Valve controller for starting an internal combustion engine and control method

Abstract

The application belongs to the technical field of internal combustion engine, and particularly relates to a valve controller for starting an internal combustion engine and a control method, the valve controller comprising a microprocessor and a switching value acquisition module, a rotating speed signal acquisition module and a current signal output module which are electrically connected to the microprocessor respectively; the switching value acquisition module is used for acquiring the switching value signal of an electromagnetic valve on an intake pipeline of the internal combustion engine; the rotating speed signal acquisition module is used for acquiring the rotating speed signal of the internal combustion engine; the microprocessor is used for analyzing and processing the acquired data, and then outputting the current signal to an electric single-seat regulating valve on the intake pipeline of the internal combustion engine through the current signal output module, so as to adjust the valve opening degree of the electric single-seat regulating valve. The application controls the opening time and opening degree of the electric single-seat regulating valve through the valve controller, so as to control the gas intake amount, and finally improves the starting success rate of the internal combustion engine unit.

Description

An engine starting valve controller and control method Technical Field

[0001] The invention belongs to the technical field of internal combustion engines, and particularly relates to an engine starting valve controller and control method. Background Art

[0002] The statements in this part only provide background technical information related to the present invention, and do not necessarily constitute prior art.

[0003] In recent years, internal combustion engine gas generator sets have been widely used, mainly for: serving as an emergency backup power source when the main power supply is cut off, or as an unmanned automated gas power station with black start function. The generator sets for these purposes require a high starting success rate and a fast starting speed. However, since there are only a gas solenoid valve and a pressure regulating valve on the gas pipeline supporting the unit, when the unit starts, the solenoid valve opens, and the gas intake volume is large and the concentration is too high, often resulting in the phenomenon that the ignition fails, which leads to a low starting success rate and starting failure, affecting the on-site use.

[0004] (1) The valve arrangement on the intake pipeline of the existing internal combustion engine is shown in Figure 1. The gas intake pipeline of the existing internal combustion engine generator set includes a manual cut-off valve, a gas solenoid valve, a pressure regulating valve, etc., and an electric single-seat regulating valve and its controller are not designed; when the unit starts, the gas intake time and flow rate cannot be controlled, resulting in a large gas intake volume and high concentration, making it difficult to ignite and reducing the starting success rate.

[0005] (2) The starting process of the existing unit is shown in Figure 2. Since the automated unit is in a running or hot standby state for a long time, the manual cut-off valve is always in the open position. When the unit receives a starting command, the solenoid valve of the unit automatically gets powered on and opens, the starting relay of the internal combustion engine starting system gets powered on, and the motor starts to drive the flywheel to work. When the rotational speed reaches a certain value, the unit starts successfully. However, since the solenoid valve is fully opened, in the initial stage of starting, the gas intake volume cannot be controlled. If the gas intake volume is large and the concentration is high, the starting success rate will be low. Summary of the Invention

[0006] To overcome the deficiencies of the above-mentioned prior art, the present invention provides an engine starting valve controller and control method.

[0007] To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

[0008] The first aspect of the present invention provides an engine starting valve controller, including a microprocessor, and a switch quantity acquisition module, a rotational speed signal acquisition module, and a current signal output module that are electrically connected to the microprocessor respectively;

[0009] The switch signal acquisition module is used to acquire the switch signal of the solenoid valve on the intake manifold of the internal combustion engine, and the speed signal acquisition module is used to acquire the speed signal of the internal combustion engine.

[0010] The microprocessor analyzes and processes the collected data, and then outputs a current signal to the electric single-seat regulating valve on the intake pipe of the internal combustion engine through the current signal output module to adjust the valve opening of the electric single-seat regulating valve.

[0011] A second aspect of the present invention provides a starting control method for an internal combustion engine, based on a valve controller according to the first aspect of the present invention, the method comprising:

[0012] Acquire the speed signal of the internal combustion engine;

[0013] Acquire the switching signals of the solenoid valve on the intake manifold of the internal combustion engine;

[0014] The collected speed signal or switching signal is analyzed and processed, and a current signal is output to the electric single-seat regulating valve on the intake pipe of the internal combustion engine to adjust the valve opening.

