CN108327504B - Automobile and active vibration damping control method and device thereof - Google Patents
Automobile and active vibration damping control method and device thereof Download PDFInfo
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- CN108327504B CN108327504B CN201710042594.6A CN201710042594A CN108327504B CN 108327504 B CN108327504 B CN 108327504B CN 201710042594 A CN201710042594 A CN 201710042594A CN 108327504 B CN108327504 B CN 108327504B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
- B60K5/1283—Adjustable supports, e.g. the mounting or the characteristics being adjustable
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- Automation & Control Theory (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an automobile and an active vibration damping control method and device thereof, wherein the method comprises the following steps: when the automobile is in an idling working condition, calculating the rotating speed and the vibration period of the engine through the crankshaft angle of the engine, calculating the vibration state of the engine, and calculating a target current value according to the vibration state; 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 value 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 so as to carry out active vibration damping control on the automobile. Therefore, active vibration reduction control of the automobile under the idle working condition is realized, high timeliness is achieved, the ignition coil signal is used for directly obtaining the effective moment of vibration reduction and noise reduction, the action time of vibration reduction control is more accurate, and the vibration reduction effect is more effective.
Description
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:
in the related art, there is provided a vibration-proof control algorithm that estimates a vibration state of the 1 st cycle of engine vibration based on an output of a sensor that detects engine rotation fluctuation, calculates a cycle length and a target current value waveform, and samples the target current value waveform at a constant sampling cycle to obtain a data set of the target current value. When the target current value is outputted to the drive section, the cycle length of the 3 rd cycle of the engine vibration is estimated based on the predetermined number of crank pulse intervals, and the data set of the obtained target current value is corrected accordingly.
The inventor finds that: the control algorithm estimates the vibration state, the target current value and the like of the 3 rd period according to the vibration state, the target current value and the like of the 1 st period of the engine vibration, so that the control algorithm has no timeliness, cannot realize real-time adjustment of the vibration, and does not provide a vibration damping control algorithm under an idle working condition.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one objective of the present invention is to provide an active vibration damping control method for an automobile, which can realize active vibration damping control of the automobile under an idle condition, and has high timeliness, and the ignition coil signal is used to directly obtain the effective time of vibration damping and noise reduction, so that the action time of vibration damping control is more accurate, and the vibration damping effect is more effective.
Another object of the present invention is to provide an active vibration damping control method for a vehicle.
A further object of the invention is to provide a motor vehicle.
In order to achieve the above object, an embodiment of the invention provides an active vibration damping control method for an automobile, which includes the following steps: s1, when the automobile is in an idle working condition, the rotating speed and the vibration period of the engine are calculated by detecting the crank angle of the engine, the vibration state of the engine is estimated according to the rotating speed and the vibration period of the engine, and a target current value is calculated according to the vibration state of the engine; s2, acquiring an ignition coil signal of the engine; s3, judging whether the engine is in an ignition state according to the ignition coil signal of the engine; s4, 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 value and an ignition coil signal of the engine; and S5, 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.
According to the active vibration damping control method of the automobile, when the automobile is in an idling working condition, the rotating speed and the vibration period of the engine are calculated through the detected crank angle of the engine, the vibration state of the engine is calculated according to the rotating speed and the vibration period, and then the target current value is calculated according to the vibration state. And then, judging whether the engine is in an ignition state or not according to the ignition coil signal, if so, outputting a driving signal with working time to a driving circuit according to a target current value and the ignition coil signal, outputting a working current with action time to an actuator by the driving circuit according to the driving signal, and working the actuator according to the working current so as to perform active vibration damping control on the automobile. Therefore, active vibration reduction control of the automobile under the idle working condition is achieved, high timeliness is achieved, the ignition coil signal is used for directly obtaining the effective moment of vibration reduction and noise reduction, the action time of vibration reduction control is more accurate, and the vibration reduction effect is more effective.
According to an embodiment of the invention, before step S1, the vehicle speed of the automobile is also detected by a vehicle speed sensor to determine whether the automobile is in an idle condition.
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-S3 is returned.
According to an embodiment of the present invention, the active vibration damping control method for an automobile further includes: detecting the output current of the driving circuit to obtain the working temperature of the actuator; and adjusting the target current value according to the working temperature of the actuator.
According to an embodiment of the present invention, the active vibration damping control method for an automobile 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 a preset vibration threshold value, correcting the target current value so that the actuator can adjust the dynamic stiffness of the active suspension system of the automobile according to the corrected target current value to perform active vibration damping control on the automobile.
