CN107132859B - Drive train torsional vibration control method for carrying wet type double-clutch transmission - Google Patents
Drive train torsional vibration control method for carrying wet type double-clutch transmission Download PDFInfo
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- CN107132859B CN107132859B CN201710184104.6A CN201710184104A CN107132859B CN 107132859 B CN107132859 B CN 107132859B CN 201710184104 A CN201710184104 A CN 201710184104A CN 107132859 B CN107132859 B CN 107132859B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
Abstract
The invention relates to a control method for torsional vibration of a transmission system carrying a wet double-clutch transmission, which comprises the following steps: 1. determining a torsional vibration point of a transmission system of the vehicle through a bench test, slowly increasing the rotating speed of an engine from an idle speed to a speed higher than that of the engine when the vehicle runs at the highest gear, and recording the range of the rotating speed of the engine when the transmission system vibrates in the process of increasing the rotating speed of the engine; 2. obtaining a target rotating speed difference value of each gear through an experiment bench or whole vehicle calibration; 3: and (3) inputting the engine rotating speed range and the target rotating speed difference compensation value when the transmission system vibrates into a transmission control unit, and compensating the corresponding target rotating speed difference compensation value in the step (2) when the rotating speed of the engine enters the tested rotating speed range at a certain gear in the running process of the whole vehicle. The torsional vibration problem of the transmission system is solved under the conditions that the whole vehicle arrangement of the transmission system is not adjusted and any vibration damper is not added.
Description
Technical Field
The invention belongs to the technical field of vehicle transmission system torsional vibration control, and relates to a transmission system torsional vibration control method for a wet double-clutch transmission.
Background
The transmission system comprises the wet double-clutch transmission, the power output by the power source is transmitted to the whole vehicle through the double-clutch transmission, and no requirement is imposed on a control method of the wet double-clutch transmission. The double-clutch target rotating speed difference value refers to a target rotating speed difference between a double-clutch driving disc and a double-clutch driven disc. In the running process of the whole vehicle, the vibration of a transmission system can generate noise, and meanwhile, if the frequency of the vibration of a traditional system is close to the vibration frequency of the whole vehicle or a certain accessory in the whole vehicle, the resonance of the whole vehicle can be caused and larger noise can be generated, and the generated noise and the resonance are transmitted to a cab, so that the driving comfort of the whole vehicle is greatly influenced. Because the precision of drive train part installation can not reach the requirement or the whole car use loss is great and leads to position between each part of drive train to change to and the mismatching of drive train arrangement and whole car suspension system etc. all can produce the torsional vibration of drive train, thereby influence the driving comfort of whole car. Therefore, the torsional vibration control of the whole vehicle transmission system plays a very important role in improving the driving comfort. The reason for the torsional vibration of the power train is many, and the torsional vibration of the power train has a specific frequency, so that it is difficult to accurately know the reason for the torsional vibration of the power train.
The publication CN1928387 realizes torsional vibration control by adding a torsional vibration damper between the engine and the transmission. The publication CN101042186 patent determines desired powertrain and driveline operating states and determines a plurality of operating state errors. Each torque-generative device is controlled based upon the operating state error and the operating mode of the transmission to reduce driveline vibrations. The publication CN101542162 controls driveline torsional vibration by adding a torsional vibration damper with an end block between the engine and the transmission. The patent publication CN101450617 is the control of driveline noise and torsional vibrations by adding a mass damper that provides noise and vibration damping over a wide frequency range. As described above, in the prior art, the purpose of vibration damping is achieved by additionally adding a vibration damping device, which increases the cost and the risk of damage.
Disclosure of Invention
The invention aims to provide a method for controlling torsional vibration of a transmission system carrying a wet type double-clutch transmission, which solves the torsional vibration problem of the transmission system under the conditions of not adjusting the whole vehicle arrangement of the transmission system and not increasing any damping device.
