What is the Difference Between Double Wishbone Suspension and Double Transverse Arm Suspension?
2 Answers
The differences between double wishbone suspension and double transverse arm suspension are: 1. Different in nature: Double wishbone suspension has upper and lower wishbones, with lateral forces absorbed by both wishbones simultaneously, while the strut only bears the vehicle's weight; Double transverse arm suspension consists of two transverse arms and is an independent suspension where the wheels swing within the transverse plane of the vehicle. 2. Different in applicability: Double wishbone suspension is mostly used in supercars; Double transverse arm suspension is widely used in the front and rear suspensions of sedans. The functions of the suspension system are: 1. Transmit forces and torques between the wheels and the frame; 2. Cushion the impact and vibrations transmitted from uneven road surfaces to the frame or body; 3. Ensure the wheels move within a fixed angle to maintain stable steering; 4. Support the weight of the wheels; 5. Maintain good contact between the wheels and the ground.
The main differences between double-wishbone and double-lateral-arm suspensions lie in the arm design and performance characteristics. The double-wishbone's arms resemble A-shaped forks, enabling precise control of wheel alignment, reducing body roll, and offering superior handling—especially during high-speed cornering where tires maintain firm contact, minimizing skidding. Double-lateral arms feature a straighter, more horizontal layout with simpler construction, prioritizing comfort, though they exhibit slightly more body sway during turns. Modern performance models often favor double-wishbone setups, like certain BMW series, to enhance driving feedback, while double-lateral arms are more common in budget vehicles such as the Toyota Corolla due to lower costs and easier maintenance. Both utilize independent suspension principles, with real-world distinctions depending on specific tuning (e.g., damper-spring optimization can blur boundaries). For daily driving, double-wishbone delivers steadier handling and a sportier feel, ideal for enthusiasts; double-lateral arms provide softer rides suited for urban commutes. Maintenance-wise, double-wishbone systems have more complex components and pricier replacements, whereas double-lateral arm parts are affordable and widely available. Ultimately, the choice hinges on prioritizing control or comfort—test drives are recommended for evaluation.
