A portable fuel injection drive load simulation device for diesel engine electronic control system

Abstract

The present invention provides a portable fuel injection driven load simulation device for a diesel engine electronic control system, comprising a box frame, a detection switch panel, a rear panel, a left side panel, a right side panel, an upper cover plate, a lower cover plate, a power distribution board, a solenoid valve mounting plate and a handle. The power distribution board and the solenoid valve mounting plate are installed in the box frame, the detection switch panel is installed at the front end of the box frame, a handle is installed on both sides of the front end of the box frame, the rear panel is installed at the rear end of the box frame, the left side panel and the right side panel are installed on both sides of the box frame, and the upper cover plate and the lower cover plate are installed on the upper and lower sides of the box frame. The present invention has the following beneficial effects: it can realize the detection output of the fuel injection driving current; the suction sound generated when the fuel injection driving simulated load solenoid valve is working is loud, which can obviously reflect the working state of the simulated load solenoid valve; at the same time, the device has high integration and is easy to move and carry; the fault simulation injection is easy to operate, and there is no need to artificially short-circuit or open the wiring of the simulated load.

Description

Technical Field

[0001] The invention belongs to the technical field of diesel engine electronic control, and in particular relates to a portable fuel injection drive load simulation device for a diesel engine electronic control system. Background Art

[0002] During the development, testing and environmental testing of high-pressure common rail or single pump diesel engine controllers, debugging and testing the controller's injection drive function is a necessary step. At present, the injection drive simulation loads used for debugging and testing are generally physical electronic fuel injectors or simulation components with load characteristics. The above simulation loads have single functions, lack protection, are not easy to carry, and do not have the function of detecting drive current; when the above simulation loads are working, the solenoid valve suction sound is small and cannot clearly reflect its working status (working or not working); when performing fault simulation injection testing on each injection drive signal channel, it is necessary to manually short-circuit or open the wiring of the simulation load, which is extremely inconvenient and prone to electrical connection errors. Summary of the invention

[0003] In view of this, the present invention aims to provide a portable fuel injection driven load simulation device for a diesel engine electronic control system to solve the shortcomings of the existing fuel injection driven simulated load.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A portable fuel injection driven load simulation device for a diesel engine electronic control system comprises a box frame, a detection switch panel, a rear panel, a left side panel, a right side panel, an upper cover plate, a lower cover plate, a power distribution board, a solenoid valve mounting plate and a handle. The power distribution board and the solenoid valve mounting plate are installed in the box frame, and the power distribution board and the solenoid valve mounting plate are arranged in parallel. The detection switch panel is installed at the front end of the box frame, a handle is installed at both sides of the front end of the box frame, a rear panel is installed at the rear end of the box frame, a left side panel and a right side panel are installed at both sides of the box frame, and an upper cover plate and a lower cover plate are installed at the upper and lower sides of the box frame.

[0006] Furthermore, it also includes a number of high-speed solenoid valves, and two rows of parallel solenoid valve mounting and fixing holes are opened on the solenoid valve mounting plate. The solenoid valve mounting and fixing holes adopt a riveted nut structure, and the fixing nut is located on the lower surface of the mounting plate, and the solenoid valve suction surface is located on the upper surface of the mounting plate; the solenoid valve is installed and fixed by connecting the fixing nut with a long screw passing through the solenoid valve's own mounting hole.

[0007] Furthermore, it also includes a circular thin iron sheet 11. A circular groove is stamped on the mounting plate 9 just below the suction surface of each high-speed solenoid valve 12, and a circular thin iron sheet 11 is placed in the groove.

[0008] Furthermore, 12 toggle switches and 16 buttons are installed on the surface of the detection switch panel. The toggle switches are used to control the high-speed solenoid valve wiring to be open-circuited, and the buttons are used to control the high-speed solenoid valve wiring to be short-circuited or the common end of the solenoid valve to be short-circuited with the power supply / power ground.

[0009] Furthermore, the upper cover plate and the lower cover plate have the same structure, both of which are rectangular parallelepiped structures.

