CN114704411B - Electromagnetic valve driving control method - Google Patents
Electromagnetic valve driving control method Download PDFInfo
- Publication number
- CN114704411B CN114704411B CN202210395188.9A CN202210395188A CN114704411B CN 114704411 B CN114704411 B CN 114704411B CN 202210395188 A CN202210395188 A CN 202210395188A CN 114704411 B CN114704411 B CN 114704411B
- Authority
- CN
- China
- Prior art keywords
- driving current
- current
- valve driving
- solenoid valve
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a driving control method of an electromagnetic valve, which comprises the following steps: receiving a first electromagnetic valve driving current waveform output signal, and acquiring a first current maintenance threshold value; collecting solenoid valve driving current, generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than a first current maintenance threshold value, and generating a first solenoid valve driving current source conduction signal when the solenoid valve driving current is smaller than the first current maintenance threshold value; when receiving a second electromagnetic valve driving current waveform output signal, acquiring a peak current threshold value and a second current maintenance threshold value; and collecting solenoid valve driving current, generating a second solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than a peak current threshold value, generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than a second current maintenance threshold value, and generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the second current maintenance threshold value.
Description
Technical Field
The embodiment of the invention relates to an engine control technology, in particular to a solenoid valve driving control method.
Background
In a high-pressure common rail injection system of a diesel engine, in order to accurately control the injection quantity of the engine, the response time and electromagnetic force of an electromagnetic valve of an injector are strictly required, and the key factor influencing the performance of the electromagnetic valve is the current waveform applied to a solenoid valve coil, so that in an injection control system, the current waveform of the injector needs to be strictly controlled to achieve the optimal performance of the injector.
In the debugging process of the fuel injector, a large amount of test verification is needed, and the current waveforms of the fuel injector which are needed by the fuel injector face solenoid valve coils with different types of parameters are different, wherein the common driving current waveforms of the fuel injector solenoid valve mainly comprise a peak-hold current waveform without peak current and a peak-hold current waveform with peak current. Because the current waveform of the electromagnetic valve of the fuel injector is formed by a plurality of sections of complex currents formed under the action of a plurality of voltage sources, in general, the electric control system is a driving circuit developed for the current waveform of the electromagnetic valve of the fuel injector in a specific form, if the current waveform of the electromagnetic valve of the fuel injector needs to be changed, the electric control system is often required to be redeveloped so as to meet the driving requirements of different current waveforms, not only resources are wasted, but also the universality is poor.
Disclosure of Invention
The invention provides a solenoid valve driving control method, which aims to enable a solenoid valve driving control device to output solenoid valve driving currents with two different waveforms.
The embodiment of the invention provides a solenoid valve driving control method, which comprises the following steps:
receiving a first electromagnetic valve driving current waveform output signal, controlling the first electromagnetic valve driving current waveform output signal to be placed in a first driving current output mode, and obtaining a first current maintenance threshold;
collecting electromagnetic valve driving current, generating a first electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the first current maintenance threshold value, and generating a first electromagnetic valve driving current source connection signal when the electromagnetic valve driving current is smaller than the first current maintenance threshold value;
when receiving a second electromagnetic valve driving current waveform output signal, controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode, and acquiring a peak current threshold value and a second current maintenance threshold value;
and collecting solenoid valve driving current, generating a second solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the peak current threshold value, generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the second current maintenance threshold value, and generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the second current maintenance threshold value.
Optionally, the controlling is further included when the first driving current output mode is set, and a third current maintenance threshold is obtained;
collecting solenoid valve driving current when receiving a first-order first solenoid valve driving current output signal, generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the first current maintenance threshold value, and generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the first current maintenance threshold value;
and when receiving a second-order first electromagnetic valve driving current output signal, collecting electromagnetic valve driving current, when the electromagnetic valve driving current is larger than the third current maintenance threshold value, generating a first electromagnetic valve driving current source disconnection signal, and when the electromagnetic valve driving current is smaller than the third current maintenance threshold value, generating a first electromagnetic valve driving current source connection signal.
Optionally, the controlling is further included when the second driving current output mode is set, and a fourth current maintenance threshold is obtained;
collecting solenoid valve driving current when receiving a first-order second solenoid valve driving current output signal, generating a second solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the peak current threshold value, generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the second current maintenance threshold value, and generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the second current maintenance threshold value;
and when receiving a second-order second electromagnetic valve driving current output signal, collecting electromagnetic valve driving current, when the electromagnetic valve driving current is smaller than the fourth current maintenance threshold value, generating a first electromagnetic valve driving current source on signal, and when the electromagnetic valve driving current is larger than the fourth current maintenance threshold value, generating a first electromagnetic valve driving current source off signal.
