CN116872706A - Driving mode control system and method for semi-active suspension system - Google Patents
Driving mode control system and method for semi-active suspension system Download PDFInfo
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- CN116872706A CN116872706A CN202310707841.5A CN202310707841A CN116872706A CN 116872706 A CN116872706 A CN 116872706A CN 202310707841 A CN202310707841 A CN 202310707841A CN 116872706 A CN116872706 A CN 116872706A
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- 239000000725 suspension Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000001133 acceleration Effects 0.000 claims abstract description 7
- 238000013016 damping Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000429 assembly Methods 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a driving mode control system and method of a semi-active suspension system, and relates to the field of suspension of power assemblies, wherein the driving mode control system of the semi-active suspension system comprises the following components: the driving mode control unit DMS, the engine management system EMS, the semi-active suspension system whole vehicle control DMS controller, the semi-active suspension and the semi-active suspension electromagnetic valve define the whole vehicle full-working condition matching semi-active suspension through the existing signal of the whole vehicle, and judge working conditions through the power-on IGON signal, the starting signal running signal, the flameout signal stopping signal, the vehicle speed vehiclespeed and the starting rotation speed signal enginespeed; the working conditions comprise cold machine idling, heat engine idling, starting, flameout, small accelerator starting, low vehicle speed passing threshold and acceleration and deceleration working conditions; according to different working conditions, the semi-active suspension is definitely in a state with high rigidity or low rigidity, so that the semi-active suspension fully realizes NVH performance full-working-condition control.
Description
Technical Field
The invention relates to the field of power assembly suspension, in particular to a driving mode control system and method of a semi-active suspension system.
Background
The power assembly suspension system has the functions of support, vibration isolation and limiting. The support mainly supports the total mass of the power assembly, the vibration isolation mainly is an idling and accelerating working condition, the dynamic stiffness and damping of the suspension work, and the limit work is that the suspended iron bump iron part works. In the engineering application process, the rubber suspension can have lower low-frequency dynamic stiffness, which is favorable for vibration isolation, but has low damping effect on vibration fast attenuation. The hydraulic suspension is a suspension which can have certain damping and has slightly higher dynamic stiffness than the rubber suspension. Because of limitations in various aspects of power assembly suspension, the vehicle is difficult to adapt to complex and changeable actual road surfaces, the control logic of the power assembly suspension is complex, the working conditions aimed at are simple, and a plurality of operation working conditions of the hybrid vehicle caused by the existence of two assemblies cannot be covered, so that NVH performance control aiming at various working conditions of the hybrid vehicle is more and more important.
Document (CN 113306382 a) discloses a method and system for controlling a semi-active engine suspension, thereby improving NVH performance and drivability of a vehicle and reducing noise and vibration generated under specific driving conditions. The method includes storing real-time vehicle speed data at predetermined time intervals and determining whether the engine is in an idle state. In response to determining that the engine is in an idle state, it is determined whether a current running state of the vehicle corresponds to a predetermined condition that prioritizes noise and vibration performance based on the vehicle speed change information. When it is determined that the current running state of the vehicle corresponds to a predetermined condition in the idle state of the engine, the semi-active engine mount is adjusted to be in an on state. The document proposes that the engine speed is a first critical value, and then the engine speed is identified to perform semi-active suspension switching, but suspension switching cannot be realized immediately if large rigidity and large damping are required during acceleration when a bumpy road surface is encountered. In actual operation, a hysteresis interval exists when small rigidity is required to be realized, and semi-active suspension control cannot be fully embodied.
Disclosure of Invention
Aiming at the problems in the prior art, the invention designs a driving mode control system and a driving mode control method of a semi-active suspension system, the semi-active suspension driving mode control can realize immediate effect of suspension corresponding working conditions, no hysteresis zone exists, and the control system is efficient and convenient.
