Valve controller for starting internal combustion engine and control method

Abstract

The invention belongs to the technical field of internal combustion engines, and particularly relates to a valve controller for starting an internal combustion engine and a control method, and the valve controller comprises a microprocessor, and a switching value acquisition module, a rotating speed signal acquisition module and a current signal output module which are electrically connected with the microprocessor; the switching value acquisition module is used for acquiring a switching value signal of an electromagnetic valve on an air inlet pipeline of the internal combustion engine; the rotating speed signal acquisition module is used for acquiring a rotating speed signal of the internal combustion engine; the microprocessor is used for analyzing and processing the collected data and then outputting a current signal to an electric single-seat adjusting valve on an air inlet 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 adjusting valve. The opening time and the opening degree of the electric single-seat adjusting valve are reasonably controlled through the valve controller, so that the gas inflow is controlled, and finally the starting success rate of the internal combustion engine unit is increased.

Description

Technical Field

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

[0002] The statements in this section merely provide background 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 the following purposes: as emergency backup power supply when the city power is off, or as unattended automatic gas power station with black start function. Generator sets for these purposes require high start success rate and fast start speed. However, since there are only gas solenoid valves and pressure regulating valves on the gas pipeline of the unit, when the unit is started, the solenoid valve opens, the gas intake volume is large, the concentration is too high, and there is often a phenomenon of ignition failure, which leads to a low start success rate and start failure, affecting on-site use.

[0004] (1) The valve arrangement on the existing internal combustion engine intake pipe is as follows Figure 1 As shown, the existing internal combustion engine generator set gas intake pipeline includes a manual shut-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 is started, the gas intake time and flow cannot be controlled, resulting in a large gas intake volume and high concentration, which is difficult to ignite and reduces the starting success rate.

[0005] (2) The existing unit startup process is as follows Figure 2 As shown in the figure, because the automatic unit is in operation or hot standby state for a long time, the manual shut-off valve is in the open position for a long time. When the unit receives the start command, the unit solenoid valve is automatically energized to open, the start relay of the internal combustion engine electric starting system is energized, and the motor starts to drive the flywheel to work. When the speed reaches a certain value, the unit starts successfully. However, since the solenoid valve is fully open, the gas intake volume cannot be controlled in the initial start-up period. If the gas intake volume is large and the concentration is high, the start-up success rate will be low. Summary of the invention

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a valve controller and a control method for starting an internal combustion engine.

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

[0008] A first aspect of the present invention provides a valve controller for starting an internal combustion engine, comprising a microprocessor and a switch quantity acquisition module, a speed signal acquisition module and a current signal output module electrically connected to the microprocessor respectively;

[0009] The switch quantity acquisition module is used to acquire the switch quantity signal of the solenoid valve on the intake pipe 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 is used to analyze and process the collected data, and then output 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 an internal combustion engine starting control method, based on the valve controller of the first aspect of the present invention, the method comprises:

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

[0013] Collect the switch signal of the solenoid valve on the intake pipe of the internal combustion engine;

[0014] The collected speed signal or switch 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 of the electric single-seat regulating valve.

[0015] One or more of the above technical solutions have the following beneficial effects:

[0016] (1) The valve controller provided by the present 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, when the internal combustion engine is started, the valve controller reasonably controls the opening time and opening degree of the electric single-seat regulating valve, thereby controlling the gas intake amount, solving the problem that the gas intake amount cannot be controlled during the start-up process of the existing internal combustion engine, and ultimately improving the start-up 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, and a photoelectric coupler is provided in each acquisition module to achieve electrical isolation, thereby realizing anti-interference capability during the signal acquisition process, ensuring stable signal transmission, and improving the reliability of valve control.

[0018] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

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

[0021] Figure 2 Start the flow chart for an existing internal combustion engine.

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

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

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

[0025] FIG6(a) is a circuit diagram of a microprocessor according to the first embodiment.

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

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

[0028] FIG6( d ) is a schematic diagram of the reset module circuit of the first embodiment.

[0029] FIG6( e ) is a schematic diagram of the power-on self-reset circuit of the first embodiment.

[0030] FIG6( f ) is a schematic diagram of the decoupling capacitor of the first embodiment.

[0031] FIG6( g ) is a debugging and upgrading port of the controller of the first embodiment.

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

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

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

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

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

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

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

[0039] Fig. 9 This is a flow chart of the method of the second embodiment.

