Method for preventing motor rotation blockage of automotive electric trunk and position sensor used thereby

Abstract

The invention aims to provide a method for preventing motor rotation blockage of an automotive electric trunk and a position sensor used thereby so as to avoid the rotation blockage of a motor, guarantee the safe use of the electric trunk and meet requirements on humanized automobile design. In the method for preventing the motor rotation blockage of the automotive electric trunk of the invention, an opening and closing device of the electric trunk consists of a control unit, a sensor and a transmission mechanism, wherein the transmission mechanism comprises the motor and a hinge; the sensor comprises the position sensor for detecting the position of an electronic trunk lid and a current sensor for detecting the current volume of the motor; and the control unit judges whether the movement of the electronic trunk lid is obstructed by a barrier according to signals of the position sensor and the current sensor, so that the rising, descending or stop actions of the electronic trunk are controlled, the motor rotation blockage of the automotive electric trunk is effectively prevented, and barrier detection and anti-clamping of the electric trunk are realized. Thus, the safe use of the electric trunk is guaranteed and the requirements on the humanized automobile design are met.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a method for preventing motor lock-up of an electric trunk of an automobile with automatic opening and closing functions. Background technique [0002] For the convenience of users, electric trunks with automatic opening and closing functions appear on some middle and high-end cars at present, but some functions of this kind of electric trunks have not been perfected, such as how to prevent the trunk motor from stalling. During the opening and closing process of the trunk lid, obstacles may be encountered and cause the motor to stall. This involves the obstacle detection and anti-pinch control of the trunk. The pinch control can refer to the anti-pinch control method of the electric window, but the movement of the trunk is different from the linear motion of the window. The opening angle of the trunk must be considered. In addition to the friction of ...

AI Technical Summary

Problems solved by technology

[0002] For the convenience of users, electric trunks with automatic opening and closing functions have appeared on some mid-to-high-end cars, but some functions of this kind of electric trunks have not been perfected, for example, how to prevent the trunk motor from stalling

During the opening and closing process of the trunk lid, obstacles may be encountered and cause the motor to stall. This involves the obstacle detection and anti-pinch control of the trunk. The pinch control can refer to the anti-pinch control method of the electric window, but the movement of the trunk is different from the linear motion of the window. The opening angle of the trunk must be considered. In addition to the friction of the system, the gravity of the trunk lid should also be considered during movement. And factors such as the need to lock the trunk after closing, so the anti-pinch design of the electric trunk is more complicated

In addition, due to the large range of movement of the trunk, it is also necessary to consider whether obstacles are encountered during the opening stage, which will block the trunk lid.

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