The purpose of the invention is realized by the following technical scheme:
a method for controlling torsional vibration of a transmission system carrying a wet type double clutch transmission comprises the following steps:
step 1: the driveline torsional vibration point of the vehicle was determined by bench testing:
a. slowly increasing the engine speed from idle speed to a speed greater than that when the vehicle runs at the highest gear, and recording the engine speed range [ n ] when the transmission system vibrates during the process of increasing the engine speed L-gear ,n H-gear ]；
b. Sequentially measuring the engine rotating speed ranges at the torsional vibration points of the transmission system of all gears according to the step a: [ n ] of L1 gear ,n H1 gear ]、[n L2 gear ,n H2 gear ]、[n L3 gear ,n H3 gear ]、[n L4 gear ,n H4 gear ]、[n L5 gear ,n H5 gear ]、[n L6 gear ,n H6 gear ]、[n L7 gear ,n H7 gear ]、[n LR gear ,n HR gear ]。
Step 2: obtaining the target rotating speed difference value of each gear through the calibration of an experiment bench or the whole vehicle: Δ n slip1 、Δn slip2 、Δn slip3 、Δn slip4 、Δn slip5 、Δn slip6 、Δn slip7 、Δn slipR ；
And step 3: and (3) inputting the engine rotating speed range and the target rotating speed difference compensation value of the drive system in vibration, which are obtained by testing in the step (1) and the step (2) on a bench test or a real vehicle, into a transmission control unit, and compensating the corresponding target rotating speed difference compensation value in the step (2) when the rotating speed of the engine enters the tested rotating speed range in a certain gear in the running process of the whole vehicle.
The invention has the following beneficial effects:
the method for controlling the torsional vibration of the transmission system can solve the problem of the torsional vibration of the transmission system by compensating the target rotating speed difference of the double clutches without increasing any vibration damper or changing the arrangement of the whole transmission system and the like under the condition that the accurate reason of the torsional vibration of the transmission system is unknown, and improves the driving comfort of the whole vehicle.
Drawings
FIG. 1 is a schematic diagram of a vehicle drive train configuration;
FIG. 2 is a flow chart of a method of driveline torsional vibration control with a wet dual clutch transmission;
FIG. 3 is a graph illustrating the effect of differential rotational speed on driveline torsional vibration.
Detailed Description
In order to clearly illustrate the technical mode of the invention, the following detailed description of the implementation of the control method of the invention is provided with the accompanying drawings.
As shown in fig. 1, the wet dual clutch transmission is a simplified transmission system with a wet dual clutch transmission, and the wet dual clutch transmission is located behind a power source of a whole vehicle and transmits power output by the power source to the whole vehicle. When the invention is used for carrying out the torsional vibration control of the transmission system, a test vehicle carrying a wet type double-clutch transmission system rack or a wet type double-clutch transmission system is required.
Example (b):
as shown in FIG. 2, the invention firstly determines the engine speed range at the torsional vibration point of the transmission system through a bench test, and then realizes the torsional vibration control of the transmission system through a method of compensating the target speed difference of the double clutches.
Step 1: the driveline torsional vibration point of the vehicle was determined by bench testing:
the engine speed of a normally driven test vehicle or an operation test bench is increased to 5000rpm from an idle speed, and in the process of increasing the engine speed, if the transmission system or the whole vehicle has torsional vibration, the engine speed when the torsional vibration begins and the engine speed when the torsional vibration disappears are recorded. Repeating the above process for 3 times, and confirming the engine rotation speed range at the torsional vibration point; according to the method, the engine speed ranges [ n ] at the torsional vibration points corresponding to all gears of the vehicle are sequentially confirmed L1 gear ,n H1 gear ]、[n L2 gear ,n H2 gear ]、[n L3 gear ,n H3 gear ]、[n L4 gear ,n H4 gear ]、[n L5 gear ,n H5 gear ]、[n L6 gear ,n H6 gear ]、[n L7 gear ,n H7 gear ]、[n LR gear ,n HR gear ]；
Step 2: obtaining target rotation of each gear by calibrating an experiment bench or a whole vehicleSpeed difference value: Δ n slip1 、Δn slip2 、Δn slip3 、Δn slip4 、Δn slip5 、Δn slip6 、Δn slip7 、Δn slipR ；
And step 3: and (3) inputting the engine rotating speed range and the target rotating speed difference compensation value of the drive system in vibration, which are obtained by the test in the step (1) and the step (2) on the bench test or the real vehicle, into a transmission control unit, and compensating the corresponding target rotating speed difference compensation value in the step (2) when the rotating speed of the engine enters the tested rotating speed range in a certain gear during the running process of the whole vehicle.
