Automobile and active vibration damping control method and device thereof
阅读说明：本技术 汽车及其主动减振控制方法和装置 (Automobile and active vibration damping control method and device thereof ) 是由 陈然 吴圣 于 2018-06-29 设计创作，主要内容包括：本发明公开了一种汽车及其主动减振控制方法和装置,所述方法包括以下步骤：通过发动机下一时刻的供油量计算发动机的振动大小,并通过发动机的曲轴角度计算发动机的转速和振动周期；根据振动大小、转速和振动周期获取目标电流输出波形；获取发动机的点火线圈信号；根据点火线圈信号判断发动机是否处于点火状态；如果是,则根据目标电流输出波形和点火线圈信号输出带有工作时刻的驱动信号至驱动电路；驱动电路根据驱动信号向作动器输出带有作用时间的工作电流,作动器根据工作电流进行工作以对汽车进行主动减振控制。从而实现汽车的主动减振控制,具有较高的时效性和有效性,而且运用点火线圈信号直接获取减振降噪的有效时刻,减振效果更有效。(The invention discloses an automobile and an active vibration damping control method and device thereof, wherein the method comprises the following steps: calculating the vibration of the engine according to the oil supply quantity at the next moment of the engine, and calculating the rotating speed and the vibration period of the engine according to the crankshaft angle of the engine; acquiring a target current output waveform according to the vibration magnitude, the rotating speed and the vibration period; acquiring an ignition coil signal of an engine; judging whether the engine is in an ignition state or not according to the ignition coil signal; if yes, outputting a driving signal with working time to a driving circuit according to the target current output waveform and the ignition coil signal; the driving circuit outputs working current with action time to the actuator according to the driving signal, and the actuator works according to the working current to carry out active vibration reduction control on the automobile. Therefore, active vibration damping control of the automobile is achieved, high timeliness and effectiveness are achieved, effective time for vibration damping and noise reduction is directly obtained by using ignition coil signals, and vibration damping effect is more effective.)
1. An active vibration damping control method of an automobile is characterized by comprising the following steps:
s1, calculating the vibration of the engine by obtaining the oil supply amount of the engine at the next moment, and calculating the rotating speed and the vibration period of the engine by detecting the crank angle of the engine;
s2, acquiring a target current output waveform according to the vibration size, the rotating speed and the vibration period;
s3, acquiring an ignition coil signal of the engine;
s4, judging whether the engine is in an ignition state according to the ignition coil signal of the engine;
s5, if the engine is in the ignition state, outputting a driving signal with working time to a driving circuit for driving an actuator to work according to the target current output waveform and an ignition coil signal of the engine;
and S6, the driving circuit outputs working current with action time to the actuator according to the driving signal, and the actuator works according to the working current with action time to perform active vibration damping control on the automobile.
2. The active vibration damping control method of an automobile according to claim 1, characterized in that the fuel supply amount at the next timing of the engine is acquired by communicating with an electronic control unit of the engine.
3. The active vibration damping control method of an automobile according to claim 1, wherein an amount of oil supply at a next time of the engine is obtained by obtaining an intake pressure and a throttle opening of the engine.
4. The active vibration damping control method of an automobile according to claim 1, wherein when it is judged that the engine is not in an ignition state according to an ignition coil signal of the engine, a timer is further counted, and when the counted time reaches a preset time, if the engine is not in an ignition state yet, the execution of steps S1-S4 is returned.
5. The active vibration damping control method of an automobile according to any one of claims 1 to 4, characterized by further comprising:
detecting the output current of the driving circuit to obtain the working temperature of the actuator;
and correcting the target current output waveform according to the working temperature of the actuator.
6. The active vibration damping control method of an automobile according to any one of claims 1 to 4, characterized by further comprising:
detecting the acceleration of the automobile through an acceleration sensor to obtain vibration information of the automobile;
judging whether the current vibration value of the automobile is larger than a preset vibration threshold value or not according to the vibration information of the automobile;
and if the current vibration value of the automobile is larger than the preset vibration threshold value, correcting the target current output waveform so that the actuator can adjust the dynamic stiffness of an active suspension system of the automobile according to the corrected target current output waveform to perform active vibration reduction control on the automobile.
7. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the method of active vibration damping control of a vehicle according to any one of claims 1-6.
8. An active damping control device for an automobile, comprising:
the vibration state estimation module is used for calculating the vibration of the engine according to the oil supply quantity of the engine at the next moment, and calculating the rotating speed and the vibration period of the engine according to the crankshaft angle of the engine;
the target current obtaining module is used for obtaining a target current output waveform according to the vibration magnitude, the rotating speed and the vibration period;
the ignition coil signal acquisition module is used for acquiring an ignition coil signal of the engine;
the first judgment module is used for judging whether the engine is in an ignition state or not according to an ignition coil signal of the engine;
the driving control module is used for outputting a driving signal with working time to the driving circuit according to the target current output waveform and an ignition coil signal of the engine when the engine is in an ignition state, and the driving circuit outputs a working current with action time to an actuator according to the driving signal, so that the actuator works according to the working current with action time to carry out active vibration damping control on the automobile.
9. The active vibration damping control device of an automobile according to claim 8, wherein the vibration state estimation module is further configured to communicate with an electronic control unit of the engine to acquire an oil supply amount at a next timing of the engine.
10. The active vibration damping control device of an automobile according to claim 8, wherein the vibration state estimation module is further configured to acquire an intake pressure and a throttle opening degree of the engine, and acquire an oil supply amount at the next time of the engine based on the intake pressure and the throttle opening degree.
11. The active vibration damping control device of an automobile according to claim 8, wherein the first judging module is further configured to count time by a timer when it is judged that the engine is not in an ignition state based on an ignition coil signal of the engine, and the vibration state estimating module recalculates a vibration magnitude, a rotation speed and a vibration period of the engine if the engine is not in the ignition state when the counted time reaches a preset time.
12. The active vibration damping control device for an automobile according to any one of claims 8 to 11, further comprising:
the current detection module is used for detecting the output current of the driving circuit so as to obtain the working temperature of the actuator;
and the target current correction module is used for correcting the target current output waveform according to the working temperature of the actuator.
13. The active vibration damping control device for an automobile according to any one of claims 8 to 11, further comprising:
the second judgment module is used for detecting the acceleration of the automobile through an acceleration sensor to obtain vibration information of the automobile, judging whether the current vibration value of the automobile is larger than a preset vibration threshold value or not according to the vibration information of the automobile, and correcting the target current output waveform through the target current correction module when the current vibration value of the automobile is larger than the preset vibration threshold value, so that the actuator can adjust the dynamic stiffness of an active suspension system of the automobile according to the corrected target current output waveform to perform active vibration reduction control on the automobile.
14. A motor vehicle, characterized by comprising an active vibration damping control apparatus of a motor vehicle according to any one of claims 8 to 13.
Technical Field
The invention relates to the technical field of automobiles, in particular to an active vibration damping control method of an automobile, an active vibration damping control device of the automobile and the automobile with the device.
Background
With the progress of social technology, people have higher and higher requirements on comfort, and riding comfort becomes an important index for measuring the performance of automobiles, wherein the main factor influencing the riding comfort is automobile vibration, the reasons for the automobile vibration are many, and the engine vibration is one of the main reasons to be considered. The engine vibration is mainly caused by combustion in an engine cylinder and reciprocating motion of a piston, and the vibration is transmitted to a frame through an engine suspension system and further transmitted into a cab, so that the riding comfort is influenced.
In order to improve the riding comfort, a reasonable suspension system is required to achieve the purpose of damping vibration. The development of the suspension system mainly goes through the processes of rubber suspension, hydraulic suspension and active suspension, wherein the rubber suspension has poor high and low temperature resistance and is not oil-resistant due to the influence of the material of the rubber suspension; the hydraulic suspension can generate a dynamic liquefaction phenomenon under high frequency; the dynamic response of the semi-active suspension is sensitive to structural parameters, and strict design requirements and manufacturing processes are required. Therefore, research into the active mount needs to be increased.
