CN112413031A - Electric control damping adjustable shock absorber and adjusting method thereof - Google Patents
Electric control damping adjustable shock absorber and adjusting method thereof Download PDFInfo
- Publication number
- CN112413031A CN112413031A CN202011209236.8A CN202011209236A CN112413031A CN 112413031 A CN112413031 A CN 112413031A CN 202011209236 A CN202011209236 A CN 202011209236A CN 112413031 A CN112413031 A CN 112413031A
- Authority
- CN
- China
- Prior art keywords
- damping
- shock absorber
- rod
- valve rod
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3292—Sensor arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
- F16F9/464—Control of valve bias or pre-stress, e.g. electromagnetically
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an electric control damping adjustable shock absorber and an adjusting method thereof, wherein the adjusting method comprises the following steps: the device comprises a cylinder barrel, a piston rod, a piston, a floating piston, a movable valve rod and an electric control adjusting device; the floating piston divides an inner cavity of the cylinder barrel into an oil cavity and an air cavity, the oil cavity is filled with hydraulic oil, and a certain amount of compressed air is filled into the air cavity; the electrically controlled adjusting device comprises: the device comprises a regulating device shell, a return spring, an electric control displacement assembly and an electric interface; the invention arranges the electric control adjusting device of the shock absorber on the piston rod, and pushes the movable valve rod in the hollow cavity of the piston rod through the electric control adjusting device to adjust the opening of the damping adjusting valve and realize the aim of adjusting the damping of the shock absorber.
Description
Technical Field
The invention belongs to the technical field of automobile suspension systems, and particularly relates to an electric control damping adjustable shock absorber and an adjusting method thereof.
Background
At present, the damping of the shock absorbers adopted on most automobiles is not adjustable, the damping magnitude only depends on the form of each valve element and the elasticity of the valve plate group, a suspension system of a vehicle adopting the shock absorbers cannot timely adjust the damping characteristic of the suspension according to the running working condition of the vehicle, and the comfort and the operation stability of the vehicle are difficult to be well coordinated.
The appearance of the active suspension provides an effective means for solving the technical problems. The active suspension is used as an actuator of the direct force generator, and can perform optimal feedback control according to input and output, so that the suspension has the best damping characteristic, and the smoothness and the steering stability of the automobile are improved. However, it is still in the experimental stage and is only used in some racing cars and middle and high-grade cars because of its high cost, extra control power and so on. In order to realize the adjustable damping characteristic of the suspension, a lot of researches on the adjustable damping shock absorbers are also made in China.
The invention discloses a shock absorber piston with adjustable damping in the Chinese patent application No. CN201510830312.X, which comprises a piston body and a piston rod arranged on the piston body in a penetrating manner, wherein a liquid passing hole is formed in the piston body, a movable groove is formed in at least one end surface of the piston body, the liquid passing hole is positioned at the bottom of the movable groove and is communicated with the movable groove, a telescopic piece is arranged in the movable groove, the telescopic piece is embedded in the movable groove, and a control piece capable of controlling the telescopic piece to stretch and contract to adjust the opening size of the liquid passing hole is further arranged in the movable groove. When the telescopic piece is changed in a telescopic mode, the size of an opening of the liquid passing hole can be adjusted, the friction between liquid and the inner wall and the internal friction of liquid molecules are changed, the damping force is changed, the damping size is adjusted to achieve the effect of adjustable damping, the piston of the shock absorber is simple in structure, the overall structure of the shock absorber needs to be specially designed when the piston is used in the shock absorber, and the cost is still high.