Optionally, the controlling when placed in the first driving current output mode or the second driving current output mode further includes:
generating a low-end conduction signal of the electromagnetic valve.
Optionally, generating a solenoid valve driving voltage according to the solenoid valve driving current, and generating a first voltage maintaining threshold according to the first current maintaining threshold;
and judging whether the electromagnetic valve driving current is larger than the first current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the first voltage maintaining threshold value.
Optionally, generating a solenoid valve driving voltage according to the solenoid valve driving current, generating a spike voltage threshold according to a spike current threshold, and generating a second voltage maintenance threshold according to 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 larger than the second current maintaining threshold value or not by adopting the electromagnetic valve driving voltage and the second voltage maintaining threshold value.
Optionally, the method further comprises the step of acquiring an oil injection pulse width control signal, wherein the oil injection pulse width control signal is used for determining the period of the first electromagnetic valve driving current or the second electromagnetic valve driving current.
Optionally, the fuel injection pulse width control signal is a square wave signal.
Optionally, the first electromagnetic valve driving current source disconnection signal, the first electromagnetic valve driving current source conduction signal, the second electromagnetic valve driving current source conduction signal and the second electromagnetic 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, based on the method, a solenoid valve driving control device can output solenoid valve driving currents with two different waveforms, when the types of applied solenoid valves are different, 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, and the development cost of a solenoid valve control system can be saved.
Drawings
FIG. 1 is a flow chart of a solenoid valve drive control method in an embodiment;
FIG. 2 is a schematic diagram of a first solenoid drive current waveform in an embodiment;
FIG. 3 is a schematic diagram of a second solenoid drive current waveform in an embodiment;
FIG. 4 is a schematic diagram of a solenoid valve drive control apparatus in an embodiment;
FIG. 5 is a flowchart of another solenoid valve drive control method in an embodiment;
FIG. 6 is a schematic diagram of another first solenoid drive current waveform in an embodiment;
FIG. 7 is a flowchart of another solenoid valve drive control method in an embodiment;
FIG. 8 is a schematic diagram of another second solenoid drive current waveform in an embodiment;
FIG. 9 is a flowchart of yet another solenoid valve drive control method in an embodiment;
FIG. 10 is a schematic diagram of another solenoid valve drive control apparatus in an embodiment;
FIG. 11 is a first solenoid drive current timing diagram in an embodiment;
FIG. 12 is a second solenoid drive current timing diagram in an embodiment;
fig. 13 is a schematic view of still another solenoid valve drive control apparatus in the embodiment.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a flowchart of a solenoid valve drive control method in an embodiment, and referring to fig. 1, the present embodiment proposes a solenoid valve drive control method that is suitable for a scenario for drive control of a solenoid valve in a high-pressure common rail electrically controlled injection system, the method being executable by a solenoid valve drive control apparatus, the method comprising:
s101, receiving a waveform output signal of the driving current of the first electromagnetic valve, controlling the first electromagnetic valve to be placed in a first driving current output mode, and outputting the driving current of the first electromagnetic valve.
S102, receiving a second electromagnetic valve driving current waveform output signal, controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode, and outputting second electromagnetic valve driving current.
In this embodiment, the solenoid valve drive control apparatus may output the drive currents having two different waveforms based on the solenoid valve drive control method.
In this 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 current without 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 current with a spike.
Fig. 4 is a schematic diagram of a solenoid valve driving control apparatus in an example, referring to fig. 4, as an embodiment, the solenoid valve driving control apparatus 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.
Referring to fig. 4, a first solenoid valve driving current source 201 is connected to a high side of a solenoid valve 400 through a first switching unit 202, a second solenoid valve driving current source 203 is connected to the high side of the solenoid valve 400 through a second switching unit 204, and a low side of the solenoid valve 400 is grounded;
the controller 100 is respectively connected with 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 driving current of the electromagnetic valve 400.
With respect 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, at which 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 400 with the solenoid driving current.
When in the first driving current output mode, the controller 100 determines whether the solenoid driving current is greater than a first current maintenance threshold;
when the solenoid driving current is greater than the first current maintenance threshold, the controller 100 generates a first solenoid driving current source off signal for controlling 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 on signal for controlling the first switching unit 202 to be turned on.
