An off-line starting harness device for a portable generator

Abstract

The utility model discloses a kind of off-line starting wiring harness devices for portable generator, it is related to generator circuit control technical field.New device adopts this wiring harness to enable engine to be off the car start-stop test;Collaborate test platform or OBD display control terminal can realize engine performance test.

Description

Technical Field

[0001] This utility model discloses an offline starting harness device for portable generators, relating to the field of generator circuit control technology. Background Technology

[0002] Currently, construction machinery engines are gradually evolving from direct injection to electronic fuel injection (EFI) engines. Traditional performance testing of EFI engines requires either using the manufacturer's provided testing equipment or removing connecting cables and accelerator pedals from the original machinery. The former approach is inefficient due to the diverse range of construction machinery models, requiring a separate testing system for each model, while the latter involves numerous steps, is time-consuming and labor-intensive, and easily damages cables. Therefore, it is necessary to develop a portable wiring harness device suitable for performance testing of EFI engines. Utility Model Content

[0003] This utility model addresses the problems of the prior art by providing an offline starting harness device for portable generators. The technical solution adopted is as follows: In a first aspect, an offline starting harness for a portable generator includes: a key switch, an OBD communication port, a starter motor signal terminal, power supply positive and negative terminals, and a remote throttle knob; The starter motor signal terminal and the key switch are connected by a signal connection, and the positive and negative terminals of the power supply are respectively connected to the key switch and the power port. The key switch is connected to the OEM port of the computer board; The circuit connection between the OEM port and the OBD communication port of the computer board; The signal line is connected between the OEM port of the computer board and the remote throttle knob.

[0004] In some implementations, the key switch includes an OFF position, an ON position, and a START position; The STRAT stop is connected to the starter motor signal terminal via a signal line; The ON position is connected to the ignition signal line of the OEM port via a signal line, and the ignition signal line is terminal 39. The OFF position is simultaneously connected to the positive terminal of the power supply via a signal line.

[0005] In some implementations, ports 03 and 34 of the ignition signal line of the OEM port are connected.

[0006] In some implementations, the line connection between the OEM port and the OBD communication port of the computer board includes: Ports 47, 47, and 37 of the OEM port are connected to the OBD communication port via SAE J1939+, SAE J1939-, and shielded wires, respectively. SAE J1939+ and SAE J1939- represent data transmission via differential signals on the CAN bus. Specifically, SAE J1939+ indicates a voltage of 3.5V in the dominant state, and SAE J1939- indicates a voltage of 1.5V in the dominant state.

[0007] In some implementations, the signal line connection between the OEM port of the computer board and the remote throttle knob includes: Ports 21, 26, and 32 of the OEM port are simultaneously connected to the remote throttle knob.

[0008] One or more embodiments of this utility model can bring at least the following beneficial effects: the new device can realize engine start-stop test when using this wiring harness; and can realize engine performance test when combined with a test platform or OBD display and control terminal. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a structural topology diagram of an offline starting harness device for a portable generator provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of some interfaces of the generator computer board provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the wire sequence number of the 50-pin Deutsch terminal provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the wiring sequence of the 4-pin power terminal provided in this embodiment of the utility model. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0012] Example 1: Figure 1 A structural topology diagram of an offline starting harness device for a portable generator is shown, as follows: Figure 1 As shown, this embodiment provides an offline starting harness device for a portable generator, including: Key switch, OBD communication port, starter motor signal terminal, power supply positive and negative terminals, and remote throttle knob; The starter motor signal terminal and the key switch are connected by a signal connection, and the positive and negative terminals of the power supply are respectively connected to the key switch and the power port. The key switch is connected to the OEM port of the computer board; The circuit connection between the OEM port and the OBD communication port of the computer board; The signal line is connected between the OEM port of the computer board and the remote throttle knob.

[0013] This wiring harness is suitable for Cummins QSB6.7 engines, such as... Figure 2 As shown, the engine control unit (ECU) model is CM850. Figure 3 As shown, there are two terminals for connecting to the computer board: a 50-pin connector (50-pin Dechter connector) and a 4-pin power supply terminal (positive and negative terminals), where pins 1 and 2 are connected to the negative power supply and pins 3 and 4 are connected to the positive power supply.