[0010] Furthermore, the rear panel includes a panel body, an electronic control system injection solenoid valve drive input socket, an electronic control system 24VDC power input socket, a current transformer output socket, and a 220VAC AC power input socket. The panel body is installed to the rear end of the box frame, and the electronic control system injection solenoid valve drive input socket is installed on one side of the panel body surface, and the 220VAC AC power input socket is installed on the other side of the panel body surface. The electronic control system 24VDC power input socket is installed at the lower middle end of the panel body surface, and the current transformer output socket is installed at the upper middle end of the panel body surface.

[0011] Furthermore, the left plate and the right plate are each provided with four Φ4mm through holes for installing a power distribution board and a solenoid valve mounting plate.

[0012] Furthermore, the distribution board includes an electrical board body, a terminal block, a current transformer and a current transformer DC power supply. The electrical board body is installed inside the box frame, and the two sides of the electrical board body are respectively connected to the left board and the right board. A terminal block, two current transformers (for sensing driving current) and a current transformer DC power supply are installed on the surface of the electrical board body.

[0013] Furthermore, the socket on the rear panel, the high-speed solenoid valve on the solenoid valve mounting plate, and the switches and buttons on the detection switch panel are all electrically connected to the system through a distribution board.

[0014] Compared with the prior art, the portable fuel injection driven load simulation device for a diesel engine electronic control system described in the present invention has the following advantages:

[0015] The portable fuel injection drive load simulation device for a diesel engine electronic control system described in the present invention has strong compatibility and can be compatible with the requirements of 12-cylinder, 10-cylinder, 8-cylinder and 6-cylinder diesel engine electronic control systems for fuel injection drive simulation loads; the current transformer output socket is externally connected to an oscilloscope to realize inductive detection of the fuel injection drive current; the structure is compact, the integration is high, the external wiring is simple, and it is easy to move and carry; when the controller simulates the injection of the injector drive solenoid valve failure, the injection of open circuit or short circuit faults can be realized by operating the toggle switch or button on the detection switch panel, and the operation is convenient; the working state of the solenoid valve can be conveniently judged by the obvious suction sound when the solenoid valve is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 Schematic diagrams of the upper and lower cover plates according to the embodiment of the present invention in front view, top view, left and right view;

[0019] Figure 3 This is a schematic diagram of the installation of a high-speed solenoid valve according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the high-speed solenoid valve according to an embodiment of the present invention being installed on a box frame;

