CN114704411A - Electromagnetic valve drive control method - Google Patents
Electromagnetic valve drive control method Download PDFInfo
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- CN114704411A CN114704411A CN202210395188.9A CN202210395188A CN114704411A CN 114704411 A CN114704411 A CN 114704411A CN 202210395188 A CN202210395188 A CN 202210395188A CN 114704411 A CN114704411 A CN 114704411A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0059—Arrangements of valve actuators
- F02M63/0061—Single actuator acting on two or more valve bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a drive control method of an electromagnetic valve, which comprises the following steps: receiving a first electromagnetic valve driving current waveform output signal to obtain a first current maintaining threshold; collecting electromagnetic valve driving current, generating a first electromagnetic valve driving current source turn-off signal when the electromagnetic valve driving current is greater than a first current maintaining threshold value, and generating a first electromagnetic valve driving current source turn-on signal when the electromagnetic valve driving current is less than the first current maintaining threshold value; when receiving a second electromagnetic valve driving current waveform output signal, acquiring a peak current threshold value and a second current maintaining threshold value; collecting the driving current of the electromagnetic valve, generating a second electromagnetic valve driving current source disconnection signal when the driving current of the electromagnetic valve is larger than a peak current threshold, generating a first electromagnetic valve driving current source connection signal when the driving current of the electromagnetic valve is smaller than a second current maintaining threshold, and generating a first electromagnetic valve driving current source disconnection signal when the driving current of the electromagnetic valve is larger than the second current maintaining threshold.
Description
Technical Field
The embodiment of the invention relates to an engine control technology, in particular to a drive control method of an electromagnetic valve.
Background
In a high-pressure common rail injection system of a diesel engine, in order to accurately control the injection quantity of the engine, strict requirements are imposed on the response time and the electromagnetic force of an electromagnetic valve of an oil injector, and a key factor influencing the performance of the electromagnetic valve is a current waveform applied to a coil of the electromagnetic valve, so that the current waveform of the oil injector needs to be strictly controlled in an oil injection control system to achieve the optimal performance of the oil injector.
In the process of debugging the oil injector, a large number of tests and verifications are needed, the current waveforms of the oil injector needed by the electromagnetic valve coils with different types of parameters are different, and the driving current waveforms commonly used for the electromagnetic valve of the oil injector mainly comprise two types, namely a peak holding type current waveform without peak current and a peak holding type current waveform with peak current. Because the current waveform of the injector solenoid valve is formed by a plurality of sections of complex currents formed under the action of a plurality of voltage sources, generally speaking, an electric control system is a driving circuit developed for the current waveform of the injector solenoid valve in a certain specific form, and if the current waveform of the injector solenoid valve needs to be changed, the electric control system needs to be re-developed frequently to meet the driving requirements of different current waveforms, so that resources are wasted, and the universality is poor.
Disclosure of Invention
The invention provides a solenoid valve driving control method, which aims to achieve the purpose that a solenoid valve driving control device can output two solenoid valve driving currents with different waveforms.
The embodiment of the invention provides a driving control method of an electromagnetic valve, which comprises the following steps:
receiving a first electromagnetic valve driving current waveform output signal, controlling to be in a first driving current output mode, and acquiring a first current maintaining threshold;
collecting an electromagnetic valve driving current, generating a first electromagnetic valve driving current source turn-off signal when the electromagnetic valve driving current is greater than a first current maintaining threshold value, and generating a first electromagnetic valve driving current source turn-on signal when the electromagnetic valve driving current is less than the first current maintaining threshold value;
when receiving a second electromagnetic valve driving current waveform output signal, controlling to be in a second driving current output mode to obtain a peak current threshold value and a second current maintaining threshold value;
collecting electromagnetic valve driving current, generating a second electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the peak current threshold, generating a first electromagnetic valve driving current source connection signal when the electromagnetic valve driving current is smaller than the second current maintaining threshold, and generating a first electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the second current maintaining threshold.
Optionally, when the control is placed in the first driving current output mode, the method further includes obtaining a third current maintenance threshold;
collecting a first-order first solenoid valve driving current output signal, generating a first solenoid valve driving current source turn-off signal when the solenoid valve driving current is greater than a first current maintaining threshold, and generating a first solenoid valve driving current source turn-on signal when the solenoid valve driving current is less than the first current maintaining threshold;
when a second-order first electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is larger than a second current maintaining threshold value, a first electromagnetic valve driving current source turn-off signal is generated, and when the electromagnetic valve driving current is smaller than the second current maintaining threshold value, a first electromagnetic valve driving current source turn-on signal is generated.
Optionally, when the control is placed in the second driving current output mode, the method further includes obtaining a fourth current maintenance threshold;
when a first-order second electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is larger than the peak current threshold, a second electromagnetic valve driving current source disconnection signal is generated, when the electromagnetic valve driving current is smaller than the second current maintaining threshold, a first electromagnetic valve driving current source connection signal is generated, and when the electromagnetic valve driving current is larger than the second current maintaining threshold, a first electromagnetic valve driving current source disconnection signal is generated;
when a second-order second solenoid valve driving current output signal is received, solenoid valve driving current is collected, when the solenoid valve driving current is smaller than a fourth current maintaining threshold value, a first solenoid valve driving current source on signal is generated, and when the solenoid valve driving current is larger than the fourth current maintaining threshold value, a first solenoid valve driving current source off signal is generated.
