OBD device and method for automatically starting and closing OBD device

Abstract

The embodiment of the invention discloses an OBD (On-Board Diagnostics) device and a method for automatically starting and closing the OBD device. The OBD device solve the technical problem that the existing OBD product is started and closed by a mechanical switch, and the electronic product with the OBD is physically disconnected by a mechanical shutdown method, experience is greatly reduced, and the battery power of the vehicle is low because the OBD electronic device is often forgotten to be closed due to personnel factors. The OBD device of the embodiment comprises a MCU (Micro-programmed Control Unit), a power supply management apparatus, a switch controller and an electronic switch, wherein the MCU is respectively connected with the power supply management apparatus and the switch controller, the power supply management apparatus and the switch controller are together connected with an electronic switch, and the other end of the electronic switch is connected with the OBD interfaces; the MCU is used for in real time monitoring the vehicle speed and revolving speed of the automobile through the OBD interfaces, if the vehicle speed and the revolving speed are zero, control signals are output to the switch controller to connect and disconnect the electronic switch, so that output is absent from the power supply management apparatus.

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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