[0021] Figure 5 This is a schematic diagram of installing a circular thin iron sheet in a groove according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of a power distribution board according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the internal wiring of the device according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of wiring between the device and an external device or a power supply according to an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Box frame; 2. Detection switch panel; 3. Rear panel; 4. Left side panel; 5. Right side panel; 6. Upper cover; 7. Lower cover; 8. Distribution board; 9. Solenoid valve mounting plate; 10. Handle; 11. Round thin iron sheet; 12. High-speed solenoid valve. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] like Figures 1 to 8As shown, a portable fuel injection drive load simulation device for a diesel engine electronic control system is composed of a solenoid valve mounting plate 9, a detection switch panel 2 (front panel), a rear panel 3, an upper cover plate 6, a lower cover plate 7, a left side panel 4, a right side panel 5, a distribution board 8, a box frame 1, and a handle 10; the solenoid valve mounting plate 9 is installed with high-speed solenoid valves 12 for simulating the operation of the solenoid valves of the diesel engine electronic control fuel injector, and the number is 12, wherein a circular groove is stamped on the mounting plate just below the suction surface of each high-speed solenoid valve 12, and a piece is installed in the groove The circular thin iron sheet 11, when the solenoid valve is working, the circular thin iron sheet 11 will collide with the suction surface of the high-speed solenoid valve 12 under the action of electromagnetic force to produce an obvious suction sound; the detection switch panel 2 is equipped with a toggle switch and a button, the toggle switch adopts a 2-speed 2-pin toggle switch, and is reversely installed on the panel (that is, when the switch handle is turned up, it is in the "off" state, and when the switch handle is turned down, it is in the "on" state), wherein the toggle switch is used to control the high-speed solenoid valve 12 wiring to be open, and the button is used to control the high-speed solenoid valve 12 wiring to be short-circuited or a row of electric The common end of the magnetic valve is short-circuited with the power supply / power ground; the rear panel 3 is equipped with an electronic control system injection solenoid valve drive input socket, an electronic control system 24VDC power input socket, a current transformer output socket, and a 220VAC mains input socket, wherein the electronic control system injection solenoid valve drive input socket is used for the plug of the external controller drive cable to receive the injection solenoid valve drive signal output by the controller, the electronic control system 24VDC power input socket is used for the power supply of the external controller, one end of the current transformer output socket is connected to the output end of the current transformer inside the device, and the other end is used to connect the oscilloscope to realize the function of detecting the driving current waveform, one end of the 220VAC mains input socket is connected to the internal current transformer DC power supply of the device, and the other end is connected to the 220VAC mains input wiring harness plug, which is used to power the current transformer DC power supply; the distribution board 5 is equipped with a wiring row, a current transformer, and a current transformer DC power supply, the wiring row is used for the electrical connection between the internal high-speed solenoid valve 12, the switch / button and the socket on the rear panel, the first current transformer ( Figure 6 The current transformer 1 is used to sense and detect the driving current in the common terminal wiring harness of the A-row solenoid valves. The second current transformer ( Figure 6 The mark in the figure is the current transformer 2) which is used to sense and detect the driving current in the common terminal harness of the B-row solenoid valves. The current transformer power supply is used to convert the 220VAC mains into the DC voltage required by the transformer.

[0032] Beneficial effects of the present invention:

[0033] The present invention has strong compatibility and can meet the requirements of 12-cylinder, 10-cylinder, 8-cylinder and 6-cylinder diesel engine electronic control systems for fuel injection drive simulated loads;

[0034] The current transformer output socket can be connected to an oscilloscope to detect the injection drive current.

[0035] Compact structure, high integration, simple external wiring, and easy to move and carry;

[0036] When the controller simulates the injection of injector drive solenoid valve failure, the injection of open circuit or short circuit faults can be realized by operating the toggle switch or button on the detection switch panel, which is convenient to operate;

[0037] The working status of the solenoid valve can be easily judged by the obvious closing sound when the solenoid valve is working.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, the present invention is a portable box device consisting of a box frame 1, a detection switch panel 2, a rear panel 3, a left side panel 4, a right side panel 5, an upper cover 6, a lower cover 7, a distribution board 8, a solenoid valve mounting plate 9 and a handle 10, wherein the upper and lower covers are the same and can be used interchangeably.

[0040] Figure 1 There are 12 toggle switches and 16 buttons installed on the middle detection switch panel 2, which are used for injector drive solenoid valve fault simulation injection. The toggle switch adopts a 2-stage 2-pin toggle switch and is inverted on the panel (that is, when the switch handle is turned up, it is in the "off" state, and when the switch handle is turned down, it is in the "on" state); the toggle switch is used to control the high-speed solenoid valve wiring open circuit, and the button is used to control the high-speed solenoid valve wiring short circuit or a row of solenoid valves The common end is short-circuited with the power supply / power ground. The wiring relationship between the switch, button, wiring row, and high-speed solenoid valve is shown in Figure 7 shown.

