Optimal gearshift control for a novel hybrid electric drivetrain

Gavgani, Arash Mehdizadeh; Sorniotti, Aldo; Doherty, John J.; Cavallino, Carlo

doi:10.1016/j.mechmachtheory.2016.06.016

Cited by 16 publications

(16 citation statements)

References 7 publications

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“…The HAMT [7,8] includes six gears that are associated with the ICE, and two gears that are associated with the EM. The choice of six ICE gear ratios in the HAMT, rather than the seven gear ratios of the DCT, is the consequence of a vehicle simulation based design process of the transmission, aimed at achieving mechanical simplification and high efficiency, without compromising the longitudinal acceleration and fuel consumption.…”

Section: The Case Study Transmissionsmentioning

confidence: 99%

“…The main assumptions are: i) the reference vehicle speed, , can be continuously achieved, which is verified for the driving cycles of this study and the adopted vehicle parameters; ii) tire slip is neglected, which is a reasonable approximation in the normal driving conditions typical of standardized driving cycles, see also the specific power loss studies in [10,11]; and iii) the gearshifts occur instantaneously without energy dissipations. Further details of the actual gearshift process for the two transmissions are provided in [7] and [8], where the latter includes a gearshift controller for the minimization of the clutch energy dissipation.…”

Section: A Simulation Modelmentioning

confidence: 99%

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A novel hybridized automated manual transmission for high performance cars

Vacca

Capilli

Sorniotti

et al. 2018

2018 IEEE 15th International Workshop on Advanced Motion Control (AMC)

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Abstract-Because of the introduction of progressively more restrictive regulations that aim to reduce fuel consumption and CO2 emissions, the automotive industry is focusing its efforts on environmentally friendly passenger cars. In particular, different electrification roadmaps are pursued by the individual car makers, and electrified drivetrain layouts are progressively introduced into the market. This process involves all vehicle segments, including high performance passenger cars. In this context, this study presents a novel hybridized automated manual transmission (HAMT) for cars with high power characteristics. The HAMT includes six gear ratios associated with the internal combustion engine, and two gear ratios associated with an electric motor. The energy efficiency of the HAMT is measured on a drivetrain test rig, and compared with that of an equivalent dual clutch transmission (DCT). Simulation results based on the experimentally measured efficiency maps show the significant energy consumption reduction of the HAMT in its internal combustion engine mode, with respect to the DCT.

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Section: The Case Study Transmissionsmentioning

confidence: 99%

Section: A Simulation Modelmentioning

confidence: 99%

A novel hybridized automated manual transmission for high performance cars

Vacca

Capilli

Sorniotti

et al. 2018

2018 IEEE 15th International Workshop on Advanced Motion Control (AMC)

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show abstract

“…Mehka logika se uporablja na veliko različnih področjih kot so: aeronavtična industrija [10], avtomobilska industrija (prestavljanje menjalnika [5], strategija nadzora električnega vozila [9]), medicina (večnamenska kontrola anestezije, nadzorovanje arterijskega tlaka med anestezijo) [17], nadzorovanje polnjenja in praznjenja baterij [12], procesiranje slik v industriji [1] inše na mnogih drugih.…”

Section: Uvodunclassified

Regulacija plovca v zračnem tunelu (zračna levitacija) na osnovi mehke logike

Bencak¹,

Sedonja²,

Picej³

et al. 2018

StuCoSReC. Proceedings of the 2018 5th Student Computer Science Research Conference.

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“…Gavgani et al [18,19] describe the details of the actual gear shift process for the DCT and HAMT. Assumptions (i) and (ii) do not imply significant errors in the fuel consumption results for the specific high-performance vehicle application.…”

Section: Dct Power Loss Contributions During Driving Cyclesmentioning

confidence: 99%

“…The appropriate control of the EM torque can 'fill in' the wheel torque gap. The mathematical description of the HAMT torque-fill function is provided by Gavgani et al [18,19], including gearshift simulations and experiments. De Pinto et al [16] present torque-fill controllers in electrified drivetrains, including gearshift performance indicators calculated during experimental gearshifts without and with EM torque-fill.…”

mentioning

confidence: 99%

On the Energy Efficiency of Dual Clutch Transmissions and Automated Manual Transmissions

et al. 2017

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Abstract:The main benefits of dual clutch transmissions (DCTs) are: (i) a higher energy efficiency than automatic transmission systems with torque converters; and (ii) the capability to fill the torque gap during gear shifts to allow seamless longitudinal acceleration profiles. Therefore, DCTs are viable alternatives to automated manual transmissions (AMTs). For vehicles equipped with engines that can generate considerable torque, large clutch-slip energy losses occur during power-on gear shifts and, as a result, DCTs need wet clutches for effective heat dissipation. This requirement substantially reduces DCT efficiency because of the churning and ancillary power dissipations associated with the wet clutch pack. To the knowledge of the authors, this study is the first to analyse the detailed power loss contributions of a DCT with wet clutches, and their relative significance along a set of driving cycles. Based on these results, a novel hybridised AMT (HAMT) with a single dry clutch and an electric motor is proposed for the same vehicle. The HAMT architecture combines the high mechanical efficiency typical of AMTs with a single dry clutch, with the torque-fill capability and operational flexibility allowed by the electric motor. The measured efficiency maps of a case study DCT and HAMT are compared. This is then complemented by the analysis of the respective fuel consumption along the driving cycles, which is simulated with an experimentally validated vehicle model. In its internal combustion engine mode, the HAMT reduces fuel consumption by >9% with respect to the DCT.

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Optimal gearshift control for a novel hybrid electric drivetrain

Cited by 16 publications

References 7 publications

A novel hybridized automated manual transmission for high performance cars

A novel hybridized automated manual transmission for high performance cars

Regulacija plovca v zračnem tunelu (zračna levitacija) na osnovi mehke logike

On the Energy Efficiency of Dual Clutch Transmissions and Automated Manual Transmissions

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