The invention relates to a damping adjustable automobile shock absorber in China's patent application No. CN2020101699025.X, which comprises an oil storage cylinder barrel, a working cylinder barrel, a piston body, a piston rod and an excitation assembly which are coaxially arranged; the working cylinder barrel is positioned in the oil storage cylinder barrel; the piston body is fixed at the end part of the piston rod and is in sliding fit with the working cylinder barrel, and the oil storage cavity is communicated with the pressure cavity through an oil supplementing port; the piston body is provided with a damping hole for communicating the pressure cavity with the recovery cavity; a flow blocking block made of magnetostrictive materials is fixedly arranged on the inner wall of the damping hole; the excitation assembly is used for applying a magnetic field to the spoiler to enable the spoiler to stretch and contract so as to change the minimum flow cross section of the damping hole; the shock absorber of the invention changes the magnetic field passing through the flow blocking block by adjusting the current in the excitation assembly, so that the flow blocking block can extend or shorten along the radial direction of the damping hole, thereby adjusting the area of the flow cross section of the damping hole and realizing the change of the damping force of the shock absorber. Although the invention can realize the adjustable damping, the magnet exciting coil is fixed outside the working cylinder barrel, and when the shock absorber works, the piston can move up and down along the axial direction of the cylinder barrel, and the magnetic field passing through the flow blocking block can be changed continuously, thereby causing the damping fluctuation.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides an electrically controlled damping adjustable shock absorber and an adjusting method thereof, so as to solve the problems of complicated structure, high cost and poor damping adjusting performance of the electrically controlled damping adjustable shock absorber in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention discloses an electric control damping adjustable shock absorber, which comprises: the device comprises a cylinder barrel, a piston rod, a piston, a floating piston, a movable valve rod and an electric control adjusting device; the floating piston divides an inner cavity of the cylinder barrel into an oil cavity and an air cavity, the oil cavity is filled with hydraulic oil, and a certain amount of compressed air is filled into the air cavity; the piston is tightly pressed on the piston rod through a gasket and a nut, the piston divides an oil cavity into an upper oil cavity and a lower oil cavity, and a stretching valve and a circulating valve are arranged on the piston and are respectively used for energy dissipation and vibration reduction during the stretching stroke and the compression stroke of the vibration absorber; the piston rod is of a hollow structure, and an oil return hole is formed in the position, close to the piston, of the upper part of the piston rod; the movable valve rod is arranged in the hollow cavity of the piston rod, is in clearance fit with the inner wall of the piston rod and axially slides relative to the piston rod;
the electrically controlled adjusting device comprises: the device comprises a regulating device shell, a return spring, an electric control displacement assembly and an electric interface; the adjusting device shell is fixedly connected with the piston rod; the return spring is arranged between the adjusting device shell and the upper end plate of the valve rod of the movable valve rod and has certain pretightening force; the upper part of the electric control displacement assembly is fixedly connected with the adjusting device shell, and the lower part of the electric control displacement assembly is contacted with the upper surface of the upper end plate of the valve rod of the movable valve rod; the electric interface is used for being connected with power supply equipment, and the displacement output quantity of the electric control displacement assembly can be adjusted by adjusting the current passing through the electric interface, so that the movable valve rod is driven to move up and down relative to the piston rod, and the damping adjustment of the shock absorber is realized.
Furthermore, the diameter of a certain length below the movable valve rod is smaller than that above the movable valve rod, so that a certain oil return channel is reserved between the movable valve rod and the inner wall of the piston rod, and the movable valve rod and the inner wall of the piston rod are sealed through a sealing ring, so that leakage of hydraulic oil is prevented.
Furthermore, the bottom of the movable valve rod is of a circular truncated cone-shaped structure, a damping adjusting valve is formed between the bottom of the movable valve rod and the piston rod, when the movable valve rod moves downwards relative to the piston rod, the opening degree of the damping adjusting valve is increased, hydraulic oil flowing through the damping adjusting valve is increased when the shock absorber works, and the damping of the shock absorber is reduced; when the movable valve rod moves upwards relative to the piston rod, the opening degree of the damping adjusting valve is reduced, hydraulic oil flowing through the damping adjusting valve is reduced when the shock absorber works, and the damping of the shock absorber is increased.
Further, the electrically controlled displacement assembly comprises: the device comprises a magnetostrictive rod, a first excitation coil, a first magnetism isolating cover and a first displacement amplifying mechanism; the magnetostrictive rod and the first magnetism isolating cover are fixed on the adjusting device shell, the first exciting coil is wound on the outer wall of the magnetostrictive rod, and two wiring terminals of the first exciting coil penetrate through a wire hole in the adjusting device shell to be connected with an external electrical interface; the first displacement amplifying mechanism is formed by symmetrically arranging two identical first displacement amplifying levers, the first displacement amplifying levers are connected with the adjusting device shell through hinges, a first short arm contact of each first displacement amplifying lever is in contact with the lower bottom surface of the magnetostrictive rod above the first displacement amplifying lever, and a first long arm contact of each first displacement amplifying lever is in contact with the upper surface of the valve rod upper end plate of the movable valve rod below the first displacement amplifying lever.
