Full-function fire pump charging angle ignition controller

Abstract

This invention provides a full-function fire pump charging angle ignition controller, comprising a housing and an internal circuit board. The circuit board integrates a control unit and an ignition module. The control unit includes a microcontroller and a trigger circuit. The trigger circuit includes a voltage-regulating and current-limiting circuit, a positive trigger signal input circuit, and a negative trigger signal input circuit. The input terminal of the voltage-regulating and current-limiting circuit receives the trigger signal, and its output terminal is connected to the input terminals of the positive and negative trigger signal input circuits. The output terminals of the positive and negative trigger signal input circuits are respectively connected to the positive and negative signal input pins of the microcontroller. The ignition module includes an ignition drive circuit, whose input terminal is connected to the microcontroller's signal output pin, and whose output terminal is connected to the ignition coil input terminal. This invention solves the problem of false triggering caused by various interferences or malfunctions during signal transmission in existing integrated ignition systems.

Description

Technical Field

[0001] This utility model relates to the field of ignition control technology for fire-fighting equipment, and in particular to a full-function fire pump charging angle ignition controller. Background Technology

[0002] A fuel-fired fire pump is a fire-fighting water supply device powered by a diesel engine. Due to its independent power, wide range of head / flow rate, and high degree of automation, it is widely used in fire-fighting water supply, high-risk equipment water supply, and emergency rescue in industrial and mining enterprises such as smelting, docks, airports, petrochemicals, power plants, liquefied gas stations, and textiles. It is a key piece of equipment for ensuring safety.

[0003] Existing fuel-fired fire pumps mainly employ two types of ignition systems: mechanical and electronic. Mechanical ignition systems control the primary current of the ignition coil via mechanical contacts, distributing it to the spark plugs of each cylinder via a distributor. Due to the ease of contact wear and low reliability, mechanical ignition systems are largely obsolete in high-end fire pumps, although some low-cost systems still use them. Electronic ignition systems, on the other hand, use an electronic control unit (ECU) to collect real-time data such as engine speed and load, calculate the ignition advance angle using a lookup table, and then control the primary circuit of the ignition coil via an ignition module after dynamic parameter correction. This achieves optimal combustion efficiency while simultaneously enabling ignition, and has become the mainstream solution. However, the functions of the electronic control unit in fire pumps are simpler than those in vehicles, with some low-end models only supporting basic controls.

[0004] When using electronic ignition systems, two main structural designs are employed: discrete and integrated. The discrete design occupies a large space, which is not conducive to the integration of miniaturized fire pumps. Furthermore, it requires additional hardware interfaces between the electronic control unit and the ignition module, increasing BOM costs and assembly complexity. On the other hand, while the integrated design can improve space utilization by integrating the control unit and the ignition module, it is susceptible to various interferences (such as electromagnetic interference) or malfunctions during actual signal transmission, leading to false triggering. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a full-function fire pump charging angle ignition controller, which solves the problem that existing integrated ignition systems are susceptible to various interferences or malfunctions during actual signal transmission, leading to false triggering.

[0006] According to an embodiment of this utility model, a full-function fire pump charging angle ignition controller includes a housing and a built-in circuit board. The circuit board integrates a control unit and an ignition module. The control unit receives and processes the flywheel convex hull trigger signal sensed by the ignition trigger, calculates the engine speed and the corresponding ignition angle delay value, and outputs control commands. The ignition module controls the on / off state of the primary circuit of the ignition coil according to the control commands. The control unit includes a microcontroller and a trigger circuit. The trigger circuit includes a voltage-regulating and current-limiting circuit, a trigger positive signal input circuit, and a trigger negative signal input circuit. The input terminal of the voltage-regulating and current-limiting circuit receives the trigger signal, and the output terminal of the voltage-regulating and current-limiting circuit is connected to the input terminals of the trigger positive signal input circuit and the trigger negative signal input circuit. The output terminals of the trigger positive signal input circuit and the trigger negative signal input circuit are respectively connected to the positive signal input pin and the negative signal input pin of the microcontroller. The ignition module includes an ignition drive circuit. The input terminal of the ignition drive circuit is connected to the signal output pin of the microcontroller, and the output terminal of the ignition drive circuit is connected to the input terminal of the ignition coil.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] The microcontroller performs dual-channel signal acquisition of the positive and negative trigger signals from the flywheel convex fossa sensed by the ignition trigger. This ensures that the microcontroller considers the trigger signal valid only when both positive and negative signals simultaneously meet specific conditions. Based on the time difference and voltage value of these two different state signals, the microcontroller dynamically adjusts the ignition angle in real time, optimizing the ignition timing and thus improving combustion efficiency. Compared with traditional single-channel signal acquisition, this solves the problem of false triggering caused by various interferences or faults in the actual signal transmission process of existing integrated ignition systems. It improves the reliability and stability of signal transmission and reduces the occurrence of false triggering.

