CN108612591B - Engine igniter starting interlocking control system and control method thereof - Google Patents
Engine igniter starting interlocking control system and control method thereof Download PDFInfo
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- CN108612591B CN108612591B CN201810468417.9A CN201810468417A CN108612591B CN 108612591 B CN108612591 B CN 108612591B CN 201810468417 A CN201810468417 A CN 201810468417A CN 108612591 B CN108612591 B CN 108612591B
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- state signal
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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
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
Abstract
The invention discloses a starting interlocking control system of an engine igniter and a control method thereof, wherein the starting interlocking control system comprises a storage battery, an inverter, a starting motor and an MCU controller for controlling starting, wherein the storage battery, the inverter and the starting motor are mutually and electrically connected; wherein, the starting motor is a sensorless permanent magnet synchronous motor; a first electronic switch is connected between the storage battery and the inverter and/or a second electronic switch is connected between the inverter and the starting motor; the voltage output end of the starting motor is connected with an igniter starting interlocking device, the igniter starting interlocking device outputs a starting state signal of the starting motor, and the first electronic switch and/or the second electronic switch is/are controlled to be disconnected or not according to the starting state signal; the invention can accurately judge the state of the engine when the engine is ignited and started, and further reliably realize the ignition interlocking function of the engine according to the state of the engine.
Description
Technical Field
The invention belongs to the field of engine control, and particularly relates to an engine igniter starting interlocking control system and a control method for the engine igniter starting interlocking.
Background
The engine igniter of many vehicles such as motorcycles, automobiles and the like has the function of converting direct current provided by a low-voltage storage battery into alternating current through power electronics and outputting the alternating current to drive a starting motor to drive an engine to accelerate to a certain rotating speed so as to realize ignition. In order to prevent the starting motor which rotates at a high speed after ignition from generating high-voltage counter potential to enter an igniter controller with lower withstand voltage to damage devices, the ignition controller and the starting motor need to be effectively disconnected through a switch after ignition is finished, and ignition starting interlocking is realized to ensure safe ignition starting. In the traditional engine ignition technology, a brush direct current motor is generally adopted as a starting motor, and the starting interlocking of an igniter is effectively realized according to a detected motor rotating speed signal. The sensorless permanent magnet motor has no problems of carbon brushes, sparks, position sensors and the like, has high power density and high efficiency, can obviously improve the reliability and the economy of a system, and is a new generation of engine ignition starting technology which is actively researched and developed at present. However, due to the control principle of the sensorless permanent magnet motor, it is difficult to accurately judge the engine state during ignition start, and start interlock failure is easy to occur, thereby causing the situation that the igniter controller is damaged.
Disclosure of Invention
In view of the above, the present invention provides an engine igniter start interlock control system and a control method thereof, which can accurately determine the state of an engine during ignition start, and further reliably implement the ignition interlock function of the engine according to the state of the engine.
The technical scheme adopted by the invention is as follows:
a starting interlocking control system of an engine igniter comprises a storage battery, an inverter, a starting motor and an MCU controller, wherein the storage battery, the inverter and the starting motor are electrically connected with each other; wherein the content of the first and second substances,
the starting motor is a sensorless permanent magnet synchronous motor;
a first electronic switch is connected between the storage battery and the inverter and/or a second electronic switch is connected between the inverter and the starting motor;
the voltage output end of the starting motor is connected with an igniter starting interlocking device, the igniter starting interlocking device outputs a starting state signal of the starting motor, and whether the first electronic switch and/or the second electronic switch is disconnected or not is controlled according to the starting state signal.
Preferably, the inverter includes a switching tube assembly, the MCU controller drives the switching tube assembly through a switching tube driver, an input end of the switching tube assembly is connected to the battery, and an output end of the switching tube assembly is connected to the starting motor through the second electronic switch.
Preferably, the igniter start interlock device comprises a voltage dividing resistor and a comparator, wherein any two-phase voltage at the voltage output end of the starter motor is connected to the input end of the comparator through the voltage dividing resistor, and the output end of the comparator outputs the start state signal.