[0015] The above one or more technical solutions have the following beneficial effects:

[0016] (1) The valve controller provided by this invention is mainly used in the internal combustion engine starting system. By installing an electric single-seat regulating valve on the gas intake pipe of the internal combustion engine, the valve controller can reasonably control the opening time and opening degree of the electric single-seat regulating valve when the internal combustion engine starts, thereby controlling the gas intake volume. This solves the problem that the gas intake volume cannot be controlled during the starting process of existing internal combustion engines, and ultimately improves the starting success rate of the internal combustion engine unit.

[0017] (2) The valve controller provided by the present invention has a built-in switch signal acquisition module and a speed signal acquisition module. The acquisition modules are equipped with optocouplers to achieve electrical isolation, thereby achieving anti-interference capability during signal acquisition, ensuring stable signal transmission, and improving the reliability of valve control.

[0018] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 is a schematic diagram of the valve settings on the intake pipe of an existing internal combustion engine.

[0021] Figure 2 is a flowchart of the existing internal combustion engine start-up process.

[0022] Figure 3 is a schematic diagram of the valve arrangement on the intake pipe of the internal combustion engine in the first embodiment.

[0023] Figure 4 is a schematic diagram of the valve controller connecting the relay contacts in the first embodiment.

[0024] Figure 5 is a front view of the housing of the valve controller of the first embodiment.

[0025] Figure 6(a) is a circuit diagram of the microprocessor in the first embodiment.

[0026] Figure 6(b) is a schematic diagram of the indicator light circuit of the first embodiment.

[0027] Figure 6(c) is a schematic diagram of the storage module circuit of the first embodiment.

[0028] Figure 6(d) is a schematic diagram of the reset module circuit in the first embodiment.

[0029] Figure 6(e) is a schematic diagram of the power-on self-reset circuit of the first embodiment.

[0030] Figure 6(f) is a schematic diagram of the decoupling capacitor in the first embodiment.

[0031] Figure 6(g) shows the debugging and upgrade port of the controller in the first embodiment.

[0032] Figure 6(h) is a schematic diagram of the display module circuit of the first embodiment.

[0033] Figure 7(a) is a circuit diagram of the switch quantity acquisition module of the first embodiment.

[0034] Figure 7(b) is a circuit diagram of the current signal output module of the first embodiment.

[0035] Figure 7(c) is a schematic diagram of the RS485 bus communication circuit of the first embodiment.

[0036] Figure 7(d) is a schematic diagram of the power module circuit of the first embodiment.

[0037] Figure 7(e) is a terminal block circuit diagram of the first embodiment.

[0038] Figure 8 is a schematic diagram of the Hall speed sensor installation in the first embodiment.

[0039] Figure 9 is a flowchart of the method in the second embodiment.

[0040] In the diagram, 1 is the valve controller housing, 101 is the guide rail groove, 102 is the mounting and dismounting clamp, 2 is the Hall speed sensor, 3 is the fastening nut, 4 is the bracket, 5 is the wire, and 6 is the rotating gear to be tested. Detailed Implementation

[0041] Example 1

[0042] This embodiment discloses a valve controller for starting an internal combustion engine, including a microprocessor and a switch signal acquisition module, a speed signal acquisition module, and a current signal output module, which are electrically connected to the microprocessor respectively.

[0043] The switch signal acquisition module is used to acquire the switch signal of the solenoid valve on the intake manifold of the internal combustion engine, and the speed signal acquisition module is used to acquire the speed signal of the internal combustion engine.

[0044] The microprocessor analyzes and processes the collected data, and then outputs a current signal to the electric single-seat regulating valve on the intake manifold of the internal combustion engine through the current signal output module to adjust the valve opening of the electric single-seat regulating valve.

[0045] As shown in Figure 3, the gas solenoid valve and the electric single-seat regulating valve are installed on the intake pipe of the internal combustion engine; the outlet of the intake pipe of the internal combustion engine is connected to the internal combustion engine, and from the outlet to the inlet of the intake pipe of the internal combustion engine, there are a manual valve, a gas solenoid valve, an electric single-seat regulating valve and a pressure regulating valve respectively.