[0009] By setting the voltage regulation and current limiting circuit before the trigger positive signal and trigger negative signal input to the microcontroller, the voltage regulation and current limiting circuit can process the input trigger positive signal and trigger negative signal, ensuring that the signal voltage provided to the subsequent circuit is stable and the current is within a safe range. This prevents excessive current from flowing into the trigger positive signal input circuit, the trigger negative signal input circuit, and the microcontroller, avoiding damage to the electronic components in the circuit due to excessive current and improving the service life of the electronic components. Attached Figure Description

[0010] Figure 1 This is a circuit diagram of a full-function fire pump charging and ignition controller according to an embodiment of the present invention.

[0011] Figure 2This is a schematic diagram of the overall structure of a full-function fire pump charging and ignition controller according to an embodiment of the present invention.

[0012] Figure 3 This is a cross-sectional view along the screw of a full-function fire pump charging and ignition controller according to an embodiment of the present invention.

[0013] Figure 4 This is a cross-sectional view along the spring of a full-function fire pump charging angle ignition controller according to an embodiment of the present invention.

[0014] Figure 5 This is a schematic diagram of the structure of a control unit of a full-function fire pump charging angle ignition controller mounted on a circuit board, according to an embodiment of the present invention.

[0015] Figure 6 This is a schematic diagram showing the connection between the lower elastic damping layer and the housing of a full-function fire pump charging angle ignition controller according to an embodiment of this utility model.

[0016] Figure 7 This is a cross-sectional view along the fixing bolt of a full-function fire pump charging angle ignition controller according to an embodiment of the present utility model.

[0017] Figure 8 This is a control principle diagram of a full-function fire pump charging angle ignition controller according to an embodiment of the present utility model.

[0018] In the above figures: 1. Housing; 2. Circuit board; 3. Cover plate; 4. Connecting bolt; 5. Fixing bolt; 6. Mounting nut; 21. Control unit; 22. Ignition module; 23. Start-stop module; 24. Power supply module; 25. Voltage regulation module; 71. Upper elastic damping vibration reduction layer; 72. Lower elastic damping vibration reduction layer; 73. Screw; 74. Limiting groove; 75. Spring. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-2 As shown in the figure, this utility model embodiment proposes a full-function fire pump charging angle ignition controller, which includes a housing 1 and a built-in circuit board 2. The circuit board 2 integrates a control unit 21 and an ignition module 22. The control unit 21 is used to receive and process the flywheel convex hull trigger signal sensed by the ignition trigger, calculate the engine speed and the corresponding ignition angle delay value, and output control commands. The ignition module 22 controls the on / off of the primary circuit of the ignition coil according to the control commands.

[0021] The control unit 21 includes a microcontroller and a trigger circuit. The trigger circuit includes a voltage regulator and current limiting circuit, a positive trigger signal input circuit, and a negative trigger signal input circuit. The input terminal of the voltage regulator and current limiting circuit receives a trigger signal, and the output terminal of the voltage regulator and current limiting circuit is connected to the input terminals of the positive trigger signal input circuit and the negative trigger signal input circuit. The output terminals of the positive trigger signal input circuit and the negative trigger signal input circuit are respectively connected to the positive signal input pin and the negative signal input pin of the microcontroller.

[0022] The ignition module 22 includes an ignition drive circuit. The input terminal of the ignition drive circuit is connected to the signal output pin of the microcontroller, and the output terminal of the ignition drive circuit is connected to the input terminal of the ignition coil.

