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Definition:
- Trailing Arm: A type of suspension component in an independent rear suspension system, designed to allow the wheels to move up and down with minimal interference from the body of the vehicle.
Characteristics:
- Pivot Axis:
- The pivot axis of a trailing arm is exactly perpendicular to the longitudinal axis of the vehicle. This means it runs across the vehicle from side to side.
- The wheels remain upright relative to the body of the vehicle, ensuring they lean with the body during cornering. This alignment helps maintain better contact with the road surface, improving handling and stability.
- Use in Vehicles:
- Trailing arms are widely used in the rear suspension of front-wheel-drive cars. They help provide a smooth ride and improved handling characteristics by allowing each wheel to respond independently to road irregularities.
Components and Function:
- Arm Structure:
- The trailing arm is typically a robust, elongated component that attaches to the vehicle’s chassis at one end and the wheel hub at the other.
- Bushings:
- Bushings at the pivot points of the trailing arm allow for smooth movement and reduce friction and noise. They also absorb some of the shocks and vibrations from the road.
- Shock Absorbers and Springs:
- The trailing arm works in conjunction with shock absorbers and springs to control the motion of the wheel and maintain the vehicle’s ride height and comfort.
Benefits of Trailing Arm Suspension:
- Improved Ride Quality:
- Provides a smoother ride by allowing the wheels to move independently, absorbing road imperfections more effectively.
- Enhanced Stability:
- Maintains better wheel alignment during cornering, contributing to improved handling and stability.
- Durability:
- The design of trailing arms is robust and can handle the stresses and strains of daily driving and rough road conditions.
- Space Efficiency:
- Often requires less space than other types of suspension systems, making it ideal for compact and front-wheel-drive vehicles.
A trailing arm is a key component in an independent rear suspension system, commonly found in front-wheel-drive cars. It pivots across the vehicle, keeping the wheels upright relative to the body, thus improving ride quality, stability, and handling. Its robust design and efficient use of space make it a popular choice for modern vehicles.
See Related Term:
- Semi-trailing arm.