Further, the electrically controlled displacement assembly comprises: the electric driven telescopic rod, the connecting wire and the second displacement amplifying mechanism; the electric expansion rod is fixed on the adjusting device shell and is formed by stacking piezoelectric ceramic layers, and the connecting lead is used for respectively and sequentially electrically connecting the positive electrode layer and the negative electrode layer formed between the piezoelectric ceramic layers and penetrating through a lead hole on the adjusting device shell to be connected with an external electrical interface; the second displacement amplifying mechanism is formed by symmetrically arranging two same second displacement amplifying levers, the second displacement amplifying levers are connected with the adjusting device shell through hinges, a second short arm contact of the second displacement amplifying levers is in contact with the lower bottom surface of the electrostrictive rod above the second displacement amplifying levers, and a second long arm contact of the second displacement amplifying levers is in contact with the upper surface of the valve rod upper end plate of the movable valve rod below the second displacement amplifying levers.
Further, the electrically controlled displacement assembly comprises: the iron core, the second excitation coil, the second magnetism isolating cover and the permanent magnet; the iron core and the second magnetic shield are fixed on the shell of the adjusting device, the second exciting coil is wound on the outer wall of the iron core, and two wiring terminals of the second exciting coil penetrate through a wire hole in the shell of the adjusting device to be connected with an external electrical interface; the permanent magnet is fixed on the upper surface of the upper end plate of the valve rod of the movable valve rod, and the magnetic pole direction is along the axial direction of the piston rod; after the second excitation coil is electrified, the magnetized magnetic pole direction of the iron core is opposite to the magnetic pole direction of the permanent magnet.
The invention discloses an adjusting method of an electric control damping adjustable shock absorber, which is based on the shock absorber and comprises the following steps:
1) acquiring stress information on a piston rod of the shock absorber, length information of the shock absorber and current information introduced by an electrical interface in real time;
2) according to the acquired information, the damping of the current shock absorber is calculated, and the calculation formula is as follows:
wherein c (t) is the damping of the shock absorber at time t; f (t) is the stress on the piston rod of the shock absorber collected by the sensor at the time t; l (t) is the length of the shock absorber at time t; t is time;
3) the damping c (t) of the shock absorber at the time t and the target damping c of the shock absorber at the time t are comparedaim(t) comparing to obtain a damping deviation value delta c (t), wherein the calculation formula is as follows:
Δc(t)＝caim(t)-c(t)；
4) and (3) calculating to obtain a current input quantity i (t) required at the time t by using the delta c as an input through a PID (proportion integration differentiation) closed-loop control method to form a damping loop:
in the formula, KpIs the damping ring proportion coefficient; kiIs the damping loop integral coefficient; kdIs damping ring differential coefficient;
5) the electronic control unit adjusts the current value introduced into the electric interface of the shock absorber to enable the current value to reach i (t);
6) and (5) repeating the steps (1) to (5) to realize timely adjustment of the damping of the shock absorber.
The invention has the beneficial effects that:
the invention arranges the electric control adjusting device of the shock absorber on the piston rod, and pushes the movable valve rod in the hollow cavity of the piston rod through the electric control adjusting device to adjust the opening of the damping adjusting valve and realize the aim of adjusting the damping of the shock absorber. Compared with the traditional damping adjustable shock absorber, the electronic control adjusting technology is adopted, so that the timely and accurate adjustment of the damping of the shock absorber can be realized; compared with the existing electric control damping adjustable shock absorber, the structure is greatly simplified, the manufacturing cost can be reduced, and the response speed is improved.