[0023] Specifically, when the convex foci on the flywheel of the fire pump's alternator passes the trigger, the trigger senses the flywheel convex foci trigger signal and transmits the positive and negative trigger signals to the control unit 21. This allows the voltage regulation and current limiting circuit of the control unit 21 to process the input positive and negative trigger signals, ensuring that the signal voltage provided to the subsequent circuits is stable and the current is within a safe range. Subsequently, the positive and negative trigger signal input circuits respectively input the positive and negative trigger signals to the positive and negative signal input pins of the microcontroller. After receiving the positive and negative trigger signals, the microcontroller calculates the two signals to obtain the engine speed and the corresponding ignition angle delay value, and outputs a control command to the ignition module 22. Then, the ignition drive circuit of the ignition module 22 controls the on / off state of the primary circuit of the ignition coil according to the control command. After the primary circuit of the ignition coil is connected to current, the secondary circuit receives high voltage, which ignites the fuel through the engine spark plug, completing the ignition operation.

[0024] Furthermore, the voltage regulation and current limiting circuit includes a resistor R47, a Zener diode DW6, and a Zener diode DW7. One end of the resistor R47 is input with a trigger signal, and the other end of the resistor R47 is connected to the positive terminal of the Zener diode DW6. The negative terminal of the Zener diode DW6 is connected to the negative terminal of the Zener diode DW7, and the positive terminal of the Zener diode DW7 is grounded.

[0025] Specifically, after the trigger senses the flywheel convex trigger signal, the positive and negative trigger signals are transmitted to the Zener diodes DW6 and DW7 after being current-limited by resistor R47. This allows the Zener diodes DW6 and DW7 to clamp the input voltage to a fluctuation range of 4V, thereby protecting the transistors Q9 and Q10 from damage and ensuring the stability and reliability of the trigger circuit.

[0026] Furthermore, the trigger positive signal input circuit includes a resistor R46, a capacitor C16, a transistor Q10, and a capacitor C15. One end of both resistor R46 and capacitor C16 is connected to the end of resistor R47 near the Zener diode DW6, and the other end of both resistor R46 and capacitor C16 is connected to the base of transistor Q10. The collector of transistor Q10 is connected to the positive signal input pin of the microcontroller via resistor R45, and to the positive terminal of the 5V power supply via resistor R44. The emitter of transistor Q10 is grounded. One end of capacitor C15 is connected to the end of resistor R45 away from the collector of transistor Q10, and the other end of capacitor C15 is grounded.

[0027] Specifically, the positive trigger signal sensed by the trigger reaches the base of transistor Q10 via capacitor C16 (the voltage of capacitor C16 can be discharged through resistor R46 to prepare for the detection of the positive signal), turning it to ground. After transistor Q10 is turned on, the current is limited by resistor R45, and the current-limited positive trigger signal is transmitted to the positive signal input pin of the microcontroller (as shown in the attached figure). Figure 1 (As shown in the 8 pins of the microcontroller in the diagram), the positive signal input pin of the microcontroller is pulled low to generate a positive pulse detection signal. At the same time, capacitor C15 can filter out interference when the pin is pulled low.

[0028] Furthermore, the trigger negative signal input circuit includes a transistor Q9, a resistor R53, a capacitor C17, and a capacitor C18. The base of transistor Q9 is connected to the emitter of transistor Q10; the collector of transistor Q9 is connected to the negative signal input pin of the microcontroller via resistor R42, and to the positive terminal of the 5V power supply via resistor R43; the emitter of transistor Q9 is connected to one end of resistor R53 and capacitor C17, and the other end of resistor R53 and capacitor C17 is connected to one end of capacitor C18; the other end of capacitor C18 is grounded, and the end of capacitor C18 closest to resistor R53 is connected to the positive terminal of Zener diode DW6.

[0029] Specifically, the trigger negative signal sensed by the trigger is grounded to the base and emitter of transistor Q9. The emitter of transistor Q9 is grounded through capacitors C17 and C18, which turns on transistor Q9. After transistor Q9 is turned on, the current is limited by resistor R42. The current-limited trigger negative signal is then transmitted to the negative signal input pin of the microcontroller (as shown in the attached figure). Figure 1 (As shown in pin 7 of the microcontroller), the negative signal input pin of the microcontroller is pulled low to generate a negative pulse detection signal. At the same time, capacitor C14 can filter out interference when the pin is pulled low.