[0014] Furthermore, the key switch includes an OFF position, an ON position, and a START position; The STRAT stop is connected to the starter motor signal terminal via a signal line; The ON position is connected to the ignition signal line of the OEM port via a signal line, and the ignition signal line is terminal 39. The OFF position is simultaneously connected to the positive terminal of the power supply via a signal line.

[0015] Furthermore, ports 03 and 34 of the ignition signal line of the OEM port are connected.

[0016] Furthermore, the wiring connection between the OEM port and the OBD communication port of the computer board includes: Ports 47, 47, and 37 of the OEM port are connected to the OBD communication port via SAE J1939+, SAE J1939-, and shielded wires, respectively.

[0017] Furthermore, the signal line connection between the OEM port of the computer board and the remote throttle knob includes: Ports 21, 26, and 32 of the OEM port are simultaneously connected to the remote throttle knob.

[0018] When this new device is working, if the engine's main computer board, accelerator pedal, or knob malfunctions, the engine can be started, stopped, and its speed controlled by disconnecting the OEM wiring harness and the power wiring harness and connecting this wiring harness. Secondly, when the engine is removed from the vehicle, the matching wiring harness and accelerator pedal do not need to be removed from the original vehicle; after connecting this wiring harness, start-stop and speed control can be achieved.

[0019] The remote throttle knob controls the engine throttle opening from 0-100%. Three sets of wires connect the throttle knob to lines 21, 26, and 32 of the 50-pin terminal on the computer board. When the computer board is powered on, it provides a 5V output power to the throttle knob. Line 26 is a position signal line that collects the voltage signal of the throttle knob position and sends it to the computer board to control the engine speed.

[0020] It has a reserved OBD port for fault diagnosis, which can be connected to Cummins' dedicated diagnostic tool INSITE to observe and diagnose engine operating parameters, calibrate and rewrite the ECU program, and modify and set engine parameters. Engine operating parameters can also be observed via an external display connected through the CAN bus.

[0021] The power clip uses red and black to distinguish the positive and negative terminals, and an external power source can be used to supply power to the circuit.

[0022] The key switch has three positions: OFF, ON, and STRAT, which control the power supply and engine start. In the STRAT position, one signal wire is connected to the starter motor signal terminal, and in the ON position, another wire is connected to terminal 39, which is the ignition signal wire of the computer board.

[0023] Short-circuit ports 03 and 34 to use a remote throttle switch, avoiding the need to remove the throttle pedal from the original vehicle.

[0024] In the several embodiments provided in this utility model, it should be understood that the disclosed system and method can also be implemented in other ways. The system and method embodiments described above are merely illustrative.

[0025] It should be noted that, in this document, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although the embodiments disclosed in this utility model are as described above, the content described is merely for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. An offline starting harness device for a portable generator, characterized in that, include: Key switch, OBD communication port, starter motor signal terminal, power supply positive and negative terminals, and remote throttle knob; The starter motor signal terminal and the key switch are connected by a signal connection, and the positive and negative terminals of the power supply are respectively connected to the key switch and the power port. The key switch is connected to the OEM port of the computer board; The circuit connection between the OEM port and the OBD communication port of the computer board; The signal line is connected between the OEM port of the computer board and the remote throttle knob.

2. The apparatus according to claim 1, characterized in that, The key switch includes an OFF position, an ON position, and a START position; The STRAT stop is connected to the starter motor signal terminal via a signal line; The ON position is connected to the ignition signal line of the OEM port via a signal line, and the ignition signal line is terminal 39. The OFF position is simultaneously connected to the positive terminal of the power supply via a signal line.

3. The apparatus according to claim 1, characterized in that, The 03 and 34 ports of the OEM port are connected.

4. The apparatus according to claim 1, characterized in that, The connection between the OEM port and the OBD communication port of the computer board includes: Ports 47, 47, and 37 of the OEM port are connected to the OBD communication port via SAE J1939+, SAE J1939-, and shielded wires, respectively.

5. The apparatus according to claim 1, characterized in that, The signal line connection between the OEM port of the computer board and the remote throttle knob includes: Ports 21, 26, and 32 of the OEM port are simultaneously connected to the remote throttle knob.

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