Which term is used for the graph that shows engine torque across operating conditions?

Which term is used for the graph that shows engine torque across operating conditions?

• A. Torque Curve
• B. Torque Map
• C. Power Curve
• D. Torque Table

Answer: (A)

The main idea here is that we typically plot how engine torque changes as the engine speed varies. When you create a graph of torque across different RPMs for a given operating condition, the result is called a torque curve. It shows how torque rises to a peak and then falls as the engine spins faster, helping you understand where the engine delivers the most torque and how it behaves across the rev range. A torque map, by contrast, is usually a broader representation—often 2D or 3D—of torque across multiple operating points (like RPM and load or throttle position), giving a fuller picture of performance under varying conditions. A power curve would plot power versus RPM, and a torque table is a discrete grid of torque values rather than a plotted graph. So the term that best fits a graph of engine torque as it changes with operating speed is torque curve.

The main idea here is that we typically plot how engine torque changes as the engine speed varies. When you create a graph of torque across different RPMs for a given operating condition, the result is called a torque curve. It shows how torque rises to a peak and then falls as the engine spins faster, helping you understand where the engine delivers the most torque and how it behaves across the rev range.

A torque map, by contrast, is usually a broader representation—often 2D or 3D—of torque across multiple operating points (like RPM and load or throttle position), giving a fuller picture of performance under varying conditions. A power curve would plot power versus RPM, and a torque table is a discrete grid of torque values rather than a plotted graph.

So the term that best fits a graph of engine torque as it changes with operating speed is torque curve.