Disclosure of Invention
The present application is made based on the recognition and study of the following problems by the inventors:
Drawings
FIG. 1 is a flow chart of an active damping control method of a vehicle according to an embodiment of the present invention;
FIG. 2 is a graph of an ignition coil signal versus a target current output waveform for a four cylinder engine in accordance with one embodiment of the present invention;
FIG. 3 is a flow chart of an active damping control method of a vehicle according to one embodiment of the present invention;
FIG. 4 is a block schematic diagram of an active damping control device of a vehicle according to an embodiment of the present invention;
FIG. 5 is a block schematic diagram of an active damping control device of a vehicle according to one embodiment of the present invention;
FIG. 6 is a block schematic diagram of an automobile according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An active vibration damping control method of a vehicle, a non-transitory computer-readable storage medium, an active vibration damping control apparatus of a vehicle, and a vehicle having the same, according to embodiments of the present invention, are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of an active vibration damping control method of an automobile according to an embodiment of the present invention. As shown in fig. 1, the active vibration damping control method of the vehicle may include the steps of:
and S1, calculating the vibration of the engine by acquiring the oil supply amount at the next moment of the engine, and calculating the rotating speed and the vibration period of the engine by detecting the crank angle of the engine.
According to one embodiment of the invention, the oil supply amount at the next moment of the engine is obtained by communicating with an electronic control unit of the engine.
According to another embodiment of the invention, the oil supply amount at the next moment of the engine is obtained by obtaining the intake pressure and the throttle opening of the engine.
Specifically, the size of the oil supply to the engine at the next time, i.e., the oil supply amount, may be obtained by communicating with an electronic control unit of the engine, or the size of the oil supply to the engine at the next time, i.e., the oil supply amount, may be calculated by obtaining an intake pressure sensor signal of the engine, obtaining an intake pressure of the engine, obtaining a throttle opening degree sensor signal, and calculating the size of the oil supply to the engine at the next time, i.e., the oil supply amount, based on the intake pressure and the throttle opening degree. After the oil supply amount at the next time of the engine is obtained, the vibration magnitude of the engine at the next time is calculated according to the obtained oil supply amount.
Meanwhile, the crankshaft angle of the engine can be obtained through the signal waveform output by the crankshaft sensor, and the rotating speed and the vibration period of the engine can be further calculated according to the crankshaft angle. The rotation speed of the engine is equal to the number of revolutions of a crankshaft per minute, and the vibration period of the engine can be obtained by calculation according to the number of cylinders of the engine and the rotation speed of the engine. Taking a four-cylinder engine as an example, the crankshaft rotates twice in each working cycle of the engine, and in each working cycle, the four cylinders are ignited and exploded once respectively according to the sequence of 1342, namely, the engine is exploded twice per revolution, namely, the engine vibrates twice per revolution, and if the rotating speed of the engine is 6000r/min, the vibration period of the engine is 1/200 s.
And S2, acquiring a target current output waveform according to the vibration size, the rotation speed and the vibration period.
Specifically, after calculating the vibration magnitude, the rotation speed, and the vibration period of the engine, a sampling lookup table (i.e., a lookup table) may be used to obtain the target current output waveform at the current time. The duty ratio of the target current output waveform can be obtained through a sampling table look-up method according to the vibration of the engine, the frequency of the target current output waveform is obtained through the sampling table look-up method according to the rotating speed and the vibration period of the engine, and then the target current output waveform is obtained according to the duty ratio and the frequency and corresponds to the required target current value.
And S3, acquiring an ignition coil signal of the engine.
And S4, judging whether the engine is in an ignition state or not according to the ignition coil signal of the engine.
And S5, if the engine is in the ignition state, outputting a driving signal with working time to a driving circuit for driving the actuator to work according to the target current output waveform and the ignition coil signal of the engine.
According to one embodiment of the present invention, when it is judged that the engine is not in the ignition state according to the ignition coil signal of the engine, the counting is further performed by a timer, and when the counted time reaches a preset time, if the engine is not in the ignition state yet, the execution of steps S1-S4 is returned. The preset time can be calibrated according to actual conditions.
Specifically, the ignition coil signal reflects the explosion time of a cylinder in the engine, and the vibration of the engine is mainly generated when gas in the cylinder is burned to push a piston at the ignition time, so that the ignition coil signal is used to control the output time of a target current output waveform, namely, a target current value, and the vibration suppression is more accurate and effective.