Preferably, the igniter starting interlock device comprises an uncontrolled rectifier, a divider resistor and a differential amplifier which are electrically connected in sequence, wherein the voltage output end of the starting motor is connected to the uncontrolled rectifier, and the output end of the differential amplifier outputs the starting state signal.
Preferably, the igniter start interlock device comprises an uncontrolled rectifier and an electromagnetic switch which are electrically connected with each other, wherein the voltage output end of the start motor is connected to the uncontrolled rectifier, and the state change of whether the electromagnetic switch is closed is used as the start state signal.
Preferably, the uncontrolled rectifier employs a rectifier diode device.
Preferably, the uncontrolled rectifier is connected in parallel with a filter capacitor.
Preferably, the control method of the engine igniter start interlock control system as described above includes the steps of:
A10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
A20) determining an engine start request rotational speed threshold value based on the corresponding relation between the start state signal and the engine rotational speed in the step A10);
A30) and when the MCU controller judges that the engine speed corresponding to the starting state signal reaches the engine starting requirement speed threshold value in the step A20), the MCU controller controls the first electronic switch and/or the second electronic switch to be switched off.
Preferably, the control method of the engine igniter start interlock control system as described above includes the steps of:
B10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
B20) determining an activation state signal threshold corresponding to the engine activation requesting rotational speed threshold based on the correspondence between the activation state signal and the engine rotational speed of step B10);
B30) and when the starting state signal reaches the starting state signal threshold value of the step B20), controlling the first electronic switch and/or the second electronic switch to be switched off through an MCU controller or a hardware control circuit.
Preferably, the control method of the engine igniter start interlock control system as described above includes the steps of:
C10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the direct current voltage output by the uncontrolled rectifier, and obtains the corresponding relation between the direct current voltage and the rotating speed of the engine;
C20) determining a direct-current voltage threshold value corresponding to the engine start request rotational speed threshold value based on the corresponding relation between the direct-current voltage and the engine rotational speed in the step C10);
C30) and when the direct current voltage reaches the direct current voltage threshold value of the step C20), the electromagnetic switch is closed, and the MCU controller or the hardware control circuit controls the disconnection of the first electronic switch and/or the second electronic switch.
The working principle and the advantages of the invention are as follows: after the engine igniter is started and ignited, the first electronic switch and the second electronic switch are both in a closed state, a sensorless permanent magnet synchronous motor serving as a starting motor receives alternating current input by an inverter and then drives the engine to rotate in an accelerated mode, and in the process of rotating in an accelerated mode, the starting motor generates counter electromotive force, so that the change of voltage signals output by the starting motor is caused; the invention provides a method for identifying and responding the change of the output voltage signal of the starting motor by adopting an igniter starting interlocking device to output a real-time starting state signal of the starting motor, and then judging the rotating speed of the engine according to the starting state signal.
Drawings
FIG. 1 is a schematic diagram of a connection configuration of an engine igniter start interlock control system according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the structural connection of the igniter start interlock device in embodiment 1 of the present invention;
FIG. 3 is a schematic view showing the structural connection of the igniter start interlock device in embodiment 2 of the present invention;
FIG. 4 is a schematic view showing the structural connection of the igniter initiation interlock device in embodiment 3 of the present invention.
Detailed Description
The embodiment of the invention discloses a starting interlocking control system of an engine igniter, which comprises a storage battery, an inverter, a starting motor and an MCU (microprogrammed control unit) controller, wherein the storage battery, the inverter, the starting motor and the MCU controller are electrically connected with each other; wherein, the starting motor is a sensorless permanent magnet synchronous motor; a first electronic switch is connected between the storage battery and the inverter and/or a second electronic switch is connected between the inverter and the starting motor; the voltage output end of the starting motor is connected with the igniter starting interlocking device, the igniter starting interlocking device outputs a starting state signal of the starting motor, and whether the first electronic switch and/or the second electronic switch is disconnected or not is controlled according to the starting state signal.
