Auto Fault Self-diagnosis
Vehicle maintenance is past the core machinery repair manual skills
, the main emphasis on vehicle maintenance technology, and to repair parts for the major maintenance technology, but also assembly and disassembly process to adjust the combination of parts repair process. The tools we can use to launch x431, lexia3, mb star.In contrast, the modern automobile maintenance is based on mechanical, electrical, hydraulic integration of the core of the comprehensive system diagnostics diagnostics.Automobile Maintenance prominent diagnostic techniques, and to accurately diagnose faults as the goal, fully demonstrating the "seven diagnostic, one-third of repair" of the modern car maintenance methods; a result, many electronics companies have coveted cars, and equipment maintenance markets, have developed to meet the future automotive self-diagnosis tasks.
In the solid basis of development of automotive electronics automobile self-diagnosis function. Do not overlook the launch x431 of use.Since the beginning of electronic technology and vehicle technology combination, the electronic technology in the car on the increasingly wide range of applications, especially in the field of electronic technology of integrated circuits, large-scale integrated circuits and VLSI development, a car special offers functionality, reliability, fast response, low cost of automotive electronic control systems.
However, the electronic vehicle control, but also brought new problems. First, automobile electronic control systems become more complex, more and more difficult vehicle maintenance, vehicle maintenance capability of technical staff is relatively increased; other hand, the electronic control system security debugging features to prevent car because electronic control system itself fails, resulting in vehicle emissions control and can not run.
Therefore, in order to cope with situations such as these, automotive electronic control technology R & D personnel, conducting Vehicle Electronic Control System design, while increasing fault self diagnosis system. It can run the process in the automotive electronic control systems continuously monitor, including: engine start, engine, electronic ignition, fuel injection and other system operation status.
Once Fashengyichang case, Zaigen Ju-specific algorithms calculate Chujutidi Guzhang reasons, and to Dai Ma Xingshicunchu in the driving system (or Chen traffic black box), while the corresponding fault Yunxing module Gongneng start, Shi Chan Sheng failure of Qi Ju Neng to repair shop for maintenance, and technical maintenance personnel can use the vehicle self-diagnostic function to find the fault code for the failure to accurately repair the problem fast.
The basic principle of fault self-diagnosis and composition. Reliability and easy maintenance from the point of view, automotive electronic control system should be equipped with self-diagnostic function; since the 80's GM vehicles the United States developed the first in a new electronic control system malfunction self-diagnostic function to add, the global world-class car manufacturers emulate, have produced in various electronic control systems equipped with a fault in the self-diagnostic function; after a long period of development, self-diagnostic module will not only address the safety of automobile electronic control systems and vehicle storage memory failure also able to provide immediate car produced by a variety of system operation parameters. Also noted that the use of what tools, such as lexia3 of use.Since then, the "car fault self-diagnosis function" has become the new car factory and car repair workshop fault detection problem indispensable helper.
The basic principle of fault self-diagnosis and composition. Reliability and easy maintenance from the point of view, automotive electronic control system should be equipped with self-diagnostic function; since the 80's GM vehicles the United States developed the first in a new electronic control system malfunction self-diagnostic function to add, the global world-class car manufacturers emulate, have produced in various electronic control systems equipped with a fault in the self-diagnostic function; after a long period of development, self-diagnostic module will not only address the safety of automobile electronic control systems and vehicle storage memory failure also able to provide immediate car produced by a variety of system operation parameters. Since then, the "car fault self-diagnosis function" has become the new car factory and car repair workshop fault detection problem indispensable helper.
Currently, for sensors, electronic control systems, implementation of the components are three kinds of monitoring devices to detect the fault reason, fault self-diagnosis module to a different response measures:
When the car of a sensor or circuit failure, its signal can no longer control parameters of a vehicle, to car to run continuously, fault self-diagnosis program in the memory module did give out pre-set transfer the experience of value as input parameters of the circuit response, the automobile will continue to operate in a short time.
When the electronic control system itself produces failure, fault diagnosis module will Chufabeiyong control loop response of Jiandan right control, cars can Kaidao repair scheduled maintenance emergency called fault "Auto failure limp "feature.
When the car took place on an implementation of the components of unknown cause of the malfunction may result in damage or serious consequences for other components, to be safe, self-diagnostic module to take certain safety measures, the implementation of certain functions automatically stop, this function is called fail-safe.Also to consider the use of mb star. For example: When the ignition failure, fault self-diagnosis module will stop the fuel injection system provides the power to suspend the fuel injection nozzle supply, restrain the gas mixture is not burning completely into the exhaust system to reduce accidents occurred.
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