[0046] The valve controller's digital input acquisition module is electrically connected to the normally closed contact of the solenoid valve relay coil. The valve controller controls the opening degree of the electric single-seat regulating valve based on whether a digital input signal is acquired, including:

[0047] When the unit is shut down, the solenoid valve relay coil is not energized, the normally closed contact is closed, and the microprocessor control current signal output module outputs 4mA current, so that the electric single-seat regulating valve is in the closed state.

[0048] When the solenoid valve relay coil is energized, the switch quantity acquisition module acquires the normally closed contact opening signal, and the microprocessor controls the current signal output module to linearly increase the output current value from 4mA to 20mA within a set time, so that the electric single-seat regulating valve slowly opens from the closed state to fully open.

[0049] The valve controller controls the opening degree of the electric single-seat regulating valve based on changes in the rotation speed signal, including:

[0050] When the unit starts, the microprocessor determines whether the collected engine speed exceeds the first threshold (the first threshold is 10 rpm in this embodiment). If so, the control current signal output module linearly increases the output current value from 4mA to 20mA within a set time, so that the electric single-seat regulating valve slowly opens from the closed state to fully open.

[0051] When the unit stops, the microprocessor determines whether the collected engine speed is lower than the second threshold (the second threshold is 30 rpm in this embodiment). If so, the control current signal output module outputs 4mA current to close the electric single-seat regulating valve.

[0052] As shown in Figure 5, the valve controller also includes a housing; the microprocessor, the switch signal acquisition module, the speed signal acquisition module and the current signal output module are all located inside the housing; a guide rail groove 101 is provided on one side of the housing 1, and a mounting and disassembling clamp 102 is provided at one end of the housing, which is intended to facilitate the installation and disassembly of the valve controller.

[0053] The upper surface of the housing is provided with a display module and an indicator light module, which are electrically connected to the microprocessor.

[0054] The display module is used to display data such as the control mode, output current value, and speed of the valve controller; the indicator module includes a power status indicator (Power), a device working status indicator (RUN), and communication receiving status (RX) and transmitting status indicator (TX);

[0055] Specifically: When using speed control, the current speed will be displayed at the top of the screen, with the unit being revolutions per minute (rpm); the bottom of the screen will display the current value output by the valve controller's output terminal mA OUT, with the unit being mA.

[0056] When the valve controller is connected to power, the "Power" indicator light will illuminate, indicating that power has been connected; when the valve controller is connected to power, the "RUN" indicator light will flash, indicating that the internal control circuit is working normally.

[0057] The communication receive status indicator "RX" and the transmit status indicator "TX" are used to indicate the communication status of the valve controller, respectively; when "RX" is lit, it indicates that data is being received during RS485 communication; when "TX" is lit, it indicates that data is being transmitted during RS485 communication.

[0058] The upper terminals of the valve controller, from right to left, are 24V+, GND, GND, mA OUT, DI1, DICOM, DI2, DICOM, and DI3.

[0059] Among them: 24V+ and GND are power supply terminals, used to connect to DC24V power supply;

[0060] GND and mA OUT are current signal output terminals, used to output 4-20mA current signals to the electric single-seat regulating valve;

[0061] DI1, DICOM, and DI2 are digital input terminals, which are connected to the normally closed contacts of the gas solenoid valve relay in the generator set; DI1 and DI2 are two digital input terminals, and DICOM is the common terminal for the two digital input terminals.

[0062] When the “DI1, DI COM” switches are closed, mA OUT outputs a 4mA current; when the “DI1, DI COM” switches are open, mA OUT will linearly increase from 4mA to 20mA within a set time (usually 10 seconds).

[0063] When the unit control system issues a start-up command, the solenoid valve relay is energized, the normally closed contact of the relay opens, and the electric single-seat regulating valve slowly opens according to the 4-20mA current value output by the valve controller. When the unit shuts down, the solenoid valve relay is de-energized, the normally closed contact of the relay closes, and the electric single-seat regulating valve closes.

[0064] When “DI2, DI COM” are connected, mA OUT will reach a current of 20mA within a set time (10 seconds); when “DI2, DICOM” are disconnected, mA OUT will output a current of 4mA. DI2 and DI1 cannot be connected to DI COM at the same time. If they are in this state, the output of mA OUT will maintain the original output current and will not respond to new signal inputs; “DI COM, DI3” are standby digital input terminals.