[0041] Figure 1The middle rear panel 3 is equipped with an electronic control system fuel injection solenoid valve drive input socket, an electronic control system 24VDC power input socket, a current transformer output socket, and a 220VAC mains input socket. The electronic control system fuel injection solenoid valve drive input socket adopts a metal electrical connector (compatible with the plug of the electronic control system fuel injector solenoid valve drive cable), which is used for the plug of the external controller drive cable to receive the fuel injection solenoid valve drive signal output by the controller; the electronic control system 24VDC power input socket adopts a 2-core metal electrical connector (it can also be a solder-free plug-in terminal block) , one end of which is connected to the internal terminal block of the device, and the other end is connected to the 24VDC power supply of the external diesel engine controller; the current transformer output socket adopts a solder-free plug-in terminal block, one end of which is connected to the output end of the current transformer inside the device, and the other end is used to connect an oscilloscope to realize the function of detecting the driving current waveform; the 220VAC mains input socket can adopt an AC power socket with a switch, one end of which is connected to the internal current transformer DC power supply of the device, and the other end is connected to the 220VAC mains input wiring harness plug, which is used to power the current transformer DC power supply.

[0042] Figure 1 Four Φ4mm through holes are reserved on the left side plate 4 and the right side plate 5 for installing the distribution board 8 and the solenoid valve installation plate 9; handles 10 are installed on the ears of the left and right side plates for operators to use when moving and carrying the device.

[0043] Figure 6 The middle distribution board 8 is equipped with a terminal block, a current transformer and a current transformer DC power supply; Figure 7 The wiring relationship is connected to the terminal block, the switch on the detection switch panel 2, the high-speed solenoid valve and the socket on the rear panel. The common end wiring harness of the A-row solenoid valves led out from the injection solenoid valve drive input socket of the electronic control system passes through the sensing hole of the first current transformer and is connected to the terminal block, and the common end wiring harness of the B-row solenoid valves passes through the sensing hole of the second current transformer and is connected to the terminal block; one end of the current transformer output socket is connected to the output end of the current transformer inside the device through a wire; one end of the 220VAC mains input socket is connected to the current transformer DC power supply inside the device through a wire; one end of the 24VDC power input socket (2-core metal electrical connector) of the electronic control system is connected to the 29th and 30th pins of the terminal block.

[0044] Figure 3-Figure 4A high-speed solenoid valve 12 for simulating the operation of the diesel engine electronic fuel injector solenoid valve is installed on the solenoid valve mounting plate 9. A high-speed solenoid valve 12 is installed for every 4 solenoid valve mounting holes (2 each on the top and bottom). There are 12 high-speed solenoid valves 12. The solenoid valve mounting holes on the solenoid valve mounting plate 9 adopt a pressure riveted nut structure. The fixing nut is located on the lower surface of the mounting plate, and the solenoid valve suction surface is located on the upper surface of the mounting plate. The solenoid valve is installed and fixed by connecting the fixing nut with a long screw through the solenoid valve's own mounting hole. The solenoid valve mounting plate 9 is installed inside the device as shown in the following figure. Figure 3-Figure 4 shown.

[0045] Figure 5 A circular groove (2 cm in diameter, 1 mm in height) is punched on the mounting plate just below the suction surface of each high-speed solenoid valve 12, and a circular thin iron sheet 11 with a diameter of 1.8 cm and a thickness of 0.9 mm is placed in the groove. When the solenoid valve is working, the iron sheet will collide with the valve suction surface under the action of electromagnetic force to produce an obvious suction sound, which allows the operator to intuitively perceive the working status of the solenoid valve.

