Fire engine fault diagnosis analysis - manufacturer for your detailed introduction

First, the basic concept of fire engine fault diagnosis

1. The fire engine is faulty

The failure of a fire engine is a phenomenon in which the parts of the vehicle or the vehicle are completely incapacitated. In essence, the matching state of auto parts or parts has changed abnormally.

2. Fault classification of fire engines

According to different classification purposes, automobile fault classification is varied, and the commonly used fault classification methods are as follows:

(1) Local failure and complete failure can be based on the working capacity of the car department failure and complete failure.

(2) The consequences of failure can be divided into minor fault, general fault, serious fault and fatal fault.

(3) According to the nature of the fault can be divided into natural fault and artificial fault.

(4) The fault speed can be divided into sudden fault and progressive fault.

(5) Continuous fault and intermittent fault can be stable fault according to the fault performance.

(6) can be divided into visibility fault and potential fault.

3. Fault diagnosis of fire engine

Fire engine fault diagnosis refers to determining the technical status of the fire engine and finding out the fault location and cause without disassembling (or only removing some small parts).

Three, fire truck fault diagnosis parameters

Fault diagnosis of fire engine is an application technology to determine the technical status of the vehicle. It not only needs perfect detection, analysis, judgment means and methods, but also needs correct theoretical guidance. Therefore, when diagnosing and detecting the technical condition of fire engines, it is necessary to select the appropriate diagnostic parameters to determine the reasonable diagnostic parameter standard and the best diagnostic cycle.

Diagnostic parameters

The diagnostic parameters of the fire engine refer to the number used for diagnosis and represent the technology of the fire engine, assembly and mechanism, including working parameters, accompanying parameters and geometric parameters.

1. Working process parameters

Operating parameters are the physical and chemical output of the vehicle, assembly and mechanism during operation.

2. Accompanying process parameters

Adjoint process parameters are measurable parameters associated with the output of a working process.

(2) Diagnostic parameter standards

The diagnostic standard of water tank fire truck is a unified regulation of the diagnostic methods, technical requirements and limits of fire trucks. Diagnostic parameter standard is only the unified regulation of diagnostic parameter limit. It is part of the diagnostic criteria, sometimes called diagnostic criteria.

The diagnostic criteria usually start from the initial value Pf, allowable value Pd and limit value Pn.

1. Initial value Pf

The initial value Pf is equivalent to the diagnostic parameter values of new and repaired cars without faults. When the measured values of diagnostic parameters are within the initial range, it indicates that the diagnostic object has good technical status and can continue to run without maintenance.

2. Allowable value Pd

Pd of diagnostic parameters is within the range. Although the technical status of the diagnostic object has changed, it is still normal and can continue to run without maintenance.

3. Limit value Pn

When the diagnostic parameter Pn exceeds the limit value, the technical condition of the diagnostic object deteriorates seriously, and the maintenance should be stopped immediately. So as not to cause more damage.