CN210769035U

CN210769035U - Diesel engine overspeed monitoring and recording device

Info

Publication number: CN210769035U
Application number: CN201921830186.8U
Authority: CN
Inventors: 翟霄雁; 孙广迪; 路志强; 胡开建
Original assignee: Sinotruk Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-16
Anticipated expiration: 2029-10-29

Abstract

In order to solve the problems that the failure reason CAN not be analyzed and the modification of the existing monitoring device is complicated because the parameters such as the overspeed rotating speed, the overspeed time length and the like of the vehicle are not recorded, the utility model provides an overspeed monitoring and recording device for a diesel engine and the vehicle, which mainly comprises a microprocessor with the functions of detecting and recording and comparing, a CAN bus transceiver for reading the rotating speed signal of the engine, the running mileage of the vehicle and the speed information of the vehicle, a timing module for recording the overspeed time length of the vehicle, and a storage module for storing the highest rotating speed of the engine, the overspeed time length, the running mileage of the vehicle and the speed information of the vehicle when a plurality of groups of data with the highest rotating speed of the engine occur, the CAN bus transceiver is connected with an engine ECU through a CAN line, the signal input end of the microprocessor, the signal output end of the microprocessor is connected with the storage module.

Description

Diesel engine overspeed monitoring and recording device

Technical Field

The utility model belongs to the technical field of the engine monitoring, especially, relate to a diesel engine hypervelocity control and recorder.

Background

The cylinder cover of the diesel engine can be broken after being overspeed for a plurality of times for a long time, even serious accidents are caused, and great economic loss and serious potential safety hazards are generated. The prior art can report faults when the engine is overspeed, but for example, under the working condition of downhill, the engine does not spray oil, and the overspeed condition is difficult to limit. And after-sale maintenance only can see the history of once overspeed, and the actual overspeed rotating speed and overspeed duration of the engine are not recorded, so that the overspeed degree and overspeed times cannot be traced. In order to better understand the user use characteristics and the analysis of the related after-market fault reasons, a technology for monitoring and recording the overspeed condition of the engine is urgently needed.

Disclosure of Invention

In order to solve the problem, the utility model provides a diesel engine hypervelocity control and recorder, the technical scheme of adoption as follows:

a diesel engine overspeed monitoring and recording device is characterized by mainly comprising:

a microprocessor having a detection recording function and a comparison function;

the CAN bus transceiver is used for reading an engine rotating speed signal, vehicle driving mileage and vehicle speed information;

the timing module is used for recording the overspeed time length of the vehicle;

the storage module is used for storing the highest engine speed, the overspeed duration, the vehicle mileage and the vehicle speed when a plurality of groups of data with the highest engine speed occur, and an engine speed value n is preset in the storage module_Set；

The CAN bus transceiver is connected with the engine ECU through a CAN line, the signal input end of the microprocessor is connected with the signal output end of the CAN bus transceiver, the timing module is connected with the signal input end of the microprocessor, and the signal output end of the microprocessor is connected with the storage module.

Preferably, the storage module is further provided with a storage unit for storing the accumulated number of overspeed times and the overspeed duration during the operation of the engine.

The beneficial effects of the utility model reside in that: the monitoring and recording functions are integrated, the structure is simple, the reliability is high, and the method is suitable for large-scale popularization and application in the field of diesel engines; the CAN line is connected with the engine ECU, so that the circuit of the whole vehicle is changed slightly, and the diesel engine and the vehicle CAN be conveniently modified and upgraded.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

The system comprises an ECU (electronic control Unit), a 2-CAN (controller area network) line, a 3-CAN bus transceiver, a 4-microprocessor, a 5-timing module and a 6-storage module.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The diesel engine overspeed monitoring and recording device as shown in fig. 1 mainly comprises a CAN bus transceiver 3, a microprocessor 4, a timing module 5 and a storage module 6, wherein the CAN bus transceiver 3 is connected with an engine ECU1 through a CAN line, a signal input end of the microprocessor 4 is connected with signal output ends of the timing module 5 and the CAN bus transceiver, a signal output end of the microprocessor 4 is connected with the storage module 6, and an allowable engine maximum rotating speed n is preset in the storage module 6_Set。

In this embodiment, the microprocessor adopts MC9S12XEP100, the CAN bus transceiver 3 reads the engine speed signal, the vehicle mileage and the vehicle speed information through the CAN line, and the microprocessor 4 monitors that the engine speed is higher than the set value n_Set+n_HiIn time, the engine book is recorded through the timing module 5Initial time t of sub-overspeed₀When the engine speed is lower than a set value n_Set-n_LoIn time, the end time t of the current overspeed of the engine is recorded by the timing module 5₁If the engine overspeed time T is T₁-t₀. Wherein n is_HiAnd n_LoIs arranged to take account of fluctuations in engine speed, while recording the maximum speed n reached by the engine during this period_MaxAnd the vehicle driving mileage L and the vehicle speed V at the moment of occurrence of the highest rotating speed.

When the storage module stores ten groups of data, the microprocessor 4 compares the overspeed data with the ten groups of overspeed data stored in the storage module 6, and the engine overspeed maximum speed n is generally used_MaxOr the overspeed period T is the criterion. Taking the maximum rotational speed of overspeed engine as an example, if the maximum rotational speed of overspeed engine is higher than the maximum rotational speed of overspeed engine stored in the storage module 6, the overspeed data (including the maximum rotational speed n of overspeed) is obtained_MaxThe overspeed duration T, the vehicle mileage L and the vehicle speed V) will be stored in the storage module 6 instead of the data of a certain overspeed, and if the maximum engine speed of this overspeed is lower than the maximum engine speeds of the ten sets of overspeed data stored in the storage module 6, the overspeed data of this time will not be stored.

The memory module 6 additionally sets the cumulative number of overspeed times N_TotAnd accumulated overspeed duration Ti_TotTwo parameters are used for recording the total overspeed times and overspeed duration in the running process of the engine. When the overspeed occurs, accumulating the overspeed times N_Tot=N_Tot+1, cumulative overspeed duration Ti_Tot=Ti_Tot+T。

The technical scheme integrates monitoring and recording functions, has simple structure and high reliability, is suitable for large-scale popularization and application in the field of diesel engines, is connected with the engine ECU through the CAN wire, has small circuit change of the whole vehicle, and CAN conveniently modify and upgrade the diesel engines and the vehicles.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A diesel engine overspeed monitoring and recording device is characterized by mainly comprising:

2. The diesel engine overspeed monitoring and recording device as set forth in claim 1, wherein said storage module is further provided with a storage unit for storing the cumulative number of overspeed times and the length of overspeed periods during engine operation.