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Engine Torque Formula:
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Engine torque is the rotational force produced by an engine, measured in Newton-meters (Nm). It represents the engine's ability to perform work and is a crucial parameter in determining vehicle performance and pulling power.
The calculator uses the torque formula:
Where:
Explanation: The formula calculates the torque output based on the engine's power and rotational speed, with 9550 being the conversion factor that accounts for units (kW to W and rpm to rad/s).
Details: Torque calculation is essential for engine performance analysis, vehicle design, transmission selection, and understanding the engine's capability to accelerate and haul loads.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero.
Q1: Why is 9550 used in the formula?
A: 9550 is derived from unit conversions: 60,000/(2π) ≈ 9550, which converts power from kW to W and speed from rpm to rad/s.
Q2: What's the difference between torque and power?
A: Torque is rotational force, while power is the rate at which work is done (torque × angular velocity). Power indicates how fast work can be done, while torque indicates the force available.
Q3: What are typical torque values for different engines?
A: Small car engines: 100-200 Nm, performance cars: 300-600 Nm, trucks: 800-2000+ Nm. Values vary significantly based on engine size and type.
Q4: How does torque affect vehicle performance?
A: Higher torque provides better acceleration, towing capacity, and hill-climbing ability. Diesel engines typically produce higher torque at lower RPMs than gasoline engines.
Q5: Can I use horsepower instead of kilowatts?
A: Yes, but you'll need to convert horsepower to kilowatts first (1 kW ≈ 1.341 hp) or use a different constant in the formula for horsepower input.