Method and system for on-line monitoring car engine state

An automotive engine and monitoring system technology, which is applied in engine testing, machine/structural component testing, measuring devices, etc., can solve the problems of difficult sensor installation, too many test points and monitoring quantities, and inability to realize on-board monitoring. Achieve the effect of solving poor system stability, low cost and easy installation

Inactive Publication Date: 2008-08-27
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0006] The present invention aims to solve the problems of too many test points and monitoring quantity, difficult installati

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  • Method and system for on-line monitoring car engine state
  • Method and system for on-line monitoring car engine state
  • Method and system for on-line monitoring car engine state

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Embodiment Construction

[0035] Such as figure 1 Shown is a system composition diagram of an implementation of the on-line monitoring system of the automobile engine state of the present invention. The system includes a data acquisition module, a data processing module, an exhaust pressure fluctuation spectrum library, a pattern recognition module, a fault detection module and a control module.

[0036] The system composition and working principle of an implementation of the on-line monitoring system for automobile engine status of the present invention will be described in detail below:

[0037] The data acquisition module is a pressure sensor located on the inside of the exhaust pipe of the car. If the pressure sensor is located at the front end of the noise suppressor and catalytic converter, it can sensitively capture the signal of pressure fluctuations and effectively improve the detection capability of the system; if the pressure sensor is located behind the noise suppressor and catalytic converter, ...

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Abstract

The invention relates to an automobile engine state on-line monitoring method and a system thereof. Through analyzing the form and transmission of exhaust fluctuation in an exhaust system of an engine, an exhaust fluctuation signal is researched, such as the relation between an exhaust pressure fluctuation signal and engine operation; on the basis of recording and analyzing the fluctuation of the exhaust system, the automobile engine state on-line monitoring method and the system thereof which can accurately realize the on-line monitoring of the automobile engine are obtained by adopting a few detection projects. The system can acquire general engine working conditions by less detection amount, detect and diagnose the fault of the automobile engine, thereby realizing the on-line monitoring of the automobile engine. The intelligent fluctuation detection system can be used as a powerful tool for the optimal control of the engine and has long-term application prospect in terms of the fault diagnosis of an internal-combustion engine and the optimal control and the noise control of the automobile engine.

Description

(1) Technical field: [0001] The invention relates to an engine state monitoring method and system, in particular to an on-line monitoring method and system of an automobile engine state. (2) Background technology: [0002] The automobile engine is a very complex mechanical, electrical, and hydraulic system, consisting of two major mechanisms (crank connecting rod mechanism, valve mechanism) and five major systems (fuel supply system, cooling system, lubrication system, ignition system, and starting system). There are many types of failures, and the relationship between failure phenomena and causes is also complicated, which may be one-to-many, many-to-one, or many-to-many relationships. Different faults are manifested in different ways. Therefore, what kind of detection object to choose, what parameters to detect, and how to carry out signal analysis and data processing are the main problems to be solved in condition monitoring and fault diagnosis. [0003] Traditional engine per...

Claims

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Application Information

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IPC IPC(8): G01M15/00
Inventor 许勇张向文陈溢文潘明樊永显
Owner GUILIN UNIV OF ELECTRONIC TECH
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