Increased knowledge, car wheels are crooked when they leave the factory

People often say,carIt’s complicated. It’s not magical at all that an engine can run with a chair and four wheels. If you think about it carefully, it’s not rough, but there is something that can be regarded as "cold knowledge". When it is "crooked". Usually we see this after the car is parked:

It seems that the two front wheels are parallel to the body and perpendicular to the ground. There is nothing special about it, but is it really what we see with the naked eye?No...actually, usually the front wheel of a car is like this.From front to backObserve the vehicle from the viewing angle:

1. The front wheel is tilted

The front wheel camber means that the upper end of the front wheel tilts outwards after the front wheel is installed, so an angle is formed between the rotation plane of the front wheel and the longitudinal vertical plane, which is called the front wheel camber angle. Its main function is to make the steering light and make the Wheel closeWheel hubThe inner bearing reduces the load on the outer bearing and the hub nut, which is conducive to safe driving. The picture above can also be compared to the "Inner Bazi" foot. In this case, is there a "Outer Bazi" foot?

People often say,carIt’s complicated. It’s not magical at all that an engine can run with a chair and four wheels. If you think about it carefully, it’s not rough, but there is something that can be regarded as "cold knowledge". When it is "crooked". Usually we see this after the car is parked:

It seems that the two front wheels are parallel to the body and perpendicular to the ground. There is nothing special about it, but is it really what we see with the naked eye?No...actually, usually the front wheel of a car is like this.From front to backObserve the vehicle from the viewing angle:

1. The front wheel is tilted

The front wheel camber means that the upper end of the front wheel tilts outwards after the front wheel is installed, so an angle is formed between the rotation plane of the front wheel and the longitudinal vertical plane, which is called the front wheel camber angle. Its main function is to make the steering light and make the Wheel closeWheel hubThe inner bearing reduces the load on the outer bearing and the hub nut, which is conducive to safe driving. The picture above can also be compared to the "Inner Bazi" foot. In this case, is there a "Outer Bazi" foot?

Usually the front wheel camber angle of our ordinary family car is about 1°, but for vehicles with high-speed and sharp steering requirements, the front wheel camber angle can be reduced or even negative. If it is negative, it is the "outside horoscope" foot. A simple example is shown in the picture above. The F1 car is a “outer horoscope” because it requires extremely high cornering limits and speeds.

Let's change another oneBird's eye viewObserve the vehicle:

2. Front wheel toe

The toe of the front wheel refers to the difference in the distance between the front end face and the rear end face of the front wheel in the transverse direction of the car. It can also refer to the angle between the forward direction of the car body and the plane of the front wheel. In this case, it is also called the toe angle.Due to the camber of the front wheels mentioned above, the left and right wheels will often act on the opposite roll thrust corresponding to the camber angle.tireIncreased wear. In order to avoid this situation, we must find a way to eliminate this roll thrust. Schematic diagram of enlarged partial front wheel:

To eliminate this roll thrust, it is necessary to appropriately select the toe angle mentioned above, so that the lateral force caused by the toe and the roll thrust caused by the camber of the wheel can cancel each other out.Thus avoiding additionaltireAbrasion and power consumption. Therefore, it can generally be said that the toe angle is due to the needs of the camber angle.

Therefore, the wheels of the car are really a bit "crooked".