Referring to fig. 2, in the present embodiment, the first current maintenance threshold may be a corresponding average value of sawtooth waves, and the controller 100 controls the magnitude of the solenoid driving current through the solenoid 400 by controlling the on and off of the first switching unit 202 so 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 valve driving current through the solenoid valve 400 gradually increases (corresponds to the rising stage of the sawtooth wave), and when the solenoid valve driving current is greater than the first current maintaining threshold, the first switching unit 202 is turned off, at this time, the solenoid valve driving current through the solenoid valve 400 gradually decreases (corresponds to the falling stage of the sawtooth wave), and the average value of the solenoid valve driving current can be stabilized at the first current maintaining threshold by periodically controlling the rising and falling of the solenoid valve driving current.
For step S102, the controller 100 is configured to receive the second solenoid drive current waveform output signal, at which time the controller 100 places the solenoid drive control device in the second drive current output mode.
When in the second driving current output mode, the controller 100 determines whether the solenoid driving current is greater than the peak current threshold;
when the solenoid driving current is greater than the peak current threshold, the controller 100 generates a second solenoid driving current source off signal for controlling 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 valve driving current is greater than a second current maintenance threshold;
when the solenoid valve driving current is less than the second current maintenance threshold, the controller 100 generates a first solenoid valve driving current source 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.
Referring to fig. 3, in the present embodiment, the peak current threshold corresponds to a peak current value of a sawtooth wave start position, and the second current maintenance threshold corresponds to an average value corresponding to the rest sawtooth wave portion after the peak current value is reduced.
In this embodiment, the second solenoid driving current is output, the 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, and after the solenoid driving current reaches the peak current threshold, the solenoid driving current is provided to the solenoid 400 through the first solenoid driving current source 201, at this time, the second switch unit 204 is kept turned off.
The embodiment provides a solenoid valve driving control method, based on which a solenoid valve driving control device can output solenoid valve driving currents with two different waveforms, when the applied solenoid valves are different in type and the driving current required by the solenoid valves is different in waveform, the solenoid valve driving control device does not need to be redesigned, and the development cost of a solenoid valve control system can be saved.
Fig. 5 is a flowchart of another solenoid valve driving control method in an example, and in one embodiment, the control method may further be:
s1011, receiving a first electromagnetic valve driving current waveform output signal, and controlling to be placed 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, referring to fig. 6, in this embodiment, the first solenoid driving current includes a first solenoid driving current with one stage and a first solenoid driving current with two stages.
Referring to fig. 6, in the present embodiment, the first solenoid driving current in one stage and the first solenoid driving current in two stages are peak hold currents without peak.
Referring to fig. 6, the first solenoid driving current corresponds to a first current maintenance threshold, and the first solenoid driving current corresponds to a third current maintenance threshold, and the first current maintenance threshold is greater than the third current maintenance threshold.
In the scheme, when the first solenoid valve driving current is output, the switching of the first solenoid valve driving current at one stage and the first solenoid valve driving current output at two stages is involved.
S1012, outputting a first-stage first electromagnetic valve driving current when receiving a first-stage first electromagnetic valve driving current output signal.
Referring to fig. 4, in the present embodiment, when the controller 100 receives the first-order first solenoid driving current output signal, the controller 100 determines whether the solenoid driving current is greater than the first current maintenance threshold;
when the solenoid driving current is greater than the first current maintenance 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 on signal.
S1013, outputting the driving current of the two-stage first electromagnetic valve when receiving the driving current output signal of the two-stage first electromagnetic valve.
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 maintenance threshold;
when the solenoid driving current is greater than the third current maintenance threshold, the controller 100 generates a first solenoid driving current source 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 on signal.
In this scheme, when the first solenoid valve driving current is output, the second switching unit 204 is continuously turned off, and 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, the first switching unit 202 is kept turned off, 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 maintenance threshold value, based on the first switching unit 202, the average value of the solenoid valve driving current is stabilized at the third current maintenance threshold value by periodically controlling the rising and decreasing of the solenoid valve driving current.
S102, receiving a second electromagnetic valve driving current waveform output signal, controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode, and outputting second driving current.
Fig. 7 is a flowchart of another electromagnetic valve driving control method in the example, referring to fig. 7, as an implementation manner, the control method may further be:
s101, receiving a waveform output signal of the driving current of the first electromagnetic valve, controlling the first electromagnetic valve to be placed in a first driving current output mode, and outputting the driving current of the first electromagnetic valve.