Optionally, when the control is placed in the first driving current output mode or the second driving current output mode, the method further includes:
and generating a low-end conduction signal of the electromagnetic valve.
Optionally, an electromagnetic valve driving voltage is generated according to the electromagnetic valve driving current, and a first voltage maintaining threshold is generated according to the first current maintaining threshold;
and judging whether the electromagnetic valve driving current is greater than a first current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the first voltage maintaining threshold value.
Optionally, an electromagnetic valve driving voltage is generated according to the electromagnetic valve driving current, a peak voltage threshold is generated according to a peak current threshold, and a second voltage maintaining threshold is generated according to a second current maintaining threshold;
judging whether the electromagnetic valve driving current is larger than the peak current threshold value or not by adopting the electromagnetic valve driving voltage and the peak voltage threshold value;
and judging whether the electromagnetic valve driving current is greater than the second current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the second voltage maintaining threshold value.
Optionally, obtaining an oil injection pulse width control signal, where the oil injection pulse width control signal is used to determine a period of the first solenoid driving current or the second solenoid driving current.
Optionally, the oil injection pulse width control signal is a square wave signal.
Optionally, the first solenoid valve driving current source disconnection signal, the first solenoid valve driving current source conduction signal, the second solenoid valve driving current source conduction signal, and the second solenoid valve driving current source disconnection signal are voltage type control signals.
Optionally, the low-end conduction signal of the electromagnetic valve is a voltage-type control signal.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a solenoid valve driving control method, which can enable a solenoid valve driving control device to output two solenoid valve driving currents with different waveforms, and when the types of applied solenoid valves are different and the waveforms of the driving currents required by the solenoid valves are different, the solenoid valve driving control device does not need to be redesigned, so that the development cost of a solenoid valve control system can be saved.
Drawings
FIG. 1 is a flowchart of a solenoid valve drive control method in the embodiment;
FIG. 2 is a schematic diagram showing a first solenoid valve driving current waveform in the embodiment;
FIG. 3 is a schematic diagram of a second solenoid drive current waveform in the embodiment;
FIG. 4 is a schematic view of a solenoid valve drive control device in the embodiment;
FIG. 5 is a flowchart of another solenoid valve driving control method in the embodiment;
FIG. 6 is a schematic diagram of a driving current waveform of a first solenoid valve in another embodiment;
FIG. 7 is a flowchart of another solenoid valve driving control method in the embodiment;
FIG. 8 is a schematic diagram of a driving current waveform of a second solenoid valve in the embodiment;
FIG. 9 is a flowchart of a solenoid valve driving control method according to still another embodiment;
FIG. 10 is a schematic view of another solenoid valve drive control apparatus in the embodiment;
FIG. 11 is a timing chart of a first solenoid-operated valve driving current in the embodiment;
FIG. 12 is a timing chart of a second solenoid-valve drive current in the embodiment;
FIG. 13 is a schematic view of a drive control device for a solenoid valve according to still another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Fig. 1 is a flowchart of a solenoid valve driving control method in an embodiment, and referring to fig. 1, the present embodiment proposes a solenoid valve driving control method suitable for a scenario of driving control of a solenoid valve in a high-pressure common rail electronically controlled injection system, which may be executed by a solenoid valve driving control apparatus, and the method includes:
s101, receiving a first electromagnetic valve driving current waveform output signal, controlling to be in a first driving current output mode, and outputting a first electromagnetic valve driving current.
And S102, receiving a second electromagnetic valve driving current waveform output signal, controlling to be in a second driving current output mode, and outputting a second electromagnetic valve driving current.
For example, in this embodiment, the solenoid valve drive control device may output two types of drive currents having different waveforms based on the solenoid valve drive control method.
For example, in the present embodiment, the form of the driving current waveform is not particularly limited, and for convenience of description, the first solenoid driving current waveform is set as shown in fig. 2, and the current shown in fig. 2 is a peak hold type current without a peak;
the second solenoid drive current waveform is set as shown in fig. 3, and the current shown in fig. 3 is a peak hold type current with a spike.
Fig. 4 is a schematic diagram of a solenoid valve driving control device in an embodiment, and referring to fig. 4, the solenoid valve driving control device may include a controller 100, a first solenoid valve driving current source 201, a first switching unit 202, a second solenoid valve driving current source 203, a second switching unit 204, and a current sampling unit 300 as an implementation.
Referring to fig. 4, a first solenoid driving current source 201 is connected to the high side of a solenoid 400 through a first switching unit 202, a second solenoid driving current source 203 is connected to the high side of the solenoid 400 through a second switching unit 204, and the low side of the solenoid 400 is grounded;
the controller 100 is respectively connected to the first switch unit 202, the second switch unit 204, and the current sampling unit 300, wherein the current sampling unit 300 is used for collecting the solenoid driving current passing through the solenoid 400.