Drawings
FIG. 1 is a structural view of a shock absorber in accordance with the present invention;
FIG. 2 is a structural view of an electrically controlled adjusting device of the first embodiment;
FIG. 3 is a structural view of an electronically controlled adjusting device of a second embodiment;
FIG. 4 is a structural view of an electrically controlled adjusting device of a third embodiment;
FIG. 5 is a flow chart of damper damping adjustment;
in the figure, 1-floating piston, 2-cylinder, 31-nut, 32-gasket, 4-piston, 41-extension valve, 42-flow valve, 5-piston rod, 51-oil return hole, 6-moving valve rod, 62-valve rod upper end plate, 7-electric control adjusting device, 71-return spring, 72-hinge, 731-magnetostrictive rod, 7320-first excitation coil, 7321-second excitation coil, 7330-first magnetic shield, 7331-second magnetic shield, 734-first displacement amplifying lever, 7341-first short arm contact, 7342-first long arm contact, 735-electrostrictive rod, 7351-positive electrode layer, 7352-negative electrode layer, 736-connecting wire, 737-second displacement amplifying lever, 7371-second short arm contact, 7372-second long arm contact, 738-iron core, 739-permanent magnet, 74-adjusting device housing, 741-wire guide, 75-electrical interface, 81-upper oil chamber, 82-lower oil chamber, 9-damping adjusting valve, 10-sealing ring.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1, the invention relates to an electric control damping adjustable shock absorber, which comprises: the device comprises a cylinder barrel 2, a piston rod 5, a piston 4, a floating piston 1, a movable valve rod 6 and an electric control adjusting device 7; the floating piston 1 divides the inner cavity of the cylinder barrel 2 into an oil cavity and an air cavity, the oil cavity is filled with hydraulic oil, and a certain amount of compressed air is filled in the air cavity; the piston 4 is pressed on the piston rod 5 through a gasket 32 and a nut 31, the piston 4 divides an oil cavity into an upper oil cavity 81 and a lower oil cavity 82, and the piston 4 is provided with a stretching valve 41 and a flow valve 42 which are respectively used for energy dissipation and vibration reduction during the stretching stroke and the compression stroke of the vibration absorber; the piston rod 5 is of a hollow structure, and an oil return hole 51 is formed in the upper part of the piston rod 5, which is close to the piston 4; the movable valve rod 6 is arranged in the hollow cavity of the piston rod 5, is in clearance fit with the inner wall of the piston rod 5 and axially slides relative to the piston rod 5;
the electrically controlled adjusting device 7 comprises: the adjusting device comprises an adjusting device shell 74, a return spring 71, an electric control displacement component and an electric interface 75; the adjusting device housing 74 is fixedly connected to the piston rod 5; the return spring 71 is arranged between the adjusting device shell 74 and the valve rod upper end plate 62 of the movable valve rod 6 and has certain pretightening force; the upper part of the electric control displacement assembly is fixedly connected with the adjusting device shell, and the lower part of the electric control displacement assembly is contacted with the upper surface of the upper end plate of the valve rod of the movable valve rod 6; the electrical interface 75 is used for being connected with a power supply device, and the displacement output quantity of the electric control displacement assembly can be adjusted by adjusting the current passing through the electrical interface 75, so that the movable valve rod 6 is driven to move up and down relative to the piston rod 5, and the damping adjustment of the shock absorber is realized.
Wherein, the diameter of certain length in removal valve rod 6 below is less than the top, makes and leaves certain oil return passage between removal valve rod 6 and the 5 inner walls of piston rod, seals through sealing ring 10 between removal valve rod 6 and the 5 inner walls of piston rod, prevents the hydraulic oil seepage.
The bottom of the movable valve rod 6 is of a circular truncated cone-shaped structure, a damping adjusting valve 9 is formed between the movable valve rod 6 and the piston rod 5, when the movable valve rod 6 moves downwards relative to the piston rod 5, the opening degree of the damping adjusting valve 9 is increased, hydraulic oil flowing through the damping adjusting valve 9 is increased when the shock absorber works, and the damping of the shock absorber is reduced; when the movable valve rod 6 moves upward relative to the piston rod 5, the opening degree of the damping adjusting valve 9 is reduced, the hydraulic oil flowing through the damping adjusting valve 9 when the shock absorber works is reduced, and the damping of the shock absorber is increased.
Referring to fig. 2, the electrically controlled displacement assembly comprises: a magnetostrictive rod 731, a first excitation coil 7320, a first magnetism shield 7330, and a first displacement amplification mechanism; the magnetostrictive rod 731 and the first magnetism isolating cover 7330 are fixed on the adjusting device housing 74, the first excitation coil 7320 is wound on the outer wall of the magnetostrictive rod 731, and two terminals of the first excitation coil 7320 pass through the wire holes 741 on the adjusting device housing 74 to be connected with the external electrical interface 75; the first displacement amplification mechanism is formed by symmetrically arranging two identical first displacement amplification levers 734, the first displacement amplification levers 734 are connected with the adjusting device housing 74 through the hinge 72, the first short arm contact 7341 of the first displacement amplification lever 734 is in contact with the lower bottom surface of the magnetostrictive rod 731 above the first short arm contact 7341, and the first long arm contact 7342 of the first displacement amplification lever 734 is in contact with the upper surface of the valve rod upper end plate 62 of the movable valve rod 6 below the first long arm contact 7342.