S1021, receiving a second electromagnetic valve driving current waveform output signal, and controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode.
Fig. 8 is a schematic diagram of another waveform of the second solenoid driving current in the embodiment, referring to fig. 8, in this embodiment, the second solenoid driving current includes a first-stage second solenoid driving current and a second-stage second solenoid driving current.
Referring to fig. 8, in the present 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 maintenance threshold, and the second-stage second solenoid driving current corresponds to a fourth current maintenance threshold, and the second current maintenance threshold is greater than the fourth current maintenance threshold.
S1022, outputting a one-stage second electromagnetic valve driving current when receiving the one-stage second electromagnetic valve driving current output signal.
Referring to fig. 4, in the present embodiment, when the controller 100 receives the first-order second solenoid valve driving current output signal, the controller 100 determines whether the solenoid valve driving current is greater than the peak current threshold;
when the solenoid driving current is greater than the peak current threshold, the controller 100 generates a second solenoid driving current source off signal for controlling 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 valve driving current is greater than a second current maintenance threshold;
when the solenoid valve driving current is less than the second current maintenance threshold, the controller 100 generates a first solenoid valve driving current source 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.
S1023, outputting the driving current of the second electromagnetic valve at the two stages when receiving the driving current output signal of the second electromagnetic valve at the two stages.
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 maintenance threshold;
when the solenoid driving current is greater than the fourth current maintenance threshold, the controller 100 generates a first solenoid driving current source off signal;
when the solenoid driving current is less than the fourth current maintenance threshold, the controller 100 generates a first solenoid driving current source on signal.
Fig. 9 is a flowchart of yet another electromagnetic valve driving control method in the embodiment, 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 placed 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.
S1013, outputting the driving current of the two-stage first electromagnetic valve when receiving the driving current output signal of the two-stage first electromagnetic valve.
S1021, receiving a second electromagnetic valve driving current waveform output signal, and controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode.
S1022, outputting a one-stage second electromagnetic valve driving current when receiving the one-stage second electromagnetic valve driving current output signal.
S1023, outputting the driving current of the second electromagnetic valve at the two stages when receiving the driving current output signal of the second electromagnetic valve at the two stages.
Fig. 10 is a schematic view of another solenoid valve drive control apparatus in an example, referring to fig. 10, as an alternative embodiment, the drive control apparatus may include:
the current form control module 101, the current modulation module 102, the first solenoid valve driving current source 201, the first switching tube 2021, the second solenoid valve driving current source 203, the second switching tube 2041, the third switching 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 switching tube 2021, the second switching tube 2041, and the third switching tube 205, respectively.
The current form control module 101 is connected to the current modulation module 102, the first voltage comparison module 501, and the second voltage comparison module 502, respectively.
The input end of the current sampling module 301 is connected with two ends of the current sampling resistor R1, the output end of the current sampling module 301 is connected with 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 with the second input ends of the first voltage comparing module 501 and the second voltage comparing module 502 respectively.
Referring to fig. 9 and 10, in this embodiment, a current form 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 solenoid valve driving current output signal, a second solenoid valve driving current output signal, and a fuel 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 disconnection signal, a first solenoid valve driving current source conduction signal, a second solenoid valve driving current source disconnection signal, a solenoid valve low-end conduction signal and a solenoid valve low-end disconnection signal;
the voltage threshold switching module 103 is configured to receive the first solenoid driving current waveform output signal, the second solenoid driving current waveform output signal, the first solenoid driving current output signal of the first stage, the first solenoid driving current output signal of the second stage, the second solenoid driving current output signal of the first stage, and the second solenoid driving current output signal of the second stage;
the configuration voltage threshold switching module 103 stores a first voltage maintenance threshold, a second voltage maintenance threshold, a third voltage maintenance threshold, a fourth voltage maintenance threshold, a spike voltage threshold;
the current sampling module 301 is configured to generate a solenoid drive voltage based on a solenoid drive current through the current sampling resistor R1;
the first voltage comparison module 501 is configured to compare the solenoid driving voltage with a first voltage maintenance threshold, or the solenoid driving voltage with a spike voltage threshold;
the second voltage comparison module 502 is configured to compare the solenoid drive voltage to a second voltage maintenance threshold, or to compare the solenoid drive voltage to a third voltage maintenance threshold, or to compare the solenoid drive voltage to a fourth voltage maintenance threshold.