In order to achieve the above object, an active vibration damping control apparatus for a vehicle according to another embodiment of the present invention includes: the vibration period calculation module is used for calculating the rotating speed and the vibration period of the engine according to the angle of a crankshaft of the engine when the automobile is in an idling working condition; the vibration state estimation module is used for estimating the vibration state of the engine according to the rotating speed and the vibration period of the engine when the automobile is in an idling working condition; the target current operation module is used for calculating a target current value according to the vibration state of the engine; an acquisition module 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 value 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 perform active vibration damping control on the automobile.
According to the active vibration damping control device of the automobile, when the automobile is in an idling working condition, the rotating speed and the vibration period of the engine are calculated through the detected crank angle of the engine, the vibration state of the engine is calculated according to the rotating speed and the vibration period, and then the target current value is calculated according to the vibration state. And then, judging whether the engine is in an ignition state or not according to the ignition coil signal, if so, outputting a driving signal with working time to a driving circuit according to a target current value and the ignition coil signal, outputting a working current with action time to an actuator by the driving circuit according to the driving signal, and working the actuator according to the working current so as to perform active vibration damping control on the automobile. Therefore, active vibration reduction control of the automobile under the idle working condition is achieved, high timeliness is achieved, the ignition coil signal is used for directly obtaining the effective moment of vibration reduction and noise reduction, the action time of vibration reduction control is more accurate, and the vibration reduction effect is more effective.
According to an embodiment of the present invention, the active vibration damping control device for an automobile further includes: the second judgment module is used for detecting the speed of the automobile through a speed sensor so as to judge whether the automobile is in an idling working condition.
According to one embodiment of the invention, the first judging module is further configured to count time by a timer when the engine is judged not to be in the ignition state according to the ignition coil signal of the engine, and when the counted time reaches a preset time, if the engine is not in the ignition state, the second judging module is used for judging whether the automobile is in the idle working condition again.
According to an embodiment of the present invention, the active vibration damping control device for an automobile further includes: 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 adjusting the target current value according to the working temperature of the actuator.
According to an embodiment of the present invention, the active vibration damping control device for an automobile further includes: and the third judgment module is used for detecting the acceleration of the automobile through an acceleration sensor so as to acquire vibration information of the automobile, judging whether the current vibration value of the automobile is greater than a preset vibration threshold value or not according to the vibration information of the automobile, and correcting the target current value through the target current correction module when the current vibration value of the automobile is greater 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 value so as to perform active vibration reduction control on the automobile.
In order to achieve the above object, another embodiment of the present invention provides an automobile including the active vibration damping control device of the automobile.
According to the automobile provided by the embodiment of the invention, the active vibration damping control of the automobile under the idle working condition can be realized through the active vibration damping control device of the automobile, the timeliness is higher, and the effective vibration damping and noise reduction time is directly obtained by using the ignition coil signal, so that the action time of vibration damping control is more accurate, and the vibration damping effect is more effective.
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 ignition coil signal versus target current value for a four cylinder engine according to 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, an active vibration damping control apparatus of a vehicle, and a vehicle having the same according to embodiments of the present invention will be 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, when the automobile is in an idle working condition, calculating the rotating speed and the vibration period of the engine by detecting the crank angle of the engine, estimating the vibration state of the engine according to the rotating speed and the vibration period of the engine, and calculating the target current value according to the vibration state of the engine. The vibration state of the engine includes a vibration magnitude and a vibration frequency.
According to an embodiment of the invention, before step S1, the vehicle speed of the vehicle is also detected by a vehicle speed sensor to determine whether the vehicle is in an idle condition.
Specifically, there are many methods for determining whether the vehicle is in the idle state, for example, whether the vehicle is in the idle state may be determined according to a vehicle speed of the vehicle, an accelerator pedal signal, a position signal of a clutch, a position signal of a transmission, and the like.
When the automobile is judged to be in an idling working condition, the crankshaft angle of the engine is obtained through the signal waveform output by the crankshaft sensor, and then the rotating speed and the vibration period of the engine are 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.
After the rotating speed and the vibration period of the engine are calculated, the vibration state of the engine at the moment can be obtained by utilizing a sampling method or a table look-up method according to the rotating speed of the engine, and then the current required target current value A is obtained by utilizing the sampling method or the table look-up method according to the vibration state of the engine. In particular, it can be obtained by calculation using the prior art.
And S2, acquiring an ignition coil signal of the engine.
And S3, judging whether the engine is in an ignition state or not according to the ignition coil signal of the engine.
And S4, 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 value 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-S3 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 combusted to push a piston at the ignition time, so that the ignition coil signal is used for controlling the output time of the target current value A, and the vibration is more accurately and effectively suppressed.
