Bus line type passenger car fault alarm apparatus and method

Abstract

The invention discloses a bus type passenger train fault alarming device and the method thereof, and relates to a device mounted on passenger train and the method thereof capable of obtaining fault codes and data flow information of a passenger train electric control system for fault alarming through a fault diagnosis interface OBD and a passenger train CAN bus interface. Microprocessor ECU is connected to a passenger train CAN bus interface under a standard of J1939 protocol to obtain the data flow of the bus and the relevant fault information for fault diagnosis, and obtains the fault codes of a passenger train electric control unit through the fault diagnosis interface OBD. The obtained information can be displayed on a liquid crystal display module LCM, and important prompting messages can be output by a speech output module for effectively reminding a driver. The device alarms in mode of speech or LCM displaying when the faults are shown by the electric control system of the passenger train for reminding the driver, so as to improve the driving safety of the passenger car.

Description

technical field [0001] The invention relates to a fault alarm device and method for bus-type passenger cars, belonging to the technical field of fault diagnosis and alarm for CAN-bus type passenger cars. Background technique [0002] With the continuous improvement of the electronic degree of passenger cars, the application of electronic control systems in passenger cars is becoming more and more common. The increasing complexity of the control system makes the fault location and maintenance of passenger cars more difficult. At the same time, the number of various electronic control units on the bus continues to increase, and the number of connecting wires increases significantly. Therefore, improving the communication reliability between control units and reducing the cost of wires have become urgent problems to be solved. For this reason, the German BOSCH company has developed the CAN bus agreement, and makes it an international standard (ISO11898). One of the biggest fe...

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Problems solved by technology

[0004] At present, in the field of passenger cars, there is no equipment that can communicate with the CAN bus of the passenger car, collect fault diagnosis information of various electronic control systems of the passenger car, and then inform the driver on the LCM screen or by voice. There is no report on this aspect in foreign countries. , or belong to the company's technical secrets, which are not disclosed to the public

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