[0030] Furthermore, the ignition drive circuit includes transistors Q11, Q13, and Q14. The base of transistor Q14 is connected to the signal output pin of the microcontroller via resistor R52, the emitter of transistor Q14 is grounded, and the collector of transistor Q14 is connected to the base of transistor Q13 via resistor R51. The collector of transistor Q13 is connected to the positive terminal of the 12V power supply, and the emitter of transistor Q13 is connected to the base of transistor Q11 via resistor R48. Resistors R49 and R48 are connected in parallel. One end of resistor R50 is connected to the base of transistor Q13, and the other end of resistor R50 is connected to the collector of transistor Q13. The collector of transistor Q11 is connected to the input terminal of the ignition coil, the emitter of transistor Q11 is grounded, and the output terminal of the ignition coil is connected to the positive terminal of the 12V power supply.

[0031] Specifically, after the microcontroller obtains the engine speed and the corresponding ignition angle delay value, it generates a control command (i.e., an ignition signal) based on this speed and ignition angle delay value, and outputs it from the microcontroller's signal output pin (as shown in the attached image). Figure 1 The microcontroller (pin 1) outputs the control command to the ignition drive circuit of the ignition module 22. The command is then inverted by transistor Q14 via resistor R52, amplified by transistor Q13, and driven to conduct by transistor Q11 via resistors R48 and R49. This turns on the primary circuit of the ignition coil. When current flows through the primary circuit of the ignition coil, the secondary circuit of the ignition coil receives high voltage, which ignites the fuel through the engine spark plug, thus achieving the ignition operation.

[0032] Furthermore, the ignition drive circuit also includes an overvoltage protection circuit consisting of a resistor R40, a Zener diode DW5, and a transistor Q12. The collector of transistor Q12 is connected to the end of resistor R49 near the base of transistor Q11. The emitter of transistor Q12 is grounded. The base of transistor Q12 is connected to the anode of Zener diode DW5. The cathode of Zener diode DW5 is connected to the positive terminal of the 12V power supply through resistor R40.

[0033] Specifically, resistor R40, Zener diode DW5, and transistor Q12 together form an overvoltage protection circuit to prevent the ignition coil and transistor from burning out due to excessive power supply voltage.

[0034] Furthermore, the circuit board 2 also integrates a start / stop module 23, a power supply module 24, and a voltage regulation module 25, wherein:

[0035] The start / stop module 23 includes a first shutdown circuit. An external shutdown signal is input to the input terminal of the first shutdown circuit, and the output terminal of the first shutdown circuit is connected to the shutdown signal input pin of the microcontroller to input a shutdown signal to the microcontroller.

[0036] The power supply module 24 includes a voltage regulator circuit. The input terminal of the voltage regulator circuit receives a 12V positive power supply, and the output terminal of the voltage regulator circuit is connected to the power input pin of the microcontroller (as shown in the attached diagram). Figure 1 (As shown in pin 2 of the microcontroller), and the power input pin of the microcontroller is also connected to the positive terminal of a 5V power supply to provide the power required by the microcontroller;

[0037] The voltage regulating module 25 receives the AC output signal from the generator at its input terminal and connects its output terminal to the input terminal of the voltage stabilizing circuit to ensure that the voltage of the power supply module 24 is stable when the power supply module 24 supplies power.

[0038] Specifically, the start-stop module 23 can perform both shutdown and start-up operations. The power supply module 24 is connected to the power input pin of the microcontroller, providing the power required by the microcontroller in the control unit 21. When the power supply module 24 provides the required power to the microcontroller, the voltage regulation module 25 adjusts the voltage of the power supply module 24. A voltage regulator circuit is set between the voltage regulation module 25 and the power supply module 24 to ensure the voltage of the power supply module 24 is stable. Meanwhile, the start-stop module 23, the power supply module 24, and the voltage regulation module 25 integrated on the circuit board 2 are suspended and soldered 0.5-0.8mm above the circuit board 2 using a suspended soldering structure. The pin ends of the start-stop module 23, the power supply module 24, and the voltage regulation module 25 are still electrically connected to the circuit board 2, thereby improving the vibration reduction effect of the start-stop module 23, the power supply module 24, and the voltage regulation module 25.