In the scheme, the first electromagnetic valve driving current source disconnection signal, the first electromagnetic valve driving current source conduction signal, the second electromagnetic valve driving current source conduction signal and the second electromagnetic valve driving current source disconnection signal are voltage type control signals;
the first solenoid valve driving current source off signal and the first solenoid valve driving current source on signal are respectively used for controlling the first switch tube 2021 to be turned off and on; the second electromagnetic valve driving current source on signal and the second electromagnetic valve driving current source off signal are respectively used for controlling the second switch tube 2041 to be turned on and off;
the electromagnetic valve low-end on signal and the electromagnetic valve low-end off signal are voltage type control signals, and the electromagnetic valve low-end on signal and the electromagnetic valve low-end off signal are respectively used for controlling the on and off of the third switching tube 205.
For example, in this embodiment, the first switching tube 2021, the second switching tube 2041, and the third switching tube 205 may be MOS tubes.
In this embodiment, 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, on the basis of the embodiments shown in fig. 5 and 7.
Fig. 11 is a timing chart of a first solenoid valve driving current in the embodiment, and in combination with fig. 9, 10 and 11, the operation of the solenoid valve 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 placed in a first driving current output mode;
when the voltage threshold switching module 103 receives the waveform output signal of the first electromagnetic valve driving current, the output end Vref1 outputs a first voltage maintenance threshold value, and the output end Vref2 outputs a third voltage maintenance threshold value;
when the fuel injection pulse width control signal is at the rising edge and the current modulation module 102 receives a first electromagnetic valve driving current output signal at one stage;
the current modulation module 102 controls the first switching tube 2021 to be turned on, the second switching tube 2041 to be turned off, and the third switching tube 205 to be turned on, and at this time, the solenoid driving current through the solenoid 400 rises (corresponding to the T1 phase);
when the solenoid valve driving voltage 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 be turned off, the solenoid valve driving current decreases, and when the solenoid valve driving voltage 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 be turned on, and the solenoid valve driving current increases (corresponding to the T2 stage);
when the current modulation module 102 receives the two-stage first electromagnetic valve driving current output signal, the current modulation module 102 controls the first switch tube 2021 to be turned off, and the electromagnetic valve driving current is reduced (corresponding to the T3 stage);
when the solenoid valve driving voltage 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 solenoid valve driving current rises, when the solenoid valve driving voltage 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 solenoid valve driving current drops (corresponding to the T4 stage);
when the fuel injection pulse width control signal is at the 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, and the solenoid valve driving current decreases (the solenoid valve driving current discharges through the diode D1 and the diode D3, corresponding to the T5 phase).
Fig. 12 is a timing chart of a second solenoid valve driving current in the embodiment, and in combination with fig. 9, 10 and 12, the operation of the solenoid valve driving control apparatus 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 placed in a second driving current output mode;
when the voltage threshold switching module 103 receives the second electromagnetic valve driving current waveform output signal, the output end Vref1 outputs a peak voltage threshold, and the output end Vref2 outputs a second voltage maintenance threshold;
when the fuel injection pulse width control signal is at the rising edge and the current modulation module 102 receives a one-stage second electromagnetic valve driving current output signal;
the current modulation module 102 controls the first switching tube 2021 to be turned on, the second switching tube 2041 to be turned off, and the third switching tube 205 to be turned on, and at this time, the solenoid driving current through the solenoid 400 rises (corresponding to the T1 phase);
when the solenoid valve driving voltage is greater than the peak voltage threshold, the first voltage comparing module 501 outputs a low level control signal, and at this time, the current modulating module 102 controls the first switching tube 2021 to be turned off, and the solenoid valve driving current drops;
when the solenoid valve driving voltage 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 solenoid valve driving current rises, when the solenoid valve driving voltage is larger 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 solenoid valve driving current drops (corresponding to the T2 stage);
when the voltage threshold switching module 103 receives the driving current output signal of the second electromagnetic valve in two stages, an output end Vref2 of the voltage threshold switching module 103 outputs a fourth voltage maintenance threshold;
when the current modulation module 102 receives the second electromagnetic valve driving current output signal of the two stages, the current modulation module 102 controls the second switch tube 2021 to be turned off, and the electromagnetic valve driving current is reduced (corresponding to the T3 stage);
when the solenoid valve driving voltage 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 solenoid valve driving current rises, when the solenoid valve driving voltage is larger 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 solenoid valve driving current drops (corresponding to the T4 stage);
when the fuel injection pulse width control signal is at the falling edge, the current modulation module 102 controls the second switching tube 2041 to be turned off, the third switching tube 205 to be turned off, and the electromagnetic valve driving current is reduced (corresponding to the period T5).