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-S3; if the predetermined time is not exceeded, step S3 is repeated. And if the engine is in an ignition state at the moment, outputting a driving signal with working moment to a driving circuit according to the calculated target current value A and the ignition coil signal.
Specifically, the pulse width modulation control method may be used to obtain a corresponding driving signal according to the target current value a and the vibration period of the engine, and then generate a driving pulse control signal according to the ignition coil signal, and determine the time for inputting the target current value a to the actuator according to the pulse control signal. When the target current value A 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 the dynamic stiffness of the active suspension are changed, the vibration and noise reduction functions of the automobile under the idling working condition 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 ignition coil signal versus target current value for a four cylinder engine according to one embodiment of the present invention. Where q1 is the ignition coil signal for cylinder No. 1, q2 is the ignition coil signal for cylinder No. 3, q3 is the ignition coil signal for cylinder No. 4, q4 is the ignition coil signal for cylinder No. 2, E is the waveform of the target current value, and δ is the phase delay of the target current value. As can be seen from fig. 2, the target current value a is output after δ time after ignition of the ignition coil, thereby making the effect of vibration damping and noise reduction more effective.
And S5, 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 existing in the automobile, such as a crankshaft sensor and ignition coil signals, are used as input signals of vibration damping control to achieve active vibration damping control of the automobile under an idling working condition, and the method has the advantages of being high in timeliness, convenient to obtain signals and real. Meanwhile, the effective moment of vibration and noise reduction control is directly acquired by using an ignition coil 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, because the temperature can influence the vibration reduction effect of the actuator, in order to achieve a better vibration reduction effect, the working temperature of the actuator is monitored, and the target current value is adjusted according to the working 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 adjusting the target current value 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 working temperature of the actuator at that time according to the resistance value, finally calculate the working state of the actuator according to the working temperature, adjust the target current value a according to the working state, and adjust the dynamic stiffness of the active suspension according to the adjusted current value. Therefore, before the vibration reduction effect is not generated, the target current value 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 suspension is adjusted, if the vibration reduction effect is not monitored, whether the vibration reduction is effective or not and what vibration reduction effect is achieved cannot be judged, and if the vibration reduction effect can be monitored, the target current value of the next period is adjusted according to the current vibration reduction effect, the obtained 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 value so that the actuator can adjust the dynamic stiffness of the active suspension system of the automobile according to the corrected target current value 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, a target current correction signal is output according to the difference value between the vibration value and the preset vibration threshold value, the target current value 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 value.
That is, after the target current value is input into the driving circuit, the vibration damping effect is monitored by using the acceleration sensor, and the condition that the vibration damping effect cannot be met is fed back, so that the target current value is corrected, closed-loop adjustment is formed, 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:
s201, acquiring the speed of the automobile.
And S202, judging whether the automobile is in an idling working condition or not according to the speed of the automobile. If yes, go to step S203; if not, return to step S201.
And S203, calculating the rotating speed and the vibration period of the engine according to the crank angle of the engine.
And S204, obtaining the vibration state of the engine at the moment by using a sampling method according to the rotating speed of the engine, and further obtaining the current required target current value by using the sampling method according to the vibration state of the engine.
And S205, acquiring an ignition coil signal.
And S206, judging whether the ignition coil signal is ON or not, namely judging whether the engine is in an ignition state or not. If yes, go to step S208; if not, step S207 is performed.
S207, it is determined whether the timing signal is ON. If yes, returning to the step S201; if not, return to step S206.
And S208, controlling the duty ratio of the driving circuit to obtain the required target current value.
S209 inputs the target current value to the drive circuit.
S210, detecting the working current of the driving circuit.
And S211, adjusting the target current value according to the working current.
S212, a signal waveform of the acceleration sensor is acquired.
And S213, judging whether the vibration reduction effect meets the condition or not according to the signal waveform of the acceleration sensor. If yes, ending vibration reduction and noise reduction of the signal period; if not, step S214 is performed.
And S214, correcting the adjusted target current value according to the vibration reduction effect.
In the embodiment, the existing signals of the automobile such as the crankshaft sensor, the ignition coil signal and the vehicle speed sensor are used as the input signals of the vibration reduction control, and the signal acquisition is more convenient and effective. And, the ignition coil signal is used for directly obtaining the effective time of vibration reduction and noise reduction control, so that the action time of vibration reduction control is more accurate, and the vibration reduction effect is more effective. Meanwhile, the working current of the driving circuit is used as an input signal to actively adjust the target current value, the signal of the acceleration sensor is used as a feedback signal to adjust the target current value in a closed loop mode, so that the signal processing is more rigorous and effective, the vibration and noise reduction control can be better realized, the effects of attenuating vibration and reducing noise are achieved, and the comfort level of a user is improved.
