CN217637996U

CN217637996U - Multifunctional diagnosis wire harness applied to diesel engine

Info

Publication number: CN217637996U
Application number: CN202221082349.0U
Authority: CN
Inventors: 杨汉辉; 赵庆飞; 丁光耀; 何述超
Original assignee: Kunming Yunnei Power Co Ltd
Current assignee: Kunming Yunnei Power Co Ltd
Priority date: 2022-05-08
Filing date: 2022-05-08
Publication date: 2022-10-21
Anticipated expiration: 2032-05-08

Abstract

The utility model relates to a multifunctional diagnostic harness applied to a diesel engine, belonging to the technical field of engines, which comprises an OBD diagnostic interface, an upper power supply switch, a power supply negative clamp, a power supply positive clamp, an ECU connecting plug and a DCU connecting plug; the power supply positive clamp and the power supply negative clamp are respectively connected with the positive electrode and the negative electrode of the power supply battery; the power-on power switch is connected between the anode of the power supply battery and the ECU connecting plug through a wire harness; the ECU connecting plug is connected to an engine controller ECU through a wire harness; the DCU connecting plug is connected to the ECU through a wire harness; the utility model discloses can realize detecting when engine controller ECU and aftertreatment controller DCU with an engine diagnosis pencil simultaneously, realize the connection of two kinds of controllers and power, computer, simple structure has effectively reduced engine diagnosis pencil kind, has reduced the detection cost, and the communication is reliable, and convenient to carry improves detection efficiency.

Description

Multifunctional diagnosis wire harness applied to diesel engine

Technical Field

The utility model belongs to the technical field of the engine, specific theory relates to a be applied to diesel engine's multi-functional diagnosis pencil.

Background

In order to meet the requirements of automobile exhaust emission, the importance of diesel engine emission indexes is particularly outstanding, in order to realize more accurate control of engine performance indexes, a large number of control units are applied to an automobile, and testers need to calibrate, detect and write data of various control units through computer equipment in development, batch production and after-sales service of the engine. And single controller is connected by single diagnosis pencil more, and current single function diagnosis pencil has following shortcoming: firstly, the automobile is provided with various control units, a plurality of diagnosis wire harnesses are required to be provided, and each diagnosis wire harness detects one control unit, so that the cost is high; secondly, the connection relation of the single diagnosis wire harness is complex, and the fault of non-communication is caused by the matching wiring error easily occurring when the diagnosis equipment is connected; thirdly, a single diagnosis wire harness has a single function, so that two control units, namely an engine control unit ECU (electronic control unit) and a post-processing unit DCU (distributed control unit) cannot be detected simultaneously through the single diagnosis wire harness, and the diagnosis and writing efficiency is low.

Disclosure of Invention

In order to overcome the problem that exists among the background art, the utility model provides a be applied to diesel engine's multi-functional diagnosis pencil can realize detecting and data brush writing simultaneously engine controller ECU and aftertreatment controller DCU with an engine diagnosis pencil, realize the connection of two kinds of controllers and power, computer, moreover, the steam generator is simple in structure, engine diagnosis pencil kind and quantity have effectively been reduced, the detection cost is reduced, and the communication is reliable, and convenient to carry, the improvement detects the efficiency of brush writing.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the multifunctional diagnostic wiring harness applied to the diesel engine comprises an OBD diagnostic interface, an upper power supply switch, a power supply negative clamp, a power supply positive clamp, an ECU connecting plug and a DCU connecting plug; the power supply positive clamp and the power supply negative clamp are respectively connected with the positive electrode and the negative electrode of the power supply battery; the power-on power switch is connected between the anode of the power supply battery and the ECU connecting plug through a wire harness; the ECU connecting plug and the DCU connecting plug are respectively connected with an engine control unit ECU and a post-processing unit DCU through wire harnesses; the OBD diagnosis interface is connected with the ECU connecting plug and the DCU connecting plug through the wiring harness respectively.

Preferably, the system further comprises an ECU power-on fuse and an ECU power supply fuse for the wire harness protection; the ECU power-on fuse is connected between the power-on power switch and the ECU connecting plug through a wire harness; the ECU power supply fuse is connected between the power supply positive clamp and the ECU connecting plug through a wire harness.

Preferably, the OBD diagnosis interface is connected with a computer.

