Study Focuses on Life Cycle Greenhouse Gas Impacts of a Connected and Automated SUV and Van
ANN ARBOR—A new U-M Center for Sustainable Systems (CSS) study published in Transportation Research Part D examines the life cycle greenhouse gas impacts of a connected and automated SUV and van.
As technological advancements progress, the automotive industry is getting closer to producing Level 4 connected and automated vehicles (CAVs). Market trends indicate that personal vehicle sales are moving towards sport utility vehicles (SUVs) and the increasing use of ridesourcing services.
Existing studies that evaluate the environmental impacts of CAV technology focus on light-duty passenger cars or sedans; little is known about its impact on sport utility vehicles (SUVs) and vans.
This study applies life cycle modeling methodology to understand greenhouse gas emissions and primary energy use of a CAV SUV and van deployed as a ridesource fleet vehicle.
The authors of the study conducted a life cycle assessment of Level 4 CAV subsystem components integrated into battery electric vehicle (BEV) and internal combustion engine vehicle (ICEV) platforms. Vehicle lifetime was modeled based on deployment as an automated taxi. This study explores impacts of weight, drag, and subsystem electricity demand relative to benefits of eco-driving, platooning, and intersection connectivity at the vehicle system-level.
The results of this research show that current automated vehicle technology does not provide a direct path to reducing vehicle life cycle GHG emissions. Nicholas Kemp, a recent SEAS graduate and lead author, indicates that “computing power requirements of the technology outweigh delivered benefits from increased driving efficiency for all vehicle types.”
The study also found that CAV shows an increase in primary energy use and GHG emissions (2.7 percent, 2.7 percent for BEV; 1.3 percent, 1.1 percent for ICEV) compared with non-CAV platforms. “Vehicle electrification and grid decarbonization are especially important in improving environmental performance for future CAV technology deployment,” adds Greg Keoleian, senior author and director of the CSS.
The study is authored by Nicholas J. Kemp, Gregory A. Keoleian, Xiaoyi He, and Akshat Kasliwal.
Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti wa Utafiti Kwa sababu ya maendeleo ya teknolojia, sekta ya magari inakaribia kuzalisha magari ya kiwango cha nne yaliyounganishwa na ya kiotomatiki. Mwelekeo wa soko unaonyesha kwamba mauzo ya magari ya kibinafsi yanaelekea kwa magari ya matumizi ya michezo (SUVs) na matumizi ya kuongezeka kwa huduma za usafiri. Uchunguzi wa sasa unaochunguza athari za mazingira za teknolojia ya CAV unazingatia magari ya kubeba abiria au sedans nyepesi; kidogo inajulikana juu ya athari zake kwa magari ya matumizi ya michezo (SUVs) na vans. Utafiti huu unatumia mbinu ya kuiga mzunguko wa maisha kuelewa uzalishaji wa gesi ya chafu na matumizi ya nishati ya msingi ya SUV ya CAV na van iliyotumiwa kama gari la meli ya ride. Kwa mujibu wa utafiti huo, sehemu ya mfumo wa CAV ya kiwango cha 4 imewekwa katika mifumo ya gari la umeme la betri (BEV) na gari la injini ya mwako wa ndani (ICEV). Maisha ya gari yaliundwa kulingana na kupelekwa kama teksi ya kiotomatiki. Utafiti huu unachunguza athari za uzito, kushinikiza, na mahitaji ya umeme ya mfumo mdogo kuhusiana na faida za kuendesha magari ya mazingira, kuendesha gari kwa msafara, na kuunganisha makutano katika kiwango cha mfumo wa gari. Matokeo ya utafiti huu yanaonyesha kuwa teknolojia ya sasa ya magari ya moja kwa moja haitoi njia ya moja kwa moja ya kupunguza uzalishaji wa gesi za chafu katika mzunguko wa maisha ya gari. Nicholas Kemp, mhitimu wa hivi karibuni wa SEAS na mwandishi mkuu, anaonyesha kwamba mahitaji ya nguvu ya kompyuta ya teknolojia hiyo yanazidi faida zilizotolewa kutoka kwa kuongeza ufanisi wa kuendesha gari kwa aina zote za magari, na utafiti huo pia uligundua kuwa CAV inaonyesha ongezeko la matumizi ya nishati ya msingi na uzalishaji wa gesi chafu (% 2.7 kwa BEV,% 1.3% kwa ICEV). "Utekelezaji wa umeme wa magari na kuondoa kaboni kwenye gridi ni muhimu sana katika kuboresha utendaji wa mazingira kwa utumiaji wa teknolojia ya CAV ya baadaye, "aongeza Greg Keoleian, mwandishi mwandamizi na mkurugenzi wa CSS. Utafiti huo umeandikwa na Nicholas J. Kemp, Gregory A. Keoleian, Xiaoyi He, na Akshat Kasliwal.