Push Rod Suspension Geometry Question Camber Change Wheels

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SUMMARY

This discussion focuses on the geometric modeling of double wishbone suspension systems in automotive engineering, specifically how changes in the angle of the horizontal member (AC) affect the positions of points D, G, and H. The user seeks clarity on the relationship between suspension geometry and camber changes during wheel displacement. Key insights include the acknowledgment that unequal length A-arms contribute to increased camber during bump, and a recommendation to study the Race Car Suspension class for deeper understanding.

PREREQUISITES
  • Understanding of double wishbone suspension systems
  • Knowledge of geometric modeling in automotive engineering
  • Familiarity with suspension dynamics and camber changes
  • Basic principles of spring and damper mechanics
NEXT STEPS
  • Study the principles of double wishbone suspension geometry
  • Learn about camber changes in suspension systems
  • Research the Race Car Suspension class for advanced concepts
  • Explore software tools for modeling suspension dynamics
USEFUL FOR

Automotive engineers, suspension designers, and students studying vehicle dynamics will benefit from this discussion, particularly those interested in suspension geometry and its effects on vehicle performance.

Gianluca Bush
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Hey,

I've spent ages trying to solve what seems to be a pretty simple geometrical problem and I was wondering if anyone could help me solve it/give me some tips. I am trying to model how the suspension of a car behaves as a result of a displacement of the wheels.

What the attachment shows is a double wishbone suspension connected to a fixed chassis - similar to these sorts of mechanics: http://rezachu.blog.com/files/2012/12/KugelPushrod.jpghttp://poisson.me.dal.ca/~dp_10_14/oldarchitecture/images/bc.bmp

The suspension arms rotate about the fixed pivots on the chassis (at points A and E) and the push rod goes on the compress a spring/damper.

So my question is: for an anti clockwise change in angle (delta) in the horizontal member, AC, how will this deflection affect the position of D, G and H - all in terms of the given geometry and angle, delta.

Apologies if I have not phrased my question clearly.
Any advice would be appreciated.
 

Attachments

  • PushRodCarImages.jpg
    PushRodCarImages.jpg
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Engineering news on Phys.org
FYI, the 31.28 & 41.28 angles are inaccurate.
 
you will build camber in Bump..it will be more camber as you have two non equal length A-arms...suggest you read Race Car Suspension class in Automotive forum
 

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