After the engine igniter is started and ignited, the first electronic switch and the second electronic switch are both in a closed state, a sensorless permanent magnet synchronous motor serving as a starting motor receives alternating current input by an inverter and then drives the engine to rotate in an accelerated mode, and in the process of rotating in an accelerated mode, the starting motor generates back electromotive force, so that the change of voltage signals output by the starting motor is caused; the embodiment of the invention provides that the igniter starting interlocking device is adopted to identify and respond the change of the output voltage signal of the starting motor to output a real-time starting state signal for starting the motor, and then the rotating speed of the engine is judged according to the starting state signal.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Example 1:
referring to fig. 1(a) and (b), an engine igniter start interlock control system includes a battery, an inverter, a start motor connected to an engine, and an MCU controller for controlling start, which are electrically connected to each other; wherein, the starting motor is a sensorless permanent magnet synchronous motor; a first electronic switch K1 is connected between the storage battery and the inverter, and a second electronic switch K2 is connected between the inverter and the starting motor;
as shown in fig. 1(d), the voltage output terminal of the starter motor is connected to the igniter start interlock device, the igniter start interlock device outputs a start state signal of the starter motor, and the first electronic switch K1 or the second electronic switch K2 is controlled to be turned off according to the start state signal.
In the present embodiment, the inverter is a three-phase PWM converter, and includes a switch tube assembly, and preferably specifically includes switch tubes Q1, Q2, Q3, Q4, Q5, and Q6 connected in series-parallel with each other, wherein input terminals of the switch tubes Q1, Q3, and Q5 are respectively connected to the battery, and output terminals of the switch tubes Q1 and Q2, Q3 and Q4, and Q5 and Q6 are respectively used as three-phase alternating current output terminals U0、V0、W0Is connected with the starting motor through a second electronic switch K2; please note thatAs further shown in fig. 1(c), the MCU controller sends PWM1, PWM2, PWM3, PWM4, PWM5 and PWM6 to the switching tubes Q1, Q2, Q3, Q4, Q5 and Q6 through the switching tube Driver to drive the switching tube assemblies; in other embodiments of the present invention, other hardware in the prior art may also be adopted as the inverter of the present invention, the number of output ac phases of the inverter is determined according to the requirements of the sensorless permanent magnet synchronous motor in practical application, and may also be single-phase ac output or two-phase ac output, typically, three-phase ac output, and those skilled in the art may substitute or replace specific embodiments on the basis of the present invention, which all fall within the protection scope of the present invention;
preferably, referring to fig. 2, in the present embodiment, the igniter start interlock device includes voltage dividing resistors R1, R2, R3 and a comparator 10, wherein a three-phase voltage output U of the starter motori、Vi、WiThe voltage of any two phases is connected to the input end of the comparator 10 through voltage dividing resistors R1, R2 and R3, and the output end of the comparator 10 outputs a starting state signal.
The control method of the engine igniter start interlock control system of the embodiment comprises the following operation steps:
A10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
A20) determining an engine start request rotational speed threshold value based on the corresponding relation between the start state signal and the engine rotational speed in the step A10);
A30) when the MCU controller judges that the engine speed corresponding to the starting state signal reaches the engine starting requirement speed threshold value in the step A20), the MCU controller outputs a starting switch signal to control the disconnection of the first electronic switch K1 or the second electronic switch K2;
finally, the embodiment 1 realizes accurate and reliable control of the starting interlock of the engine igniter.
Example 2:
the rest of this embodiment 2 is the same as embodiment 1 except that please refer to FIG. 3In the embodiment 2, the igniter start interlock device comprises an uncontrolled rectifier 20, a voltage dividing resistor and a differential amplifier 21 which are electrically connected in sequence, wherein the three-phase voltage output end U of the starting motori、Vi、WiThe uncontrolled rectifier 20 is connected, and particularly preferably, in the present embodiment, the uncontrolled rectifier 20 is a rectifier diode device; the uncontrolled rectifier 20 is connected with a filter capacitor C2 in parallel; the output end of the differential amplifier 21 outputs a start-up state signal;
embodiment 2 the control method of the engine igniter start interlock control system as described above includes the following steps:
B10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
B20) determining an activation state signal threshold corresponding to the engine activation requesting rotational speed threshold based on the correspondence between the activation state signal and the engine rotational speed of step B10);
B30) and when the starting state signal reaches the starting state signal threshold value of the step B20), controlling the first electronic switch K1 or the second electronic switch K2 to be switched off through a hardware control circuit.
