Side Load Springs as a Solution to Minimize Adverse Side Loads Acting on the McPherson Strut

The cost pressure experienced by the automotive industry and the necessity to reduce the vehicle weight have resulted in a renewed and growing interest in axle systems fitted with McPherson struts.

Contrary to the SLA front suspension, the McPherson strut replaces the upper steering rod by a damper unit, which is rigidly connected to the axle legs. The damper unit is fastened to the upper wheel guard by a rubber-metal bearing. The McPherson strut permits long spring deflections and provides, compared with the SLA front suspension, an improved transmission ratio of spring and wheel; coordinating the riding comfort is consequently facilitated.

However, the damper is subjected to side loads which from time to time cause it to respond inappropriately. To remedy this disadvantage the side load spring was developed.