[0040] In the figure, 1, the housing of the valve controller, 101, the guide groove, 102, the loading and unloading hoop, 2, the Hall speed sensor, 3, the fastening nut, 4, the bracket, 5, the wire, 6, the rotating gear to be measured. DETAILED DESCRIPTION

[0041] Embodiment 1

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

[0043] The switch quantity acquisition module is used to acquire the switch quantity signal of the solenoid valve on the intake pipe 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 is used to analyze and process the collected data, and then output the 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.

[0045] like Figure 3 As shown, the gas solenoid valve and the electric single-seat regulating valve are arranged 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 direction of the intake pipe of the internal combustion engine, a manual valve, a gas solenoid valve, an electric single-seat regulating valve and a pressure regulating valve are respectively arranged.

[0046] The switch quantity acquisition module of the valve controller is electrically connected to the normally closed contact of the solenoid valve relay coil. The valve controller controls the opening of the electric single-seat regulating valve according to whether the switch quantity signal is collected, including:

[0047] When the unit is in shutdown state, the solenoid valve relay coil shall not be energized, the normally closed contact is closed, and the microprocessor controls the current signal output module to output 4mA current, so that the electric single-seat regulating valve is in the closed state;

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

[0049] The valve controller controls the opening of the electric single-seat regulating valve according to the change of the speed signal, including:

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

[0051] When the unit is shut down, 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 current signal output module is controlled to output 4mA current to close the valve of the electric single-seat regulating valve.

[0052] like Figure 5 As shown, the valve controller also includes a shell; the microprocessor, the switch quantity acquisition module, the speed signal acquisition module and the current signal output module are all arranged inside the shell; a guide groove 101 is provided on one side of the shell 1, and a loading and unloading hoop 102 is provided at one end of the shell to facilitate the installation and disassembly of the valve controller.

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

[0054] The display module is used to display the control mode, output current value, speed and other data of the valve controller; the indicator light module includes the power status indicator light (Power), the equipment working status indicator light (RUN), and the communication receiving status (RX) and sending status indicator lights (TX);

[0055] Specifically: When the speed control mode is adopted, the current speed will be displayed in the upper part of the display screen, and the unit of speed is revolutions per minute; the lower part of the display screen displays the current value output by the valve controller output terminal mA OUT, and the unit is mA.

[0056] When the valve controller is connected to the power supply, the "Power" indicator lights up, indicating that the power supply has been connected; when the valve controller is connected to the power supply, the "RUN" indicator flashes, indicating that the internal control circuit is working normally;

[0057] The communication receiving status indicator light "RX" and sending status indicator light "TX" are used to indicate the communication status of the valve controller; when "RX" is on, it is receiving data during RS485 communication; when "TX" is on, it is sending data during RS485 communication.

[0058] The terminals on the upper part of the valve controller from right to left are 24V+, GND, GND, mA OUT, DI1, DI COM, DI2, DICOM, 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, DI COM, and DI2 are switch input terminals, which are connected to the normally closed contacts of the gas solenoid valve relay of the unit; DI1 and DI2 are two switch input terminals, and DI COM is the common terminal of the two switch quantities;

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

[0063] When the unit control system issues a start command, the solenoid valve relay is energized, the normally closed contacts of the relay are disconnected, and the electric single-seat regulating valve will slowly open the electric single-seat regulating valve according to the 4-20mA current value output by the valve controller. When the unit is shut down, the solenoid valve relay loses power, the normally closed contacts of the relay are closed, and the electric single-seat regulating valve is closed.

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

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

[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 the engine speed signal exceeding 10 rpm (settable), the output terminal mA OUT of the valve controller will increase the output current linearly from 4mA to 20mA within the set time (generally 10 seconds, settable); if the speed is lower than 30 rpm when the unit is shut down, the output terminal mA OUT of the valve controller will output 4mA current.

[0067] The valve controller provided by the present invention has two signal input control modes, namely switch value 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 automation unit to "DI1, DICOM"; when the unit is shut down, the solenoid valve relay shall not be 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 control system of the unit issues a start command, the solenoid valve relay is energized, the normally closed contact is disconnected, and the electric single-seat regulating valve will slowly open the electric single-seat regulating valve according to the 4-20mA current value output by the valve controller. When the unit is shut down again, the solenoid valve relay loses power, the normally closed contact is closed, and the electric single-seat regulating valve is closed.

