OBD device and method for realizing automatic power-on and power-off

Abstract

The embodiment of the present invention discloses an OBD device and its method for realizing automatic power-on and automatic power-off, which solves the problem that the existing OBD products adopt the method of mechanical switch to switch the machine, because the electronic products connected with OBD generally adopt mechanical power-off The method of physical disconnection greatly reduces the experience, and often forgets to turn off the OBD electronic device due to human factors, which leads to technical problems of low battery power in the car. The OBD device of the embodiment of the present invention comprises: MCU, power manager, switch controller and electronic switch, MCU is connected with power manager and switch controller respectively, and power manager and switch controller are connected with an electronic switch jointly, The other end of the electronic switch is connected to the OBD interface; among them, the MCU is used to monitor the vehicle speed and rotation speed of the vehicle in real time through the OBD interface. The device has no output.

Description

[0001] This application is based on the Chinese patent application number 201410609382.8, the applicant is Huizhou Huayang Multimedia Electronics Co., Ltd., and the name is "a HUD and its control method" as the priority document. technical field [0002] The invention relates to the technical field of vehicle communication, in particular to an OBD device and a method for realizing automatic power-on and power-off thereof. Background technique [0003] OBD (On-Board Diagnostic, on-board diagnostic system) is used to monitor the operating status of the engine and the working status of the exhaust after-treatment system at any time. Once a situation that may cause excessive emissions is found, a warning will be issued immediately, for example, when the system fails. , the malfunction light (MIL) or the check engine (Check Engine) warning light is on, and the OBD system will store the fault information in the memory, and the relevant information can be read in the form of fault c...

AI Technical Summary

Problems solved by technology

The 12V power supply in the OBD is directly connected to the positive pole of the car battery. After the car is turned off, the 12V of the OBD still has power. If there are electronic products connected to the OBD and the owner does not drive for a long time, the battery power will be consumed and the ignition will not be possible.

[0005] However, the existing OBD products use a mechanical switch to switch on and off, because the electronic products connected to the OBD are usually physically disconnected by mechanical shutdown, which greatly reduces the experience, and often forget to turn off due to human factors OBD electronic devices, technical issues causing low car battery

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