Generator output alarm device of engine

Abstract

The utility model relates to the field of diesel engines, in particular to a generator output alarm device of an engine, which comprises a current transformer used for collecting output current of the engine and a control unit electrically connected with the current transformer, and the control unit processes electric signals output by the current transformer and controls operation of an alarm indicator and a pulse generator. The alarm indicator is used for indicating whether the output current of the generator exceeds a rated value, and the pulse generator is used for outputting a pulse square wave signal to an engine electronic control unit or other vehicle electronic control units. The utility model is beneficial for solving the problem that the output current state of the generator cannot be transmitted to an engine or a vehicle electronic control unit, adapts to generators with different rated outputs through a multi-gear design, and can send out excess working condition duration, thereby helping users or maintenance personnel to know the use condition of the generator in time and formulate coping strategies.

Description

Technical Field

[0001] This utility model relates to the field of diesel engines, and in particular to an alarm device for generator output of an engine. Background Technology

[0002] In existing technologies, engine control units (ECUs) or other vehicle ECUs typically only monitor the generator output voltage, i.e., the system voltage after the engine starts, and generally do not directly monitor the generator output current. If monitoring of the generator output current is necessary, current methods often employ clamp-on ammeters or current acquisition devices. These devices are usually measured when the vehicle is idling, at which point the generator output generally does not exceed its rated output. However, under dynamic vehicle conditions, these devices present challenges in terms of fixation and observation, and cannot interact with the engine or vehicle ECU. When the generator output current exceeds its rated operating range, these devices cannot transmit the generator output status to the ECU. Furthermore, when the vehicle's electrical load exceeds the engine generator's rated output, although the generator can continue to operate with a current exceeding its rated output by a certain amount, prolonged operation will adversely affect the quality and lifespan of its components. Utility Model Content

[0003] The purpose of this invention is to provide an alarm device for generator output of an engine. This alarm device collects the generator output current through a current transformer and outputs a signal to the device control unit. The device control unit then controls and converts the output overcurrent status and operating duration signal and issues an alarm, thus solving the problem of monitoring and alarming the generator output overcurrent status.

[0004] To achieve the above objectives, the present invention provides a generator output alarm device for an engine, comprising a current transformer for collecting the engine output current and a control unit electrically connected to the current transformer. The control unit processes the electrical signal output by the current transformer and controls the operation of an alarm indicator and a pulse generator. The alarm indicator is used to indicate whether the generator output current exceeds the rated value, and the pulse generator is used to output a pulse square wave signal to the engine electronic control unit or other vehicle electronic control units.

[0005] Preferably, the control unit includes a power supply module one for powering the current transformer, a power supply module two for driving the alarm indicator and powering the pulse generator, a configuration switch for selecting a suitable gear to adapt to different rated output generators, a relay for controlling the working state of the alarm indicator and the pulse generator, and a switching circuit for controlling the on / off state of the relay.

[0006] Preferably, when the generator output current exceeds the rated current, the current transformer output signal increases, and the signal amplified by the amplifier circuit controls the switching circuit to conduct, causing the relay to engage. The power module two then drives the alarm indicator to sound an alarm and supplies power to the pulse generator. The pulse generator outputs a pulse square wave signal to the engine control unit or other vehicle control units.

[0007] Preferably, both power module one and power module two are linear regulators, and power module one and power module two are used to convert VCC voltage to 12V and 5V respectively.

[0008] Preferably, the switching circuit is a four-channel transistor control circuit; the configuration switch is a four-position toggle switch, corresponding to the rated output parameters of four commonly used generators: 50A, 70A, 100A, and 120A.

[0009] Preferably, the pulse generator is an NE555 timer, which, depending on the external circuit connection, can operate in an unstable state to generate a square wave signal output by a multivibrator; the alarm indicator is an alarm indicator light.

[0010] Preferably, a connecting harness one is connected between the current transformer and the control unit, and the control unit is further connected to the engine electronic control unit or other vehicle electronic control units via a connecting harness two.

[0011] Preferably, the control unit further includes an amplifier circuit for amplifying the electrical signal output by the current transformer to the required state of the next-level circuit.