One of the technical schemes adopted for realizing the invention is as follows: a semi-active suspension system driving mode control system, comprising: the driving mode control unit DMS and the engine management system EMS are respectively in communication connection with the semi-active suspension system whole vehicle control DMS controller, the semi-active suspension system whole vehicle control DMS controller is electrically connected with the semi-active suspension electromagnetic valve, and the semi-active suspension electromagnetic valve is connected with the semi-active suspension system combined closed loop.
The second technical scheme adopted by the invention is as follows: a driving mode control method of a semi-active suspension system is characterized in that a driving mode control unit DMS judges according to an EMS signal of an engine management system and outputs voltage to control a suspension electromagnetic valve to be powered on and powered off, and the stiffness damping of the semi-active suspension is switched.
Further, the driving mode control unit DMS recognizes the IGON signal, the vehicle speed vehicle speed=0, the engineering speed=0, the driving mode control unit DMS controls the semi-active suspension to be opened, the semi-active suspension system adopts a large stiffness and large damping mode, and the power is cut off after recognizing the running signal for 3 s.
Further, after the driving mode control unit DMS recognizes that the running signal continues for 3s to finish starting, the vehicle speed and the engine speed are recognized at the same time, the vehicle speed vehiclespeed=0, the engine speed is greater than 0, and the engine speed is less than or equal to 7000rpm, and the driving mode control unit DMS controls the semi-active suspension switch.
Further, the driving mode control unit DMS recognizes a running signal, vehiclespeed is not equal to 0, vehiclespeed is less than 20Km/h, enginespeed is less than 1900rpm, and the driving mode control unit DMS controls the semi-active suspension switch.
Further, the driving mode control unit DMS recognizes a running signal, vectoredepeded is not equal to 0, vectoredepeded is more than 15Km/h, and enginespeed is more than or equal to 1900rpm, and the driving mode control unit DMS controls the semi-active suspension to be on.
Further, the driving mode control unit DMS recognizes a running signal, vehiclespeed is more than 20KM/h, and engineering speed is less than or equal to 7000rpm, and the driving mode control unit DMS controls the semi-active suspension.
Further, the driving mode control unit DMS recognizes running signals, idle speed of the water temperature and the heat engine of the engine, start, flameout, start with a small accelerator, low speed over a threshold, and acceleration and deceleration working conditions, in the process of switching the working conditions of the vehicle, the DMSCU is required to maintain the control state of the previous working condition on the suspension, and when the condition of entering the next working condition is required to be judged, the suspension is controlled according to the requirement of the next working condition.
The driving mode control system and method of the semi-active suspension system have the beneficial effects that:
on the basis of not adding a sensor, the driving mode control system and method of the semi-active suspension system define the full working condition of the whole vehicle by the existing signal of the whole vehicle, and judge the working condition by powering on an IGON signal, a starting signal running signal, a flameout signal stopping signal, a vehicle speed signal and a starting rotation speed signal engine speed; the working conditions comprise cold machine idling, heat engine idling, starting, flameout, small accelerator starting, low vehicle speed passing threshold and acceleration and deceleration working conditions; according to different working conditions, the semi-active suspension is definitely in a state with high rigidity or low rigidity, so that the semi-active suspension fully realizes NVH performance full-working-condition control.
Drawings
FIG. 1 is a schematic diagram of a semi-active suspension system ride mode control system;
FIG. 2 is a schematic diagram of semi-active suspension stiffness and damping characteristics and applicable operating conditions in an embodiment;
FIG. 3 is a diagram showing vibration contrast of a small throttle start condition in an embodiment;
FIG. 4 is a graph showing vibration damping contrast for a low speed over-threshold condition in an embodiment;
fig. 5 is a DMS suspension control state diagram for vehicle speed and engine speed in successive intervals in an embodiment.
Detailed Description
The present invention will be described in further detail below with reference to fig. 1 to 5 and the detailed description, and for the purpose of making the objects, technical solutions and advantages of the embodiments more clear, the technical solutions in the examples will be clearly and completely described with reference to the drawings in the examples, and the detailed description is only for explaining the present invention and not limiting the scope of the present invention.