In summary, according to the active vibration damping control method for the automobile of the embodiment of the invention, when the automobile is in the idle operating condition, the rotation speed and the vibration period of the engine are calculated according to the detected crank angle of the engine, the vibration state of the engine is calculated according to the rotation speed and the vibration period, and the target current value is calculated according to the vibration state. And then, judging whether the engine is in an ignition state or not according to the ignition coil signal, if so, outputting a driving signal with working time to a driving circuit according to a target current value and the ignition coil signal, outputting a working current with action time to an actuator by the driving circuit according to the driving signal, and working the actuator according to the working current so as to perform active vibration damping control on the automobile. Therefore, the active vibration damping control of the automobile under the idle working condition is realized, and the method has higher timeliness and better vibration damping effect.
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 period operation module 11, a vibration state presumption module 12, a target current operation module 13, an acquisition module 14, a first judgment module 15, a drive control module 16 and a drive circuit 17.
The vibration period operation module 11 is used for calculating the rotating speed and the vibration period of the engine according to the crankshaft angle of the engine when the automobile is in an idling working condition; the vibration state presumption module 12 is used for presuming the vibration state of the engine according to the rotating speed and the vibration period of the engine when the automobile is in an idle working condition; the target current operation module 13 is used for calculating a target current value according to the vibration state of the engine; the acquisition module 14 is used for acquiring an ignition coil signal of the engine; the first judging module 15 is used for judging whether the engine is in an ignition state according to an ignition coil signal of the engine; the driving control module 16 is used for outputting a driving signal with working time to the driving circuit 17 according to a target current value and an ignition coil signal of the engine when the engine is in an ignition state, and the driving circuit 17 outputs a working current with action time to the actuator 18 according to the driving signal, so that the actuator 18 works according to the working current with action time to perform active vibration damping control on the automobile.
According to an embodiment of the present invention, as shown in fig. 5, the active vibration damping control apparatus for a vehicle further includes: and the second judging module 19 is used for detecting the speed of the automobile through the speed sensor so as to judge whether the automobile is in an idling working condition.
According to an embodiment of the present invention, the first determining module 15 is further configured to count time by a timer when the engine is determined not to be in the ignition state according to the ignition coil signal of the engine, and when the counted time reaches a preset time, if the engine is not in the ignition state yet, the second determining module 19 is configured to re-determine whether the vehicle is in the idle condition.
According to an embodiment of the present invention, as shown in fig. 5, the active vibration damping control device for a vehicle further includes: a current detection module 20 and a target current correction module 21. The current detection module 20 is used for detecting the output current of the driving circuit 17 to obtain the working temperature of the actuator 18; the target current correction module 21 is configured to adjust the target current value according to the operating temperature of the actuator 18.
According to an embodiment of the present invention, as shown in fig. 5, the active vibration damping control device for a vehicle further includes: and the third judging module 22 is configured to detect acceleration of the automobile through the acceleration sensor to obtain vibration information of the automobile, judge whether a current vibration value of the automobile is greater than a preset vibration threshold value according to the vibration information of the automobile, and correct the target current value through the target current correcting module 21 when the current vibration value of the automobile is greater than the preset vibration threshold value, so that the actuator 18 adjusts dynamic stiffness of an active suspension system of the automobile according to the corrected target current value to perform active vibration damping control on the automobile.
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 refer to details that are disclosed in the active vibration damping control method of the vehicle according to the embodiment of the present invention, and are not described herein again.
According to the active vibration damping control device of the automobile, when the automobile is in an idling working condition, the rotating speed and the vibration period of the engine are calculated through the detected crank angle of the engine, the vibration state of the engine is calculated according to the rotating speed and the vibration period, and then the target current value is calculated according to the vibration state. And then, judging whether the engine is in an ignition state or not according to the ignition coil signal, if so, outputting a driving signal with working time to a driving circuit according to a target current value and the ignition coil signal, outputting a working current with action time to an actuator by the driving circuit according to the driving signal, and working the actuator according to the working current so as to perform active vibration damping control on the automobile. Therefore, active vibration damping control of the automobile under the idle working condition is achieved, high timeliness is achieved, the effective moment of vibration damping and noise reduction is directly obtained through ignition coil signals, the action time of vibration damping control is more accurate, and the vibration 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 vehicle 1000 includes the active vibration damping control device 100 of the vehicle described above.