[0012] Preferably, the engine control unit or vehicle control unit can calculate the over-rated output duration using the following logic:

[0013] t=0.693×(R 13 +2R 14 )×C6×α

[0014] Wherein, R13 / R14 are the timer charging current limiting resistors; C6 is the timer charging and discharging capacitor; α is the number of square wave cycles, which is triggered after the first rising edge of the input is captured by a general controller.

[0015] In summary, this utility model has the following beneficial technical effects:

[0016] This invention effectively solves the problem that the generator output current status cannot be transmitted to the engine or vehicle electronic control unit. When an alarm is triggered, the device outputs an electrical signal to the engine electronic control unit. After receiving this signal, the electronic control unit can record the alarm status and the duration of over-rated output, or send this status to other units in the vehicle (such as instruments), thereby helping users or design and maintenance personnel to understand the generator's usage status in a timely manner and formulate subsequent response strategies and solutions.

[0017] This utility model device has the advantage of a multi-position design, which can be adjusted via a multi-position switch to suit generators with different rated outputs. This means that for generators with different output current specifications, only the corresponding position needs to be adjusted, without replacing the control unit, greatly improving the applicability and flexibility of the device.

[0018] This invention enables the external transmission of the duration of operation exceeding rated limits. A pulse generator sends square waves in the form of periodic pulses to the engine control unit (ECU) or vehicle control unit (VCU). The VCU calculates the duration of the operation exceeding rated limits based on these signals, thus helping generator engineers assess the impact on the hardware and providing crucial information for subsequent maintenance and optimization. Attached Figure Description

[0019] Figure 1 This is a system diagram of the generator output alarm device for the engine of this utility model;

[0020] Figure 2 This is an assembly diagram of the generator output alarm device for the engine of this utility model;

[0021] Figure 3 This is a schematic diagram of the control unit of the generator output alarm device for the engine of this utility model.

[0022] Reference numerals in the attached diagram: 1. Current transformer; 2. Control unit; 21. Power module one; 22. Power module two; 23. Configuration switch; 24. Switching circuit; 25. Relay; 26. Timer; 27. Alarm indicator light; 3. Connecting harness one; 4. Connecting harness two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model discloses a generator output alarm device for an engine, including a current transformer 1, a control unit 2, a first connecting harness 3, and a second connecting harness 4. The control unit 2 includes a first power module 21, a second power module 22, a configuration switch 23, a switching circuit 24, a relay 25, a timer 26, and an alarm indicator light 27.

[0025] Power module 21 obtains VCC power (typically 24V) through connecting harness 4. After conversion, it powers current transformer 1 through connecting harness 3. The primary side of current transformer 1 collects the charging output current of the external generator B+. After conversion on the secondary side, it outputs an electrical signal to the amplification circuit within control unit 2. The amplification circuit amplifies the input signal to the required state for the next-level circuit and outputs it to configuration switch 23. Configuration switch 23 is a multi-position toggle switch, corresponding to four commonly used generator rated output parameters: 50A, 70A, 100A, and 120A. By selecting the appropriate position, the signal is output to the next-level switching circuit 24 at the given position, controlling the on / off state of switching circuit 24.

[0026] When the generator output current exceeds the rated current, the signal output by current transformer 1 increases. This amplified signal controls the switching circuit 24 to conduct, causing relay 25 to engage. Once relay 25 engages, power module 22 drives alarm indicator 27 to illuminate, simultaneously powering timer 26. After being powered, timer 26 operates in an unstable state based on the external circuit connection status, forming a multivibrator. It outputs a pulse square wave signal, which is transmitted to the engine control unit or other vehicle control units via wiring harness 4, helping to record the generator's over-rated output status and duration.

[0027] The engine control unit or vehicle control unit can calculate the over-rated output duration using the following logic:

[0028] t=0.693×(R 13 +2R 14 )×C6×α

[0029] Among them, R13 / R14 are the current-limiting resistors for charging Timer 26; C6 is the charging and discharging capacitor for Timer 26; α is the number of square wave cycles, which is triggered to count after capturing the first rising edge of the input for a general controller.

