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Another variant of the MacPherson strut is the double pivot front suspension, which splits the lower wishbone into two while retaining the standard upright design of the MacPherson strut. That allows for better control of steering geometry and scrub radius, while allowing for a larger brake assembly.
Pull-rod suspension and push-rod suspension refer to a specialised type of automotive suspension system which is largely based on a double-wishbone system, incorporating elements of the commonly used MacPherson strut. [1] In cars, suspension refers to the system by which the vehicle maintains contact between all of its wheels and the ground.
Double wishbone suspensions are more complex, impose more difficult packaging constraints, and are thus often more expensive than other systems like a MacPherson strut. Due to the increased number of components within the suspension setup, it takes much longer to service and is heavier than an equivalent MacPherson design.
You shouldn't dismiss MacPherson struts, which are on more top cars than you'd think. Nearly all Porsche 911s, every BMW M3, the list goes on...
It is typically used with a MacPherson strut, but can also be applied to a double wishbone suspension. [3] In either case, the difference is that the single bottom wishbone is replaced by a pair of suspension links forming a trapezoidal four-bar linkage .
Certain vehicles — notably, many Honda products from the 1990s -- feature what's known as a double wishbone suspension. A double wishbone design features both upper and lower control arms that work in tandem with each other to properly locate the wheel. The additional radius rod is then attached to the upper arm.
Wishbone and multi-link allow the engineer more control over the geometry, to arrive at the best compromise, than swing axle, MacPherson strut, or swinging arm do; however, the cost and space requirements may be greater. Semi-trailing arm is in between, being a variable compromise between the geometries of swinging arm and swing axle.
The type of suspension (MacPherson strut or double wishbone suspension) Type of steering actuator (rack and pinion or recirculating ball) Location of the steering actuator in front of, or behind, the wheel centre; For the rear suspension there are many more possible suspension types, in practice.