CN114060161A - Boost protection device, boost protection method and computer readable medium - Google Patents
Boost protection device, boost protection method and computer readable medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 52
- 230000002159 abnormal effect Effects 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/2013—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost voltage source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
Abstract
The invention relates to a boost protection device, comprising: a power supply module part; a microprocessor unit that instructs the power module unit to supply power to the drive control unit, the voltage boosting module unit, and the current monitoring module unit when detecting a signal from the accelerator pedal sensor; a boost module unit; a current monitoring module part; a drive control unit that instructs the current monitoring module unit to sequentially detect currents flowing to the boosting module unit at two predetermined timings before the first turn of the boosting module unit is completed, determines that the boosting module unit is abnormal when a difference between the two sequentially detected current values is greater than a predetermined value, and instructs the boosting module unit to stop operating and instructs the discharge protection module unit to start operating when the boosting module unit is determined to be abnormal; and a discharge protection module unit that performs discharge protection processing when receiving an instruction to start operation from the drive control unit.
Description
Technical Field
The invention relates to a boost protection device, a boost protection method and a computer readable medium, which can confirm whether a boost loop is abnormal or not in advance so as to protect corresponding components and external loads from being burnt.
Background
In the in-cylinder direct injection technique, a Boost (Boost) circuit is generally used to Boost the power supply voltage.
Fig. 4 is a circuit diagram showing an example of such a conventional booster circuit. The working principle of the boosting circuit is as follows: after an Ignition (IGN) switch is powered on, when a Microprocessor (MPU) detects an acceleration signal from an accelerator pedal sensor, a low-level signal is immediately transmitted to a power module part, a relay (PTIGN2) is conducted at the moment, a boosting module part starts to work, and a current monitoring module part and a voltage monitoring module part start to work normally; when the voltage value monitored by the point B reaches the preset target set voltage in the software processing mechanism, the driving control part (driving control IC) outputs a high level signal to the point A, so that the boosting module part stops working, and the oil nozzle driving module part starts working at the moment; immediately after the fuel injector driving module starts operating, the voltage value monitored at point B becomes smaller than the target set voltage, and at this time, the driving control unit immediately outputs a low level signal to point a to turn off the MOSFET1, and the boosting module immediately starts boosting.
Disclosure of Invention
Technical problem to be solved by the invention
However, with the development of the in-cylinder direct injection technology, the Boost capability of the Boost (Boost) circuit is more and more required in recent years; it follows that some parts in the boost circuit are prone to burn out of the corresponding components and external loads due to abnormal short circuits.
In the existing boosting circuit, only the current flowing to the boosting module part and the maximum boosting voltage of a point B are monitored; when a part of components of the boosting loop are abnormally short-circuited, response processing cannot be timely carried out, and therefore corresponding components and external loads can be burnt.
Technical solution for solving technical problem
The present invention has been made in view of the above problems, and an object of the present invention is to provide a boost protection device and a boost protection method that can prevent the corresponding components and the external load from being burned by confirming in advance whether or not the boost circuit is abnormal.
A first aspect of a boost protection device according to a first embodiment of the present invention includes: a power module part for supplying power to the microprocessor part, the drive control part, the boosting module part, the current monitoring module part and the voltage monitoring module part; a microprocessor unit that instructs the power module unit to supply power to the drive control unit, the voltage boosting module unit, the current monitoring module unit, and the voltage monitoring module unit when detecting a signal from an accelerator pedal sensor; a boosting module unit for boosting a power supply voltage to a target set voltage; a current monitoring module unit for detecting a current flowing to the boosting module unit; a voltage monitoring module unit for detecting an output voltage of the boosting module unit; a drive control unit that instructs the current monitoring module unit to sequentially detect currents flowing to the boosting module unit at two predetermined timings before the first-round boosting of the boosting module unit is completed, determines that the boosting module unit is abnormal when a difference between the two sequentially detected current values is larger than a predetermined value, and instructs the boosting module unit to stop operating and instructs the discharge protection module unit to start operating when the boosting module unit is determined to be abnormal; and a discharge protection module unit that performs discharge protection processing when receiving an instruction to start operation from the drive control unit.
In the second aspect of the boost protection device according to the first aspect of the present invention, it is preferable that the boost module unit is determined to be normal when a difference between two sequentially detected current values is equal to or less than a predetermined value, the fuel injector driving module unit starts to operate to drive the fuel injector to inject fuel when the output voltage detected by the voltage monitoring module unit reaches the target set voltage when the boost module unit is determined to be normal, the drive control unit instructs the boost module unit to stop operating, and the drive control unit instructs the boost module unit to start operating again when the output voltage detected by the voltage monitoring module unit becomes less than the target set voltage after the fuel injector driving module starts to operate.