[0065] The lower terminals of the valve controller, from left to right, are: NC (dry connection), NC (dry connection), REV1 (speed input 1), REV2 (speed input 2), NC (dry connection), RS485A, RS485B, NC (dry connection), NC (dry connection).

[0066] The speed input signal input terminal and the switch input terminal can be wired as needed. When the speed control mode is selected, the valve controller can display the speed value in real time. When the valve controller receives an engine speed signal exceeding 10 rpm (adjustable), the output terminal mA OUT of the valve controller will linearly increase the output current from 4mA to 20mA within a set time (usually 10 seconds, adjustable). If the unit is stopped and the speed is below 30 rpm, the output terminal mA OUT of the valve controller will output 4mA current.

[0067] The valve controller provided by this invention has two signal input control methods: switch input and speed input.

[0068] (1) Switch input control method

[0069] Connect the passive normally closed contact of the solenoid valve power control relay of the natural gas automated unit to "DI1, DICOM"; when the unit is in the shutdown state, the solenoid valve relay is not energized, the contact is closed, the output terminal mA OUT of the valve controller outputs 4mA current, and the electric single-seat regulating valve is in the closed state.

[0070] When the unit control system issues a start-up command, the solenoid valve relay is energized, the normally closed contact opens, and the electric single-seat regulating valve slowly opens according to the 4-20mA current value output by the valve controller. When the unit shuts down again, the solenoid valve relay is de-energized, the normally closed contact closes, and the electric single-seat regulating valve closes.

[0071] (2) Speed ​​input control method

[0072] If the natural gas automated unit is equipped with a spare speed sensor, a speed input control method can be used. The unit's speed sensor signal needs to be connected to the speed signal input terminal REV of the valve controller. The valve controller can then control the opening and closing of the electric single-seat regulating valve based on changes in the speed signal.

[0073] When the engine speed signal rises above 10 rpm (adjustable), mA OUT will linearly increase the output current from 4mA to 20mA within a set time (usually 10 seconds, adjustable), causing the electric single-seat regulating valve to slowly open from the closed state. If the unit stops and the speed drops below 30 rpm, mA OUT will output 4mA current, and the electric single-seat regulating valve will close.

[0074] The appropriate control method for the two valve controller options above should be selected based on the specific configuration of the natural gas generator set. Regardless of the option used, the starting success rate of the internal combustion engine generator set can reach or approach 100%, ensuring that the natural gas generator set can achieve the same starting success rate as the diesel generator set.

[0075] Figure 6(a) shows the circuit schematic of the microprocessor provided in the embodiment of the present invention. The microprocessor is the AT89S52 microcontroller, which is a low-power, high-performance CMOS 8-bit microcontroller.

[0076] Figure 6(b) shows the schematic diagram of the indicator circuit provided in the embodiment of the present invention. The indicator circuit includes multiple light-emitting diodes D200, D201, D202, and D203 connected in parallel. One end of the light-emitting diodes D200, D201, D202, and D203 is connected to the power supply VCC-T through resistors R200, R201, R202, and R203, respectively. The other end is connected to the pins TX-T, RX-T, RUN, and GND-T (pins 7, 5, 22, and 16) of the AT89S52 microcontroller, respectively.

[0077] LEDs D200, D201, D202, and D203 are power status indicator, device operation status indicator, and communication reception and transmission status indicator, respectively, used to indicate the corresponding status according to different control signals from the microprocessor.

[0078] Figure 6(c) shows the schematic diagram of the storage module circuit electrically connected to the microprocessor provided in the embodiment of the present invention; the storage module uses the AT24C16 storage chip. The pin functions of the AT24C16 storage chip mainly include: (1) Address lines: A0, A1, and A2 pins are used to determine the hardware address of the chip and ensure that the data is correctly sent to the target chip; (2) Power lines: Pins 8 and 4 (GND and VCC) are positive and negative power supplies, respectively, used to provide the power required for the chip to work; (3) Data lines: SDA pin is a serial data input / output pin, used for serial data transmission through the I2C bus; (4) Clock lines: SCL pin is a serial clock pin, used together with SDA for synchronous data transmission; (5) Read / write pin WC, which allows the chip to perform general read and write operations.