Referring to step S101, in conjunction with fig. 4, in this embodiment, the controller 100 may be configured to receive the first solenoid driving current waveform output signal, and at this time, the controller 100 places the solenoid driving control device in the first driving current output mode.
In the first driving current output mode, the controller 100 controls the second switching unit 204 to be continuously turned off, and the first solenoid driving current source 201 is used to provide the solenoid driving current for the solenoid 400.
When in the first driving current output mode, the controller 100 determines whether the solenoid driving current is greater than a first current maintaining threshold;
when the solenoid driving current is greater than the first current maintaining threshold, the controller 100 generates a first solenoid driving current source off signal, where the first solenoid driving current source off signal is used to control the first switching unit 202 to be turned off;
when the solenoid driving current is smaller than the first current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal, where the first solenoid driving current source turn-on signal is used to control the first switch unit 202 to turn on.
Referring to fig. 2, in the present embodiment, the first current maintenance threshold may be a corresponding average value of a sawtooth wave, and the controller 100 controls the magnitude of the solenoid driving current passing through the solenoid 400 by controlling the turning-on and turning-off of the first switching unit 202 such that the average value of the solenoid driving current is the same as the first current maintenance threshold.
Specifically, when the first switching unit 202 is turned on, the solenoid driving current passing through the solenoid valve 400 gradually rises (corresponding to a rising phase of the sawtooth wave), and when the solenoid driving current is larger than the first current maintaining threshold, the first switching unit 202 is turned off, and at this time, the solenoid driving current passing through the solenoid valve 400 gradually falls (corresponding to a falling phase of the sawtooth wave), and the average value of the solenoid driving current can be stabilized at the first current maintaining threshold by periodically controlling the rising and falling of the solenoid driving current.
With respect to step S102, the controller 100 is configured to receive the second solenoid driving current waveform output signal, at which time the controller 100 places the solenoid driving control device in the second driving current output mode.
When the output mode is the second driving current output mode, the controller 100 determines whether the driving current of the solenoid valve is greater than the peak current threshold;
when the solenoid valve driving current is greater than the peak current threshold, the controller 100 generates a second solenoid valve driving current source off signal, where the second solenoid valve driving current source off signal is used to control the second switching unit 204 to be turned off;
after the second switching unit 204 is turned off, the controller 100 determines whether the solenoid driving current is greater than a second current maintaining threshold;
when the solenoid driving current is less than the second current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal;
when the solenoid driving current is greater than the second current maintaining threshold, the controller 100 generates a first solenoid driving current source off signal.
Referring to fig. 3, in this embodiment, the peak current threshold corresponds to a peak current value of the sawtooth wave starting position, the second current maintaining threshold corresponds to an average value corresponding to the remaining sawtooth wave portions after the second current maintaining threshold decreases from the peak current value.
In this embodiment, a second solenoid driving current is output, a solenoid driving current is first provided to the solenoid 400 through the second solenoid driving current source 203, at this time, the first switch unit 202 is kept turned off, after the solenoid driving current reaches the peak current threshold, a solenoid driving current is provided to the solenoid 400 through the first solenoid driving current source 201, and at this time, the second switch unit 204 is kept turned off.
The embodiment provides an electromagnetic valve driving control method, based on which an electromagnetic valve driving control device can output two electromagnetic valve driving currents with different waveforms, and when the types of applied electromagnetic valves are different and the waveforms of the driving currents required by the electromagnetic valves are different, the electromagnetic valve driving control device does not need to be redesigned, so that the development cost of an electromagnetic valve control system can be saved.
Fig. 5 is a flow chart of another solenoid valve driving control method in the embodiment, and in one possible embodiment, the control method may further include:
s1011, receiving a first electromagnetic valve driving current waveform output signal, and controlling to be in a first driving current output mode.
Fig. 6 is a schematic diagram of another waveform of the first solenoid driving current in the embodiment, and referring to fig. 6, as an implementation manner, in the present embodiment, the first solenoid driving current includes a first-stage first solenoid driving current and a second-stage first solenoid driving current.
Referring to fig. 6, in the present embodiment, the first-stage solenoid driving current and the second-stage solenoid driving current are peak-hold currents without peaks.
Referring to fig. 6, the first-stage solenoid driving current corresponds to a first current maintaining threshold, the second-stage solenoid driving current corresponds to a third current maintaining threshold, and the first current maintaining threshold is greater than the third current maintaining threshold.
In the scheme, when the first electromagnetic valve driving current is output, switching of the first electromagnetic valve driving current in the first stage and the first electromagnetic valve driving current in the second stage is involved.
S1012, outputting a first stage first electromagnetic valve driving current when receiving a first stage first electromagnetic valve driving current output signal.