The hardware control circuit in embodiment 2 may be any switching hardware control circuit in the prior art, and preferably includes a switching tube, a diode, and other devices.
Example 3:
the rest of this embodiment 3 is the same as the embodiment 1 except that, referring to fig. 4, in this embodiment 3, the igniter start interlock device includes an uncontrolled rectifier 30 and an electromagnetic switch 31 electrically connected to each other, wherein the three-phase voltage output terminal U of the starter motori、Vi、WiThe uncontrolled rectifier 30 is connected, and particularly preferably, in the present embodiment, the uncontrolled rectifier 30 adopts a rectifying diode device; the uncontrolled rectifier 30 is connected with a filter capacitor C3 in parallel; the state change of whether or not the electromagnetic switch 31 is closed is regarded as the starting stateA signal.
Embodiment 3 the control method of the engine igniter start interlock control system as described above, includes the steps of:
C10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the direct current voltage output by the uncontrolled rectifier 30, and obtains the corresponding relation between the direct current voltage and the rotating speed of the engine;
C20) determining a direct-current voltage threshold value corresponding to the engine start request rotational speed threshold value based on the corresponding relation between the direct-current voltage and the engine rotational speed in the step C10);
C30) when the direct current voltage reaches the direct current voltage threshold value of the step C20), the electromagnetic switch 31 is closed, and the hardware control circuit controls the first electronic switch K1 or the second electronic switch K2 to be opened.
The hardware control circuit of this embodiment 3 may be any switching hardware control circuit in the prior art, and preferably includes a switching tube, a diode, and other devices.
Example 4:
the present embodiment 4 is otherwise the same as the embodiment 1, except that in the present embodiment 4, the control method of the engine igniter start interlock control system includes the steps of:
A10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
A20) determining an engine start request rotational speed threshold value based on the corresponding relation between the start state signal and the engine rotational speed in the step A10);
A30) and when the MCU controller judges that the engine speed corresponding to the starting state signal reaches the engine starting requirement speed threshold value in the step A20), the MCU controller outputs a starting switch signal to control the first electronic switch K1 or the second electronic switch K2 to be switched off.
Example 5:
the present embodiment 5 is otherwise the same as embodiment 2, except that in this embodiment 5, the control method of the engine igniter start interlock control system includes the steps of:
B10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
B20) determining an activation state signal threshold corresponding to the engine activation requesting rotational speed threshold based on the correspondence between the activation state signal and the engine rotational speed of step B10);
B30) and when the starting state signal reaches the starting state signal threshold value of the step B20), controlling the first electronic switch K1 or the second electronic switch K2 to be switched off through a hardware control circuit.
Example 6:
the present embodiment 6 is otherwise the same as the embodiment 3, except that in the present embodiment 6, the control method of the engine igniter start interlock control system includes the steps of:
C10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the direct current voltage output by the uncontrolled rectifier 30, and obtains the corresponding relation between the direct current voltage and the rotating speed of the engine;
C20) determining a direct-current voltage threshold value corresponding to the engine start request rotational speed threshold value based on the corresponding relation between the direct-current voltage and the engine rotational speed in the step C10);
c30'), when the direct current voltage reaches the direct current voltage threshold value of the step C20), the electromagnetic switch 31 is closed, and the MCU controller outputs a start switch signal to control the opening of the first electronic switch K1 or the second electronic switch K2.
Example 7:
this embodiment 7 is otherwise the same as embodiment 2 or embodiment 3 or embodiment 5 or embodiment 6, except that in this embodiment 7, the three-phase voltage output terminal U of the starter motor is providedi、Vi、WiEither phase of which is connected to the uncontrolled rectifier 20 or the uncontrolled rectifier 30.
