Prospective Evaluation of the Collision Severity L7e Vehicles Considering a Collision Mitigation System

Kolk, Harald; Stefan, Kirschbichler; Tomasch, Ernst; Hoschopf, Heinz; Luttenberger, Peter; Sinz, Wolfgang

doi:10.1016/j.trpro.2016.05.474

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…Recently, the vacuum booster is increasingly not only a device for reducing the force on the brake pedal, but also an automatic device that corrects the actions of the driver (anti-lock braking system (ABS) and a motion stabilization system (ESP) [11], an emergency braking system Brake Assist (BAS) [12], etc. ), which simplifies driving (preventive safety systems [13], energy recovery systems in hybrid and electric vehicles [14,15], etc.). Therefore, improving the working process of the vacuum brake booster is the most important task to improve the active safety of the car.…”

Section: Introductionmentioning

confidence: 99%

Research of the vacuum brake booster working process

Sklyarov,

Shapovalov,

Chernenko

et al. 2024

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The creation of a laboratory installation was carried out with an aim to ensure the study of the working processes and characteristics of vacuum boosters as a part of hydraulic brake drives for vehicles with a gross weight of up to 3.5 tons for civilian usage, and armored vehicles with a gross weight of up to 8.5 tons designated for service and combat missions. Theoretical researches in this direction have been previously carried out by a number of scientists of the Department of “Automobiles” named after prof. Gredeskul A.B. in Kharkiv National Automobile and Road University, the results of which have been highlighted in a number of scientific papers. Comparison of the results of theoretical studies with the experimental ones, received on the laboratory setup and suggested in this paper, according to the experimental method described in the article, using the created electronic signal processing complex and sensor unit, made it possible to establish a discrepancy between theoretical and experimental studies within 6%. This complex for experimental research was created for the first time, thus allowing to obtain the results that confirm the theoretical studies of the vacuum boosters of the brake drive of cars, as well as revealed a number of dependencies between the weight and overall parameters of the under research unit, along with the number of functional relationships between the structural components of the vacuum boosters, which enables to significantly optimize its design.

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Section: Introductionmentioning

confidence: 99%

Research of the vacuum brake booster working process

Sklyarov,

Shapovalov,

Chernenko

et al. 2024

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“…By utilizing these load cases, it provides a preliminary consideration to future loading given the introduction of ADAS and the crash mitigation maneuvers at a component level in the operational environment. 36 Therefore, this article aims to extrapolate the efficacy of the structure designs and methodology for application to heavy quadricycles and pods.…”

Section: Introductionmentioning

confidence: 99%

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

Harrison

Christensen

Bastien

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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With the development and deployment of lightweight vehicles to the market, inclusive of autonomous pods, a review of advanced crashworthy structures and the design methodology has been conducted as it is thought that super-lightweight vehicles may pose significant risk to the occupants if they are involved in a crash. It is suggested that tests should include oblique and multiple velocity impacts to cater for the effects of assisted driving systems of future vehicles. A review of current crash structures and design methodologies revealed that the most recent research do not cater to multiple crash scenarios, nor a shorter crush allowance, therefore resulting in poor crashworthiness performance. In addition, the arbitrary seat positioning shown in autonomous pods’ concepts vastly increases the risk to occupants. Greater enhancements to passive crashworthiness are imperative. To this end, functionally graded vehicle structures should be designed as it has been found that these can provide optimized solutions. Research into nonlinear optimization methods for computationally expensive problems will become central to this.

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Estimating the effectiveness of electric vehicles braking when determining the circumstances of a traffic accident

Kashkanov,

Semenov,

Kashkanova

et al. 2023

Sci Rep

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In the vast majority of cases, the braking process is used to prevent traffic accidents. The effectiveness of this process depends on the design and functionality of vehicle braking systems (presence of anti-lock braking system, emergency braking system, preventive safety systems, etc.) and is limited by the amount of frictional forces in contact of tires with the road. The improvement of methodical approaches to evaluating the effectiveness of braking of cars contributes to increasing the accuracy and objectivity of establishing the circumstances of the occurrence of emergency situations. The paper analyses existing methods of evaluating the braking parameters of vehicles (including those with an electric drive) and modern methods of evaluating electric vehicle braking parameters and conducting auto-technical investigations of traffic accidents, which relate to using different methodological approaches and digital technologies at all stages of expert research. In contrast to existing models, the proposed mathematical model for estimating the trajectory of two-axle cars during braking allows for considering various types of input parameter uncertainty, reducing the range of possible modeling errors by 39%. Comparing simulation results and experimental data showed that the average relative error is 4.58%, and the maximum error did not exceed 7.82%. The performed study of the stability of the electric vehicles' movement during emergency braking with the help of developed mathematical models in the Mathcad software environment reveals the content of the algorithm of a similar calculation in specialized computer programs of auto technical examination. Conducting such calculations is relevant in the analysis of real accident situations, where specific circumstances and features that cannot be considered during modeling in specialized software must be taken into account. Simultaneously, the probability of type I errors is reduced by 2–19%, and type II errors are reduced by 43–68%.

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Prospective Evaluation of the Collision Severity L7e Vehicles Considering a Collision Mitigation System

Cited by 5 publications

References 1 publication

Research of the vacuum brake booster working process

Research of the vacuum brake booster working process

Crashworthy structures for future vehicle architecture of autonomous pods and heavy quadricycles on public roads: A review

Estimating the effectiveness of electric vehicles braking when determining the circumstances of a traffic accident

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