Based on the beneficial effects of the scheme shown in fig. 1, in the scheme, the driving control method can be used for controlling the electromagnetic valve driving current outputting complex waveforms, specifically, when the driving current in the first form is output, the on-line switching of the current waveforms in the form can be realized based on the electromagnetic valve driving voltage, the first voltage maintaining threshold value and the third voltage maintaining threshold value; when the driving current of the second mode is outputted, the on-line switching of the current waveform in the mode 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 still another electromagnetic valve driving control device in an embodiment, and as an implementation manner, the current form control module 101 and the current modulation module 102 may be designed as functional modules in a CPLD (Complex Programmable Logic Device ) based on the scheme shown in fig. 10.
In this embodiment, the first electromagnetic valve driving current source may be a high-voltage source, and the second electromagnetic valve driving current source may be a battery.
Referring to fig. 13, the current profile control module 101 may specifically include a first two-out selector 1011, a first D flip-flop 1012.
The signal input end of the first two-out selector 1011 is used for receiving a high voltage indication signal, and the first D trigger outputs an inverted signal; the signal selection terminal of the first two-by-one selector 1011 is used for receiving a current waveform selection signal; the output signal of the first two-by-one selector 1011 is used as a high-voltage open signal source;
the input of the first D flip-flop 1012 is a high voltage indication inversion 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.
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 inversion signal are mutually inverted signals (e.g., the high voltage indication signal is 1, and the high voltage indication inversion signal is 0).
The current waveform selection signal may be a square wave signal, which may be the first solenoid driving current waveform output signal when the current waveform selection signal is at a low level, and may be the 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 alternative 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 a high voltage control inversion signal and a current phase switching inversion signal, and the signal selection end of the second alternative selector 1021 is used for receiving a current waveform selection signal.
The input of the first logic gate unit 1022 is a high-voltage open signal source and a current phase switching signal, and the output is a high-voltage control signal.
The input of the second logic gate unit 1023 is a second alternative selector output signal, an oil injection pulse width control signal, a storage battery current indication signal, and the output is a storage battery control signal.
The third logic gate unit 1024 has an input of a fuel injection pulse width control signal and an output of a solenoid valve low side control signal.
The current phase switching signal is a square wave signal, and may be used as a one-phase first solenoid valve driving current output signal when the current phase switching signal is at a high level, and may be used as a two-phase first solenoid valve driving current output signal when the current phase switching signal is at a low level.
Illustratively, the battery current indication signal is an output signal of the second voltage comparison module 502.
The high voltage control signal is a square wave signal, and may be used as the first solenoid driving current source on signal when the high voltage control signal is at a high level, and as the first solenoid driving current source off signal when the high voltage control signal is at a low level.
Illustratively, the high voltage control signal and the high voltage control inversion signal are mutually inverted signals.
The battery control signal is illustratively a square wave signal that may be used as the second solenoid drive current source on signal when the battery control signal is at a high level and as the second solenoid drive current source off signal when the battery control signal is at a low level.
The solenoid valve low side control signal is a square wave signal, which may be a solenoid valve low side on signal when the solenoid valve low side control signal is high, and may be a solenoid valve low side off signal when the solenoid valve low side control signal is high.
Referring to fig. 13, the operation of the solenoid valve drive control apparatus includes:
the third logic gate unit 1024 generates a solenoid valve low-end control signal according to the fuel injection pulse control signal, and controls the third switching tube 205 to be turned on or turned off through the solenoid valve low-end control signal;
when the current waveform selection signal represents a first solenoid valve driving current waveform output signal, the first two-by-one 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 logically switches the signal source and the current phase to obtain a high-voltage control signal, and the first switch tube 2021 is controlled to be turned on or off by the high-voltage control signal;
the second one-out-of-two selector 1021 selects the current phase switching inversion signal as the second one-out-of-two selector output signal;
the second logic gate unit 1023 logically and logically obtains a second alternative selector output signal, an oil injection pulse width control signal and a storage battery current indication signal to obtain a storage battery control signal, and the second switch tube 2041 is controlled to be turned on or off by the storage battery control signal;
when the current waveform selection signal represents a second solenoid valve driving current waveform output signal, the first two-by-one selector 1011 selects the first D flip-flop output inverted signal as a 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 performs logical AND on the high-voltage open signal source and the current phase switching signal to obtain a high-voltage control signal;
the second one-out-of-two selector 1021 selects the high voltage control inversion signal as the second one-out-of-two selector output signal;
the second logic gate unit 1023 logically and-outputs the second alternative selector output signal, the fuel injection pulse width control signal, and the battery current indication signal to obtain the battery control signal.