According to the automobile provided by the embodiment of the invention, the active vibration damping control of the automobile under the idle working condition can be realized through the active vibration damping control device of the automobile, the timeliness is higher, and the effective moment of vibration damping and noise reduction is directly obtained by using the ignition coil signal, so that the action time of vibration damping control is more accurate, and the vibration damping effect is more effective.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the 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 present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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.
Claims (11)
1. An active vibration damping control method of an automobile is characterized by comprising the following steps:
s1, when the automobile is in an idle working condition, the rotating speed and the vibration period of the engine are calculated by detecting the crank angle of the engine, the vibration state of the engine is estimated according to the rotating speed and the vibration period of the engine, and a target current value is calculated according to the vibration state of the engine;
s2, acquiring an ignition coil signal of the engine;
s3, judging whether the engine is in an ignition state according to the ignition coil signal of the engine;
s4, 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 value and an ignition coil signal of the engine;
and S5, 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, wherein before step S1, the speed of the automobile is detected by a speed sensor to determine whether the automobile is in an idle condition.
3. 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-S3 is returned.
4. The active vibration damping control method of an automobile according to any one of claims 1 to 3, characterized by further comprising:
detecting the output current of the driving circuit to obtain the working temperature of the actuator;
and adjusting the target current value according to the working temperature of the actuator.
5. The active vibration damping control method of an automobile according to any one of claims 1 to 3, 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 a preset vibration threshold value, correcting the target current value so that the actuator can adjust the dynamic stiffness of the active suspension system of the automobile according to the corrected target current value to perform active vibration damping control on the automobile.
6. An active damping control device for an automobile, comprising:
the vibration period calculation module is used for calculating the rotating speed and the vibration period of the engine according to the angle of a crankshaft of the engine when the automobile is in an idling working condition;
the vibration state estimation module is used for estimating the vibration state of the engine according to the rotating speed and the vibration period of the engine when the automobile is in an idling working condition;
the target current operation module is used for calculating a target current value according to the vibration state of the engine;
an acquisition module 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 value 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 perform active vibration damping control on the automobile.
7. The active vibration damping control device of an automobile according to claim 6, further comprising:
the second judgment module is used for detecting the speed of the automobile through a speed sensor so as to judge whether the automobile is in an idling working condition.
8. The active vibration damping control device according to claim 7, wherein the first determining module is further configured to count time by a timer when the engine is determined not to be in the ignition state according to an ignition coil signal of the engine, and when the counted time reaches a preset time, if the engine is not in the ignition state, the second determining module is configured to re-determine whether the vehicle is in the idle state.
9. The active vibration damping control device for an automobile according to any one of claims 6 to 8, characterized by 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 adjusting the target current value according to the working temperature of the actuator.
10. The active vibration damping control device for an automobile according to claim 9, further comprising:
and the third judgment module is used for detecting the acceleration of the automobile through an acceleration sensor so as to acquire vibration information of the automobile, judging whether the current vibration value of the automobile is greater than a preset vibration threshold value or not according to the vibration information of the automobile, and correcting the target current value through the target current correction module when the current vibration value of the automobile is greater 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 value so as to perform active vibration reduction control on the automobile.
11. A motor vehicle, characterized by comprising an active vibration damping control apparatus of a motor vehicle according to any one of claims 6 to 10.
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| CN201710042594.6A CN108327504B (en) | 2017-01-20 | 2017-01-20 | Automobile and active vibration damping control method and device thereof |
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| CN111890908B (en) * | 2020-08-12 | 2022-10-04 | 湖南道依茨动力有限公司 | Vehicle vibration damping system, vehicle and vehicle vibration damping method |
| CN113074045B (en) * | 2021-04-22 | 2022-04-29 | 东风柳州汽车有限公司 | Engine misfire diagnosis method, engine misfire diagnosis device, engine misfire diagnosis equipment and storage medium |
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| WO2011004784A1 (en) * | 2009-07-08 | 2011-01-13 | 本田技研工業株式会社 | Active anti-vibration supporting device and anti-vibration control method for same |
| CN102392874A (en) * | 2011-06-24 | 2012-03-28 | 三一重机有限公司 | Vibration-reducing control method of engine variable damp |
| US20150142235A1 (en) * | 2012-05-21 | 2015-05-21 | Toyota Jidosha Kabushiki Kaisha | Vibration damping control apparatus |
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| CN101289977A (en) * | 2007-04-19 | 2008-10-22 | 丰田自动车株式会社 | Internal combustion engine device and control method for internal combustion engine device |
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