[0079] The AT24C16 memory chip's pins WC, CSL, and SDA (pins 7, 6, and 5) are connected to the AT89S52 microcontroller's pins WC, CSK, and SDA (pins 34, 35, and 36), respectively, enabling efficient data transfer between the microcontroller and the memory chip.

[0080] Figure 6(d) shows the circuit schematic of the reset module electrically connected to the microprocessor provided in this embodiment of the invention. The reset module uses the MAX813 chip. By setting the reset module, automatic reset and manual reset can be realized when power is on, power is off, or the program crashes. At the same time, power failure can be monitored in real time so as to save data in a timely manner.

[0081] Pin 7 (RESET, i.e., reset output) of the MAX813 chip is the reset signal output terminal of the MAX813L. When a power failure or watchdog timeout is detected, a reset pulse will be output, which will be used to reset the entire system through the reset input pin on the microcontroller.

[0082] Figure 6(e) shows the power-on self-reset circuit of the microcontroller, which ensures that the CPU resets and restarts normally after the microcontroller is powered on. When the system is powered on, the power supply may experience brief fluctuations, which may cause the CPU to malfunction and lead to system instability. To ensure reliable system operation, a CPU reset stabilization circuit is added. In Figure 6(e), C202 and R207 together form the power-on reset circuit. Due to the principle that the voltage across the capacitor cannot change abruptly, the CPU reset pin will not fluctuate due to power supply instability, ensuring normal CPU startup.

[0083] Figure 6(f) shows a decoupling capacitor composed of multiple ceramic capacitors, which are arranged at the power input terminals of each chip. Since the current required by the CPU and other chips varies during high-speed operation, decoupling capacitors are added at the power input terminals of the chips to ensure the overall stability of the power supply system by utilizing the principle that the voltage across the capacitor cannot change abruptly.

[0084] In Figure 6(g), J202 and J204 are the system's debugging and firmware upgrade interfaces, respectively. Through these two interfaces, the CPU's firmware can be upgraded.

[0085] Figure 6(h) shows the circuit schematic of the display module provided in an embodiment of the present invention; the display module includes a multi-bit LED display driver chip MAX7219 and a first LED display screen and a second LED display screen. The MAX7219 chip is used to receive the output signal of the microprocessor and control the first LED display screen and the second LED display screen to display the rotation speed value and the output current value.

[0086] As shown in Figure 7(a), the switch quantity acquisition module includes an optocoupler, a diode, and a filter circuit. The input side of the optocoupler is connected to the filter circuit through the diode, and the filter circuit is electrically connected to the normally closed contact of the solenoid valve relay. The output side of the optocoupler is electrically connected to the microprocessor.

[0087] The filter circuit includes an inductor FB and a resistor R connected in series. One end of the resistor R is electrically connected to a diode D. A capacitor C is connected in parallel across the two ends of the inductor FB and the resistor R, as well as at the connection point of the inductor FB and the resistor R.

[0088] In this embodiment, the switch quantity acquisition circuit is a switch state measurement circuit with opto-isolation. It includes three acquisition circuits, each with the same structure, consisting of an optocoupler, a diode, and a filter circuit (optocoupler module). The voltage range of the input side (DI1, DI2, DI3) of the optocoupler module is 0-30V, and the output side (D0, D1, D2) of the optocoupler module is connected to the input terminal of the CPU, with a voltage range of 0-3.3V.

[0089] This invention employs optocouplers to achieve switch status acquisition and provides electrical isolation. The switch status acquisition module functions to acquire the normally closed contacts of the solenoid valve relay (these contacts are open when the unit starts and closed when the unit stops) to monitor the engine's start and stop status, thereby providing signals to the main control unit.

[0090] The speed signal acquisition module includes a Hall sensor and an optocoupler circuit. The Hall sensor is mounted on one side of the engine via a bracket. It measures the engine speed and converts it into a current signal, which is then transmitted to the microprocessor via the optocoupler circuit.

[0091] In this embodiment, the speed signal acquisition module uses an optocoupler circuit to acquire the real-time speed signal of the engine and transmit it to the microprocessor. The optocoupler circuit in the speed signal acquisition module has the same structure as the optocoupler circuit in the switch quantity acquisition module, that is, both are electrically isolated by using the optocoupler device TLP181.