As shown in fig. 1, a driving mode control system of a semi-active suspension system includes: the driving mode control unit DMS and the engine management system EMS are respectively in communication connection with the semi-active suspension system whole vehicle control DMS controller, the semi-active suspension system whole vehicle control DMS controller is electrically connected with the semi-active suspension electromagnetic valve, and the semi-active suspension electromagnetic valve is connected with the semi-active suspension system combined closed loop.
As shown in figure 2, the suspension electrifying process is in a large-rigidity large-damping state, hereinafter referred to as suspension on, the suspension de-electrifying process is referred to as suspension off, hereinafter referred to as suspension small-rigidity small-damping process, the DMS judges according to an EMS signal, and outputs voltage to control the suspension electromagnetic valve to switch on and off, and the suspension rigidity damping is switched.
Starting conditions: the DMS recognizes the IGON signal, the vehicle speed and the vehicle speed are respectively equal to 0 and 0, the suspension system is controlled to be semi-actively suspended in a large-rigidity large-damping mode, and the suspension system is powered off after recognizing the running signal for 3 seconds, so that the suspension is ensured to be in a large-rigidity large-damping working state in the starting process of the engine.
Idle speed of cold machine and idle speed of heat engine: after the DMS recognizes that the running signal lasts for 3 seconds to finish starting, the vehicle speed and the engine rotating speed are recognized at the same time, the vehicle speed vehiclespeed=0, the engine rotating speed enginespeed is more than 0, the enginespeed is less than or equal to 7000rpm, the DMS controls the semi-active suspension to be closed, and the suspension is in a small-rigidity small-damping working condition.
Small throttle starting condition: the DMS recognizes the running signal, vectorespeed is not equal to 0, vectorespeed is less than 20Km/h, enginespeed is less than 190 rpm, and the DMS controls the semi-active suspension to be closed, and the suspension is in a small-rigidity and small-damping working condition.
Low speed threshold condition: the DMS recognizes the running signal, vehiclespeed is not higher than 0, vehiclespeed is not lower than 15Km/h, enginespeed is not lower than 1900rpm, and the DMS controls the semi-active suspension to be opened and the suspension is in large damping.
Acceleration and deceleration conditions: the DMS recognizes the running signal, vehiclespeed is more than 20KM/h, engine speed is less than or equal to 7000rpm, the DMS controls the semi-active suspension to be opened, and the suspension is in a working condition of large rigidity and large damping.
Flameout conditions: the DMS recognizes running signals, water temperature and heat engine idling, starting, flameout, small accelerator starting, low speed threshold crossing and acceleration and deceleration working conditions, the DMSCU is required to maintain the control state of the previous working condition on the suspension in the process of switching the working conditions of the vehicle, and the suspension is controlled according to the requirement of the next working condition when the condition for entering the next working condition is judged to be met.
According to vibration isolation theory, the idle working condition needs to use small rigidity and small damping, the starting uses a large damping state, the flameout is according to the test, the power-on state is in the large damping state, and the vibration is less than 50% of the power-off state.
The small accelerator starting working condition is that the vehicle speed is basically less than or equal to 12Km/h, the engine rotating speed is less than or equal to 3000rpm, as shown in figure 3, the small rigidity small damping and the large rigidity large damping are disclosed in the small accelerator starting, the vibration is compared, and the small rigidity small damping working condition is adopted in the working condition.
In the low-speed threshold passing working condition, the vibration attenuation time of the large damping and the small damping mainly passes through the threshold, for example, 20Km/h, the starting vibration attenuation time is shown in the attached figure 4, and the power-on state is shortened by 0.04s than the power-off state attenuation time, so that the large damping state is ensured in the low-speed threshold passing stage.
The 15Km/h and the 20Km/h identified by the method are determined according to the actual vehicle adjustment process, the actual vehicle operation process in different vehicle types may not be required to be 15 or 20Km/h, the vehicle self-adaptive cruise function can be used, and experiments are carried out from 10KM/h to 20KM/h at intervals of 1KM/h, so that the suspension soft and hard working conditions corresponding to specific vehicle speeds are determined.
