The work done by the engine per unit time is called the power of the engine.Corresponding to indicated work and effective work, they are called indicated power and effective power (output power), and the difference between them is called mechanical loss power.
The work done by the engine per unit time is called the power of the engine.Corresponding to indicated work and effective work, they are called indicated power and effective power (output power), and the difference between them is called mechanical loss power.[1]
The symbol is: P
Common unit: w
engineThe power of is not equal to the power of the car. In the mechanical transmission, there will be intermediate loss of power.In addition, the design of thickening and weighting the body for safety reasons will also lead to the loss of engine power.Therefore, cars with small displacement engines are not necessarily slower or worse than cars with high-power engines.
Of course, the higher the specific power and torque, the better, which means that the power reserve is sufficient. However, if the car is equipped with a necessary and luxurious configuration to reduce its value, it does not mean more problems.
In the case of the same displacement, the power is of course the greater the better. Some car manufacturers use advanced technologies, such as intake valve travel control, EGR, 5-valve, etc., so the power increase is inevitable, but at the same time, it means that the engine cost increases.The engine selected by the manufacturer for a certain model is actually a balance point between power, economy, emissions and cost, not just higher power and torque. Sometimes, the engine with higher power can be sacrificed for cost.
If the engine power is high, the fuel consumption will definitely be high, and the emission pollution will also increase. For consumers and the environment, it is one-sided to blindly pursue power or power.The reason why some domestic and foreign models can provide consumers with a large price range is that manufacturers have matched various engines, transmissions, power systems and electrical systems.But with a good engine (high power, not necessarily large displacement), the price of the car will rise significantly.
