What is the working principle of cruise control system?

The working principle of the cruise control system is that in the automobile cruise control system, the electronic device can automatically adjust the engine throttle opening according to the change of driving resistance, so as to keep the driving speed constant. Matters needing attention in the use of cruise control system are as follows: 1. When there is traffic jam or heavy rain, don't use the cruise control system for safety reasons; 2. When using the cruise control system, pay attention to whether the indicator light CRUSE on the instrument panel flashes; 3. When the car is driving on a steep slope, the cruise control system should be turned off immediately; 4. When driving downhill, avoid vehicle acceleration; 5. To avoid misoperation of the cruise control system, when the cruise control system is not applicable, turn off the control switch of the cruise control system.