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

[0072] If the natural gas automation unit is equipped with a spare speed sensor, the speed input control method can be used. The speed sensor signal of the unit needs to be connected to the speed signal input terminal REV of the valve controller. The valve controller can control the switch and opening control of the electric single-seat regulating valve according to the change of the speed signal.

[0073] When the engine speed signal rises by more than 10 rpm (settable), mA OUT will increase the output current linearly from 4mA to 20mA within the set time (generally 10 seconds, settable), so that the electric single-seat control valve slowly opens from the closed state to the fully open state; if the unit is shut down and the speed drops below 30 rpm, mA OUT outputs 4mA current and the electric single-seat control valve closes.

[0074] The two control schemes of the valve controller above can select the appropriate control method according to the specific configuration of the natural gas unit. No matter which scheme is adopted, the starting success rate of the internal combustion engine generator set can reach or approach 100%, ensuring that the internal combustion engine natural gas generator set can achieve the same starting success rate as the internal combustion engine diesel generator set.

[0075] FIG6( a ) is a schematic diagram of a microprocessor circuit according to an embodiment of the present invention. The microprocessor is an AT89S52 single-chip microcomputer, which is a low-power, high-performance CMOS 8-bit microcontroller.

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

[0077] The light emitting diodes D200, D201, D202 and D203 are respectively a power status indicator light (Power), a device working status indicator light (RUN) and a communication receiving status and sending status indicator light, and are used to indicate corresponding status according to different control signals of the microprocessor.

[0078] As shown in FIG6(c), a circuit schematic diagram of a storage module electrically connected to a microprocessor provided by an embodiment of the present invention is shown; the storage module adopts an AT24C16 storage chip, and the pin functions of the AT24C16 storage chip mainly include: (1) address line: A0, A1, and A2 pins are used to determine the hardware address of the chip to ensure that the data is correctly sent to the target chip; (2) power line: pin 8 and pin 4 (GND, VCC) are respectively positive and negative power supplies, which are used to provide the power required for the chip to work; (3) data line: SDA pin is a serial data input / output, which is used for serial transmission of data through the I2C bus; (4) clock line: SCL pin is a serial clock, which is used together with SDA for synchronous transmission of data; (5) read-write pin WC, which allows the chip to perform general read and write operations.

[0079] Pins WC, CSL, and SDA (pin 7, pin 6, and pin 5) of the AT24C16 memory chip are respectively connected to pins WC, CSK, and SDA (pin 34, pin 35, and pin 36) of the AT89S52 microcontroller, allowing data to be efficiently transmitted between the microcontroller and the memory chip.

[0080] As shown in Figure 6(d), it is a schematic diagram of the reset module circuit electrically connected to the microprocessor provided in an embodiment of the present invention; the reset module adopts the MAX813 chip. By setting the reset module, automatic reset and manual reset at any time when power is turned on, instantaneous power is lost, and the program runs "freeze" can be realized; at the same time, power failure can be monitored in real time so as to save data in time.

[0081] The 7th pin (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 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 briefly jitter, which may cause the CPU to operate abnormally, resulting in system instability. To ensure reliable operation of the system, a CPU reset stabilization circuit is added. In Figure 6(e), C202 and R207 together form a power-on reset circuit. Due to the principle that the voltage across the capacitor cannot change suddenly, the reset pin of the CPU will not jitter due to unstable power supply, ensuring that the CPU starts normally.

[0083] Figure 6(f) shows a decoupling capacitor composed of multiple ceramic capacitors, which are arranged at the power input end of each chip. Since the current required by the CPU and each chip is changing when running at high speed, decoupling capacitors are added to the input end of the chip to ensure the overall stability of the power system by using the principle that the voltage across the capacitor cannot change suddenly.

[0084] In FIG6( g ), J202 and J204 are the debugging and firmware upgrade interfaces of the system, respectively. The CPU firmware can be upgraded through the above two interfaces.

[0085] As shown in Figure 6(h), a circuit schematic diagram of a display module is 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 an output signal of a microprocessor and control the first LED display screen and the second LED display screen to display a rotational speed value and an output current value.

[0086] As shown in FIG7(a), the switch quantity acquisition module includes a photocoupler, a diode and a filter circuit. The input side of the photocoupler is connected to the filter circuit through a diode, and the filter circuit is electrically connected to the normally closed contact of the solenoid valve relay; the output side of the photocoupler 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, and capacitors C are connected in parallel at both ends of the inductor FB and the resistor R connected in series and at the connection end of the inductor FB and the resistor R, respectively.