In the third aspect of the booster protection device according to the first aspect of the present invention, in the first or second aspect, it is preferable that the drive control unit outputs information to prompt a user to perform maintenance when the booster module unit is determined to be abnormal.
In a fourth aspect of the boost protection method according to the first embodiment of the present invention, the step of: when the microprocessor part detects a signal from an accelerator pedal sensor, the microprocessor part instructs the power supply module part to supply power to the drive control part, the boosting module part, the current monitoring module part and the voltage monitoring module part; a step in which the drive control unit instructs the current monitoring module unit to sequentially detect currents flowing to the boosting module unit at predetermined two times before the first-round boosting of the boosting module unit is completed; a step of judging that the boosting module part is abnormal when the difference value of the two sequentially detected current values is larger than a preset value; and instructing the boost module unit to stop operating and instructing the discharge protection module unit to start operating, when it is determined that the boost module unit is abnormal.
In a fifth aspect of the boost protection method according to the first aspect of the present invention, it is preferable that the boost module unit is determined to be normal when a difference between two sequentially detected current values is equal to or less than a predetermined value, the fuel injector driving module unit starts to operate to drive the fuel injector to inject fuel when the output voltage detected by the voltage monitoring module unit reaches a target set voltage when the boost module unit is determined to be normal, the drive control unit instructs the boost module unit to stop operating, and the drive control unit instructs the boost module unit to start operating again when the output voltage detected by the voltage monitoring module unit becomes less than the target set voltage after the fuel injector driving module starts to operate.
In the sixth aspect of the booster protection method according to the first embodiment of the present invention, it is preferable that the drive control unit outputs information for prompting a user to perform maintenance when the booster module unit is determined to be abnormal.
The computer-readable medium according to the first embodiment of the present invention stores a program for executing the boosting protection method according to the fourth to sixth aspects.
Effects of the invention
According to the boost protection device and the boost protection method, whether the boost loop is abnormal or not can be confirmed in advance, so that the corresponding components and the external load can be protected from being burnt, and a user can be reminded to maintain.
Drawings
Fig. 1 is a circuit diagram for explaining a boost protection device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram showing waveform timing of signals in each part of the boost protection device according to the embodiment of the present invention.
Fig. 3 is a flowchart for explaining a boost protection method according to an embodiment of the present invention.
Fig. 4 is a circuit diagram showing one example of an existing booster circuit.
Detailed Description
Next, preferred embodiments of a boost protection device and a boost protection method according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals.
< Structure of Voltage boost protection device >
Fig. 1 is a circuit diagram for explaining a boost protection device according to an embodiment of the present invention.
The boost protection device of the present invention is provided in, for example, an in-cylinder direct injection engine, and boosts a voltage from a power supply to cause the fuel injection nozzle drive module 5 to drive the fuel injection nozzle to inject fuel. The protection device steps up includes: a power module unit 4, a microprocessor unit (MPU)7, a booster module unit 2, a current monitoring module unit 1, a voltage monitoring module unit 3, a drive control unit 8, and a discharge protection module unit 6.
One end of the power module unit 4 is connected to a relay (PTIGN2)9, and the other end of the power module unit 4 is connected to the microprocessor unit 7 and the drive control unit 8, and supplies power to the microprocessor unit 7, the drive control unit 8, the voltage boosting module unit 2, the current monitoring module unit 1, and the voltage monitoring module unit 3.
When detecting an acceleration signal from an accelerator pedal sensor, the microprocessor unit 7 instructs the power supply module 4 to supply power to the drive control unit 8, the booster module 2, the current monitoring module 1, and the voltage monitoring module 3.
The booster module unit 2 boosts a voltage from a power supply to a target set voltage Umax. The boost module part 2 includes a first transistor MOSFET1, a first inductor L2, a first diode D2, a first resistor R2, and a first capacitor C2.
One end of the first inductor L2 is connected to the current detection resistor R1, and the other end of the first inductor L2 is connected to the drain of the first transistor MOSFET1 and the anode of the first diode D2. The drain of the first transistor MOSFET1 is connected to the other end of the first inductor L2 and the anode of the first diode D2, the source of the first transistor MOSFET1 is grounded, and the gate of the first transistor MOSFET1 is connected to one end of the first resistor R2 and to the drive control unit 8.