[0046] according to Figure 8 As shown, by connecting this simulation device with external equipment or power supply, the fuel injection drive load simulation function of the diesel engine electronic control system can be realized. One end of the controller is connected to the injector solenoid valve drive signal input socket on the rear panel of the device through the injector solenoid valve drive cable, and the other end is connected to the host computer, which is used to detect the injector solenoid valve state (open circuit, short circuit, etc.) and drive and control the high-speed solenoid valve action (such as single solenoid valve power-on work, static valve knocking test, etc.); the current transformer output end socket is connected to the oscilloscope test harness plug to detect and display the drive current waveform; the 220VAC mains harness plug is connected to the 220VAC mains socket on the device to power the current transformer DC power supply; the 24VDC DC power supply is connected to the controller and the device DC power socket respectively to provide the same power supply for the controller and the device.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable fuel injection drive load simulation device for a diesel engine electronic control system, characterized in that: The invention comprises a box frame (1), a detection switch panel (2), a rear panel (3), a left side panel (4), a right side panel (5), an upper cover (6), a lower cover (7), a power distribution board (8), a solenoid valve mounting plate (9) and a handle (10). The box frame (1) is provided with a power distribution board (8) and a solenoid valve mounting plate (9). The power distribution board (8) and the solenoid valve mounting plate (9) are arranged in parallel. The front end of the box frame (1) is provided with a detection switch panel (2). Both sides of the front end of the box frame (1) are provided with a handle (10) respectively. The rear end of the box frame (1) is provided with a rear panel (3). Both sides of the box frame (1) are provided with a left side panel (4) and a right side panel (5). Both sides of the box frame (1) are provided with an upper cover (6) and a lower cover (7) respectively. It also includes a plurality of high-speed solenoid valves (12), wherein the solenoid valve mounting plate (9) is provided with a plurality of solenoid valve mounting holes, wherein the solenoid valve mounting holes adopt a pressure riveted nut structure, and the plurality of solenoid valve mounting holes are arranged in two rows in parallel, and a high-speed solenoid valve (12) is respectively installed in each solenoid valve mounting hole; The detection switch panel (2) is provided with 12 toggle switches and 16 buttons on its surface, wherein the toggle switches are used to control the high-speed solenoid valve (12) to open its wiring, and the buttons are used to control the high-speed solenoid valve (12) to short its wiring or to short-circuit the common end of the solenoid valve and the power supply / power supply ground; The rear panel (3) comprises a panel body, an electric control system fuel injection solenoid valve drive input socket, an electric control system 24VDC power input socket, a current transformer output socket, and a 220VAC mains input socket. The panel body is installed at the rear end of the box frame (1). The electric control system fuel injection solenoid valve drive input socket is installed on one side of the panel body surface, and the 220VAC mains input socket is installed on the other side of the panel body surface. The electric control system 24VDC power input socket is installed at the lower middle end of the panel body surface, and the current transformer output socket is installed at the upper middle end of the panel body surface. The switchboard (8) comprises a switchboard body, a terminal block, a current transformer and a current transformer DC power supply, the switchboard body is installed inside the box frame (1), the two sides of the switchboard body are respectively connected to the left side board (4) and the right side board (5), and the switchboard body is installed with a terminal block, a current transformer and a current transformer DC power supply on the surface; It also includes external equipment and an external power supply, wherein the external equipment includes a controller, a host computer, an oscilloscope, and a 220VAC mains wiring harness plug, wherein one end of the controller is connected to an injector solenoid valve drive signal input socket of an electronic control system on a rear panel (3) via an injector solenoid valve drive cable, and the other end of the controller is connected to the host computer, and the current transformer output socket is connected to a test wiring harness plug of an oscilloscope for detecting and displaying a drive current waveform; The 220VAC mains harness plug is connected to the 220VAC mains input socket for supplying power to the current transformer DC power supply; the external power supply is a 24VDC DC power supply, which is respectively connected to the controller and the electronic control system 24VDC power input socket for providing the same power supply to the controller and the device.

2. A portable fuel injection drive load simulation device for a diesel engine electronic control system according to claim 1, characterized in that: The number of the high-speed solenoid valves (12) is 12.

3. A portable fuel injection drive load simulation device for a diesel engine electronic control system according to claim 1, characterized in that: It also comprises a circular thin iron sheet (11), wherein the circular thin iron sheet (11) is installed in the installation hole of the solenoid valve.

4. A portable fuel injection drive load simulation device for a diesel engine electronic control system according to claim 1, characterized in that: The upper cover plate (6) and the lower cover plate (7) have the same structure, both of which are rectangular parallelepiped structures.

5. A portable fuel injection drive load simulation device for a diesel engine electronic control system according to claim 1, characterized in that: The left side plate (4) and the right side plate (5) are both provided with four through holes of Φ4 mm for installing a power distribution board (8) and a solenoid valve installation plate (9).

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