[0039] Preferably, the start / stop module 23 includes a first shutdown circuit, a second shutdown circuit, and a start circuit, wherein:

[0040] The first shutdown circuit includes a resistor R1 and a transistor Q1. One end of the resistor R1 receives the magnetic induction shutdown signal, and the other end of the resistor R1 is connected to the base of the transistor Q1. The collector of the transistor Q1 is connected to the shutdown signal input pin of the microcontroller, and the emitter of the transistor Q1 is grounded. One end of the resistor R4 is connected to the collector of the transistor Q1, and the other end of the resistor R4 is connected to the positive terminal of the 5V power supply. One end of the resistor R2 is connected to the base of the transistor Q1, and the other end of the resistor R2 is connected to the emitter of the transistor Q1. One end of the capacitor C1 is connected to the base of the transistor Q1, and the other end of the capacitor C1 is grounded. One end of the resistor R3 receives the generator AC output signal, and the other end of the resistor R3 is connected to the anode of the diode D1. The cathode of the diode D1 is connected to the end of the resistor R1 furthest from the transistor Q1.

[0041] Specifically, when the flameout is required, the magnetic induction switch outputs a low level, which short-circuits the base of transistor Q1 through resistor R1, causing transistor Q1 to turn off. The 5V voltage, after being current-limited by resistor R4, then powers the flameout signal input pin of the microcontroller (as shown in the attached diagram). Figure 1 Pin 3 of the microcontroller is at a high level, thus achieving the purpose of extinguishing the engine. When the engine is rotating, the voltage generated by the charging coil is current-limited by resistor R3 and rectified at diode D1. The rectified DC power will charge capacitor C1 through resistor R1. If the magnetic induction switch output is not low, transistor Q1 is kept conducting by capacitor C1, so that the extinguishing signal input pin of microcontroller U5 is still low. At this time, the igniter has a trigger signal and executes the engine ignition.

[0042] The second fire shut-off circuit includes a fire shut-off switch S1. One end of the fire shut-off switch S1 is connected to the end of resistor R47 away from resistor R46, and the other end of the fire shut-off switch S1 is grounded.

[0043] Specifically, in addition to using the magnetic induction switch to output a low level to extinguish the flame, the flame can also be extinguished by operating the flameout switch S1 to directly short-circuit the trigger circuit, thereby short-circuiting the trigger signal to ground.

[0044] The starting circuit includes a relay K1. One side of the coil of relay K1 is connected to the positive terminal of a 12V power supply, and the other side receives a start signal for button start or magnetic induction start. The two sides of the normally open contact of relay K1 are respectively connected to the positive terminal of a 12V power supply and the starter motor.

[0045] Specifically, when a start signal is input to the start / stop module 23 via button start or magnetic induction start, and the voltage and current of the start signal reach the operating threshold of relay K1, the coil of relay K1 is energized, causing the normally open contact (as shown in the attached diagram) to open. Figure 1 When pins 3 and 4 of relay K1 are closed, the power supply to the starter motor is turned on, and the starter motor starts running, completing the start-up action. When the starter motor is activated by a button or magnetic induction, a shutdown signal is input to the start-stop module 23, and the normally open contact of relay K1 opens, causing the starter motor to stop running. At the same time, the start-stop module 23 transmits the shutdown signal to the microcontroller, generates a corresponding shutdown control command, and transmits the shutdown control command to the ignition module 22 through the microcontroller. The ignition module 22 then controls the primary circuit of the ignition coil to disconnect according to the shutdown control command, completing the shutdown operation.

[0046] The detailed working process of this embodiment is as follows:

[0047] When the fire pump needs to be operated, the flywheel of the fire pump's alternator is turned. When the convex foci on the flywheel pass through the trigger, the trigger senses the flywheel convex foci trigger signal. At this time, the trigger positive signal sensed by the trigger passes through resistor R47 and capacitor C16 to the PN junction of transistor Q10, turning it on, and then through resistor R45 pulls low the first input pin of the microcontroller. The trigger negative signal sensed by the trigger passes through transistor Q9 and capacitor C17, turning on transistor Q9, and then through resistor R42 pulls low the second input pin of the microcontroller. After the microcontroller receives these two signals (the trigger positive signal and the trigger negative signal), it calculates the engine speed and the corresponding ignition angle delay value. After obtaining the engine speed and the corresponding ignition angle delay value, the microcontroller will... The rotational speed and ignition angle delay value generate a control command, which is output from the microcontroller's output pin to the ignition drive circuit of the ignition module 22. The command is then inverted by transistor Q14 via resistor R52, amplified by transistor Q13, and driven to conduct by transistor Q11 via resistors R48 and R49. This conducts the primary circuit of the ignition coil. When current flows through the primary circuit of the ignition coil, the secondary circuit receives high voltage, which ignites the fuel through the engine spark plug, thus achieving ignition. Simultaneously, a start signal is input to the start-stop module 23 via button start or magnetic induction start. When the voltage and current of the start signal reach the action threshold of relay K1, the coil of relay K1 is energized, causing the normally open contact to close, connecting the power supply to the starter motor, and the starter motor begins to run, completing the starter motor's starting action.

[0048] When it is necessary to stop the fire pump, a fire extinguishing signal is input to the start / stop module 23 via button start or magnetic induction start. The start / stop module 23 controls the starter motor to stop running through the fire extinguishing signal, thus completing the stopping action of the starter motor. At the same time, the start / stop module 23 transmits the fire extinguishing signal to the microcontroller to generate a corresponding fire extinguishing control command, and then transmits the fire extinguishing control command to the ignition module 22 through the microcontroller. This causes the ignition module 22 to control the primary circuit of the ignition coil to disconnect according to the fire extinguishing control command, thus completing the fire extinguishing operation.

[0049] like Figures 3-8 As shown, according to another embodiment of the present invention, the control unit 21 and the ignition module 22 adopt a suspended welding structure, so that the control unit 21 and the ignition module 22 are suspended and welded above the circuit board 2, while the pin ends of the control unit 21 and the ignition module 22 are still electrically connected to the circuit board 2.

[0050] Specifically, by suspending and soldering the control unit 21 and the ignition module 22 0.5-0.8mm above the circuit board 2, a certain gap is created between the control unit 21 and the ignition module 22 and the circuit board 2. This not only reduces the direct transmission of external vibrations or impacts to the control unit 21 and the ignition module 22, but also increases the heat dissipation space between the control unit 21 and the ignition module 22 and the circuit board 2, preventing localized overheating. The method of suspending and soldering the control unit 21 and the ignition module 22 above the circuit board 2 includes, but is not limited to, using L-shaped soldering wires (as shown in the attached diagram). Figure 2 and attached Figure 4 As shown, the L-shaped welding line can provide a small deformation space to disperse high-frequency vibration energy and improve the vibration reduction effect. At the same time, the L-shaped welding line can reduce the direct pulling of thermal expansion on the weld joint and extend the service life of the control unit 21 and the ignition module 22.

[0051] Furthermore, a buffer mechanism is provided between the circuit board 2 and the housing 1. The buffer mechanism adopts a multi-layer composite vibration reduction structure, with the upper and lower layers being elastic damping vibration reduction layers and the middle layer being a spring buffer layer. The lower elastic damping vibration reduction layer 72 is detachably installed at the bottom of the housing 1, and the upper elastic damping vibration reduction layer 71 is detachably installed under the circuit board 2.

[0052] Specifically, the lower elastic damping layer 72 is detachably installed inside the housing 1 by fixing bolts 5. The upper elastic damping layer 71 has screws 73. The circuit board 2 has mounting holes. The number of mounting holes on the circuit board 2 is the same as the number of screws 73, and their positions correspond one-to-one, so that the screws 73 can pass through the mounting holes of the circuit board 2. Then, the circuit board 2 is detached and installed on the upper elastic damping layer 71 by mounting nuts 6. This allows both the circuit board 2 and the buffer mechanism to be removed from the housing 1 for maintenance or replacement. At the same time, the buffer mechanism adopts a multi-layer composite damping structure, which enables the buffer mechanism to dampen the circuit board 2 when the housing 1 is subjected to vibration or impact, further reducing the impact of external vibration or impact on the control unit 21 and the ignition module 22.

