Variable air quantity type automobile speed limiting device

A variable air quantity type automobile speed limiting device comprises a power source, a speed limiting switch, a speedometer, a single chip microcomputer, a relay, a speed limiting motor, a speed reducing mechanism, a speed limiting throttle valve and a display device. The device judges whether the automobile is overspeed or not through information of a speed limiting switch and a speedometer, so that a speed limiting motor and a speed reducing mechanism which are installed in an air inlet channel of an automobile engine are controlled, the opening degree of a speed limiting throttle valve is adjusted, the air inlet amount of the engine is reduced, the automobile speed is reduced, and a driver is prevented from being overspeed unconsciously. The system is simple in structure, convenient to install, low in cost and capable of being widely applied to various automobiles. 一种变空气量式汽车限速装置，包括电源、限速开关、车速里程表、单片机、继电器、限速电机、减速机构、限速节气门、显示装置。该装置通过限速开关、车速里程表信息判断汽车是否超速，从而控制安装在汽车发动机进气通道的限速电机、减速机构，调节限速节气门的开度，减小发动机的空气进气量，降低汽车的