Illustratively, in this solution, the fuel injection pulse width control signal is used as the zero clearing signal of the first D flip-flop 1012 at the same time, so as to ensure that the first D flip-flop 1012 does not operate when the fuel injection pulse width control signal is invalid (when the fuel injection pulse width control signal is at a low level).
In the scheme shown in fig. 13, a first voltage comparison module is used to compare the driving voltage of the electromagnetic valve, the first voltage maintenance threshold value and the 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 used for comparing the driving voltage of the electromagnetic valve, the second voltage maintenance threshold, the third voltage maintenance threshold and the fourth voltage maintenance threshold, so that a storage battery current indication signal is generated, output control of driving current is realized based on the storage battery current indication signal, and control signals are few and control logic is clear.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A solenoid valve drive control method, characterized by comprising:
receiving a first electromagnetic valve driving current waveform output signal, controlling the first electromagnetic valve driving current waveform output signal to be placed in a first driving current output mode, and obtaining a first current maintenance threshold;
collecting electromagnetic valve driving current, generating a first electromagnetic valve driving current source disconnection signal when the electromagnetic valve driving current is larger than the first current maintenance threshold value, and generating a first electromagnetic valve driving current source connection signal when the electromagnetic valve driving current is smaller than the first current maintenance threshold value;
when receiving a second electromagnetic valve driving current waveform output signal, controlling the second electromagnetic valve driving current waveform output signal to be placed in a second driving current output mode, and acquiring a peak current threshold value and a second current maintenance threshold value;
and collecting solenoid valve driving current, generating a second solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the peak current threshold value, generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the second current maintenance threshold value, and generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the second current maintenance threshold value.
2. The solenoid valve drive control method of claim 1, wherein controlling to be placed in the first drive current output mode further comprises obtaining a third current maintenance threshold;
collecting solenoid valve driving current when receiving a first-order first solenoid valve driving current output signal, generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the first current maintenance threshold value, and generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the first current maintenance threshold value;
and when receiving a second-order first electromagnetic valve driving current output signal, collecting electromagnetic valve driving current, when the electromagnetic valve driving current is larger than the third current maintenance threshold value, generating a first electromagnetic valve driving current source disconnection signal, and when the electromagnetic valve driving current is smaller than the third current maintenance threshold value, generating a first electromagnetic valve driving current source connection signal.
3. The solenoid valve drive control method according to claim 1, wherein controlling to be placed in the second drive current output mode further comprises acquiring a fourth current maintenance threshold;
collecting solenoid valve driving current when receiving a first-order second solenoid valve driving current output signal, generating a second solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the peak current threshold value, generating a first solenoid valve driving current source connection signal when the solenoid valve driving current is smaller than the second current maintenance threshold value, and generating a first solenoid valve driving current source disconnection signal when the solenoid valve driving current is larger than the second current maintenance threshold value;
and when receiving a second-order second electromagnetic valve driving current output signal, collecting electromagnetic valve driving current, when the electromagnetic valve driving current is smaller than the fourth current maintenance threshold value, generating a first electromagnetic valve driving current source on signal, and when the electromagnetic valve driving current is larger than the fourth current maintenance threshold value, generating a first electromagnetic valve driving current source off signal.
4. The solenoid valve drive control method 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:
generating a low-end conduction signal of the electromagnetic valve.
5. The solenoid valve drive control method according to claim 1, wherein a solenoid valve drive voltage is generated from the solenoid valve drive current, and a first voltage maintenance threshold is generated from the first current maintenance threshold;
and judging whether the electromagnetic valve driving current is larger than the 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 of claim 1, wherein a solenoid valve drive voltage is generated from the solenoid valve drive current, a spike voltage threshold is generated from a spike current threshold, and a second voltage maintenance threshold is generated from 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 larger 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 valve drive control method of claim 1, further comprising obtaining a fuel injection pulse width control signal for determining a period of the first solenoid valve drive current or the second solenoid valve drive current.