[0030] Power module 1 (21) is a linear regulator used to convert VCC voltage to 12V to power current transformer 1. Power module 2 (22) is a linear regulator used to convert VCC voltage to 5V to drive alarm indicator 27 and power timer 26. Switching circuit 24 is a four-channel transistor control circuit, and timer 26 is an NE555 timer. Depending on the external circuit connections, it can operate in an unstable state, forming a multivibrator output square wave signal.

[0031] The configuration switch 23, through preset settings, selects an appropriate gear based on the generator's rated output parameters to accommodate generators with different rated outputs. The switching circuit 24, based on the selection by the configuration switch 23, controls the engagement and disengagement of the relay 25, thereby illuminating the alarm indicator 27 and powering the timer 26. The alarm indicator 27 indicates that the generator output current exceeds the rated value, and the pulse square wave signal output by the timer 26 records the duration of the over-rated output.

[0032] The alarm device collects the generator output current through the current transformer 1, processes it through the amplification circuit and configuration switch 23, and controls the engagement and disengagement of the relay 25 to achieve the monitoring and alarm functions of the generator output current. At the same time, the pulse square wave signal output by the timer 26 transmits the over-rated output status and duration to the engine electronic control unit or other vehicle electronic control units, helping users or maintenance personnel to understand the generator's operating status in a timely manner and formulate corresponding response strategies.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An engine generator output alarm device, characterized by, The application relates to a control unit (2) for collecting engine output current through a current transformer (1) and electrically connecting the current transformer (1), wherein the control unit (2) processes the electric signal output by the current transformer (1) and controls the working state of an alarm indicator and a pulse generator, the alarm indicator is used for indicating whether the generator output current exceeds the rated value, and the pulse generator is used for outputting a pulse square wave signal to an engine electronic control unit or other vehicle electronic control units; the control unit (2) is provided with a power module one (21) for supplying power to the current transformer (1), a power module two (22) for driving the alarm indicator and supplying power to the pulse generator, a configuration switch for selecting a suitable gear to adapt to different rated output generators, a relay (25) for controlling the working state of the alarm indicator and the pulse generator, and a switch circuit (24) for controlling the on-off state of the relay (25).

2. The engine generator output alarm device according to claim 1, characterized by, When the generator output current exceeds the rated current, the signal output by the current transformer (1) is increased, the signal amplified through an amplification circuit controls the switch circuit (24) to be turned on, the relay (25) is attracted, the alarm indicator is driven by the power module two (22) to alarm and the pulse generator is supplied with power, and the pulse generator outputs a pulse square wave signal to the engine electronic control unit or other vehicle electronic control units.

3. The engine generator output alarm device according to claim 1 or 2, characterized by, The power module one (21) and the power module two (22) are both linear voltage stabilizers, and the power module one (21) and the power module two (22) are respectively used for converting VCC voltage into 12V and 5V.

4. The engine generator output alarm device according to claim 1 or 2, characterized by, The switch circuit (24) is a four-way triode control circuit; the configuration switch (23) is a four-gear dial switch, and corresponds to four commonly used generator rated output parameter specifications of 50A, 70A, 100A and 120A.

5. The engine generator output alarm device according to claim 1 or 2, characterized by, The pulse generator is an NE555 timer (26), which can work in a non-stable state and form a multivibrator output square wave signal according to the peripheral circuit connection; and the alarm indicator is an alarm indicator lamp (27).

6. The engine generator output alarm device according to claim 1 or 2, characterized by, The current transformer (1) and the control unit (2) are connected through a connection wire harness one (3), and the control unit (2) is connected with the engine electronic control unit or other vehicle electronic control units through a connection wire harness two (4).

7. The engine generator output alarm device according to claim 1 or 2, characterized by, The control unit (2) further comprises an amplification circuit for amplifying the electric signal output by the current transformer (1) to the required state of the lower circuit.

8. The engine generator output alarm apparatus according to claim 5, wherein The engine electronic control unit or the vehicle electronic control unit can calculate the overrated output duration through the following logic: Wherein, R13 / R14 is the charging current limiting resistor of the timer (26); C6 is the charging and discharging capacitor of the timer (26); and alpha is the number of square wave cycles, which is triggered to count after the first input rising edge is captured by a general controller.

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