Referring to fig. 3, the electrically controlled displacement assembly comprises: an electric telescopic rod 735, a connecting wire 736 and a second displacement amplifying mechanism; the electrostrictive rod is fixed on the adjusting device shell 74 and is formed by stacking piezoelectric ceramic layers, and the connecting lead is used for respectively and sequentially electrically connecting the positive electrode layer 7351 and the negative electrode layer 7352 formed between the piezoelectric ceramic layers and penetrating through a lead hole 741 on the adjusting device shell 74 to be connected with an external electrical interface 75; the second displacement amplifying mechanism is formed by symmetrically arranging two identical second displacement amplifying levers 737, the second displacement amplifying levers 737 are connected with the adjusting device shell 74 through hinges, a second short arm contact 7371 of the second displacement amplifying levers is in contact with the lower bottom surface of the electrostrictive rod above the second displacement amplifying levers, and a second long arm contact 7372 of the second displacement amplifying levers is in contact with the upper surface of the valve rod upper end plate 62 of the movable valve rod 6 below the second displacement amplifying levers.
Referring to fig. 4, the electrically controlled displacement assembly comprises: a core 738, a second excitation coil 7321, a second magnetism shielding cover 7331, and a permanent magnet 739; the iron core 738 and the second magnetic shield 7331 are fixed on the adjusting device casing 74, the second excitation coil 7321 is wound on the outer wall of the iron core 738, and two terminals of the second excitation coil 7321 pass through the wire hole 741 on the adjusting device casing 74 to be connected with the external electrical interface 75; the permanent magnet 739 is fixed on the upper surface of the valve rod upper end plate 62 of the movable valve rod 6, and the magnetic pole direction is along the axial direction of the piston rod 5; when the second field coil is energized, the magnetic pole direction of the magnetized core 738 is opposite to the magnetic pole direction of the permanent magnet 739.
Referring to fig. 5, the method for adjusting the electronically controlled damping adjustable shock absorber of the present invention comprises the following steps:
1) a sensor in a vehicle suspension system acquires stress information on a piston rod of a shock absorber, length information of the shock absorber and current information introduced by an electrical interface in real time and transmits the acquired information to a corresponding Electronic Control Unit (ECU);
2) the electronic control unit calculates the damping of the current shock absorber according to the acquired information, and the calculation formula is as follows:
wherein c (t) is the damping of the shock absorber at time t; f (t) is the stress on the piston rod of the shock absorber collected by the sensor at the time t; l (t) is the length of the shock absorber at time t; t is time;
3) the damping c (t) of the shock absorber at the time t and the target damping c of the shock absorber at the time t are comparedaim(t) comparing to obtain a damping deviation value delta c (t), wherein the calculation formula is as follows:
Δc(t)＝caim(t)-c(t)；
4) and (3) calculating to obtain a current input quantity i (t) required at the time t by using the delta c as an input through a PID (proportion integration differentiation) closed-loop control method to form a damping loop:
in the formula, KpIs the damping ring proportion coefficient; kiIs the damping loop integral coefficient; kdIs damping ring differential coefficient;
5) the electronic control unit adjusts the current value introduced into the electric interface of the shock absorber to enable the current value to reach i (t);
6) and (5) repeating the steps (1) to (5) to realize timely adjustment of the damping of the shock absorber.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. An electronically controlled damping adjustable shock absorber, comprising: the device comprises a cylinder barrel, a piston rod, a piston, a floating piston, a movable valve rod and an electric control adjusting device; the floating piston divides an inner cavity of the cylinder barrel into an oil cavity and an air cavity, the oil cavity is filled with hydraulic oil, and a certain amount of compressed air is filled into the air cavity; the piston is tightly pressed on the piston rod through a gasket and a nut, the piston divides an oil cavity into an upper oil cavity and a lower oil cavity, and a stretching valve and a circulating valve are arranged on the piston and are respectively used for energy dissipation and vibration reduction during the stretching stroke and the compression stroke of the vibration absorber; the piston rod is of a hollow structure, and an oil return hole is formed in the position, close to the piston, of the upper part of the piston rod; the movable valve rod is arranged in the hollow cavity of the piston rod, is in clearance fit with the inner wall of the piston rod and axially slides relative to the piston rod;
the electrically controlled adjusting device comprises: the device comprises a regulating device shell, a return spring, an electric control displacement assembly and an electric interface; the adjusting device shell is fixedly connected with the piston rod; the return spring is arranged between the adjusting device shell and the upper end plate of the valve rod of the movable valve rod and has certain pretightening force; the upper part of the electric control displacement assembly is fixedly connected with the adjusting device shell, and the lower part of the electric control displacement assembly is contacted with the upper surface of the upper end plate of the valve rod of the movable valve rod; the electric interface is used for being connected with power supply equipment, and the displacement output quantity of the electric control displacement assembly can be adjusted by adjusting the current passing through the electric interface, so that the movable valve rod is driven to move up and down relative to the piston rod, and the damping adjustment of the shock absorber is realized.
