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Vehicle mounted type automobile fault diagnostic apparatus

A technology of automobile fault diagnosis instrument, which is applied in the direction of electrical testing/monitoring, etc. It can solve the problems of difficult vehicle engine ECU system compatibility, difficulty in developing automobile fault diagnosis instrument, and high maintenance cost, so as to increase the scope of use and save research and development costs , the effect of compact system

Inactive Publication Date: 2008-10-15
杨思念
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Problems solved by technology

[0005] In order to overcome the difficulties in the development of the existing automobile fault diagnosis instrument, the compatibility with various vehicle engine ECU systems, high cost and high maintenance cost, the present invention provides an independent CPU with low cost and can meet the requirements of various Vehicle engine fault diagnosis needs, and the diagnosis effect is good vehicle-mounted vehicle fault diagnosis instrument

Method used

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  • Vehicle mounted type automobile fault diagnostic apparatus
  • Vehicle mounted type automobile fault diagnostic apparatus

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Embodiment Construction

[0020] The principle of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0021] Refer to the attached figure 1 and 2 , the vehicle-mounted vehicle fault diagnostic instrument of the present embodiment, the diagnostic instrument includes:

[0022] The signal processing module is connected to the diagnostic connector of the vehicle diagnostic socket through the diagnostic interface, which is connected to the diagnostic connector through the standard serial connector DB26, and the serial connector is used as a diagnostic interface for communicating with each sensor. The signal processing module adopts conventional modules with communication positive and negative logic control, communication level control, two-wire communication / single-wire communication control, communication line selection control, PWM communication interface and special communication line control.

[0023] Communication control module: used for the selec...

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Abstract

The invention provides an on-board automobile failure diagnosis instrument, belonging to the field of automobile electronic equipment technique. The on-board automobile failure diagnosis instrument of the invention is characterized in that the diagnosis instrument comprises a signal processing module which is connected with a diagnosis joint of an automobile diagnosis base by a diagnosis interface, a communication control module, a communication interface module, a memory module, a main control module, a liquid crystal display module and a power supply module. The on-board automobile failure diagnosis instrument provided by the invention has independent CPU, low cost and good diagnosis effect, and can comply with the failure diagnosis requirements of various automobile engines.

Description

(1) Technical field [0001] The invention relates to a vehicle-mounted vehicle fault diagnosis instrument, which belongs to the technical field of vehicle electronic equipment. (2) Background technology [0002] With the continuous development of automobile technology, the working conditions of modern automobiles are controlled by electronic control units (abbreviation of electronic control unit (ECU)), which makes modern automobiles more advanced in terms of power, safety and environmental protection. [0003] First of all, various automobile engines are equipped with a number of sensors to collect various operating data of the engine, such as a series of data such as water temperature, air flow, throttle opening, and entry temperature. These data are input to the engine On the ECU of the engine, the engine ECU can control the ignition, fuel injection, acceleration and other working conditions of the car according to these input data. At present, the fault diagnostic instru...

Claims

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Application Information

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IPC IPC(8): G05B23/02
Inventor 杨思念陈煜杨显平
Owner 杨思念
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