What is the meaning of Ackermann angle?
2 Answers
Ackermann angle refers to the angle formed between the two steering wheels when the vehicle is turning. The following is a detailed introduction about Ackermann angle: 1. Overview: Ackermann angle refers to the angle formed between the two steering wheels when the vehicle is turning. Ackermann refers to the geometric characteristics of the steering system shape, which causes the inner wheel to turn more than the outer wheel when the vehicle is turning. The inner wheel usually turns at a larger angle than the outer wheel. When the steering angle is increased, this angle will also increase accordingly. 2. General situation: Usually, the Ackermann angle is set by changing the fixed hole position of the steering push rod on the steering cup. When the angle of the steering push rod is larger, it will produce more Ackermann angle, and vice versa. Since the turning radius of the inner and outer wheels is different when the vehicle turns, Ackermann can help the two front wheels point in the correct driving direction respectively to obtain more grip.
Over the years I've been driving, the Ackermann angle has been quite an interesting design feature. Essentially, it's a small angular difference engineered into the steering system to make the inner and outer wheels turn at different angles during cornering—the inner wheel turns more while the outer wheel turns less. This allows all four wheels to roll around a common center point rather than scrubbing and dragging the tires, reducing wear and improving cornering stability. In everyday driving, if the Ackermann angle isn't properly designed, you might notice screeching sounds during turns or faster tire wear, especially during sharp turns or mountain driving. Modern cars have optimized this feature well, resulting in smoother steering compared to older vehicles that were more prone to issues. Relatedly, proper vehicle and tire maintenance is crucial—regular wheel alignment checks ensure the Ackermann angle stays accurate for safety and peace of mind. For car enthusiasts modifying suspensions or fitting larger tires, remember to adjust this angle accordingly; otherwise, steering performance may suffer, outweighing any benefits.