[0088] In this embodiment, the switch quantity acquisition circuit is a switch state measurement circuit using photoelectric isolation, which includes three acquisition circuits, each of which has the same circuit structure and is composed of a photocoupler, a diode and a filter circuit (photocoupler module); the voltage range of the input side (DI1, DI2, DI3) of the photocoupler module is 0-30V, and the output side (D0, D1, D2) of the photocoupler module is connected to the input end of the CPU, and the voltage range of this part is 0-3.3V.

[0089] The present invention uses a photoelectric coupling device to realize the switch state acquisition function and realize electrical isolation. The switch quantity acquisition module function includes collecting the normally closed contact of the electromagnetic valve relay (the contact is open when the unit is started and closed when the unit is stopped) to achieve the start and stop state monitoring of the engine, thereby providing a signal to the main control unit.

[0090] The speed signal acquisition module includes a Hall sensor and a photoelectric coupling circuit; the Hall sensor is installed on one side of the engine through a bracket, and is used to measure the engine speed and convert it into a current signal, which is then transmitted to the microprocessor through the photoelectric coupling circuit.

[0091] In this embodiment, the speed signal acquisition module adopts a photoelectric coupling circuit to collect the real-time speed signal of the engine and transmit it to the microprocessor; the photoelectric coupling circuit in the speed signal acquisition module has the same structure as the photoelectric coupling circuit in the switch quantity acquisition module, that is, both use the photoelectric coupling device TLP181 to achieve electrical isolation.

[0092] like Figure 8 As shown, the Hall speed sensor 2 is fixedly installed on one side of the rotating gear 6 to be measured through a bracket 4, a fastening nut 3 is provided on the bracket 4, and the Hall speed sensor 2 is connected to the speed signal acquisition terminal on the valve controller through a wire 5.

[0093] In this embodiment, a Hall speed sensor is used to detect the uneven changes of the engine flywheel, and the output signal of the Hall speed sensor outputs a one-to-one high and low level change. When the high and low levels output by the Hall speed sensor are isolated by an optical coupler, the signal is transmitted to the pin of the microprocessor CPU; the CPU calculates the number of high and low levels detected in a unit time, and can calculate how many flywheel uneven changes are detected. Because the number of flywheel teeth is fixed, the engine speed can be calculated.

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

[0095] The input end of the optocoupler is connected to the SPI interface of the microprocessor. The digital signal calculated and processed by the microprocessor is transmitted to the analog-to-digital converter through the SPI interface of the microprocessor through the optocoupler; the digital-to-analog converter converts the digital signal calculated by the CPU into a 4-20mA analog signal output.

[0096] In this embodiment, the current signal output circuit adopts a digital to 4-20mA dedicated chip AD421. The AD421 chip converts the opening signal output by the main control power supply to the valve, so that the valve can perform different openings according to the size of 4-20mA. A photoelectric isolation design is adopted, and a photoelectric coupler is used to perform photoelectric isolation between the digital signal and the analog signal.

[0097] As shown in FIG. 7( c ), the original circuit diagram of the RS485 bus communication circuit provided in an embodiment of the present invention is shown;

[0098] As shown in FIG. 7( d ), a power supply circuit according to an embodiment of the present invention is provided. The circuit converts the input DC24V into an isolated 2-way DC5V to power the system; power is provided to the microprocessor and the RS485 communication circuit respectively.

[0099] As shown in FIG. 7( e ), a signal terminal block is provided in an embodiment of the present invention, one end of which is connected to various modules inside the valve controller, and the other end is connected to external devices such as an electric control valve.

[0100] Embodiment 2

[0101] like Fig. 9 As shown, this embodiment discloses a method for controlling the starting of an internal combustion engine, based on the valve controller of the first embodiment, the method includes:

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

[0103] Collect the switch signal of the solenoid valve on the intake pipe of the internal combustion engine;

[0104] The collected speed signal or switch 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 of the electric single-seat regulating valve.

[0105] Among them, the opening of the electric single-seat regulating valve is controlled according to whether the switch quantity signal is collected, including:

[0106] When the unit is in shutdown state, the solenoid valve relay coil shall not be energized, the normally closed contact is closed, and a 4mA current is output to the electric single-seat regulating valve, so that the valve of the electric single-seat regulating valve is closed;

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

[0108] Among them, controlling the opening of the electric single-seat regulating valve according to the change of the 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 the set time, so that the valve of the electric single-seat regulating valve is slowly opened from the closed state to the fully opened state;

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

[0111] Those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computer device, or alternatively, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. The present invention is not limited to any specific combination of hardware and software.

