* Engine size (displacement): Larger engines generally produce more power.
* Engine speed (RPM): Power output typically peaks at a certain RPM range.
* Compression ratio: Higher compression ratios generally lead to more power.
* Fuel type: Different fuels have different energy densities, affecting power output.
* Engine design: Factors like valve timing, intake and exhaust manifold design, and the presence of a turbocharger all influence power.
What "break power" actually means:
* Brake power (bhp) is the power measured at the crankshaft, before any losses due to transmission, accessories, etc.
* Indicated power (ihp) is the power produced inside the cylinders, before any frictional losses.
* Net power (nhp) is the power delivered to the wheels, after losses in the transmission, accessories, etc.
How to find break power for a specific engine:
1. Consult the engine manufacturer's specifications: The most reliable source for break power is usually the engine manufacturer's documentation.
2. Look up engine performance curves: These graphs show power output at various engine speeds.
3. Use a dynamometer: This device measures the actual power output of an engine.
Example:
A 2.0L four-stroke petrol engine might have a break power of 150 bhp at 6000 RPM. However, a 1.0L engine with different design features could also produce 150 bhp at a higher RPM.
In summary:
"Break power" is not a fixed value for all four-stroke petrol engines. It depends on a variety of factors, and you need to consider specific engine parameters and manufacturer information to determine the break power for a particular engine.
