1. What is a Torque Converter Gear Ratio Calculator?

Definition: This calculator determines the torque ratio (TR) of a torque converter by comparing output torque to input torque.

Purpose: It helps automotive engineers and mechanics analyze and optimize torque converter performance in vehicle transmissions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( TR \) — Torque ratio (dimensionless)
• \( T_{out} \) — Output torque (Newton-meters, Nm)
• \( T_{in} \) — Input torque (Newton-meters, Nm)

Explanation: The torque ratio indicates how much the torque converter multiplies the input torque from the engine.

3. Importance of Torque Ratio Calculation

Details: Understanding torque ratio helps in transmission design, vehicle acceleration analysis, and fuel efficiency optimization.

4. Using the Calculator

Tips: Enter both output and input torque values in Newton-meters (Nm). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical torque ratio range?
A: Most torque converters have ratios between 1.8:1 to 2.5:1 at stall, decreasing to 1:1 at coupling speed.

Q2: How does torque ratio affect vehicle performance?
A: Higher ratios provide better acceleration from standstill but may reduce fuel efficiency at higher speeds.

Q3: What's the difference between torque ratio and gear ratio?
A: Torque ratio is specific to the torque converter's fluid coupling, while gear ratio refers to mechanical gear reduction.

Q4: When would I need to calculate torque ratio?
A: When diagnosing transmission issues, modifying vehicles, or designing new transmission systems.

Q5: Can torque ratio be less than 1?
A: Yes, at higher speeds when the converter is in coupling phase, the ratio approaches 1:1 or slightly less due to efficiency losses.