An anode of the first diode D2 is connected to the other end of the first inductor L2 and a drain of the first transistor MOSFET1, and a cathode of the first diode D2 is connected to one end of the first capacitor C2 and to the voltage monitoring module part 3 and the discharge protection module part 6. One end of the first capacitor C2 is connected to the cathode of the first diode D2, and the other end of the first capacitor C2 is grounded. One end of the first resistor R2 is connected to the gate of the first transistor MOSFET1, and the other end of the first resistor R2 is grounded.
The current monitoring module unit 1 detects the current flowing to the boosting module unit 2 through the current detection resistor R1, and transmits the detection result to the drive control unit 8. The current detection resistor R1 is connected between the relay (PTIGN2)9 and one end of the first inductor L2 of the boost module unit 2
The voltage monitoring block unit 3 detects a voltage at a point B, which is an output voltage of the boosting block unit 2, and transmits a detection result to the drive control unit 8.
The voltage monitoring module part 3 includes a second resistor R3 and a second capacitor C3. One end of the second resistor R3 is connected to the output end of the boost module unit 2, that is, the point B, and the other end of the second resistor R3 is connected to one end of the second capacitor C3 and to the drive control unit 8. One end of the second capacitor C3 is connected to the other end of the second resistor R3, and the other end of the second capacitor C3 is grounded.
The drive control unit 8 is, for example, a drive control IC, and the drive control unit 8 instructs the current monitoring module unit 1 to sequentially detect currents flowing to the boosting module unit 2 at predetermined two times before the first-round boosting of the boosting module unit 2 is completed, determines that the boosting module unit 2 is abnormal when a difference between two sequentially detected current values is larger than a predetermined value 〥 (theoretical value), and instructs the boosting module unit 2 to stop operating and instructs the discharge protection module unit 6 to start operating when it is determined that the boosting module unit 2 is abnormal.
Specifically, when the microprocessor unit 7 detects an acceleration signal from the accelerator pedal sensor after the Ignition (IGN) switch is turned on, a low level signal is immediately supplied to the power module unit 4, and the relay (PTIGN2) is turned on, so that the booster module unit 2 starts to operate, and the current monitoring module unit 1 and the voltage monitoring module unit 3 start to operate normally.
Fig. 2 is a schematic diagram showing waveform timing of signals in each part of the boost protection device according to the embodiment of the present invention.
As shown in fig. 2, before the first-round boosting of the boosting module section 2 is completed, the current monitoring module section 1 sequentially detects the current flowing to the boosting module section 2 twice at time t1 and time t2, and compares a difference Abs (i1-i2) between two sequentially detected current values i1 and i2 with a predetermined value 〥.
If the difference Abs (i1-i2) between the two current values is equal to or less than the predetermined value 〥, the boosting module unit 2 is determined to be normal, and the following operations are performed: when the voltage value monitored by the point B reaches a target set voltage Umax preset in a software processing mechanism, the driving control part 8 outputs a high level signal to the point A, so that the boosting module part 2 stops working, and the oil nozzle driving module part 5 starts working at the moment; immediately after the fuel injector drive module unit 5 starts operating, the voltage value monitored at point B becomes smaller than the target set voltage Umax, and at this time, the drive control unit 8 immediately outputs a low level signal to point a to turn off the MOSFET1, and the boost module unit 2 immediately starts boosting.
If the difference Abs (i1-i2) between the two current values is greater than the predetermined value 〥, it is determined that the boosting module unit 2 is abnormal, and the following operations are performed: the driving control part 8 immediately outputs a high level signal to the point C, and the discharge protection module part 6 immediately starts to work; the driving control part 8 also outputs a high level signal to the point A, and the boosting module part 2 stops working; in addition, the user is reminded to maintain through a vehicle side report code preset in the software processing mechanism.
The sampling times t1 and t2 can be selected by using the following equation (1).
i＝I0×(1-e(-t/T)) Formula (1)
In the formula I0Is the loop stabilization current when boosted to the target set voltage Umax; and T is L/R, L is a self-inductance coefficient, and R is a resistance value.
As an example, in FIG. 2, 40% xI0The time corresponding to the current value of (a) is t1, 60% × I0The time t2 corresponds to the current level of (c). Here, the ratios of 40% and 60% are only an example as long as a sufficient time is left for the calculation of the current difference, and the present invention is not particularly limited.
For example, if L is 4.7 μ H and R is 10.2m Ω, the following applies
T＝L/R＝(4.7×10-6)/(10.2×10-3)＝0.461×10-3
And if 40% xI is assumed0The time corresponding to the current value of (a) is t1, 60% × I0The time corresponding to the current level of (3) is t2, then
According to 1-e(-t1/T)＝40％，1-e(-t2/T)60% can be obtained
t1＝235.52μs，t2＝422.45μs。
Upon receiving an instruction to start operation from the drive control unit 8, the discharge protection module unit 6 performs discharge protection processing.