With reference to fig. 4, in this embodiment, when the controller 100 receives the first-order first electromagnetic valve driving current output signal, the controller 100 determines whether the electromagnetic valve driving current is greater than the first current maintaining threshold;
when the solenoid driving current is greater than the first current maintaining threshold, the controller 100 generates a first solenoid driving current source off signal;
when the solenoid driving current is less than the first current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal.
And S1013, outputting the driving current of the first electromagnetic valve in the two stages when receiving the output signal of the driving current of the first electromagnetic valve in the two stages.
When the controller 100 receives the second-order first solenoid valve driving current output signal, the controller 100 determines whether the solenoid valve driving current is greater than a third current maintaining threshold;
when the solenoid driving current is greater than the third current maintenance threshold, the controller 100 generates a first solenoid driving current source turn-off signal;
when the solenoid driving current is less than the third current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal.
In this scheme, when the first solenoid valve driving current is output, the second switching unit 204 is continuously turned off, the first switching unit 202 is kept turned off in the process of switching from outputting the first-order first solenoid valve driving current to outputting the second-order first solenoid valve driving current, at this time, the solenoid valve driving current continuously decreases, and when the solenoid valve driving current decreases to be smaller than the third current maintaining threshold, the average value of the solenoid valve driving current is stabilized at the third current maintaining threshold by periodically controlling the increase and decrease of the solenoid valve driving current based on the first switching unit 202.
And S102, receiving a second electromagnetic valve driving current waveform output signal, controlling to be in a second driving current output mode, and outputting a second driving current.
Fig. 7 is a flowchart of another solenoid valve driving control method in the embodiment, and referring to fig. 7, as an implementation, the control method may further be:
s101, receiving a first electromagnetic valve driving current waveform output signal, controlling to be in a first driving current output mode, and outputting a first electromagnetic valve driving current.
And S1021, receiving a second electromagnetic valve driving current waveform output signal, and controlling to be in a second driving current output mode.
Fig. 8 is a schematic diagram of another second solenoid driving current waveform in the embodiment, and referring to fig. 8, as an implementation manner, the second solenoid driving current in the present embodiment includes a first-stage second solenoid driving current and a second-stage second solenoid driving current.
Referring to fig. 8, in this embodiment, the first-stage second solenoid driving current is a peak-hold current with a peak, and the second-stage second solenoid driving current is a peak-hold current without a peak.
Referring to fig. 8, the first stage second solenoid driving current corresponds to a second current maintaining threshold, the second stage second solenoid driving current corresponds to a fourth current maintaining threshold, and the second current maintaining threshold is greater than the fourth current maintaining threshold.
S1022, outputting the first stage second electromagnetic valve driving current when receiving the first stage second electromagnetic valve driving current output signal.
With reference to fig. 4, in this embodiment, when the controller 100 receives the first-order second electromagnetic valve driving current output signal, the controller 100 determines whether the electromagnetic valve driving current is greater than the peak current threshold;
when the solenoid valve driving current is greater than the peak current threshold, the controller 100 generates a second solenoid valve driving current source off signal, where the second solenoid valve driving current source off signal is used to control the second switching unit 204 to be turned off;
after the second switching unit 204 is turned off, the controller 100 determines whether the solenoid driving current is greater than a second current maintaining threshold;
when the solenoid driving current is less than the second current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal;
when the solenoid driving current is greater than the second current maintenance threshold, the controller 100 generates a first solenoid driving current source off signal.
And S1023, outputting the driving current of the second electromagnetic valve in the second stage when receiving the output signal of the driving current of the second electromagnetic valve in the second stage.
When the controller 100 receives the second-order second solenoid valve driving current output signal, the controller 100 determines whether the solenoid valve driving current is greater than a fourth current maintaining threshold;
when the solenoid driving current is greater than the fourth current maintaining threshold, the controller 100 generates a first solenoid driving current source off signal;
when the solenoid driving current is less than the fourth current maintaining threshold, the controller 100 generates a first solenoid driving current source turn-on signal.
Fig. 9 is a flowchart of another solenoid valve driving control method in the embodiment, and referring to fig. 9, as an implementation manner, the control method may further be:
s1011, receiving a first electromagnetic valve driving current waveform output signal, and controlling to be in a first driving current output mode.
S1012, outputting a first stage first electromagnetic valve driving current when receiving a first stage first electromagnetic valve driving current output signal.
And S1013, outputting the driving current of the first electromagnetic valve in the second stage when receiving the output signal of the driving current of the first electromagnetic valve in the second stage.
And S1021, receiving a second electromagnetic valve driving current waveform output signal, and controlling to be in a second driving current output mode.
S1022, outputting the first stage second electromagnetic valve driving current when receiving the first stage second electromagnetic valve driving current output signal.
And S1023, outputting the driving current of the second electromagnetic valve in the second stage when receiving the output signal of the driving current of the second electromagnetic valve in the second stage.
Fig. 10 is a schematic view of another solenoid valve driving control device in an example, and referring to fig. 10, as an embodiment, the driving control device may include:
the current state control module 101, the current modulation module 102, the first solenoid valve driving current source 201, the first switch tube 2021, the second solenoid valve driving current source 203, the second switch tube 2041, the third switch tube 205, the current sampling module 301, the first voltage comparison module 501, the second voltage comparison module 502, and the voltage threshold switching module 103.