The utility model has the advantages that:

the utility model discloses can realize detecting and data brush write when engine controller ECU and aftertreatment controller DCU simultaneously with a diagnosis pencil, reduce the engine diagnosis pencil kind, simplify the relation of connection that detects the pencil, the cost is reduced improves diagnosis work efficiency, and the communication is reliable, convenient to carry.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

in the figure, 1-ECU connecting plug, 2-ECU power-on fuse, 3-ECU power supply fuse, 3, 4-DCU connecting plug, 4-OBD diagnosis interface, 6-power-on power switch, 7-power negative clamp and 8-power positive clamp.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in fig. 1, the multifunctional diagnostic harness applied to the diesel engine comprises an ECU power-on fuse 2, an ECU power-supply fuse 3, an OBD diagnostic interface 5, a power-on power switch 6, a power negative clamp 7, a power positive clamp 8, a DCU connection plug 4 and an ECU connection plug 1.

The power supply positive clamp 8 and the power supply negative clamp 7 are respectively connected with the positive electrode and the negative electrode of the power supply battery through the crocodile clamps to supply power for the engine controller ECU and the post-processing controller DCU. The power-on power switch 6 is connected to the anode of the power supply battery through a crocodile clip and is connected with the ECU connecting plug 1 through an electric wire harness, so that the power-on and power-off control function is realized for the ECU of the engine controller; the ECU connection plug 1 is connected to the engine controller ECU through a wire harness for transmitting information of the engine controller ECU to the OBD diagnostic interface 5. The DCU connection plug 4 is connected to the post-processing controller DCU through a wire harness, and is used for transmitting information of the post-processing controller DCU to the OBD diagnosis interface 5.

The ECU power-on fuse 2 is connected between the power-on power switch 6 and the ECU connecting plug 1 through a wire harness, and when the instantaneous current exceeds 10A in the power-on process, the fuse in the ECU power-on fuse 2 is burnt and the circuit is disconnected. The short circuit fault caused by overlarge current of the wire harness when the ECU is electrified is avoided; ECU power supply insurance 3 is connected between the positive clamp 8 of power and ECU connecting plug 1 through the electric wire harness, and when engine control unit ECU work instantaneous current exceeded 30A, the fuse of ECU power supply insurance 3 the inside can burn out, prevented that engine control unit ECU from burning out inside electronic component because of the electric current is too high, arouse the major accident of conflagration because of the electric wire harness short circuit even to play the effect of protection engine control unit ECU normal work.

The OBD diagnosis interface 5 is respectively connected with the ECU connecting plug 1 and the DCU connecting plug 4 through a wire harness, and then is connected with a computer to transmit data of the ECU and the DCU to the computer.

The utility model discloses a working process: the power-on power switch 6 and the power positive clamp 8 are connected with the positive pole of the power battery, the power negative clamp 7 is connected with the negative pole of the power battery, and the ECU connecting plug 1 and the DCU connecting plug 4 are respectively connected with the ECU and the post-processing controller DCU. The ECU power supply fuse 2 is connected between the power supply switch 6 and the ECU connecting plug 1 through a wire harness, and the ECU power supply fuse 3 is connected between the power supply positive clamp 8 and the ECU connecting plug 1 through a wire harness, so that the whole diagnosis wire harness and the electric control unit are protected. After the components are connected respectively, the engine control unit ECU and the post-processing controller DCU can work normally. The OBD diagnosis interface 5 is connected with a computer, and through special calibration software such as INCA, yiboda and the like, the diagnosis wiring harness CAN simultaneously complete engine diagnosis and post-processing diagnosis, and CAN also perform CAN message acquisition and calibration data modification and flashing work through the calibration software.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. A multi-functional diagnosis pencil of being applied to diesel engine which characterized in that: the system comprises an OBD diagnosis interface (5), a power-on power switch (6), a power negative clamp (7), a power positive clamp (8), an ECU connecting plug (1) and a DCU connecting plug (4); the power supply positive clamp (8) and the power supply negative clamp (7) are respectively connected with the positive electrode and the negative electrode of the power supply battery; the power-on power switch (6) is connected between the anode of the power supply battery and the ECU connecting plug (1) through a wire harness; the OBD diagnosis interface (5) is respectively connected with the ECU connecting plug (1) and the DCU connecting plug (4) through a wire harness; and the ECU connecting plug (1) and the DCU connecting plug (4) are respectively connected with an engine control unit ECU and a post-processing unit DCU through electric wire harnesses.

2. The multifunctional diagnostic harness for a diesel engine as set forth in claim 1, wherein: the system also comprises an ECU power-on fuse (2) and an ECU power supply fuse (3) for protecting the wire harness; the ECU power-on fuse (2) is connected between the power-on power switch (6) and the ECU connecting plug (1) through a wire harness; the ECU power supply fuse (3) is connected between the power positive clamp (8) and the ECU connecting plug (1) through a wire harness.

3. The multifunctional diagnostic harness for a diesel engine as set forth in claim 1, wherein: the OBD diagnosis interface (5) is connected with a computer.