Fault diagnosis instrument for national VI engine electronic fuel injection system

Abstract

The invention discloses a fault diagnosis instrument for a national VI engine electronic fuel injection system, and belongs to the technical field of engine tests. The problems that an existing faultdiagnosis module cannot be solidified, a fault diagnosis system occupies calibration resources, diagnosis is time-consuming and labor-consuming, and data flow and fault information of core parameterscannot be read quickly can be solved. The fault diagnosis instrument for the national VI engine electronic fuel injection system comprises a DB9 interface, a CAN bus module, a single-chip microcomputer, a reserved storage card and a touch screen, the DB9 interface, the CAN bus module and the single-chip microcomputer are connected in sequence, the single-chip microcomputer is in bidirectional connection with the reserved storage card, and the single-chip microcomputer is in bidirectional connection with the touch screen. The fault diagnosis instrument for the national VI engine electronic fuelinjection system is suitable for core data checking and fault diagnosis of the national VI engine electronic fuel injection system in an engine laboratory, and it is guaranteed that fault diagnosis of a new engine is efficient and convenient.

Description

technical field [0001] The invention relates to a fault diagnosis instrument for an EFI system of a national VI engine, belonging to the technical field of engine testing. Background technique [0002] At present, most of the models that meet the National VI emissions are in the EFI development stage, and the corresponding OBD (Online Fault Diagnosis) development is also being carried out at the same time. Many EFI parameter data presets in the ECU (Electronic Control Unit) have not been completely locked. As a result, the fault diagnosis module cannot be solidified, and the fault inspection during the bench test can only rely on calibration systems such as INCA (a software for calibrating engine electronic control units produced by ETAS Company in Germany), which occupies calibration resources and is time-consuming and laborious for diagnosis. Quickly read data flow and fault information of core parameters. Contents of the invention [0003] The purpose of the present in...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a fault diagnosis instrument for the EFI system of the National VI engine to solve the problem that the existing fault diagnosis module cannot be solidified, the fault diagnosis system occupies calibration resources, the diagnosis is time-consuming and laborious, and the data flow and data flow of the core parameters cannot be quickly read. fault message problem

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