In practical application, the ignition coil signal of the engine can be obtained by communicating with an electronic control unit of the engine, and whether the engine is in an ignition state at the moment is judged according to the ignition coil signal. If the engine is not in the ignition state, entering a waiting state, starting timing by a timer, judging whether the timing time exceeds the specified time, and if so, repeatedly executing the steps S1-S4; if the predetermined time is not exceeded, step S4 is repeated. If the engine is in the ignition state, the driving signal with the working moment is output to the driving circuit according to the target current output waveform and the ignition coil signal.
For example, a pulse control signal for driving may be generated based on the ignition coil signal, and the time for inputting the target current value to the actuator may be determined by the pulse control signal. When the target current value is input to the actuator, the actuator adjusts the electromagnetic induction device according to the working current to realize the up-and-down motion of the mechanical structure, so that the damping and dynamic stiffness of the active suspension are changed, the vibration and noise reduction functions of the automobile are realized, and the riding comfort of a user is improved.
Take a four-cylinder engine as an example. FIG. 2 is a graph of an ignition coil signal versus a target current output waveform for a four cylinder engine in accordance with one embodiment of the present invention. Wherein, curve 2 represents a diagram of an ignition coil signal of an engine, curve 1 represents a diagram of a waveform of a PWM signal required to generate a target current value, d1 represents a diagram of a waveform of a PWM signal required to generate a target current value before correction, d2 represents a diagram of a PWM signal required to generate a target current value after correction, a and a1 represent a start phase difference before and after correction, b and b1 represent a time length of a high level signal before and after correction, and c1 represent a time length of one signal period before and after correction, and duty ratios thereof are b/c and b1/c1, respectively. As can be seen from fig. 2, the target current value is output after a time a after the ignition of the ignition coil, thereby making the effect of vibration and noise reduction more effective.
And S6, the driving circuit outputs working current with action time to the actuator according to the driving signal, and the actuator works according to the working current with action time to carry out active vibration damping control on the automobile.
According to the active vibration damping control method of the automobile, signals of an electronic control unit of the engine or signals of a throttle opening sensor and an engine air inlet pressure sensor, signals of a crankshaft sensor, an ignition coil sensor and the like which are already existed in the automobile are used as input signals of vibration damping control, and additional sensors are not needed. The method comprises the steps of obtaining the oil supply size of an engine at the next moment directly through communication with an electronic control unit of the engine, or calculating the oil supply size of the engine at the next moment through a throttle opening sensor signal and an engine air inlet pressure sensor signal, then calculating the vibration size of the engine at the next moment according to the oil supply size, further selecting the currently required duty ratio, simultaneously calculating the rotating speed and the vibration period of the engine through a crankshaft sensor signal, selecting the currently required frequency according to the rotating speed and the vibration period, further obtaining a target current output waveform according to the required duty ratio and frequency, and performing active vibration reduction control on the automobile according to the waveform. Meanwhile, the effective time of vibration and noise reduction control is directly acquired by using an ignition coil sensor signal, so that the action time of vibration reduction control is more accurate, and the vibration reduction effect is more effective.
In addition, in practical application, since temperature affects the vibration damping effect of the actuator, in order to achieve a better vibration damping effect, the operating temperature of the actuator is monitored, and the target current output waveform, i.e., the target current value, is adjusted according to the operating temperature.
According to an embodiment of the present invention, the active vibration damping control method for a vehicle further includes: detecting the output current of the driving circuit to obtain the working temperature of the actuator; and correcting the target current output waveform according to the working temperature of the actuator.
Specifically, since the resistance of the coil in the driving circuit increases with the increase of the temperature, the output current of the driving circuit can be used to calculate the resistance value of the coil, then calculate the operating temperature of the actuator at that time according to the resistance value, finally calculate the operating state of the actuator according to the operating temperature, adjust the target current output waveform (e.g., the duty ratio of the target current output waveform) according to the operating state, and adjust the dynamic stiffness of the active suspension according to the adjusted target current output waveform. Therefore, before the vibration reduction effect is not generated, the target current output waveform at each moment is adjusted by monitoring the working temperature of the actuator, the influence of the temperature on the actuator is eliminated, the purpose of actively adjusting the vibration reduction effect is achieved, and the vibration reduction effect is better.