8. The solenoid valve driving control method of claim 7, wherein the fuel injection pulse width control signal is a square wave signal.
9. The solenoid valve drive control method of claim 1, wherein the first solenoid valve drive current source off signal, the first solenoid valve drive current source on signal, the second solenoid valve drive current source on signal, and the second solenoid valve drive current source off signal are voltage type control signals.
10. The solenoid valve drive control method of claim 4, wherein the solenoid valve low side on signal is a voltage type control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395188.9A CN114704411B (en) | 2022-04-14 | 2022-04-14 | Electromagnetic valve driving control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395188.9A CN114704411B (en) | 2022-04-14 | 2022-04-14 | Electromagnetic valve driving control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114704411A CN114704411A (en) | 2022-07-05 |
| CN114704411B true CN114704411B (en) | 2023-06-06 |
Family
ID=82174424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210395188.9A Active CN114704411B (en) | 2022-04-14 | 2022-04-14 | Electromagnetic valve driving control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114704411B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003278585A (en) * | 2002-03-22 | 2003-10-02 | Denso Corp | Solenoid valve driving device |
| JP4970179B2 (en) * | 2007-07-23 | 2012-07-04 | 日立オートモティブシステムズ株式会社 | Electromagnetic load control device |
| CN101806255B (en) * | 2010-03-19 | 2013-01-02 | 清华大学 | Method and system for driving electromagnetic valve of diesel engine |
| JP6079571B2 (en) * | 2013-11-11 | 2017-02-15 | 株式会社デンソー | Solenoid valve drive |
| CN104038033B (en) * | 2014-06-17 | 2017-01-11 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Electromagnetic valve current modulation circuit with flexible adjustable holding current |
| CN106014731B (en) * | 2016-05-23 | 2018-09-21 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | The recyclable drive circuit of injector of energy |
| CN110748428B (en) * | 2019-11-22 | 2022-04-19 | 无锡职业技术学院 | Oil sprayer driving circuit |
| JP2021113538A (en) * | 2020-01-20 | 2021-08-05 | 日立Astemo株式会社 | Solenoid valve drive device |
| CN112879649B (en) * | 2021-02-23 | 2022-02-15 | 一汽解放汽车有限公司 | Control circuit for peak holding type solenoid valve |
-
2022
- 2022-04-14 CN CN202210395188.9A patent/CN114704411B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114704411A (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4815502B2 (en) | Control device for internal combustion engine | |
| US5975057A (en) | Fuel injector control circuit and system with boost and battery switching, and method therefor | |
| EP2590311A1 (en) | Power converting apparatus | |
| US20120180762A1 (en) | Method for driving a solenoid valve of a fuel injector | |
| CN110794279A (en) | Clamp switch tube abnormity detection method, detection circuit and switch circuit | |
| JP2008220119A (en) | Gate voltage control circuit and gate voltage control method | |
| EP0249448B1 (en) | Defect detector circuit for inductive load driving circuit | |
| US7064553B2 (en) | Open-circuit detecting circuit | |
| US6257205B1 (en) | System for controlling a fuel injector | |
| CN114704411B (en) | Electromagnetic valve driving control method | |
| US7733073B2 (en) | Current regulator with current threshold dependent duty cycle | |
| US20140285121A1 (en) | Modulation scheme for driving a piezo element | |
| US7564199B2 (en) | Discharge lamp lighting circuit | |
| CN104578770B (en) | Pass through the switching mode DC-DC converter improved efficiency of adaptive driver STAG | |
| JP2019110699A (en) | Drive unit and semiconductor device | |
| US6213099B1 (en) | System for controlling a fuel injector | |
| US9350237B2 (en) | Control circuit applicable to power converter and operation method thereof | |
| US20040263219A1 (en) | Drive circuit and drive method | |
| EP2653714A1 (en) | Glow plug drive control method and glow plug drive control apparatus | |
| KR101491658B1 (en) | Switching Amplifier Apparatus and Control Method Thereof | |
| KR100997495B1 (en) | Charge control circuit | |
| JP4453006B2 (en) | Relay drive circuit | |
| CN107624146B (en) | Electronic ignition system for internal combustion engine and control method of the electronic ignition system | |
| US10443559B2 (en) | Electronic ignition system for an internal combustion engine and control method for said electronic ignition system | |
| KR102085340B1 (en) | Watchdog monitoring system that utilizes a disable application to monitor operation of an enable application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |