Design of Drive Cycle for Electric Powertrain Testing

Borgia, Fabio; Samuel, Stephen

doi:10.4271/2023-01-0482

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…The cycles were named SEVCI and SEVCH drive cycles, with 'I' representing intermediate and 'H' representing harsh. It was also discovered that the time spent during acceleration and deceleration was less than that of CVs, resulting in less average acceleration overall [71]. It is suggested that regenerative braking in EVs can contribute to this, as this phenomenon provides more constant braking or deceleration behaviour compared to purely using frictional brakes [71].…”

Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

“…It was also discovered that the time spent during acceleration and deceleration was less than that of CVs, resulting in less average acceleration overall [71]. It is suggested that regenerative braking in EVs can contribute to this, as this phenomenon provides more constant braking or deceleration behaviour compared to purely using frictional brakes [71]. In addition, it is suggested that the instant torque behaviour of electric motors assists in faster acceleration times, which brings a vehicle to constant cruising quicker, resulting in shorter acceleration times.…”

Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

“…An interesting finding from the formulated drive cycles is that, when using the SEVCI drive cycle for the range estimation of the Renault Zoe, the result is similar to that of the WLTP, suggesting that conventional drive cycles may provide accurate range estimation for EVs. It was later debunked in the paper that this is a 'coincidence' [71]. It is suggested that the shorter highway driving duration of the WLTP balances out the shorter acceleration times of the SEVCI drive cycle.…”

Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

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A Review of Drive Cycles for Electrochemical Propulsion

Yang,

Millichamp,

Suter

et al. 2023

Energies

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Automotive drive cycles have existed since the 1960s. They started as requirements as being solely used for emissions testing. During the past decade, they became popular with scientists and researchers in the testing of electrochemical vehicles and power devices. They help simulate realistic driving scenarios anywhere from system to component-level design. This paper aims to discuss the complete history of these drive cycles and their validity when used in an electrochemical propulsion scenario, namely with the use of proton exchange membrane fuel cells (PEMFC) and lithium-ion batteries. The differences between two categories of drive cycles, modal and transient, were compared; and further discussion was provided on why electrochemical vehicles need to be designed and engineered with transient drive cycles instead of modal. Road-going passenger vehicles are the main focus of this piece. Similarities and differences between aviation and marine drive cycles are briefly mentioned and compared and contrasted with road cycles. The construction of drive cycles and how they can be transformed into a ‘power cycle’ for electrochemical device sizing purposes for electrochemical vehicles are outlined; in addition, how one can use power cycles to size electrochemical vehicles of various vehicle architectures are suggested, with detailed explanations and comparisons of these architectures. A concern with using conventional drive cycles for electrochemical vehicles is that these types of vehicles behave differently compared to combustion-powered vehicles, due to the use of electrical motors rather than internal combustion engines, causing different vehicle behaviours and dynamics. The challenges, concerns, and validity of utilising ‘general use’ drive cycles for electrochemical purposes are discussed and critiqued.

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Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

Section: Using Power Cycles As a Sizing Tool For Electric And Hybrid ...mentioning

confidence: 99%

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A Review of Drive Cycles for Electrochemical Propulsion

Yang,

Millichamp,

Suter

et al. 2023

Energies

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Online Identification of Vehicle Driving Conditions Using Machine-Learned Clusters

Marrone,

Kwok,

Fraser

2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Modern electrified vehicles rely on drivers to manually adjust control parameters to modify the vehicle's powertrain, such as regenerative braking strength selection or drive mode selection. However, this reliance on infrequent driver input may lead to a mismatch between the selected powertrain control modifiers and the true driving environment. It is therefore advantageous for an electric vehicle's powertrain controller to make online identifications of the current driving conditions. This paper proposes an online driving condition identification scheme that labels drive cycle intervals collected in real-time based on a clustering model, with the objective of informing adaptive powertrain control strategies. HDBSCAN and K-means clustering models are fitted to a data set of drive cycle intervals representing a full range of characteristic driving conditions. The cluster centroids are recorded and used in a vehicle controller to assign driving condition identification labels to the most recently recorded interval of vehicle data. The accuracy of the driving condition identifications of each model is compared by deploying the online identification scheme on the powertrain controller of an electrified vehicle and performing a real-world drive cycle of known driving conditions. The HDBSCAN clusters resulted in superior online driving condition identifications compared to alternative schemes. The main contribution of this paper is the novel application of clustering in an online identification scheme for use in a real-world embedded vehicle controller. By enabling accurate online identification of driving conditions, this approach can improve the powertrain control strategies of electrified vehicles and enhance the driving experience. Future research can leverage the online identification of driving conditions and explore the use of subsequent adaptive control schemes for reducing energy consumption, enhancing safety, and advancing the development of intelligent transportation systems.</div></div>

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Design of Drive Cycle for Electric Powertrain Testing

Cited by 2 publications

References 15 publications

A Review of Drive Cycles for Electrochemical Propulsion

A Review of Drive Cycles for Electrochemical Propulsion

Online Identification of Vehicle Driving Conditions Using Machine-Learned Clusters

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