2. The electrically controlled damping adjustable shock absorber according to claim 1, wherein a certain length of the diameter below the moving valve rod is smaller than that above the moving valve rod, so that a certain oil return channel is reserved between the moving valve rod and the inner wall of the piston rod, and the moving valve rod and the inner wall of the piston rod are sealed by a sealing ring to prevent hydraulic oil from leaking.
3. The electrically controlled damping adjustable shock absorber according to claim 1, wherein the bottom of the movable valve rod is of a truncated cone structure, and a damping adjusting valve is formed between the movable valve rod and the piston rod, when the movable valve rod moves downwards relative to the piston rod, the opening of the damping adjusting valve is increased, the hydraulic oil flowing through the damping adjusting valve during the operation of the shock absorber is increased, and the damping of the shock absorber is reduced; when the movable valve rod moves upwards relative to the piston rod, the opening degree of the damping adjusting valve is reduced, hydraulic oil flowing through the damping adjusting valve is reduced when the shock absorber works, and the damping of the shock absorber is increased.
4. An electrically controlled damping adjustable shock absorber according to claim 1 wherein said electrically controlled displacement assembly comprises: the device comprises a magnetostrictive rod, a first excitation coil, a first magnetism isolating cover and a first displacement amplifying mechanism; the magnetostrictive rod and the first magnetism isolating cover are fixed on the adjusting device shell, the first exciting coil is wound on the outer wall of the magnetostrictive rod, and two wiring terminals of the first exciting coil penetrate through a wire hole in the adjusting device shell to be connected with an external electrical interface; the first displacement amplifying mechanism is formed by symmetrically arranging two identical first displacement amplifying levers, the first displacement amplifying levers are connected with the adjusting device shell through hinges, a first short arm contact of each first displacement amplifying lever is in contact with the lower bottom surface of the magnetostrictive rod above the first displacement amplifying lever, and a first long arm contact of each first displacement amplifying lever is in contact with the upper surface of the valve rod upper end plate of the movable valve rod below the first displacement amplifying lever.
5. An electrically controlled damping adjustable shock absorber according to claim 1 wherein said electrically controlled displacement assembly comprises: the electric driven telescopic rod, the connecting wire and the second displacement amplifying mechanism; the electric expansion rod is fixed on the adjusting device shell and is formed by stacking piezoelectric ceramic layers, and the connecting lead is used for respectively and sequentially electrically connecting the positive electrode layer and the negative electrode layer formed between the piezoelectric ceramic layers and penetrating through a lead hole on the adjusting device shell to be connected with an external electrical interface; the second displacement amplifying mechanism is formed by symmetrically arranging two same second displacement amplifying levers, the second displacement amplifying levers are connected with the adjusting device shell through hinges, a second short arm contact of the second displacement amplifying levers is in contact with the lower bottom surface of the electrostrictive rod above the second displacement amplifying levers, and a second long arm contact of the second displacement amplifying levers is in contact with the upper surface of the valve rod upper end plate of the movable valve rod below the second displacement amplifying levers.
