Who performs better than an electric car with the same power and a gasoline car?

Electric motors and internal combustion engines of the same power have similar torques. Strong power requires the support of high torque, and the size of the torque determines the speed of a car’s acceleration, which is the so-called momentum. But sometimes the torque of an electric motor of the same power is not higher than that of an internal combustion engine.

For example, the motor power used by BYD Qin pro is 110kw and the maximum torque is 250Nm, while the 1.5T engine used by BYD Qin pro has a maximum power of 113kw and a maximum torque of 240 Nm. It can be said that the motor and engine torque of the same power is also close. Another example is the Volkswagen 1.4T engine with a maximum power of 110kw and a maximum torque of 250Nm. The power and torque are the same as BYD’s 110kw motor. Since the power and torque are almost the same, why does it feel that the power of electric vehicles is better? In fact, this is the reason why the characteristics of the motor and the engine are different.

  Who performs better than an electric car with the same power and a gasoline car?

The motor is characterized by low speed and high torque. In a certain speed range, the torque of the motor is constant. The above picture shows the characteristics of the motor very well: in a certain speed range, the torque of the motor will not change due to the change of the speed, and it always outputs a large torque before 4000 rpm. Even when it is only a few tens of revolutions per minute, its maximum torque is almost unchanged. The maximum torque of the engine requires speed support. For example, a turbocharged engine has a maximum torque speed range of 1600 rpm to 4400 rpm, so if the engine wants to explode the maximum torque, the speed must be pulled to more than 1600 rpm. In the previous low-speed condition, the maximum torque could not be output.

The motor can output the maximum torque at a low speed. The first half of the motor works under constant torque conditions. When the same two vehicles are started, the internal combustion engine needs a short delay to increase the speed. During this period, the power will have a sense of delay. After the motor is started, it does not need speed support, and it can output high torque at low speed, so the power delay is almost small, and the maximum torque is almost instantaneously burst out, and the vehicle starts significantly faster than the fuel car.

  

The same is true for rapid acceleration. There will still be a certain delay in the power of the fuel car, because the gearbox needs to downshift, and the power will be slower at this time. The electric vehicle gearbox is just a single-speed reduction box, and does not require shifting, so the speed is faster. This is the reason why the electric motor with the same power and torque can increase the speed faster than the internal combustion engine, and the power performance is stronger.

Author: Yoyokuo