[0092] As shown in Figure 8, the Hall speed sensor 2 is fixedly installed on one side of the rotating gear 6 being measured via a bracket 4. The bracket 4 is equipped with a fastening nut 3. The Hall speed sensor 2 is connected to the speed signal acquisition terminal on the valve controller via a wire 5.

[0093] In this embodiment, a Hall effect speed sensor is used to detect the undulations of the engine flywheel. The output signal of the Hall effect speed sensor corresponds to a high or low level change. When the high or low level change output by the Hall effect speed sensor is transmitted to a pin of the microprocessor CPU after optocoupler isolation, the CPU calculates the number of detected high and low levels per unit time, thus determining how many flywheel undulations were detected. Because the number of flywheel teeth is fixed, the engine speed can be calculated.

[0094] As shown in Figure 7(b), the current signal output module includes a digital-to-analog converter and an optocoupler; the input side of the optocoupler TPL181 is connected to the SPI interface of the microprocessor through a resistor, and the output side of the optocoupler TPL181 is connected to the digital-to-analog converter.

[0095] The input terminal of the optocoupler is connected to the SPI interface of the microprocessor. The digital signal calculated and processed by the microprocessor is transmitted from the microprocessor's SPI interface to the analog-to-digital converter (ADC) through the optocoupler. The ADC converts the digital signal calculated by the CPU into a 4-20mA analog signal output.

[0096] In this embodiment, the current signal output circuit uses the AD421 digital-to-4-20mA dedicated chip. The AD421 chip converts the opening signal output by the main control power supply to the valve, so that the valve can perform different opening degrees according to the 4-20mA value. An opto-isolation design is adopted to use an optocoupler to opto-isolate the digital signal from the analog signal.

[0097] Figure 7(c) shows the original circuit diagram of the RS485 bus communication circuit provided in the embodiment of the present invention;

[0098] Figure 7(d) shows the power supply circuit provided in an embodiment of the present invention. This circuit converts the input DC24V into isolated DC5V and supplies power to the system via two DC5V channels; it also supplies power to the microprocessor and RS485 communication circuit respectively.

[0099] Figure 7(e) shows a signal terminal block provided in an embodiment of the present invention. One end of the terminal block is connected to various modules inside the valve controller, and the other end is connected to external devices such as electric regulating valves.

[0100] Example 2

[0101] As shown in Figure 9, this embodiment discloses an internal combustion engine starting control method based on the valve controller of Embodiment 1. The method includes:

[0102] Acquire the speed signal of the internal combustion engine;

[0103] Acquire the switching signals of the solenoid valve on the intake manifold of the internal combustion engine;

[0104] The collected speed signal or switching signal is analyzed and processed, and a current signal is output to the electric single-seat regulating valve on the intake pipe of the internal combustion engine to adjust the valve opening.

[0105] The control of the opening degree of the electric single-seat regulating valve based on whether a switching signal is acquired includes:

[0106] When the unit is in a shutdown state, the solenoid valve relay coil is not energized, the normally closed contact closes, and outputs 4mA current to the electric single-seat regulating valve, causing the electric single-seat regulating valve to close.

[0107] When the solenoid valve relay coil is energized, it acquires the signal of the normally closed contact opening, and linearly increases the output current value from 4mA to 20mA within a set time, so that the electric single-seat regulating valve slowly opens from the closed state to fully open.

[0108] The control of the opening degree of the electric single-seat regulating valve based on changes in the rotational speed signal includes:

[0109] When the collected engine speed exceeds the first threshold, the output current value is linearly increased from 4mA to 20mA within a set time, so that the electric single-seat regulating valve slowly opens from the closed state to fully open.

[0110] When the collected engine speed is lower than the second threshold, a 4mA current is output to the electric single-seat regulating valve, causing the valve to close.