After the dynamic stiffness of the active mount is adjusted, if the vibration reduction effect is not monitored, whether the vibration reduction is effective or not and what vibration reduction effect the vibration reduction effect is, if the vibration reduction effect can be monitored, and the target current output waveform of the next period is adjusted according to the current vibration reduction effect, the obtained target current output waveform, namely the target current value, is more reasonable, and the vibration reduction effect is better.
According to an embodiment of the present invention, the active vibration damping control method for a vehicle further includes: detecting the acceleration of the automobile through an acceleration sensor to obtain vibration information of the automobile; judging whether the current vibration value of the automobile is larger than a preset vibration threshold value or not according to the vibration information of the automobile; and if the current vibration value of the automobile is larger than the preset vibration threshold value, correcting the target current output waveform so that the actuator adjusts the dynamic stiffness of an active suspension system of the automobile according to the corrected target current output waveform to perform active vibration reduction control on the automobile. The preset vibration threshold value can be calibrated according to actual conditions.
Specifically, after the dynamic stiffness of the active suspension is adjusted, the current vibration value of the automobile is calculated through the signal waveform of the acceleration sensor, and then the current vibration value is compared with a preset vibration threshold value. If the vibration value is larger than the preset vibration threshold value, the vibration reduction effect is not good, at the moment, a target current correction signal (such as a target duty ratio correction signal) is output according to the difference value between the vibration value and the preset vibration threshold value, a target current output waveform (such as the duty ratio of the target current output waveform) is corrected according to the target current correction signal, and then the dynamic stiffness of the active suspension is adjusted according to the corrected target current output waveform.
That is, after the target current output waveform is input to the driving circuit, the vibration damping effect is monitored by the acceleration sensor, and feedback is given to the situation that the vibration damping effect cannot be satisfied, so that the target current value which is the target current output waveform is corrected to form closed-loop adjustment, and the effectiveness of the vibration damping effect is ensured. And when the two correction modes act in a synergistic manner, the vibration damping effect is more obvious, and the riding comfort can be greatly improved.
To make the present invention more apparent to those skilled in the art, fig. 3 is a flowchart of an active vibration damping control method of a vehicle according to an embodiment of the present invention. As shown in fig. 3, the active vibration damping control method of the vehicle may include the steps of:
and S101, communicating with an electronic control unit of the engine, or acquiring the air inlet pressure and the throttle opening of the engine.
And S102, acquiring the oil supply amount of the engine at the next moment.
And S103, calculating the rotating speed and the vibration period of the engine according to the crank angle of the engine.
And S104, sampling a table look-up method to obtain a target current output waveform.
And S105, acquiring an ignition coil signal.
S106, judging whether the ignition coil is ON or not. If yes, go to step S107; if not, step S108 is performed.
S107, the target current output waveform is output to the drive circuit.
S108, judging whether the timing signal is ON. If yes, returning to the step S101; if not, return to step S106.
And S109, detecting the working current of the driving circuit.
And S110, adjusting the target current output waveform according to the working current.
And S111, acquiring a signal waveform of the acceleration sensor.
And S112, judging whether the vibration reduction effect meets the condition. If yes, ending; if not, step S113 is performed.
S113, the target current output waveform is adjusted.
In the embodiment, the signals of the electronic control unit of the engine, the throttle opening sensor signal, the engine intake pressure sensor signal, the crankshaft sensor signal, the ignition coil sensor signal and other signals existing in the automobile are used as the input signals of the vibration damping control, and the signal collection is more convenient and effective. And, the effective moment of vibration damping and noise reduction control is directly obtained by using ignition coil sensor signals, so that the action time of vibration damping control is more accurate, and the vibration damping effect is more effective. Meanwhile, the working current of the driving circuit is used as an input signal, the target current output waveform, namely the target current value, is actively adjusted, the signal of the acceleration sensor is used as a feedback signal, and the target current output waveform, namely the target current value, is subjected to closed-loop adjustment, so that the signal processing is more rigorous and effective, the vibration and noise reduction control can be better realized, the effects of vibration attenuation and noise reduction are achieved, and the comfort level of a user is improved.
