Untersuchungen zur kraftstoffoptimalen Betriebsweise von Parallelhybridfahrzeugen und darauf basierende Auslegung regelbasierter Betriebsstrategien

Görke, Daniel

doi:10.1007/978-3-658-14163-9

Cited by 15 publications

(8 citation statements)

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“…Principle DP (left) and ECMS with iteratively determined λ 0 (right) regarding SOC, based on [9,56]. For DP, the entire state space must be discretized to calculate the costs of any control and state combination.…”

Section: Equivalent Consumption Minimization Strategy (Ecms)mentioning

confidence: 99%

“…After the simulation run, the actual final SOC value is compared with the desired final SOC value. Depending on whether the SOC of the battery is too high or too low, λ 0 is adjusted accordingly and the cycle is run again, until a suitable λ 0 is found [9,56]. Table 2 lists the minimum CO 2 emissions for the 12 real driving cycles for both the DP and the Offline ECMS including λ 0 .…”

Section: Global Optimum-dynamic Programming Vs Offline Ecms Unlimited...mentioning

confidence: 99%

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Optimal Control of Electrified Powertrains in Offline and Online Application Concerning Dimensioning of Li-Ion Batteries

2022

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Various energy management systems (driving strategies) have been developed to improve the efficiency of electrified vehicle drives. These include strategies from the field of offline optimization to determine the theoretical optimum for a given system, as well as online strategies designed for an on-board application in the vehicle. In this paper, investigations are performed on an SUV electrified by a 48 V hybrid system in P14 topology regarding both offline and online strategies. To calculate the global optimum, the performance of Dynamic Programming (DP) compared to an Equivalent Consumption Minimization Strategy (ECMS) with an iteratively determined equivalence factor is shown. Furthermore, with regard to online energy management strategies (EMS), it is presented how a predictive Online ECMS achieves additional fuel savings compared to a robust, non-predictive implementation. The simulation-based vehicle development allows detailed investigations regarding interactions between battery requirements and EMS. In this context, it is shown how various battery capacities are exploited by the discussed EMS.

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Section: Equivalent Consumption Minimization Strategy (Ecms)mentioning

confidence: 99%

Section: Global Optimum-dynamic Programming Vs Offline Ecms Unlimited...mentioning

confidence: 99%

Optimal Control of Electrified Powertrains in Offline and Online Application Concerning Dimensioning of Li-Ion Batteries

2022

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“…The investigated vehicle is a compact front-wheel-drive car with plug-in hybrid architecture (PHEV). The powertrain topology of the vehicle, which is shown in Figure 2, is designed as a P2 parallel hybrid, 33 which means that the ICE and the EM can be coupled or decoupled via a clutch (C0) in order to avoid ICE friction losses during electric driving operation, coasting, or regenerative braking. Table 1 shows the main characteristics of the vehicle.…”

Section: Measurement Setupmentioning

confidence: 99%

A case study on particulate emissions from a gasoline plug-in hybrid electric vehicle during engine warm-up, taking into account start–stop operation

Lenz

Cremer

Guse

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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Concerning the discussions about emissions caused by individual mobility, it is foreseeable that future vehicle concepts will increasingly be based on hybrid powertrains. These systems lead to more complex operating scenarios, which have a significant influence on the resulting emissions of the engine. This work shows a case study and the results in the operation and emission behavior of a plug-in hybrid electric vehicle with a direct injection gasoline engine when operated in an internationally recognized driving cycle. The vehicle’s exhaust aftertreatment system consists of a three-way catalytic converter; a particulate filter is not installed. The emissions are analyzed with a focus on particulate number emissions (from soot), especially during the warm-up phase and the frequent start–stop events (in total, there are 12 internal combustion engine operating phases), which are typical for hybrid vehicles. The results show that approximately 50% of the emitted particulates have a smaller size, 23 nm (a very high number of particulates with a mean size of 10 to 15 nm are present), which are currently not regulated, but are expected to have a high risk of adverse health effects.

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“…In order to model the exact power flow in the powertrain, a longitudinal dynamics simulation is sufficient when considering normal road traffic [18], whereas only the vehicle speed and thus the acceleration in the direction of travel are taken into account. Only in the application case of motorsports do the lateral dynamics of the vehicle have a significant influence on driving behavior and powertrain [19].…”

Section: Vehicle Modelingmentioning

confidence: 99%

Dependency of Machine Efficiency on the Thermal Behavior of Induction Machines

et al. 2020

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The consideration of the thermal behavior of electric machines is becoming increasingly important in the machine design for electric vehicles due to the adaptation to more dynamic operating points compared to stationary applications. Whereas, the dependency of machine efficiency on thermal behavior is caused due to the impact of temperature on the resulting loss types. This leads to a shift of efficiency areas in the efficiency diagram of electric machines and has a significant impact on the maximum load capability and an impact on the cycle efficiency during operation, resulting in a reduction in the overall range of the electric vehicle. Therefore, this article aims at analyzing the thermal load limits of induction machines in regard to actual operation using measured driving data of battery electric vehicles. For this, a thermal model is implemented using MATLAB® and investigations to the sensitivity of model parameters as well as analysis of the continuous load capacity, thermal load and efficiency in driving cycles under changing boundary conditions are conducted.

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Untersuchungen zur kraftstoffoptimalen Betriebsweise von Parallelhybridfahrzeugen und darauf basierende Auslegung regelbasierter Betriebsstrategien

Cited by 15 publications

References 0 publications

Optimal Control of Electrified Powertrains in Offline and Online Application Concerning Dimensioning of Li-Ion Batteries

Optimal Control of Electrified Powertrains in Offline and Online Application Concerning Dimensioning of Li-Ion Batteries

A case study on particulate emissions from a gasoline plug-in hybrid electric vehicle during engine warm-up, taking into account start–stop operation

Dependency of Machine Efficiency on the Thermal Behavior of Induction Machines

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