The first solenoid valve driving current source 201 is connected to the high side of the solenoid valve 400 through a first switching tube 2021, the second solenoid valve driving current source 203 is connected to the high side of the solenoid valve 400 through a second switching tube 2041, and the low side of the solenoid valve 400 is grounded through a third switching tube 205.
The current modulation module 102 is connected to the control ends of the first switch tube 2021, the second switch tube 2041, and the third switch tube 205, respectively.
The current configuration control module 101 is respectively connected to the current modulation module 102, the first voltage comparison module 501, and the second voltage comparison module 502.
The input end of the current sampling module 301 is connected to two ends of the current sampling resistor R1, the output end of the current sampling module 301 is connected to the first input ends of the first voltage comparing module 501 and the second voltage comparing module 502, and the output end of the voltage threshold switching module 103 is connected to the second input ends of the first voltage comparing module 501 and the second voltage comparing module 502, respectively.
With reference to fig. 9 and 10, in this embodiment, the current configuration control module 101 is configured to receive a first solenoid driving current waveform output signal and a second solenoid driving current waveform output signal;
the current modulation module 102 is configured to receive a first-stage first solenoid valve driving current output signal, a second-stage first solenoid valve driving current output signal, a first-stage second solenoid valve driving current output signal, a second-stage second solenoid valve driving current output signal, and an oil injection pulse width control signal;
configuring an oil injection pulse width control signal for determining the period of the first electromagnetic valve driving current or the second electromagnetic valve driving current;
the configuration current modulation module 102 outputs a first solenoid valve driving current source off signal, a first solenoid valve driving current source on signal, a second solenoid valve driving current source off signal, a solenoid valve low end on signal, and a solenoid valve low end off signal;
the voltage threshold switching module 103 is configured to receive a first solenoid valve driving current waveform output signal, a second solenoid valve driving current waveform output signal, a first stage first solenoid valve driving current output signal, a second stage first solenoid valve driving current output signal, a first stage second solenoid valve driving current output signal, and a second stage second solenoid valve driving current output signal;
configuring the voltage threshold switching module 103 to store a first voltage maintaining threshold, a second voltage maintaining threshold, a third voltage maintaining threshold, a fourth voltage maintaining threshold, and a peak voltage threshold;
the current sampling module 301 is configured to generate a solenoid valve driving voltage based on a solenoid valve driving current through the current sampling resistor R1;
a first voltage comparison module 501 is configured to compare the driving voltage of the solenoid valve with a first voltage maintenance threshold, or compare the driving voltage of the solenoid valve with a peak voltage threshold;
the second voltage comparison module 502 is configured to compare the solenoid driving voltage with a second voltage maintaining threshold, or compare the solenoid driving voltage with a third voltage maintaining threshold, or compare the solenoid driving voltage with a fourth voltage maintaining threshold.
Exemplarily, in the present solution, the first solenoid valve driving current source off signal, the first solenoid valve driving current source on signal, the second solenoid valve driving current source on signal, and the second solenoid valve driving current source off signal are voltage type control signals;
the first electromagnetic valve driving current source turn-off signal and the first electromagnetic valve driving current source turn-on signal are respectively used for controlling the turn-off and turn-on of the first switch tube 2021; the second electromagnetic valve driving current source conducting signal and the second electromagnetic valve driving current source disconnecting signal are respectively used for controlling the second switching tube 2041 to be conducted and disconnected;
the solenoid valve low-end on signal and the solenoid valve low-end off signal are voltage type control signals, and the solenoid valve low-end on signal and the solenoid valve low-end off signal are respectively used for controlling the third switching tube 205 to be turned on and off.
For example, in this embodiment, MOS transistors may be used as the first switching tube 2021, the second switching tube 2041, and the third switching tube 205.
In this embodiment, for example, in addition to the embodiments described in fig. 5 and 7, the first voltage maintaining threshold, the second voltage maintaining threshold, the third voltage maintaining threshold, and the fourth voltage maintaining threshold correspond to the first current maintaining threshold, the second current maintaining threshold, the third current maintaining threshold, and the fourth current maintaining threshold, respectively.