According to the active vibration damping control method of the automobile, the vibration magnitude of the engine is calculated by obtaining the oil supply amount of the engine at the next moment, the rotating speed and the vibration period of the engine are calculated by detecting the crank angle of the engine, and the target current output waveform is obtained according to the vibration magnitude, the rotating speed and the vibration period. And then, acquiring an ignition coil signal of the engine, and judging whether the engine is in an ignition state or not according to the ignition coil signal. If the automobile is in an ignition state, a driving signal with working time is output to a driving circuit according to a target current output waveform and an ignition coil signal, the driving circuit outputs working current with action time to an actuator according to the driving signal, and the actuator works according to the working current to perform active vibration reduction control on the automobile. The active vibration reduction control method can obtain the vibration of the engine, further carry out active vibration reduction control on the automobile according to the vibration, has higher timeliness and effectiveness, and directly obtains the effective moment of vibration reduction and noise reduction by using the ignition coil signal, so that the vibration reduction effect is more effective.
In addition, an embodiment of the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the above-mentioned active vibration damping control method for a vehicle.
According to the non-transitory computer readable storage medium of the embodiment of the invention, by the active vibration reduction control method of the automobile, the vibration magnitude of the engine can be obtained, and then the active vibration reduction control is performed on the automobile according to the vibration magnitude, so that the time effectiveness and the effectiveness are higher, and the effective time of vibration reduction and noise reduction is directly obtained by using the ignition coil signal, so that the vibration reduction effect is more effective.
Fig. 4 is a block schematic diagram of an active damping control apparatus of an automobile according to an embodiment of the present invention. As shown in fig. 4, the active vibration damping control apparatus of the automobile includes: the device comprises a vibration state estimation module 11, a target
The vibration state estimation module 11 is configured to calculate a vibration magnitude of the engine according to an oil supply amount of the engine at a next time, and calculate a rotation speed and a vibration period of the engine according to a crank angle of the engine; the target current obtaining
According to one embodiment of the invention, the vibration state estimation module 11 is further configured to communicate with an electronic control unit of the engine to obtain an oil supply amount at a next time of the engine.
According to another embodiment of the invention, the vibration state estimation module 11 is further configured to obtain an intake pressure and a throttle opening of the engine, and obtain an oil supply amount of the engine at a next time according to the intake pressure and the throttle opening.
According to an embodiment of the present invention, the first determining
According to an embodiment of the present invention, as shown in fig. 5, the active vibration damping control apparatus for a vehicle described above may further include: a
According to an embodiment of the present invention, as shown in fig. 5, the active vibration damping control apparatus for a vehicle described above may further include: the second judging
It should be noted that details that are not disclosed in the active vibration damping control device of the vehicle according to the embodiment of the present invention are referred to details that are disclosed in the active vibration damping control method of the vehicle according to the embodiment of the present invention, and detailed description thereof is omitted here.
According to the active vibration damping control device of the automobile, the vibration state estimation module calculates the vibration magnitude of the engine according to the oil supply quantity of the engine at the next moment, the rotating speed and the vibration period of the engine are calculated according to the crank angle of the engine, the target current obtaining module obtains the target current output waveform according to the vibration magnitude, the rotating speed and the vibration period, and the ignition coil signal obtaining module obtains the ignition coil signal of the engine. The first judgment module judges whether the engine is in an ignition state or not according to the ignition coil signal, the drive control module outputs a drive signal with working time to the drive circuit according to a target current output waveform and the ignition coil signal when the engine is in the ignition state, and the drive circuit outputs working current with action time to the actuator according to the drive signal, so that the actuator works according to the working current with the action time to carry out active vibration reduction control on the automobile. This initiative damping control device can obtain the vibration size of engine, and then carries out initiative damping control to the car according to the vibration size, has higher ageing and validity, and the effective moment of making an uproar falls in the direct acquisition damping of application ignition coil signal moreover, and the damping effect is more effective.
FIG. 6 is a block schematic diagram of an automobile according to an embodiment of the invention. As shown in fig. 6, the
According to the automobile provided by the embodiment of the invention, the vibration of the engine can be obtained through the active vibration reduction control device of the automobile, the active vibration reduction control is carried out on the automobile according to the vibration, the timeliness and the effectiveness are higher, the effective time of vibration reduction and noise reduction is directly obtained by using the ignition coil signal, and the vibration reduction effect is more effective.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In addition, in the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
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