[0112] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it 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 on the basis of the technical solution of the present invention without creative work 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: It includes a microprocessor and a switch quantity acquisition module, a speed signal acquisition module and a current signal output module which are electrically connected to the microprocessor respectively; The switch quantity acquisition module is used to acquire the switch quantity signal of the solenoid valve on the intake pipe of the internal combustion engine, and the speed signal acquisition module is used to acquire the speed signal of the internal combustion engine; The microprocessor is used to analyze and process the collected data, and then output 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.

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

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

4. A valve controller for starting an internal combustion engine according to claim 1, characterized in that: The switch quantity acquisition module includes a photoelectric coupler, a diode and a filter circuit. The input side of the photoelectric coupler is connected to the filter circuit through a diode, and the filter circuit is electrically connected to the normally closed contact of the solenoid valve relay; the output side of the photoelectric coupler is electrically connected to the microprocessor.

5. 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 a photoelectric coupling circuit; The Hall speed sensor is installed on one side of the engine through a bracket, and is used to measure the engine speed and convert it into a current signal, which is then transmitted to the microprocessor through a photoelectric coupling circuit.

6. A valve controller for starting an internal combustion engine according to claim 1, characterized in that: The current signal output module includes a photoelectric coupler and a digital-to-analog converter. The input side of the photoelectric coupler is connected to the SPI interface of the microprocessor through a resistor, and the output side of the photoelectric coupler is connected to the digital signal input end of the digital-to-analog converter; the analog signal output end of the digital-to-analog converter is used to output a 4-20mA current signal.

7. A valve controller for starting an internal combustion engine according to claim 1, characterized in that: The valve controller controls the opening of the electric single-seat regulating valve according to whether the switch quantity signal is collected, including: When the unit is in shutdown state, the solenoid valve relay coil shall not be energized, the normally closed contact is closed, and the microprocessor controls the current signal output module to output 4mA current, so that the electric single-seat regulating valve is in a closed state; When the solenoid valve relay coil is energized, the switch quantity acquisition module collects the normally closed contact disconnection signal, and the microprocessor controls the current signal output module to linearly increase the output current value from 4mA to 20mA within the set time, so that the valve of the electric single-seat regulating valve slowly opens from a closed state to a fully open state.

8. The valve controller for starting an internal combustion engine according to claim 1, characterized in that: The valve controller controls the opening of the electric single-seat regulating valve according to the change of the speed signal, including: The microprocessor determines whether the collected engine speed exceeds the first threshold value. If so, the microprocessor controls the current signal output module to linearly increase the output current value from 4mA to 20mA within the set time, so that the valve of the electric single-seat regulating valve is slowly opened from the closed state to the fully opened state; The microprocessor determines whether the collected engine speed is lower than the second threshold value. If so, the microprocessor controls the current signal output module to output a 4mA current so that the valve of the electric single-seat regulating valve is closed.

9. A method for controlling the start of an internal combustion engine, characterized in that: Based on the valve controller according to any one of claims 1 to 8, the method comprises: Collect the speed signal of the internal combustion engine; Collect the switch signal of the solenoid valve on the intake pipe of the internal combustion engine; The collected speed signal or switch 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 of the electric single-seat regulating valve.

10. The method according to claim 9, characterized in that The controlling of the opening of the electric single-seat regulating valve according to whether the switch quantity signal is collected comprises: When the unit is in shutdown state, the solenoid valve relay coil shall not be energized, the normally closed contact shall be closed, and a 4mA current shall be output to the electric single-seat regulating valve, so that the valve of the electric single-seat regulating valve is closed; When the solenoid valve relay coil is energized, the normally closed contact disconnection signal is collected, and the output current value is linearly increased from 4mA to 20mA within the set time, so that the valve of the electric single-seat regulating valve is slowly opened from the closed state to the fully open state; Alternatively, the opening of the electric single-seat regulating valve is controlled according to the change of the speed signal, including: When the collected engine speed exceeds the first threshold, the output current value is linearly increased from 4mA to 20mA within the set time, so that the valve of the electric single-seat regulating valve is slowly opened from the closed state to the fully opened state; When the collected engine speed is lower than the second threshold, a 4mA current is output to the electric single-seat regulating valve, so that the valve of the electric single-seat regulating valve is closed.

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