Fig. 11 is a timing chart of a first solenoid driving current in the embodiment, and in conjunction with fig. 9, 10 and 11, the operation of the solenoid driving control device includes:
the current form control module 101 receives a first electromagnetic valve driving current waveform output signal, and the electromagnetic valve driving control device is arranged in a first driving current output mode;
when the voltage threshold switching module 103 receives the first solenoid valve driving current waveform output signal, the output terminal Vref1 outputs a first voltage maintaining threshold, and the output terminal Vref2 outputs a third voltage maintaining threshold;
when the oil injection pulse width control signal is at a rising edge and the current modulation module 102 receives a first-stage electromagnetic valve driving current output signal;
the current modulation module 102 controls the first switch tube 2021 to be turned on, the second switch tube 2041 to be turned off, and the third switch tube 205 to be turned on, and at this time, the current is driven to rise by the electromagnetic valve of the electromagnetic valve 400 (corresponding to stage T1);
when the driving voltage of the solenoid valve is greater than the first voltage maintaining threshold, the first voltage comparing module 501 outputs a low level control signal, at this time, the current modulating module 102 controls the first switching tube 2021 to turn off, the driving current of the solenoid valve decreases, when the driving voltage of the solenoid valve is less than the first voltage maintaining threshold, the first voltage comparing module 501 outputs a high level control signal, at this time, the current modulating module 102 controls the first switching tube 2021 to turn on, and the driving current of the solenoid valve increases (corresponding to a stage T2);
when the current modulation module 102 receives the output signal of the driving current of the first electromagnetic valve in the second stage, the current modulation module 102 controls the first switch tube 2021 to be turned off, and the driving current of the electromagnetic valve is decreased (corresponding to the stage T3);
when the driving voltage of the solenoid valve is smaller than the third voltage maintaining threshold, the second voltage comparing module 502 outputs a high level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned on, the driving current of the solenoid valve rises, when the driving voltage of the solenoid valve is larger than the third voltage maintaining threshold, the second voltage comparing module 502 outputs a low level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned off, and the driving current of the solenoid valve falls (corresponding to the stage T4);
when the injection pulse width control signal is at a falling edge, the current modulation module 102 controls the second switching tube 2041 to be turned off and the third switching tube 205 to be turned off, so that the solenoid valve driving current falls (the solenoid valve driving current is discharged through the diode D1 and the diode D3, corresponding to a stage T5).
Fig. 12 is a timing chart of a second solenoid driving current in the embodiment, and with reference to fig. 9, 10 and 12, the operation process of the solenoid driving control device further includes:
the current form control module 101 receives a second electromagnetic valve driving current waveform output signal, and the electromagnetic valve driving control device is arranged in a second driving current output mode;
when the voltage threshold switching module 103 receives the second solenoid valve driving current waveform output signal, the output terminal Vref1 outputs the peak voltage threshold, and the output terminal Vref2 outputs the second voltage maintaining threshold;
when the oil injection pulse width control signal is on the rising edge and the current modulation module 102 receives the first-stage second electromagnetic valve driving current output signal;
the current modulation module 102 controls the first switch tube 2021 to be turned on, the second switch tube 2041 to be turned off, and the third switch tube 205 to be turned on, and at this time, the current is driven to rise by the electromagnetic valve of the electromagnetic valve 400 (corresponding to the stage T1);
when the driving voltage of the solenoid valve is greater than the peak voltage threshold, the first voltage comparison module 501 outputs a low level control signal, and at this time, the current modulation module 102 controls the first switch tube 2021 to be turned off, so that the driving current of the solenoid valve decreases;
when the driving voltage of the electromagnetic valve is smaller than the second voltage maintaining threshold, the second voltage comparing module 502 outputs a high level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned on, the driving current of the electromagnetic valve rises, when the driving voltage of the electromagnetic valve is greater than the second voltage maintaining threshold, the second voltage comparing module 502 outputs a low level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned off, and the driving current of the electromagnetic valve falls (corresponding to stage T2);
when the voltage threshold switching module 103 receives the second-stage solenoid valve driving current output signal, the output terminal Vref2 of the voltage threshold switching module 103 outputs a fourth voltage maintaining threshold;
when the current modulation module 102 receives the second-stage output signal of the driving current of the second solenoid valve, the current modulation module 102 controls the second switch tube 2021 to be turned off, and the driving current of the solenoid valve decreases (corresponding to the stage T3);
when the driving voltage of the electromagnetic valve is smaller than the fourth voltage maintaining threshold, the second voltage comparing module 502 outputs a high level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned on, the driving current of the electromagnetic valve rises, when the driving voltage of the electromagnetic valve is greater than the fourth voltage maintaining threshold, the second voltage comparing module 502 outputs a low level control signal, at this time, the current modulating module 102 controls the second switching tube 2041 to be turned off, and the driving current of the electromagnetic valve falls (corresponding to stage T4);
when the oil injection pulse width control signal is at a falling edge, the current modulation module 102 controls the second switching tube 2041 to be disconnected, the third switching tube 205 to be disconnected, and the electromagnetic valve driving current falls (corresponding to a stage T5).
On the basis of the beneficial effects of the scheme shown in fig. 1, in the scheme, the driving control method can be used for controlling and outputting the electromagnetic valve driving current with a complex waveform, and specifically, when the driving current with the first form is output, the on-line switching of the current waveform under the form can be realized based on the electromagnetic valve driving voltage, the first voltage maintaining threshold and the third voltage maintaining threshold; when the driving current of the second form is output, the on-line switching of the current waveform in the form can be realized based on the peak voltage threshold, the solenoid valve driving voltage, the second voltage maintaining threshold and the fourth voltage maintaining threshold.
Fig. 13 is a schematic diagram of a solenoid valve driving control Device in an embodiment, and as an implementation scheme, based on the scheme shown in fig. 10, the current form control module 101 and the current modulation module 102 may be designed as function modules in a CPLD (Complex Programmable Logic Device).