As shown in a test chart of the influence of the rotation speed difference on the torsional vibration of the transmission system in fig. 3, a torsional vibration point of the engine at 1400rpm is used for explanation, and different colors in the test chart represent vibration acceleration measured by NVH test equipment under different rotation speed differences; when the target rotating speed difference is 20rpm, the vibration acceleration is maximum, so that a driver and passengers feel uncomfortable and unacceptable; when the target rotating speed difference is compensated to 50rpm, the vibration acceleration is reduced, and the driver and the passengers have no resonance feeling and can accept the vibration acceleration; the result shows that the method provided by the invention can effectively reduce the torsional vibration of the transmission system.
Claims (1)
1. A drive train torsional vibration control method for a wet-type double-clutch transmission is characterized by comprising the following steps:
step 1, determining a torsional vibration point of a transmission system of a vehicle through a bench test:
a. the engine speed is slowly increased from the idle speed to be higher than the engine speed when the vehicle runs at the highest gear, and the engine speed range [ n ] when the transmission system vibrates is recorded in the process of increasing the engine speed L-gear ,n H-gear ]；
b. Sequentially measuring the engine rotating speed ranges at the torsional vibration points of the transmission system of all gears according to the step a: [ n ] of L1 gear ,n H1 gear ]、[n L2 gear ,n H2 gear ]、[n L3 gear ,n H3 gear ]、[n L4 gear ,n H4 gear ]、[n L5 gear ,n H5 gear ]、[n L6 gear ,n H6 gear ]、[n L7 gear ,n H7 gear ]、[n LR gear ,n HR gear ]；
Step 2, obtaining the target rotating speed difference value of each gear through the calibration of an experiment bench or the whole vehicle: Δ n slip1 、Δn slip2 、Δn slip3 、Δn slip4 、Δn slip5 、Δn slip6 、Δn slip7 、Δn slipR ；
And 3, inputting the engine rotating speed range and the target rotating speed difference compensation value obtained by the test on the bench test or the real vehicle in the step 1 and the step 2 during the vibration of the transmission system into a transmission control unit, and compensating the corresponding target rotating speed difference compensation value in the step 2 when the rotating speed of the engine enters the tested rotating speed range at a certain gear in the running process of the whole vehicle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184104.6A CN107132859B (en) | 2017-03-24 | 2017-03-24 | Drive train torsional vibration control method for carrying wet type double-clutch transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710184104.6A CN107132859B (en) | 2017-03-24 | 2017-03-24 | Drive train torsional vibration control method for carrying wet type double-clutch transmission |
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| CN107132859A CN107132859A (en) | 2017-09-05 |
| CN107132859B true CN107132859B (en) | 2023-04-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109282991B (en) * | 2018-11-20 | 2020-09-08 | 重庆长安汽车股份有限公司 | Torsional vibration testing method and system for DCT (discrete cosine transformation) vehicle type power transmission system |
| CN111891106B (en) * | 2020-07-29 | 2021-08-13 | 中国第一汽车股份有限公司 | Power assembly control method for reducing torsional vibration of transmission system |
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| CN104948728A (en) * | 2015-05-06 | 2015-09-30 | 中国第一汽车股份有限公司 | Method for controlling starting of automatic wet-type dual-clutch transmission |
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| DE102009012485A1 (en) * | 2009-03-12 | 2010-09-16 | Daimler Ag | Powertrain for hybrid drives and torsion dampers |
| US8639424B2 (en) * | 2011-11-03 | 2014-01-28 | GM Global Technology Operations LLC | System and method for controlling an automatic engine stop-start accumulator |
| CN104279311B (en) * | 2014-01-30 | 2015-11-25 | 比亚迪股份有限公司 | The controlling method of synchronizer and vehicle in vehicle |
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| CN104321553A (en) * | 2012-05-22 | 2015-01-28 | 舍弗勒技术有限两合公司 | Wet dual clutch |
| CN103674571A (en) * | 2014-01-03 | 2014-03-26 | 重庆市科学技术研究院 | Automatic transmission loading spectrum collecting and compiling method used for indoor bench test |
| CN104358861A (en) * | 2014-11-03 | 2015-02-18 | 昆山德拉特兰传动科技有限公司 | Semi-dry semi-wet double clutch and frequent starting working condition control method thereof |
| CN104948728A (en) * | 2015-05-06 | 2015-09-30 | 中国第一汽车股份有限公司 | Method for controlling starting of automatic wet-type dual-clutch transmission |
| CN105840808A (en) * | 2016-04-26 | 2016-08-10 | 中国第汽车股份有限公司 | Gear-shifting coordination control method for wet double-clutch automatic speed changer |
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