Mechanical engineering is the use of scientific knowledge in physiology, psychology and sociology, through the study of human scale and operating range, human vision and light effects, auditory information transmission and noise interference, human adaptability to the environment, etc. , in order to subjectively and objectively make the various performances of the car better meet the needs of consumers.
The task of ergonomics is to guide the design of automobile body by finding out the law from the probability through the method of mathematical statistics according to the psychological and physiological characteristics of people.