The discharge protection module 6 includes a second transistor MOSFET2, a third resistor R61, and a fourth resistor R62. The drain of the second transistor MOSFET2 is connected to one end of the third resistor R61, the source of the second transistor MOSFET2 is grounded, and the gate of the second transistor MOSFET2 is connected to one end of the fourth resistor R62. One end of the third resistor R61 is connected to the drain of the second transistor MOSFET2, and the other end of the third resistor R61 is connected to the output terminal of the boost module unit 2, i.e., the point B. One end of the fourth resistor R62 is connected to the gate of the second transistor MOSFET2, and the other end of the fourth resistor R62 is grounded.
The inventors of the present invention have found through investigation that, as the requirement for the boosting capability of the boosting circuit becomes higher, the first diode D2, the first capacitor C2, and the first transistor MOSFET1 in the boosting module section 2 are easily short-circuited.
By adopting the boost protection device of the invention, whether the first diode D2, the first capacitor C2 and the first transistor MOSFET1 in the boost module part 2 are abnormal or not can be confirmed in advance before the first round of boost of the boost module part 2 is completed, and the discharge protection processing can be carried out through the discharge protection module part 6 under the condition that the abnormality is judged to occur, so that the corresponding components and the external load can be protected from being burnt, and a user can be reminded to maintain the abnormal part. Therefore, the reliability of the booster circuit and the in-cylinder direct injection engine comprising the booster circuit can be improved, and the user experience is improved.
< description of the boost protection method >
Fig. 3 is a flowchart for explaining a boost protection method according to an embodiment of the present invention.
First, after the flow starts (step ST1), in step ST2, it is confirmed that the ignition switch (IGN switch) is powered ON (ON). Then, in step ST3, the microprocessor unit 7 instructs the power module unit 4 to supply power when detecting an acceleration signal from an accelerator pedal sensor. Next, in steps ST4, ST5, and ST6, the drive control unit 8, the voltage boosting module unit 2, the current monitoring module unit 1, and the voltage monitoring module unit 3 start operating after receiving the power supply from the power supply module unit 4.
In step ST7, before the first-pass boosting of the boosting module section 2 is completed, the current monitoring module section 1 sequentially detects the currents i1, i2 flowing to the boosting module section 2 twice at time t1 and time t 2. Then, in step ST8, the difference Abs (i1-i2) of the two current values i1, i2 is compared with the predetermined value 〥.
When it is determined that the difference Abs (i1-i2) between the two current values is greater than the predetermined value 〥 (ST8: no), it is determined that the voltage boosting module unit 2 is abnormal and the operation of the voltage boosting module unit 2 is stopped (step ST15), and the operation of the discharge protection module unit 6 is started (step ST 16). Then, in step ST17, the user is prompted to perform maintenance by a vehicle-side entry code preset in the software processing mechanism, and the process ends (step ST 18).
When it is determined that the difference Abs (i1-i2) between the two current values is equal to or less than the predetermined value 〥 (ST8: yes), the booster module unit 2 is determined to be normal (step ST9), and the process proceeds to step ST10, where the booster module unit 2 continues to operate normally.
Then, in step ST11, it is determined whether or not the voltage at the point B has reached the target set voltage Umax. When it is determined that the voltage at the point B has reached the target set voltage Umax (ST 11: yes), the boosting module unit 2 stops operating (step ST12), and the fuel injection nozzle driving module unit 5 starts operating to drive the fuel injection nozzle to inject fuel (step ST13), after which the flow ends (step ST 14).
When it is determined that the voltage at the point B has not reached the target set voltage Umax (ST 11: no), the process returns to step ST10, and the booster module unit 2 continues its operation.
In the present invention, a computer-readable medium stores a program for executing the above-described boosting protection method. The computer-readable medium is not particularly limited, and for example, a hard disk, an optical disk such as a CD-ROM/MO/MD/DVD/CD-R, a semiconductor memory such as an IC card, a mask ROM/EPROM/EEPROM/flash ROM, or the like can be used.
As described above, the present invention has been described in detail, but the above description is only an example in all aspects, and the present invention is not limited thereto. Countless variations not illustrated are to be construed as conceivable without departing from the scope of the present invention.
Industrial applicability of the invention
The boost protection device and the boost protection method according to the present invention can be widely applied to devices using a boost circuit, such as a direct injection engine.