In specific implementation, after whether the judgment of the relevant threshold is achieved or not is finished, the MCU controller can output a starting switch signal to disconnect the first electronic switch K1 or the second electronic switch K2, and can also disconnect the first electronic switch K1 or the second electronic switch K2 through a hardware control circuit, and the specific implementation can be selected according to actual conditions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The starting interlocking control system of the engine igniter is characterized by comprising a storage battery, an inverter, a starting motor and an MCU (microprogrammed control unit) controller, wherein the storage battery, the inverter and the starting motor are electrically connected with each other; wherein the content of the first and second substances,
the starting motor is a sensorless permanent magnet synchronous motor;
a first electronic switch is connected between the storage battery and the inverter and/or a second electronic switch is connected between the inverter and the starting motor;
the voltage output end of the starting motor is connected with an igniter starting interlocking device, the igniter starting interlocking device outputs a starting state signal of the starting motor, and the first electronic switch and/or the second electronic switch is/are controlled to be switched off or not according to the starting state signal;
the igniter starting interlocking device comprises a divider resistor and a comparator, wherein any two-phase voltage at the voltage output end of the starting motor is connected to the input end of the comparator through the divider resistor, and the output end of the comparator outputs the starting state signal;
or the igniter starting interlocking device comprises an uncontrolled rectifier, a divider resistor and a differential amplifier which are sequentially and electrically connected, wherein the voltage output end of the starting motor is connected to the uncontrolled rectifier, and the output end of the differential amplifier outputs the starting state signal;
or the igniter starting interlocking device comprises an uncontrolled rectifier and an electromagnetic switch which are electrically connected with each other, wherein the voltage output end of the starting motor is connected to the uncontrolled rectifier, and the state change of whether the electromagnetic switch is closed is used as the starting state signal.
2. The engine igniter start interlock control system of claim 1 wherein the inverter includes a switching tube assembly, the MCU controller driving the switching tube assembly via a switching tube driver, the switching tube assembly having an input connected to the battery and an output connected to the starter motor via the second electronic switch.
3. The engine igniter start interlock control system of claim 1 wherein said uncontrolled rectifier comprises a rectifier diode device.
4. The engine igniter start interlock control system of claim 1 wherein the uncontrolled rectifier is connected in parallel with a filter capacitor.
5. A method of controlling an engine igniter start interlock control system as set forth in claim 1, wherein the operating steps include:
A10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
A20) determining an engine start request rotational speed threshold value based on the corresponding relation between the start state signal and the engine rotational speed in the step A10);
A30) and when the MCU controller judges that the engine speed corresponding to the starting state signal reaches the engine starting requirement speed threshold value in the step A20), the MCU controller controls the first electronic switch and/or the second electronic switch to be switched off.
6. A method of controlling an engine igniter start interlock control system as set forth in claim 1, wherein the operating steps include:
B10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the starting state signal of the starting motor to obtain the corresponding relation between the starting state signal and the rotating speed of the engine;
B20) determining an activation state signal threshold corresponding to the engine activation requesting rotational speed threshold based on the correspondence between the activation state signal and the engine rotational speed of step B10);
B30) and when the starting state signal reaches the starting state signal threshold value of the step B20), controlling the first electronic switch and/or the second electronic switch to be switched off through an MCU controller or a hardware control circuit.
7. A method of controlling an engine igniter start interlock control system as set forth in claim 1, wherein the operating steps include:
C10) the MCU controller judges the change of the rotating speed of the engine in advance according to the change of the direct current voltage output by the uncontrolled rectifier, and obtains the corresponding relation between the direct current voltage and the rotating speed of the engine;
C20) determining a direct-current voltage threshold value corresponding to the engine start request rotational speed threshold value based on the corresponding relation between the direct-current voltage and the engine rotational speed in the step C10);
C30) and when the direct current voltage reaches the direct current voltage threshold value of the step C20), the electromagnetic switch is closed, and the MCU controller or the hardware control circuit controls the disconnection of the first electronic switch and/or the second electronic switch.
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| EP1253698A2 (en) * | 2001-04-25 | 2002-10-30 | Hitachi, Ltd. | Power supply equipment for motor vehicle |
| CN101535611A (en) * | 2006-11-15 | 2009-09-16 | 三菱电机株式会社 | Hybrid engine assist system for vehicle |
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