Types of Control Arms

Question

Accepted Answer

1. By Construction (按结构分类)

A-Arm (Wishbone Control Arm) (A型控制臂/叉臂)

Triangular shape, commonly used in double-wishbone suspensions.

Provides better stability and adjustability.

L-Shaped Control Arm (L型控制臂)

Used in MacPherson strut suspensions.

Simpler design, often found in front-wheel-drive vehicles.

Straight Control Arm (直臂式控制臂)

Single-piece design, typically used in rear suspensions or solid axles.

2. By Material (按材质分类)

Steel Control Arm (钢制控制臂)

Heavy but durable, common in budget and heavy-duty vehicles.

Aluminum Control Arm (铝合金控制臂)

Lighter weight, improves handling and fuel efficiency (common in performance/luxury cars).

Forged Control Arm (锻造控制臂)

Stronger than cast arms, used in high-performance applications.

3. By Adjustability (按可调性分类)

Fixed Control Arm (固定式控制臂)

Standard design with no adjustability (OEM applications).

Adjustable Control Arm (可调式控制臂)

Allows camber/caster/toe adjustments (common in modified/race cars).

4. By Suspension Type (按悬挂类型分类)

Upper Control Arm (上控制臂)

Connects the chassis to the wheel hub (used in double-wishbone setups).

Lower Control Arm (下控制臂)

Bears most of the vehicle’s weight and impacts handling.

Multi-Link Control Arm (多连杆控制臂)

Used in advanced independent suspensions (e.g., BMW 5-link rear suspension).