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Engine Torque Formula:
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Engine torque calculation determines the rotational force produced by an engine. In metric units, torque is calculated from power (in kilowatts) and rotational speed (in revolutions per minute) using the standard formula.
The calculator uses the engine torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors to calculate torque in Newton-meters from power in kilowatts and speed in rpm.
Details: Accurate torque calculation is essential for engine performance analysis, mechanical design, vehicle dynamics, and determining the pulling power and acceleration capabilities of engines.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion: 60,000/(2π) ≈ 9550, which converts power from kW to Nm/s and speed from rpm to rad/s.
Q2: What are typical torque values for different engines?
A: Torque values vary significantly by engine type. Small car engines might produce 100-200 Nm, while large diesel engines can produce over 2000 Nm.
Q3: How does torque relate to vehicle performance?
A: Higher torque generally means better acceleration and towing capacity. Torque determines the engine's ability to do work, while power determines how quickly that work can be done.
Q4: Can this formula be used for electric motors?
A: Yes, the same formula applies to electric motors, though electric motors typically have different torque characteristics than internal combustion engines.
Q5: What's the difference between torque and horsepower?
A: Torque is a measure of rotational force, while horsepower is a measure of power (work done over time). Horsepower = (Torque × RPM) / 5252 (in imperial units).