1. What is Motion Ratio in Suspension?

Motion Ratio in Suspension is the ratio of shock travel to the corresponding wheel travel. It's a crucial parameter in suspension design that determines how much the spring and damper move in relation to wheel movement.

2. How Does the Calculator Work?

The calculator uses the motion ratio formula:

Where:

• \( M.R. \) — Motion Ratio in Suspension (unitless)
• \( IR \) — Installation Ratio (unitless)

Explanation: The motion ratio is calculated by squaring the installation ratio, which represents the mechanical advantage in the suspension system.

3. Importance of Motion Ratio Calculation

Details: Accurate motion ratio calculation is essential for proper suspension tuning, spring rate selection, and damper setup in automotive applications.

4. Using the Calculator

Tips: Enter the installation ratio value (must be greater than 0). The calculator will compute the corresponding motion ratio.

5. Frequently Asked Questions (FAQ)

Q1: What is Installation Ratio?
A: Installation Ratio is the ratio between how much the spring and damper move in relation to how far the wheel and tyre move.

Q2: Why is motion ratio squared from installation ratio?
A: The motion ratio is squared because it accounts for both the geometric relationship and the mechanical advantage in the suspension linkage system.

Q3: What are typical motion ratio values?
A: Motion ratio values typically range from 0.5 to 1.5, depending on the suspension design and vehicle application.

Q4: How does motion ratio affect spring rate?
A: The effective spring rate at the wheel is the actual spring rate multiplied by the square of the motion ratio, making this calculation crucial for suspension tuning.

Q5: When should motion ratio be measured?
A: Motion ratio should be calculated during suspension design and verified through physical measurements during suspension setup and tuning.