The driving mode control includes the condition identification and the suspension mode switching of various conditions, so as to ensure the continuity of the switching process, thus, as shown in fig. 5, the vehicle speed and the engine speed are in the DMS suspension control state in the continuous interval.
Those skilled in the art will appreciate that the invention is not limited to the specific embodiments described herein, but is capable of numerous obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Although the invention has been described in more detail by way of the above embodiments, the invention is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the invention, and it will be apparent to those skilled in the art that several modifications and adaptations can be made without departing from the principles of the invention, and the modifications and adaptations should and are intended to be comprehended within the scope of the invention.
Claims (8)
1. A semi-active suspension system driving mode control system, comprising: the driving mode control unit DMS and the engine management system EMS are respectively in communication connection with the semi-active suspension system whole vehicle control DMS controller, the semi-active suspension system whole vehicle control DMS controller is electrically connected with the semi-active suspension electromagnetic valve, and the semi-active suspension electromagnetic valve is connected with the semi-active suspension system combined closed loop.
2. A driving mode control method of a semi-active suspension system is characterized in that a driving mode control unit DMS judges according to an EMS signal of an engine management system and outputs voltage to control a suspension electromagnetic valve to be powered on and powered off, and the stiffness damping of the semi-active suspension is switched.
3. The method for controlling the driving mode of a semi-active suspension system according to claim 2, wherein the driving mode control unit DMS recognizes an IGON signal, a vehicle speed vehicle=0, and an engineering speed=0, and the driving mode control unit DMS controls the semi-active suspension to be turned on, and the semi-active suspension system adopts a high-stiffness high-damping mode, and is powered off after recognizing a running signal for 3 s.
4. The method according to claim 2, wherein the driving mode control unit DMS identifies the vehicle speed and the engine speed, vehicle speed=0, engine speed > 0, engine speed < 7000rpm, after the driving mode control unit DMS identifies that the running signal is continuously started for 3s, and the driving mode control unit DMS controls the semi-active suspension.
5. The method according to claim 2, wherein the driving mode control unit DMS recognizes a running signal, vehicle speed is not equal to 0, vehicle speed is less than 20Km/h, engine speed is less than 1900rpm, and the driving mode control unit DMS controls the semi-active suspension.
6. The method of claim 2, wherein the driving mode control unit DMS recognizes a running signal, vehicle speed is not equal to 0, vehicle speed is not less than 15Km/h, and vehicle speed is not less than 1900rpm, and the driving mode control unit DMS controls the semi-active suspension.
7. The method of claim 2, wherein the driving mode control unit DMS recognizes a running signal, vehicle > 20KM/h, and vehicle is less than 7000rpm, and the driving mode control unit DMS controls the semi-active suspension.
8. The method for controlling the driving mode of the semi-active suspension system according to claim 2, wherein the driving mode control unit DMS recognizes running signals, idle speed of the water temperature and the heat engine of the engine, start, stop, start with a small accelerator, low speed over-threshold and acceleration and deceleration conditions, and in the process of switching the vehicle conditions, the DMSCU is required to maintain the control state of the previous condition on the suspension, and when the condition of entering the next condition is judged to be met, the suspension is controlled according to the requirement of the next condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310707841.5A CN116872706A (en) | 2023-06-15 | 2023-06-15 | Driving mode control system and method for semi-active suspension system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310707841.5A CN116872706A (en) | 2023-06-15 | 2023-06-15 | Driving mode control system and method for semi-active suspension system |
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| Publication Number | Publication Date |
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| CN116872706A true CN116872706A (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310707841.5A Pending CN116872706A (en) | 2023-06-15 | 2023-06-15 | Driving mode control system and method for semi-active suspension system |
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| Country | Link |
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| CN (1) | CN116872706A (en) |
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- 2023-06-15 CN CN202310707841.5A patent/CN116872706A/en active Pending
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