Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load
Modern high-torque low-speed internal combustion engines (ICEs) generate torsional vibrations close in disturbance frequency to gearboxes natural oscillation frequencies. Effective absorption of such oscillations requires a new torsional vibration damper between the internal combustion engine and ge...
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| Format: | Article |
| Language: | English |
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Lviv Polytechnic National University
2022-06-01
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| Series: | Transport Technologies |
| Subjects: | |
| Online Access: | https://science.lpnu.ua/tt/all-volumes-and-issues/volume-3-number-1-2022/influence-vehicle-acceleration-intensity-dual-mass |
| _version_ | 1797855962891026432 |
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| author | Bohdan Kindratskyy Roman Litvin Oleksiy Osmak |
| author_facet | Bohdan Kindratskyy Roman Litvin Oleksiy Osmak |
| author_sort | Bohdan Kindratskyy |
| collection | DOAJ |
| description | Modern high-torque low-speed internal combustion engines (ICEs) generate torsional vibrations close in disturbance frequency to gearboxes natural oscillation frequencies. Effective absorption of such oscillations requires a new torsional vibration damper between the internal combustion engine and gearbox design, which is implemented in the form of a dual-mass flywheel (DMF). One of the main reasons for DMF failure is its spring components destruction. The article develops mathematical and simulation (in MATLAB Simulink environment) model of a car with DMF in the period of starting, which takes into account the dependence of torque and power of the internal combustion engine on the number of the crankshaft revolutions and uneven rotation, car inertial and stiffness parameters, road resistance. It is established that when the car starts in first gear, the maximum load on spring components of DMF and transmission occurs at the initial moment of clutch engagement and exceeds the maximum effective torque of the internal combustion engine 1.6 times, has a pronounced oscillatory character and stabilizes as the car accelerates. With smooth acceleration of a car, when torque of internal combustion engine reaches, but does not exceed its maximum value of 250 N‧m, elastic moment in transmission components is stabilized at 230 N‧m. During intensive acceleration and transition through the extremum on torque curve of internal combustion engine on number of crankshaft revolution, the maximum DMF spring components and transmission load initially doesn’t change significantly, but reduces the duration of oscillatory processes and elastic moment of 160 N·m after attenuation of oscillations. A similar nature of stress changes is observed in the elastic links of DMF, which eventually leads to their fatigue failure and DMF failure.
To increase a DMF service life, it is advisable to accelerate a car when moving intensively, bringing a number of revolutions to a value that is located at the extreme of torque of internal combustion engine on its performance characteristic, followed by switching to the next gear. |
| first_indexed | 2024-04-09T20:32:38Z |
| format | Article |
| id | doaj.art-b317e7c3b6a64508a3c7c0b716b0b809 |
| institution | Directory Open Access Journal |
| issn | 2708-2199 2709-5223 |
| language | English |
| last_indexed | 2024-04-09T20:32:38Z |
| publishDate | 2022-06-01 |
| publisher | Lviv Polytechnic National University |
| record_format | Article |
| series | Transport Technologies |
| spelling | doaj.art-b317e7c3b6a64508a3c7c0b716b0b8092023-03-30T14:39:09ZengLviv Polytechnic National UniversityTransport Technologies2708-21992709-52232022-06-0131657610.23939/tt2022.01.065Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission loadBohdan Kindratskyy0https://orcid.org/0000-0001-6761-0223Roman Litvin1https://orcid.org/0000-0002-4418-5970Oleksiy Osmak2https://orcid.org/0000-0003-4526-4184Lviv Polytechnic National UniversityLviv Polytechnic National UniversityLviv Polytechnic National UniversityModern high-torque low-speed internal combustion engines (ICEs) generate torsional vibrations close in disturbance frequency to gearboxes natural oscillation frequencies. Effective absorption of such oscillations requires a new torsional vibration damper between the internal combustion engine and gearbox design, which is implemented in the form of a dual-mass flywheel (DMF). One of the main reasons for DMF failure is its spring components destruction. The article develops mathematical and simulation (in MATLAB Simulink environment) model of a car with DMF in the period of starting, which takes into account the dependence of torque and power of the internal combustion engine on the number of the crankshaft revolutions and uneven rotation, car inertial and stiffness parameters, road resistance. It is established that when the car starts in first gear, the maximum load on spring components of DMF and transmission occurs at the initial moment of clutch engagement and exceeds the maximum effective torque of the internal combustion engine 1.6 times, has a pronounced oscillatory character and stabilizes as the car accelerates. With smooth acceleration of a car, when torque of internal combustion engine reaches, but does not exceed its maximum value of 250 N‧m, elastic moment in transmission components is stabilized at 230 N‧m. During intensive acceleration and transition through the extremum on torque curve of internal combustion engine on number of crankshaft revolution, the maximum DMF spring components and transmission load initially doesn’t change significantly, but reduces the duration of oscillatory processes and elastic moment of 160 N·m after attenuation of oscillations. A similar nature of stress changes is observed in the elastic links of DMF, which eventually leads to their fatigue failure and DMF failure. To increase a DMF service life, it is advisable to accelerate a car when moving intensively, bringing a number of revolutions to a value that is located at the extreme of torque of internal combustion engine on its performance characteristic, followed by switching to the next gear.https://science.lpnu.ua/tt/all-volumes-and-issues/volume-3-number-1-2022/influence-vehicle-acceleration-intensity-dual-masstransmissiondual-mass flywheeldynamic modelmathematical modelsimulation modeltorque |
| spellingShingle | Bohdan Kindratskyy Roman Litvin Oleksiy Osmak Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load Transport Technologies transmission dual-mass flywheel dynamic model mathematical model simulation model torque |
| title | Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load |
| title_full | Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load |
| title_fullStr | Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load |
| title_full_unstemmed | Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load |
| title_short | Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load |
| title_sort | influence of vehicle acceleration intensity on dual mass flywheel elements and transmission load |
| topic | transmission dual-mass flywheel dynamic model mathematical model simulation model torque |
| url | https://science.lpnu.ua/tt/all-volumes-and-issues/volume-3-number-1-2022/influence-vehicle-acceleration-intensity-dual-mass |
| work_keys_str_mv | AT bohdankindratskyy influenceofvehicleaccelerationintensityondualmassflywheelelementsandtransmissionload AT romanlitvin influenceofvehicleaccelerationintensityondualmassflywheelelementsandtransmissionload AT oleksiyosmak influenceofvehicleaccelerationintensityondualmassflywheelelementsandtransmissionload |