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41.
B. Suh A. Frank Y. J. Chung E. Y. Lee Y. H. Chang S. B. Han 《International Journal of Automotive Technology》2010,11(4):555-563
This research is the first to develop a design for a powertain system of a plug-in parallel diesel hybrid electric bus equipped
with a continuously variable transmission (CVT) and presents a new design paradigm of the plug-in hybrid electric bus (HEB).
The criteria and method for selecting and sizing powertrain components equipped in the plug-in HEB are presented. The plug-in
HEB is designed to overcome the vulnerable limitations of driving range and performance of a purely electric vehicle (EV)
and to improve fuel economy and exhaust emissions of conventional bus and conventional HEBs. The control strategy of the complicated
connected propulsion system in the plug-in parallel HEB is one of the most significant factors in achieving higher fuel economy
and lower exhaust emissions of the HEV. In this research, a new optimal control strategy concept is proposed against existing
rule-based control strategies. The optimal powertrain control strategy is obtained through two steps of optimizations: tradeoff
optimization for emission control and energy flow optimization based on the instantaneous optimization technique. The proposed
powertrain control strategy has the flexibility to adapt to battery SOC, exhaust emission amount, classified driving pattern,
driving condition, and engine temperature. The objective of the optimal control strategy is to optimize the fuel consumption,
electricity use, and exhaust emissions proper to the performance targets. The proposed control strategy was simulated to prove
its validity by using analysis simulation tool ADVISOR (advanced vehicle simulator). 相似文献
42.
43.
Frank 《交通世界(建养机械)》2007,150(6):104
康明斯日前联手戴克公司和美国联邦环保署(EPA),共同在美国首都华盛顿向业界展示了当前全球排放最低、功率最强而且噪音最低的6.7升涡轮增压柴油机,这款新一代发动机专为克莱斯勒公司的2500和3500型道奇公羊重型皮卡配套. 相似文献
44.
Abstract Since 1990s the liner shipping industry has faced a period of restructuring and consolidation, and been confronted with a continuing increase in container vessel scale. The impact of these changes is noticeable in trade patterns, cargo handling methods and shipping routes, in short ‘operations’. After listing factors influencing size, growth in container ship size is explained by economies of scale in deploying larger vessels. In order to quantify economies of scale, this paper uses the liner service cash flow model. A novelty in the model is the inclusion of +6000-20-foot Equivalent Unit (TEU) vessels and the distinction in costs between single and twin propeller units on ships. The results illustrate that scale economies have been – and will continue to be – the driving force behind the deployment of larger container vessels. The paper then assesses the link between ship size and operations, given current discussions about the increase in container vessel scale. It is found that (a) ship size and operations are linked; (b) optimal ship size depends on transport segment (deep-sea vs. short-sea shipping, SSS), terminal type (transhipment terminals vs. other terminals), trade lane (East-West vs. North-South trades) and technology; and (c) a ship optimal for one trade can be suboptimal for another. 相似文献
45.
Frank 《交通世界(建养机械)》2008,(16):74-74
装备两台康明斯-水星QSC型8.3升540马力全电控船用发动机、燃用B100生物柴油(100%的生物柴油)的“环球竞赛号(Earthrace)”高速环保机动船6月27日抵达西班牙萨贡托港,结束了为期60天23小时49分钟的环球航程,从而打破英国高速船“大东电报号(Cable&Wireless)”十年前创下的74天20小时58分钟纪录。 相似文献
46.
Frank 《交通世界(建养机械)》2008,(24):78-78
康明斯公司日前发布了三季度财务公报,销售额和利润再创新高。三季度的大好形势主要归因于国际业务的强劲增势.有效抵消了北美消费品市场持续走低和欧洲市场疲软带来的负面影响。 相似文献
47.
Vaubel Ulrich Barsness Richard W. Saltzman Arthur Haight Frank Prestwood Smith Paul Brown Peter 《Transportation》1974,3(2):185-192
48.
Yuhwa Lee Simon Washington Lawrence D. Frank 《Transportation Research Part A: Policy and Practice》2009,43(4):360-373
A substantial body of research is focused on understanding the relationships between socio-demographics, land-use characteristics, and mode specific attributes on travel mode choice and time-use patterns. Residential and commercial densities, inter-mixing of land uses, and route directness in conjunction with transportation performance characteristics interact to influence accessibility to destinations as well as time spent traveling and engaging in activities. This study uniquely examines the activity durations undertaken for out-of-home subsistence; maintenance, and discretionary activities. Also examined are total tour durations (summing all activity categories within a tour). Cross-sectional activities are obtained from household activity travel survey data from the Atlanta Metropolitan Region. Time durations allocated to weekdays and weekends are compared. The censoring and endogeneity between activity categories and within individuals are captured using multiple equations Tobit models.The analysis and modeling reveal that land-use characteristics such as net residential density and the number of commercial parcels within a kilometer of a residence are associated with differences in weekday and weekend time-use allocations. Household type and structure are significant predictors across the three activity categories, but not for overall travel times. Tour characteristics such as time-of-day and primary travel mode of the tours also affect traveler’s out-of-home activity-tour time-use patterns. 相似文献
49.
Frank 《交通世界(建养机械)》2008,(5):122-123
2008年2月14日,康明斯公司公布了2007年度公司财务报告,销售额和利润再创新高,连续四年保持高速增长,美国以外的国际业务占到54%,中国区增长50%。 相似文献
50.
Frank 《交通世界(建养机械)》2008,(10):63-63
美国《汽车新闻》杂志日前在底特律举行典礼.颁发2008年度“一级供应商杰出贡献奖”(PACEAWARD).康明斯公司为克莱斯勒道奇公羊重型皮卡车研制开发的6.7升直列六缸全电控涡轮增压柴油机喜获其中的“产品创新奖”。 相似文献