For example, in this embodiment, the first solenoid driving current source may be a high voltage source, and the second solenoid driving current source may be a battery.
Referring to fig. 13, the current configuration control module 101 may specifically include a first alternative selector 1011 and a first D flip-flop 1012.
The signal input end of the first alternative selector 1011 is used for receiving a high voltage indicating signal, and the first D flip-flop outputs an inverted signal; the signal selection terminal of the first alternative selector 1011 is configured to receive a current waveform selection signal; the output signal of the first alternative selector 1011 serves as a high-voltage open signal source;
the input of the first D flip-flop 1012 is a high voltage indication inverted signal and the output is a first D flip-flop output signal.
Illustratively, the first D flip-flop output inverted signal and the first D flip-flop output signal are mutually inverted signals.
Illustratively, the high voltage indication signal is an output signal of the first voltage comparing module 501, and the high voltage indication signal and the high voltage indication inverted signal are mutually inverted signals (for example, the high voltage indication signal is 1, and the high voltage indication inverted signal is 0).
For example, the current waveform selection signal may be a square wave signal, which may serve as a first solenoid driving current waveform output signal when the current waveform selection signal is at a low level, and may serve as a second solenoid driving current waveform output signal when the current waveform selection signal is at a high level.
Referring to fig. 13, the current modulation module 102 may specifically include a second one-of-two selector 1021, a first logic gate unit 1022, a second logic gate unit 1023, and a third logic gate unit 1024.
The signal input end of the second alternative selector 1021 is used for receiving the high-voltage control inverted signal and the current stage switching inverted signal, and the signal selection end of the second alternative selector 1021 is used for receiving the current waveform selection signal.
The first logic gate unit 1022 has a high-voltage open signal source and a current stage switching signal as its inputs, and outputs a high-voltage control signal as its output.
The second logic gate unit 1023 inputs the second alternative selector output signal, the oil injection pulse width control signal, the storage battery current indication signal, and outputs the storage battery control signal.
The input of the third logic gate unit 1024 is an oil injection pulse width control signal, and the output is an electromagnetic valve low-end control signal.
For example, the current phase switching signal is a square wave signal, and when the current phase switching signal is at a high level, it may be used as the first-phase solenoid driving current output signal, and when the current phase switching signal is at a low level, it may be used as the first-phase solenoid driving current output signal.
Illustratively, the battery current indication signal is an output signal of the second voltage comparison module 502.
For example, the high voltage control signal is a square wave signal, and when the high voltage control signal is at a high level, it may be used as a first solenoid driving current source on signal, and when the high voltage control signal is at a low level, it may be used as a first solenoid driving current source off signal.
Illustratively, the high voltage control signal and the high voltage control inverted signal are inverted signals of each other.
Illustratively, the battery control signal is a square wave signal, and when the battery control signal is at a high level, the battery control signal may be used as a second solenoid valve driving current source on signal, and when the battery control signal is at a low level, the battery control signal may be used as a second solenoid valve driving current source off signal.
For example, the solenoid low-side control signal may be a square wave signal, which may be used as a solenoid low-side on signal when the solenoid low-side control signal is at a high level, and may be used as a solenoid low-side off signal when the solenoid low-side control signal is at a high level.
Referring to fig. 13, the operation of the solenoid valve drive control apparatus includes:
the third logic gate unit 1024 generates an electromagnetic valve low-end control signal according to the oil injection pulse control signal, and controls the third switching tube 205 to be turned on or off through the electromagnetic valve low-end control signal;
when the current waveform selection signal indicates that the first electromagnetic valve drives the current waveform output signal, the first alternative selector 1011 selects the high-voltage indication signal as a high-voltage open signal source;
the high-voltage open signal source is output to the first logic gate unit 1022, the first logic gate unit 1022 logically and-connects the high-voltage open signal source and the current stage switching signal to obtain a high-voltage control signal, and the first switching tube 2021 is controlled to be turned on or turned off by the high-voltage control signal;
the second one-of-two selector 1021 selects the current stage switching inverted signal as the second one-of-one selector output signal;
the second logic gate unit 1023 logically sums the output signal of the second alternative selector, the oil injection pulse width control signal and the storage battery current indication signal to obtain a storage battery control signal, and controls the second switch tube 2041 to be switched on or off through the storage battery control signal;
when the current waveform selection signal represents the second electromagnetic valve driving current waveform output signal, the first alternative selector 1011 selects the first D flip-flop to output the inverted signal as the high-voltage open signal source;
the high-voltage open signal source is output to the first logic gate unit 1022, and the first logic gate unit 1022 logically sums the high-voltage open signal source and the current stage switching signal to obtain a high-voltage control signal;
the second one-of-two selector 1021 selects the high-voltage control inverted signal as a second one-of-two selector output signal;
the second logic gate unit 1023 logically sums the output signal of the second alternative selector, the oil injection pulse width control signal and the storage battery current indication signal to obtain a storage battery control signal.
