Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions
The basic malfunction of automatic transmissions (ATs) is oil flow through hydraulic precision pair clearances called an “internal leakage”, leading to difficulties in controlling the AT. There are no sufficiently accurate methods for assessing the impact of “internal leakage” on the AT technical co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/22/7667 |
| _version_ | 1797459416083070976 |
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| author | Tadeusz Dziubak Paweł Szczepaniak |
| author_facet | Tadeusz Dziubak Paweł Szczepaniak |
| author_sort | Tadeusz Dziubak |
| collection | DOAJ |
| description | The basic malfunction of automatic transmissions (ATs) is oil flow through hydraulic precision pair clearances called an “internal leakage”, leading to difficulties in controlling the AT. There are no sufficiently accurate methods for assessing the impact of “internal leakage” on the AT technical condition in the course of operation. A proprietary hydraulic precision pair internal leak flow model has been proposed in the paper. The novelty of the model is applying electro-hydraulic controller precision pair clearance values as data that was determined through measurements involving an actual object with a specific AT operation period. The authors conduct variant tests of the model to determine the total AT hydraulic system controller leakage. Reduced oil viscosity (approx. 20%) results in internal leakage increasing by 25%. Significant wear of the controller’s precision pair and increased oil temperature (above 80 °C) lead to internal leakage increasing by more than 50% and oil pressure decreasing below the permissible value. |
| first_indexed | 2024-03-09T16:51:55Z |
| format | Article |
| id | doaj.art-98ef6fded9eb4266872bb43f2b008b75 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T16:51:55Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-98ef6fded9eb4266872bb43f2b008b752023-11-24T14:40:46ZengMDPI AGEnergies1996-10732023-11-011622766710.3390/en16227667Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating ConditionsTadeusz Dziubak0Paweł Szczepaniak1Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, PolandAir Force Institute of Technology, 6 Księcia Bolesława St., 01-494 Warsaw, PolandThe basic malfunction of automatic transmissions (ATs) is oil flow through hydraulic precision pair clearances called an “internal leakage”, leading to difficulties in controlling the AT. There are no sufficiently accurate methods for assessing the impact of “internal leakage” on the AT technical condition in the course of operation. A proprietary hydraulic precision pair internal leak flow model has been proposed in the paper. The novelty of the model is applying electro-hydraulic controller precision pair clearance values as data that was determined through measurements involving an actual object with a specific AT operation period. The authors conduct variant tests of the model to determine the total AT hydraulic system controller leakage. Reduced oil viscosity (approx. 20%) results in internal leakage increasing by 25%. Significant wear of the controller’s precision pair and increased oil temperature (above 80 °C) lead to internal leakage increasing by more than 50% and oil pressure decreasing below the permissible value.https://www.mdpi.com/1996-1073/16/22/7667automatic transmissions (AT)electro-hydraulic controllerhydraulic precision pairinternal leakageoil flow rate model |
| spellingShingle | Tadeusz Dziubak Paweł Szczepaniak Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions Energies automatic transmissions (AT) electro-hydraulic controller hydraulic precision pair internal leakage oil flow rate model |
| title | Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions |
| title_full | Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions |
| title_fullStr | Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions |
| title_full_unstemmed | Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions |
| title_short | Modelling Internal Leakage in the Automatic Transmission Electro-Hydraulic Controller, Taking into Account Operating Conditions |
| title_sort | modelling internal leakage in the automatic transmission electro hydraulic controller taking into account operating conditions |
| topic | automatic transmissions (AT) electro-hydraulic controller hydraulic precision pair internal leakage oil flow rate model |
| url | https://www.mdpi.com/1996-1073/16/22/7667 |
| work_keys_str_mv | AT tadeuszdziubak modellinginternalleakageintheautomatictransmissionelectrohydrauliccontrollertakingintoaccountoperatingconditions AT pawełszczepaniak modellinginternalleakageintheautomatictransmissionelectrohydrauliccontrollertakingintoaccountoperatingconditions |