When it comes to four wheel positioning, there are several terms that are commonly used in the automotive industry. Here are some definitions for key terms related to four wheel positioning:
1. Camber: Camber refers to the angle of the wheels when viewed from the front or rear of the vehicle. It is the vertical tilt of the wheel, either inward (negative camber) or outward (positive camber), measured in degrees. Proper camber alignment ensures even tire wear and stability during cornering.
2. Toe: Toe refers to the angle at which the wheels point inward or outward when viewed from above the vehicle. It is the difference in distance between the front and rear of the tires. Toe alignment can be set to be parallel (zero toe), slightly inward (toe-in), or slightly outward (toe-out). Proper toe alignment ensures straight-line stability and even tire wear.
3. Caster: Caster is the angle of the steering axis when viewed from the side of the vehicle. It is the forward or backward tilt of the steering axis relative to the vertical axis. Proper caster alignment affects steering stability, self-centering, and cornering performance.
4. Thrust Angle: Thrust angle refers to the angle between the vehicle's centerline and the rear axle. It is determined by measuring the angle of the rear axle in relation to the centerline of the vehicle. A proper thrust angle alignment ensures that all four wheels are aligned with the vehicle's direction of travel, reducing tire wear and enhancing stability.
5. Ackermann Angle: The Ackermann angle is a steering geometry concept that ensures the inside and outside wheels of a vehicle turn at different angles during cornering. This allows for better handling and reduces tire scrubbing. The Ackermann angle is achieved by adjusting the tie rods and steering linkage.
It's important to note that these definitions provide a basic understanding of the terms, but the specific alignment specifications and recommendations for a particular vehicle may vary. It's advisable to consult the vehicle's manufacture or a qualified automotive technician for precise alignment specifications and adjustments.