[0111] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0112] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A valve controller for starting an internal combustion engine, characterized in that, The system includes a microprocessor and a switch signal acquisition module, a speed signal acquisition module, and a current signal output module, all electrically connected to the microprocessor. The switch signal acquisition module acquires the switch signals of the solenoid valve on the internal combustion engine's gas intake pipe, and the speed signal acquisition module acquires the engine's speed signal. The switch signal acquisition module includes an optocoupler, a diode, and a filter circuit. The input side of the optocoupler is connected to the filter circuit via the diode, and the filter circuit is electrically connected to the normally closed contact of the solenoid valve relay. The output side of the optocoupler is electrically connected to the microprocessor. The microprocessor analyzes and processes the acquired data and then outputs a current signal to the electrically operated single-seat regulating valve on the internal combustion engine's gas intake pipe via the current signal output module to adjust the valve opening. The output module includes an optocoupler and a digital-to-analog converter (DAC). The input side of the optocoupler is connected to the microprocessor's SPI interface via a resistor, and the output side of the optocoupler is connected to the digital signal input terminal of the DAC. The analog signal output terminal of the DAC is used to output a 4-20mA current signal. The valve controller controls the opening degree of the electric single-seat regulating valve based on whether a switching signal is acquired. Specifically: when the unit is stopped, the solenoid valve relay coil is not energized, the normally closed contact is closed, and the microprocessor controls the current signal output module to output a 4mA current, keeping the electric single-seat regulating valve closed; when the solenoid valve relay coil is energized, the switching signal acquisition module acquires a signal indicating that the normally closed contact has opened, and the microprocessor controls the current signal output module to linearly increase the output current value from 4mA to 20mA within a set time. mA, causing the electric single-seat regulating valve to slowly open from the closed state to fully open; or, controlling the opening of the electric single-seat regulating valve according to the change of speed signal, including: when the unit starts, the microprocessor determines whether the collected engine speed exceeds the first threshold. If so, it controls the current signal output module to linearly increase the output current value from 4mA to 20mA within a set time, causing the electric single-seat regulating valve to slowly open from the closed state to fully open; when the unit stops, the microprocessor determines whether the collected engine speed is lower than the second threshold. If so, it controls the current signal output module to output 4mA current, causing the electric single-seat regulating valve to close.

2. A valve controller for starting an internal combustion engine according to claim 1, characterized in that, It also includes a housing, and the microprocessor, the switch signal acquisition module, the speed signal acquisition module and the current signal output module are all located inside the housing.

3. A valve controller for starting an internal combustion engine according to claim 2, characterized in that, The upper surface of the housing is provided with a display module and an indicator light module, which are electrically connected to the microprocessor.

4. A valve controller for starting an internal combustion engine according to claim 1, characterized in that, The speed signal acquisition module includes a Hall speed sensor and an optocoupler circuit. The Hall speed sensor is mounted on one side of the engine via a bracket and is used to measure the engine speed and convert it into a current signal, which is then transmitted to the microprocessor via the optocoupler circuit.

5. A starting control method for an internal combustion engine, characterized in that, Based on the valve controller according to any one of claims 1-4, the method includes: acquiring the speed signal of the internal combustion engine; acquiring the switching signal of the solenoid valve on the gas intake pipe of the internal combustion engine; analyzing and processing the acquired speed signal or switching signal, and outputting a current signal to the electric single-seat regulating valve on the gas intake pipe of the internal combustion engine to adjust the valve opening of the electric single-seat regulating valve.

6. The method according to claim 5, characterized in that, The method of controlling the opening of the electric single-seat regulating valve based on whether a switching signal is acquired includes: when the unit is stopped, the solenoid valve relay coil is not energized, the normally closed contact is closed, and a 4mA current is output to the electric single-seat regulating valve, causing the valve to close; when the solenoid valve relay coil is energized, a signal indicating that the normally closed contact has opened is acquired, and the output current value is linearly increased from 4mA to 20mA within a set time, causing the electric single-seat regulating valve to slowly open from the closed state to fully open; or, controlling the opening of the electric single-seat regulating valve based on changes in the engine speed signal includes: when the unit is started, when the acquired engine speed exceeds a first threshold, the output current value is linearly increased from 4mA to 20mA within a set time, causing the electric single-seat regulating valve to slowly open from the closed state to fully open; when the unit is stopped, when the acquired engine speed is lower than a second threshold, a 4mA current is output to the electric single-seat regulating valve, causing the valve to close.

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