[0053] Furthermore, the spring buffer layer includes a plurality of springs 751, with both ends of each spring 751 embedded in the corresponding limiting grooves 74 of the lower elastic damping layer 72 and the upper elastic damping layer 71. Specifically, by providing a plurality of springs 751 in the middle layer of the buffer mechanism, and with both ends of each spring 751 embedded in the corresponding limiting grooves 74 of the lower elastic damping layer 72 and the upper elastic damping layer 71, the position of the springs 751 will not shift while damping vibration.

[0054] Furthermore, the power ground of the circuit board 2 is located on the bottom layer of the circuit board 2; the housing 1 is a metal alloy housing 1 with high thermal conductivity. Specifically, since each module and unit integrated on the circuit board 2 needs to be grounded, a large amount of heat will accumulate at the grounding point. By setting a grounding layer on the bottom layer of the circuit board 2, the grounding area can be increased and the heat dissipation effect can be improved. By making the housing 1 a metal alloy housing 1 with high thermal conductivity, the heat on the circuit board 2 can be dissipated from the metal alloy housing 1, further improving the heat dissipation effect.

[0055] Furthermore, it also includes a cover plate 3, which is detachably mounted on the housing 1 to close or open the interior of the housing 1. Specifically, the cover plate 3 is detachably mounted on the housing 1 via connecting bolts 4, so that the cover plate 3 can open or close the internal space of the housing 1, thereby shielding and protecting the circuit board 2 inside the housing 1. Both the housing 1 and the cover plate 3 can be made of metal, so that the cover plate 3 and the housing 1 can jointly provide electromagnetic shielding for the circuit board 2, so as to avoid external electromagnetic interference from affecting the normal operation of the modules and units on the circuit board 2 inside the housing 1.

[0056] The detailed working process of this embodiment is as follows:

[0057] When the housing 1 of the ignition controller is subjected to vibration or impact, the buffer mechanism provided between the housing 1 and the circuit board 2 can dampen the vibration or impact transmitted from the housing 1 to the circuit board 2. Simultaneously, the control unit 21, the ignition module 22, the start-stop module 23, the power supply module 24, and the voltage regulation module 25 are all suspended above the circuit board 2 using a suspended welding structure, creating a certain gap between the control unit 21 and the ignition module 22 and the circuit board 2. This further dampens the vibration of each module and unit on the circuit board 2, preventing external vibration or impact from interfering with the normal operation of the control unit 21, the ignition module 22, the start-stop module 23, the power supply module 24, and the voltage regulation module 25.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A full-function fire pump charging angle ignition controller, comprising a housing and a built-in circuit board, wherein a control unit and an ignition module are integrated on the circuit board, the control unit is used to receive and process the flywheel convex trigger signal sensed by the ignition trigger, calculate the engine speed and the corresponding ignition angle delay value, and output control commands, and the ignition module controls the on / off state of the primary circuit of the ignition coil according to the control commands, characterized in that: The control unit includes a microcontroller and a trigger circuit. The trigger circuit includes a voltage regulator and current limiter circuit, a positive trigger signal input circuit, and a negative trigger signal input circuit. The input terminal of the voltage regulator and current limiter circuit receives the trigger signal, and the output terminal of the voltage regulator and current limiter circuit is connected to the input terminals of the positive trigger signal input circuit and the negative trigger signal input circuit. The output terminals of the positive trigger signal input circuit and the negative trigger signal input circuit are respectively connected to the positive signal input pin and the negative signal input pin of the microcontroller. The ignition module includes an ignition drive circuit. The input terminal of the ignition drive circuit is connected to the signal output pin of the microcontroller, and the output terminal of the ignition drive circuit is connected to the input terminal of the ignition coil.

2. A full function fire pump charge admission point firing controller as defined in claim 1 wherein: The voltage regulation and current limiting circuit includes a resistor R47, a Zener diode DW6, and a Zener diode DW7. One end of the resistor R47 is input with a trigger signal, and the other end of the resistor R47 is connected to the positive terminal of the Zener diode DW6. The negative terminal of the Zener diode DW6 is connected to the negative terminal of the Zener diode DW7, and the positive terminal of the Zener diode DW7 is grounded.