Description of the reference symbols
1 current monitoring module part
2 boost module part
3 voltage monitoring module part
4 power supply module part
5 oil nozzle driving module part
6 discharge protection module
7 Microprocessor section (MPU)
8 drive control part
9 Relay (PTIGN2)
10 ignition switch (IGN switch)
11 power supply VBTT
R1 current detection resistor
MOSFET1 first transistor
L2 first inductor
D2 first diode
R2 first resistor
C2 first capacitor
MOSFET2 second transistor
R61 third resistor
R62 fourth resistor
R3 second resistor
C3 second capacitance.
Claims (7)
1. A boost protection device, comprising:
a power module part for supplying power to the microprocessor part, the drive control part, the boosting module part, the current monitoring module part and the voltage monitoring module part;
a microprocessor unit that instructs the power module unit to supply power to the drive control unit, the voltage boosting module unit, the current monitoring module unit, and the voltage monitoring module unit when detecting a signal from an accelerator pedal sensor;
a boosting module unit for boosting a power supply voltage to a target set voltage;
a current monitoring module unit for detecting a current flowing to the boosting module unit;
a voltage monitoring module unit for detecting an output voltage of the boosting module unit;
a drive control unit that instructs the current monitoring module unit to sequentially detect currents flowing to the boosting module unit at two predetermined timings before the first-round boosting of the boosting module unit is completed, determines that the boosting module unit is abnormal when a difference between the two sequentially detected current values is larger than a predetermined value, and instructs the boosting module unit to stop operating and instructs the discharge protection module unit to start operating when the boosting module unit is determined to be abnormal; and
and a discharge protection module unit that performs discharge protection processing when receiving an instruction to start operation from the drive control unit.
2. A boost protection device according to claim 1,
when the difference value of the two current values detected in sequence is less than or equal to a preset value, the boosting module part is judged to be normal,
when the boosting module part is judged to be normal and the output voltage detected by the voltage monitoring module part reaches the target set voltage, the oil nozzle driving module part starts to work to drive the oil nozzle to inject oil, and the driving control part instructs the boosting module part to stop working,
when the output voltage detected by the voltage monitoring module part becomes less than the target set voltage after the fuel injection nozzle driving module starts to operate, the driving control part instructs the boosting module part to start to operate again.
3. A boost protection device according to claim 1 or 2,
and outputting information for reminding maintenance to a user when the drive control part judges that the boosting module part is abnormal.
4. A boost protection method comprises the following steps:
when the microprocessor part detects a signal from an accelerator pedal sensor, the microprocessor part instructs the power supply module part to supply power to the drive control part, the boosting module part, the current monitoring module part and the voltage monitoring module part;
a step in which the drive control unit instructs the current monitoring module unit to sequentially detect currents flowing to the boosting module unit at predetermined two times before the first-round boosting of the boosting module unit is completed;
a step of judging that the boosting module part is abnormal when the difference value of the two sequentially detected current values is larger than a preset value; and
and a step in which, when it is determined that the voltage boosting module unit is abnormal, the drive control unit instructs the voltage boosting module unit to stop operating and instructs the discharge protection module unit to start operating.
5. A boost protection method according to claim 4,
when the difference value of the two current values detected in sequence is less than or equal to a preset value, the boosting module part is judged to be normal,
when the boosting module part is judged to be normal and the output voltage detected by the voltage monitoring module part reaches the target set voltage, the oil nozzle driving module part starts to work to drive the oil nozzle to inject oil, and the driving control part instructs the boosting module part to stop working,
when the output voltage detected by the voltage monitoring module part becomes less than the target set voltage after the fuel injection nozzle driving module starts to operate, the driving control part instructs the boosting module part to start to operate again.
6. A boost protection method according to claim 4 or 5,
and outputting information for reminding maintenance to a user when the drive control part judges that the boosting module part is abnormal.
7. A computer-readable medium storing a program for executing the step-up protection method according to any one of claims 4 to 6.
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| CN202010748655.2A CN114060161A (en) | 2020-07-30 | 2020-07-30 | Boost protection device, boost protection method and computer readable medium |
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| CN202010748655.2A CN114060161A (en) | 2020-07-30 | 2020-07-30 | Boost protection device, boost protection method and computer readable medium |
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| CN106574569A (en) * | 2014-08-25 | 2017-04-19 | 日立汽车系统株式会社 | Diagnosis of boost capacitor using discharge circuit |
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| CN105569859A (en) * | 2015-12-14 | 2016-05-11 | 中国北方发动机研究所(天津) | High-speed electromagnetic valve drive method with boosting and fault diagnosing functions and circuit |
| CN108386288A (en) * | 2018-02-24 | 2018-08-10 | 清华大学 | Fuel injector driving device |
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