6. An electrically controlled damping adjustable shock absorber according to claim 1 wherein said electrically controlled displacement assembly comprises: the iron core, the second excitation coil, the second magnetism isolating cover and the permanent magnet; the iron core and the second magnetic shield are fixed on the shell of the adjusting device, the second exciting coil is wound on the outer wall of the iron core, and two wiring terminals of the second exciting coil penetrate through a wire hole in the shell of the adjusting device to be connected with an external electrical interface; the permanent magnet is fixed on the upper surface of the upper end plate of the valve rod of the movable valve rod, and the magnetic pole direction is along the axial direction of the piston rod; after the second excitation coil is electrified, the magnetized magnetic pole direction of the iron core is opposite to the magnetic pole direction of the permanent magnet.
7. An adjusting method of an electrically controlled damping adjustable shock absorber based on the shock absorber of any one of claims 1 to 6, characterized by the steps of:
1) acquiring stress information on a piston rod of the shock absorber, length information of the shock absorber and current information introduced by an electrical interface in real time;
2) according to the acquired information, the damping of the current shock absorber is calculated, and the calculation formula is as follows:
wherein c (t) is the damping of the shock absorber at time t; f (t) is the stress on the piston rod of the shock absorber collected by the sensor at the time t; l (t) is the length of the shock absorber at time t; t is time;
3) the damping c (t) of the shock absorber at the time t and the target damping c of the shock absorber at the time t are comparedaim(t) comparing to obtain a damping deviation value delta c (t), wherein the calculation formula is as follows:
Δc(t)＝caim(t)-c(t)；
4) and (3) calculating to obtain a current input quantity i (t) required at the time t by using the delta c as an input through a PID (proportion integration differentiation) closed-loop control method to form a damping loop:
in the formula, KpIs the damping ring proportion coefficient; kiIs the damping loop integral coefficient; kdIs damping ring differential coefficient;
5) the electronic control unit adjusts the current value introduced into the electric interface of the shock absorber to enable the current value to reach i (t);
6) and (5) repeating the steps (1) to (5) to realize timely adjustment of the damping of the shock absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209236.8A CN112413031A (en) | 2020-11-03 | 2020-11-03 | Electric control damping adjustable shock absorber and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209236.8A CN112413031A (en) | 2020-11-03 | 2020-11-03 | Electric control damping adjustable shock absorber and adjusting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112413031A true CN112413031A (en) | 2021-02-26 |
Family
ID=74828104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011209236.8A Pending CN112413031A (en) | 2020-11-03 | 2020-11-03 | Electric control damping adjustable shock absorber and adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112413031A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI789878B (en) * | 2021-08-23 | 2023-01-11 | 琦玉國際有限公司 | Shock absorbers and their cylinders with electronic switching modes |
| CN118128216A (en) * | 2024-05-06 | 2024-06-04 | 四川中震智控科技有限公司 | Damper for building shock absorption |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278406A (en) * | 2011-06-20 | 2011-12-14 | 芜湖弘祥汽车减振器工业有限公司 | Absorber for adjusting damping force |
| CN103603912A (en) * | 2013-11-26 | 2014-02-26 | 江苏理工学院 | Piezoelectric driving type damping continuous adjustable shock absorber |
| CN203656028U (en) * | 2014-01-07 | 2014-06-18 | 吉林大学 | Throttling-port damping adjustable damper |
| CN105673760A (en) * | 2016-03-07 | 2016-06-15 | 江苏大学 | Piezoelectric self-sensing based adjustable damper |
| CN105864491A (en) * | 2016-05-10 | 2016-08-17 | 中国人民解放军军械工程学院 | Giant-magnetostriction driving and displacement amplifying device for direct drive valve |
| US20160297278A1 (en) * | 2013-11-26 | 2016-10-13 | Beijingwest Industries Co., Ltd. | Actuation mechanism for controllable damper |