3. A full function fire pump charge admission point firing controller as defined in claim 2 wherein: The trigger positive signal input circuit includes a resistor R46, a capacitor C16, a transistor Q10, and a capacitor C15. One end of both resistor R46 and capacitor C16 is connected to the end of resistor R47 near the Zener diode DW6, and the other end of both resistor R46 and capacitor C16 is connected to the base of transistor Q10. The collector of transistor Q10 is connected to the positive signal input pin of the microcontroller via resistor R45, and to the positive terminal of the 5V power supply via resistor R44. The emitter of transistor Q10 is grounded. One end of capacitor C15 is connected to the end of resistor R45 away from the collector of transistor Q10, and the other end of capacitor C15 is grounded.

4. A full function fire pump charge admission point firing controller as defined in claim 3 wherein: The trigger negative signal input circuit includes transistor Q9, resistor R53, capacitor C17, and capacitor C18. The base of transistor Q9 is connected to the emitter of transistor Q10. The collector of transistor Q9 is connected to the negative signal input pin of the microcontroller via resistor R42, and to the positive terminal of the 5V power supply via resistor R43. The emitter of transistor Q9 is connected to one end of resistor R53 and capacitor C17, and the other end of resistor R53 and capacitor C17 is connected to one end of capacitor C18. The other end of capacitor C18 is grounded, and the end of capacitor C18 closest to resistor R53 is connected to the positive terminal of Zener diode DW6.

5. A full-function fire pump charging and ignition controller as described in claim 1, characterized in that: The ignition drive circuit includes transistors Q11, Q13, and Q14. The base of transistor Q14 is connected to the signal output pin of the microcontroller via resistor R52, and the emitter of transistor Q14 is grounded. The collector of transistor Q14 is connected to the base of transistor Q13 via resistor R51. The collector of transistor Q13 is connected to the positive terminal of the 12V power supply, and the emitter of transistor Q13 is connected to the base of transistor Q11 via resistor R48. Resistors R49 and R48 are connected in parallel. One end of resistor R50 is connected to the base of transistor Q13, and the other end of resistor R50 is connected to the collector of transistor Q13. The collector of transistor Q11 is connected to the input terminal of the ignition coil, the emitter of transistor Q11 is grounded, and the output terminal of the ignition coil is connected to the positive terminal of the 12V power supply.

6. A full-function fire pump charging angle ignition controller as described in claim 1, characterized in that: The circuit board also integrates a start / stop module, a power supply module, and a voltage regulation module, wherein: The start / stop module includes a first shutdown circuit. An external shutdown signal is input to the input terminal of the first shutdown circuit, and the output terminal of the first shutdown circuit is connected to the shutdown signal input pin of the microcontroller to input a shutdown signal to the microcontroller. The power supply module includes a voltage regulator circuit. The input terminal of the voltage regulator circuit receives a 12V positive power supply, and the output terminal of the voltage regulator circuit is connected to the power input pin of the microcontroller. The power input pin of the microcontroller is also connected to a 5V positive power supply to provide the power required by the microcontroller. The voltage regulating module receives the AC output signal from the generator at its input terminal and connects its output terminal to the input terminal of the voltage stabilizing circuit to ensure the voltage of the power supply module is stable when the power supply module supplies power.

7. A full-featured fire pump charge admission point firing controller as defined in claim 1, wherein: The control unit and the ignition module adopt a suspended welding structure, which allows the control unit and the ignition module to be suspended above the circuit board, while the pin ends of the control unit and the ignition module are still electrically connected to the circuit board.

8. A full function fire pump charge admission point firing controller as defined in claim 1 wherein: A buffer mechanism is provided between the circuit board and the housing. The buffer mechanism adopts a multi-layer composite vibration reduction structure, with the upper and lower layers being elastic damping vibration reduction layers and the middle layer being a spring buffer layer. The lower elastic damping layer is detachably installed at the bottom of the housing, and the upper elastic damping layer is detachably installed under the circuit board.

9. A full-featured fire pump charge admission point firing controller as defined in claim 8, wherein: The spring buffer layer contains several springs, and both ends of each spring are embedded in the corresponding limiting grooves of the lower elastic damping layer and the upper elastic damping layer.

10. A full-featured fire pump charge admission point firing controller as defined in claim 1, wherein: The power ground of the circuit board is located on the bottom layer of the circuit board; the housing is a metal alloy housing with high thermal conductivity.

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