What is the difference between wot and pot acceleration in automobile nvh?

There are two main types of nvh performance tests under automobile acceleration conditions. One is wot working condition, that is, full throttle acceleration with throttle opening of 100%; One is the boiler condition, and the throttle opening is not 100%. It is easy to control the throttle opening in wot mode, and the driver only needs to step on the throttle to the end. It is complicated to control the throttle opening in pot mode, and most tests are based on the driver's driving habits to accelerate nvh test. Because of the different throttle opening, nvh test data can not be directly compared, or the driver tries to keep the same pedal posture. Due to the long test time, it is difficult to keep the throttle opening stable.