| US20170159742A1 (en) * | 2015-12-07 | 2017-06-08 | GM Global Technology Operations LLC | Variable damping system using a piezoelectric device |
| CN107989948A (en) * | 2017-10-16 | 2018-05-04 | 中南大学 | A kind of continuous adjustable damper |
| CN108458026A (en) * | 2018-05-22 | 2018-08-28 | 杨华富 | A kind of gas spring and door |
| CN109139771A (en) * | 2018-07-13 | 2019-01-04 | 西南交通大学 | A kind of stepless adjustable shock absorber of damping |
| CN211449477U (en) * | 2019-11-29 | 2020-09-08 | 浙江雷宸智能科技有限公司 | Adjustable damper for treadmill |
| CN211778711U (en) * | 2020-02-25 | 2020-10-27 | 天津众恒汽车减震器有限公司 | Controllable shock absorber |
-
2020
- 2020-11-03 CN CN202011209236.8A patent/CN112413031A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278406A (en) * | 2011-06-20 | 2011-12-14 | 芜湖弘祥汽车减振器工业有限公司 | Absorber for adjusting damping force |
| CN103603912A (en) * | 2013-11-26 | 2014-02-26 | 江苏理工学院 | Piezoelectric driving type damping continuous adjustable shock absorber |
| US20160297278A1 (en) * | 2013-11-26 | 2016-10-13 | Beijingwest Industries Co., Ltd. | Actuation mechanism for controllable damper |
| CN203656028U (en) * | 2014-01-07 | 2014-06-18 | 吉林大学 | Throttling-port damping adjustable damper |
| US20170159742A1 (en) * | 2015-12-07 | 2017-06-08 | GM Global Technology Operations LLC | Variable damping system using a piezoelectric device |
| CN105673760A (en) * | 2016-03-07 | 2016-06-15 | 江苏大学 | Piezoelectric self-sensing based adjustable damper |
| CN105864491A (en) * | 2016-05-10 | 2016-08-17 | 中国人民解放军军械工程学院 | Giant-magnetostriction driving and displacement amplifying device for direct drive valve |
| CN107989948A (en) * | 2017-10-16 | 2018-05-04 | 中南大学 | A kind of continuous adjustable damper |
| CN108458026A (en) * | 2018-05-22 | 2018-08-28 | 杨华富 | A kind of gas spring and door |
| CN109139771A (en) * | 2018-07-13 | 2019-01-04 | 西南交通大学 | A kind of stepless adjustable shock absorber of damping |
| CN211449477U (en) * | 2019-11-29 | 2020-09-08 | 浙江雷宸智能科技有限公司 | Adjustable damper for treadmill |
| CN211778711U (en) * | 2020-02-25 | 2020-10-27 | 天津众恒汽车减震器有限公司 | Controllable shock absorber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI789878B (en) * | 2021-08-23 | 2023-01-11 | 琦玉國際有限公司 | Shock absorbers and their cylinders with electronic switching modes |
| CN118128216A (en) * | 2024-05-06 | 2024-06-04 | 四川中震智控科技有限公司 | Damper for building shock absorption |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0179077B1 (en) | Valve operating apparatus of internal combustion engine | |
| CN100402882C (en) | Damping force variable valve and shock absorber using same | |
| CN112413031A (en) | Electric control damping adjustable shock absorber and adjusting method thereof | |
| EP2060800B1 (en) | Combined actuator with rheological control brake | |
| CN205244233U (en) | From energizing quantity formula vehicle magnetorheological damper device | |
| US20180266514A1 (en) | Damping force adjustable shock absorber | |
| CN100484787C (en) | Controllable automobile magnetic rhological absorber with height adjusting function | |
| CN112283281B (en) | Damping adjusting valve and method for vibration absorber | |
| CN101074688A (en) | Hydraulic fluid channel with granule adsorbent magnet | |
| JPH05149364A (en) | Damping force regulating system hydraulic shock absorber | |
| CN2752541Y (en) | Magnetic flow variable liquid damper | |
| JP6084787B2 (en) | solenoid | |
| CN103423364A (en) | Hydraulic damper with adjustable damping | |
| CN206904139U (en) | A kind of MR damper with multiple road conditions vibration control | |
| CN103026094B (en) | Damping valve for shock absorber | |
| CN105673760A (en) | Piezoelectric self-sensing based adjustable damper | |
| US20230032430A1 (en) | Solenoid, damping force adjustment mechanism, and damping force adjustable shock absorber | |
| US5551540A (en) | Vibration damper and a vibration damper with a valve actuation device | |
| JP4825723B2 (en) | Vehicle damping force variable damper | |
| CN203548689U (en) | Magnetostrictive shock absorber | |
| CN110332275B (en) | Full-channel shear extrusion mixed mode magnetorheological damper and control method thereof | |
| CN103603914B (en) | Magnetostriction damper | |
| CN2725625Y (en) | Contravariance magnetic rheological damper | |
| US6896236B2 (en) | Controlled leakage hydraulic damper | |
| CN220015919U (en) | Electromagnetic valve device capable of avoiding air pocket influence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210226 |