For example, in this embodiment, the injection pulse width control signal is also used as a zero clearing signal for the first D flip-flop 1012, so as to ensure that the first D flip-flop 1012 does not operate when the injection pulse width control signal is invalid (at a low level).
For example, in the scheme shown in fig. 13, a first voltage comparison module is used to compare the driving voltage of the solenoid valve, a first voltage maintenance threshold value, and a peak voltage threshold value, so as to generate a high voltage indication signal, and output control of the driving current is realized based on the high voltage indication signal; the second voltage comparison module is adopted to realize comparison of the electromagnetic valve driving voltage, the second voltage maintaining threshold, the third voltage maintaining threshold and the fourth voltage maintaining threshold, so that a storage battery current indicating signal is generated, output control of the driving current is realized based on the storage battery current indicating signal, the control signals are few, and the control logic is clear.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A solenoid valve drive control method characterized by comprising:
receiving a first electromagnetic valve driving current waveform output signal, controlling to be in a first driving current output mode, and acquiring a first current maintaining threshold;
collecting electromagnetic valve driving current, generating a first electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is greater than the first current maintaining threshold, and generating a first electromagnetic valve driving current source connection signal when the electromagnetic valve driving current is less than the first current maintaining threshold;
when receiving a second electromagnetic valve driving current waveform output signal, controlling to be in a second driving current output mode, and acquiring a peak current threshold and a second current maintenance threshold;
collecting electromagnetic valve driving current, generating a second electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the peak current threshold, generating a first electromagnetic valve driving current source connection signal when the electromagnetic valve driving current is smaller than the second current maintaining threshold, and generating a first electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the second current maintaining threshold.
2. The drive control method of the electromagnetic valve according to claim 1, characterized in that controlling to be placed in the first drive current output mode further comprises obtaining a third current maintenance threshold;
when a first-order first electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is larger than a first current maintaining threshold value, a first electromagnetic valve driving current source turn-off signal is generated, and when the electromagnetic valve driving current is smaller than the first current maintaining threshold value, a first electromagnetic valve driving current source turn-on signal is generated;
when a second-order first electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is larger than a second current maintaining threshold value, a first electromagnetic valve driving current source turn-off signal is generated, and when the electromagnetic valve driving current is smaller than the second current maintaining threshold value, a first electromagnetic valve driving current source turn-on signal is generated.
3. The drive control method of a solenoid valve according to claim 1, wherein controlling to be placed in the second drive current output mode further comprises, acquiring a fourth current maintenance threshold;
when a first-order second electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is larger than the peak current threshold, a second electromagnetic valve driving current source disconnection signal is generated, when the electromagnetic valve driving current is smaller than the second current maintaining threshold, a first electromagnetic valve driving current source connection signal is generated, and when the electromagnetic valve driving current is larger than the second current maintaining threshold, a first electromagnetic valve driving current source disconnection signal is generated;
when a second-order second electromagnetic valve driving current output signal is received, electromagnetic valve driving current is collected, when the electromagnetic valve driving current is smaller than a fourth current maintaining threshold value, a first electromagnetic valve driving current source conducting signal is generated, and when the electromagnetic valve driving current is larger than the fourth current maintaining threshold value, a first electromagnetic valve driving current source disconnecting signal is generated.
4. The drive control method of the electromagnetic valve according to claim 1, characterized in that controlling to be placed in the first drive current output mode or the second drive current output mode further comprises:
and generating a low-end conduction signal of the electromagnetic valve.
5. The solenoid valve drive control method according to claim 1, characterized in that a solenoid valve drive voltage is generated in accordance with the solenoid valve drive current, a first voltage maintenance threshold is generated in accordance with the first current maintenance threshold;
and judging whether the electromagnetic valve driving current is greater than a first current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the first voltage maintaining threshold value.
6. The solenoid valve drive control method according to claim 1, characterized in that a solenoid valve drive voltage is generated based on the solenoid valve drive current, a spike voltage threshold is generated based on a spike current threshold, and a second voltage maintenance threshold is generated based on a second current maintenance threshold;
judging whether the electromagnetic valve driving current is larger than the peak current threshold value or not by adopting the electromagnetic valve driving voltage and the peak voltage threshold value;
and judging whether the electromagnetic valve driving current is greater than the second current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the second voltage maintaining threshold value.
7. The solenoid drive control method of claim 1, further comprising obtaining a fuel injection pulsewidth control signal for determining a period of the first solenoid drive current or the second solenoid drive current.
8. The drive control method of a solenoid valve according to claim 7, wherein said fuel injection pulse width control signal is a square wave signal.
9. The solenoid drive control method according to claim 1, wherein the first solenoid-driving current-source off signal, the first solenoid-driving current-source on signal, the second solenoid-driving current-source on signal, and the second solenoid-driving current-source off signal are voltage-type control signals.
10. The drive control method of the solenoid valve according to claim 4, wherein the solenoid valve low-side conduction signal is a voltage-type control signal.
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| CN114704411B (en) | 2023-06-06 |
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