CN202081976U

CN202081976U - Pressure detection and fault diagnosis device for diesel engine cylinder

Info

Publication number: CN202081976U
Application number: CN2011201305973U
Authority: CN
Inventors: 赵岩; 姜艳秋; 王笃亭; 王东辉; 赵勇; 董亚娟
Original assignee: Heilongjiang University of Science and Technology
Current assignee: Heilongjiang University of Science and Technology
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2011-12-21
Anticipated expiration: 2021-04-28

Abstract

The utility model relates to a pressure detection and fault diagnosis device for a diesel engine cylinder. The influence of the diesel engine cylinder pressure to the engine performance is greatly; if the cylinder pressure is decreased, the dynamic property and economical efficiency of the engine are descended so as to cause a series of faults of engine running disability, oil consumption increase, starting difficulty, and the like; and the signal of the cylinder pressure is detected so as to judge whether the sealing properties of a piston ring, an air valve, a cylinder head gasket and the like are good and whether the gap adjustment of the air valve is proper. The pressure detection and fault diagnosis device for a diesel engine cylinder comprises a sensor (1); the sensor is connected with a signal preprocessor (2); the signal preprocessor is connected with a singlechip (3); and the singlechip is connected with a host computer (4). The device is used for the manufacturing, detection and maintenance of diesel engine.

Description

Diesel engine cylinder Pressure testing and fault diagnosis apparatus

Technical field:

The utility model relates to a kind of mechanical field, is specifically related to a kind of diesel engine cylinder Pressure testing and fault diagnosis apparatus.

Background technique:

Diesel engine cylinder pressure to the engine performance influence greatly, if cylinder pressure reduces, can cause engine power performance, Economy to descend, cause a series of faults such as locomotive driving is unable, oil consumption increase, starting difficulty, and by detecting cylinder pressure signal, can judge whether sealing such as piston ring, valve, head gasket is good, and whether suitable the valve clearance adjustment etc.

Summary of the invention:

The purpose of this utility model provides the device that a kind of direct measurement in-cylinder pressure signal is implemented the fault diagnosis device, to saving fuel oil, reduce the NOX discharging and realizing that the diesel engine fault early alert has played decisive action.

Above-mentioned purpose realizes by following technological scheme:

A kind of diesel engine cylinder Pressure testing and fault diagnosis apparatus, its composition comprises: sensor, described sensor connects signal preprocessor, and described signal preprocessor connects single-chip microcomputer, and described single-chip microcomputer connects upper-position unit.

Described diesel engine cylinder Pressure testing and fault diagnosis apparatus, described upper-position unit comprises fault diagnosis device and fault database.

Beneficial effect:

1. the utility model is saved fuel oil, has been reduced the NOX discharging, has realized the diesel engine fault early alert, can directly measure the in-cylinder pressure signal and implement Fault Diagnosis.

2. the utility model can detect the cylinder pressure or the injection pressure of 12 cylinders simultaneously, and application prospect is very considerable.

3. the utility model has been realized functions such as real-time collection, analysis, processing, demonstration; Do not need to disintegrate and promptly carry out state-detection, fault diagnosis.

4. the utility model has been used fuzzy control, and the speed and the degree of accuracy that recover pressure waveform are higher.

Description of drawings:

Accompanying drawing 1 is the structural representation of this product.

Accompanying drawing 2 is circuit diagram of accompanying drawing 1.

Embodiment:

Embodiment 1:

A kind of diesel engine cylinder Pressure testing and fault diagnosis apparatus, its composition comprises: sensor 1, described sensor 1 connects signal preprocessor 2, and described signal preprocessor 2 connects single-chip microcomputer 3, and described single-chip microcomputer 3 connects upper-position unit 4.

Embodiment 2:

Embodiment's 1 described diesel engine cylinder Pressure testing and fault diagnosis apparatus, described upper-position unit 4 comprises fault diagnosis device 5 and fault database 6.Same-sign has annexation in the circuit.

Embodiment 3:

Embodiment 1 or 2 described diesel engine cylinder Pressure testing and fault diagnosis apparatuses, single-chip microcomputer is sent to upper-position unit with the data of gathering by serial port.The cylinder pressure waveform is handled and recovered to upper-position unit with the data of gathering, waveform is analyzed and judged, and compare with data in the fault database, the working state and the fault type of current diesel engine are judged in the utilization fuzzy control, and propose diagnostic comments.

Claims

1. diesel engine cylinder Pressure testing and fault diagnosis apparatus, its composition comprises: sensor is characterized in that: described sensor connects signal preprocessor, and described signal preprocessor connects single-chip microcomputer, and described single-chip microcomputer connects upper-position unit.

2. diesel engine cylinder Pressure testing according to claim 1 and fault diagnosis apparatus is characterized in that: described upper-position unit comprises fault diagnosis device and fault database.