Disclosed is an automated manual mechanical stepless speed change device. A
brake is arranged on the left while an accelerator is arranged on the right, the automated manual mechanical stepless speed change device is intrinsically safe, the
brake and the accelerator cannot be stepped mistakenly and can be stepped simultaneously, and
black smoke is eliminated. A
lotus-shaped gear shifting
handle with a
lotus petal type
clutch switch can be used in a purely manual mode and an automatic mode, and is connected with a gear shifting
handle of an electric transmission box via hard and soft chain links, a traditional
gear transmission box is upgraded into the stepless speed change device via a three-loop PID (
proportion integration differentiation) adjuster, automatic gear shift and trip stop are realized according to driving intention, a
computer program with the functions is developed, automobile maneuverability such as stableness and comfortableness or
fast speed and high power can be optionally set by means of human-
machine interaction HMI, and accordingly a driver can randomly drive an automobile with the automated manual mechanism stepless speed change device with facility. The automated manual mechanical stepless speed change device further comprises an upgraded
clutch and
brake system speed changing device, two semi-
stroke mechanical
clutch draw bars, a semi-
stroke brake draw bar and a semi-
stroke scribing resistance type clutch draw bar, and the upgraded clutch and brake
system speed changing device shields clutch actions and leads an engine to be idle during braking after the speed of the automobile exceeds a set value.