term for the moment about the z-axis.
Options Explanation:
- Aligning Torque: This is the correct answer. It refers to the moment about the z-axis, which is vertical to the plane of the wheel in the SAE tyre axis system. The aligning torque is significant because it counteracts lateral forces to keep the vehicle stable, especially during steering maneuvers.
- Over Turning Torque: This typically pertains to moments that may cause a vehicle to tip over. It is not primarily associated with the z-axis in the tyre axis context.
- Rolling Resistance Moment: This term refers to the resistance encountered by the wheel during rolling, usually acting along the x-axis or in the direction of motion, not related to the z-axis.
- Lateral Moment: This refers to the moment that acts in relation to the lateral or side-to-side movements, often associated with the y-axis rather than the z-axis.
Conclusion:
In the SAE tyre axis system, the moment acting about the vertical (z) axis is aptly termed as aligning torque. This aligning moment plays a crucial role in steering dynamics and lateral stability of the vehicle. Therefore, the correct answer is aligning torque.
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