检索结果-南通市图书馆

Influence of driving cycles on exhaust emissions and fuel consumption of gasoline passenger car in Bangkok

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第5期21卷 604-611页

作者： NUTRAMON Tamsanya SUPACHART Chungpaibulpatana Sirindhorn International Institute of Technology Thammasat University

The influence of different driving cycles on their exhaust emissions and fuel consumption rate of gasoline passenger car was investigated in Bangkok based on the actual measurements obtained from a test vehicle driving on a standard chassis dynamometer. A newly established Bangkok driving cycle （BDC） and the European driving cycle （EDC） which is presently adopted as the legislative cycle for testing automobiles registered in Thailand were used. The newly developed BDC is constructed using the driving characteristic data obtained from the real on-road driving tests along selected traffic routes. A method for selecting appropriate road routes for real driving tests is also introduced. Variations of keyed driving parameters of BDC with different driving cycles were discussed. The results showed that the HC and CO emission factors of BDC are almost two and four times greater than those of EDC, respectively. Although the difference in the NOx emission factor is small, the value from BDC is still greater than that of EDC by 10%. Under BDC, the test vehicle consumes fuel about 25% more than it does under EDC. All these differences are mainly attributed to the greater proportion of idle periods and higher fluctuations of vehicle speed in the BDC cycle. This result indicated that the exhausted emissions and fuel consumption of vehicles obtained from tests under the legislative modal-type driving cycle （EDC） are significantly different from those actually produced under real traffic conditions especially during peak periods.

关键词： driving cycle driving pattern driving characteristics microtrip characteristics exhaust emissions fuel consumption

Design and fuel consumption Optimization for a Bio-Inspired Semi-floating Hybrid Vehicle

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2011年第3期8卷 280-287页

作者： Jiannan Luo Yansong Zhang School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China

Based on a bionic concept and combing air-cushion techniques and track driving mechanisms, a novel semi-floating hybrid concept vehicle is proposed to meet the transportation requirements on soft terrain. First, the vehicle scheme and its improved duel-spring flexible suspension design are described. Then, its fuel consumption model is proposed accordingly with respect to two vehicle operating parameters. Aiming at minimizing the fuel consumption, two Genetic Algorithms （GAs） are designed and implemented. For the initial one （GA-1）, despite getting an acceptable result, there still existed some problems in its optimiza- tion process. Based on an analysis of the defects of GA-1, an improved algorithm GA-2 was developed whose effectiveness and stability were embodied in the optimization process and results. The proposed design scheme and optimization approaches can provide valuable references for this new kind of vehicle with industry, military or scientific exploitations, etc. promising applications in the areas of agriculture, petroleum industry, military or scientific explaitations, etc.

关键词： bio-inspiration semi-floating hybrid vehicle concept model design fuel consumption genetic algorithm

Load reduction sintering for increasing productivity and decreasing fuel consumption

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 131-137页

作者： Hai-bin Zuo Jian-liang Zhang Zheng-wen Hu Tian-jun Yang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The technical and economical indexes and the physical properties of load reduction sintering processes with the supporting stands of installation at different height levels （300, 350, and 400 mm）： in a sintering bed were studied under the same conditions of raw material, bed height, and sintering parameters. Sintering pot tests with different bed heights and fuel ratios of the mixture with or without supporting stands were performed to decrease the fuel consumption. The airflow rate through the sintering bed was measured with an anemoscope fixed on the bed surface to reveal the effects of supporting stands. The utilization of load reduction sintering can improve the permeability of the sintering bed, and the airflow rate through the sintering bed is increased. When the stand height is half of the sintering bed, the productivity increases by 27.9%, and the drum index slightly decreases. Keeping at the same productivity level with normal sintering, the utilization of load reduction sintering can decrease the solid fuel consumption by 9.2%.

关键词： ore sintering permeability productivity fuel consumption

Variability of fuel consumption and CO_(2) emissions of a gasoline passenger car under multiple in-laboratory and on-road testing conditions

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第3期125卷 266-276页

作者： Boya Zhou Liqiang He Shijian Zhang Rui Wang Luowei Zhang Mengliang Li Yu Liu Shaojun Zhang Ye Wu Jiming Hao China Automotive Technology and Research Center Co. Ltd.Tianjin 300300China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Beijing Laboratory of Environmental Frontier Technologies School of EnvironmentTsinghua UniversityBeijing 100084China

An increasing divergence regarding fuel consumption(and/or CO_(2)emissions) between realworld and type-approval values for light-duty gasoline vehicles(LDGVs) has posed severe challenges to mitigating greenhouse gases(GHGs) and achieving carbon emissions peak and neutrality. To address this divergence issue, laboratory test cycles with more real-featured and transient traffic patterns have been developed recently, for example, the China Lightduty Vehicle Test Cycle for Passenger cars(CLTC-P). We collected fuel consumption and CO_(2)emissions data of a LDGV under various conditions based on laboratory chassis dynamometer and on-road tests. Laboratory results showed that both standard test cycles and setting methods of road load affected fuel consumption slightly, with variations of less than 4%. Compared to the type-approval value, laboratory and on-road fuel consumption of the tested LDGV over the CLTC-P increased by 9% and 34% under the reference condition(i.e., air conditioning off, automatic stop and start(STT) on and two passengers). On-road measurement results indicated that fuel consumption under the low-speed phase of the CLTC-P increased by 12% due to the STT off, although only a 4% increase on average over the entire cycle. More fuel consumption increases(52%) were attributed to air conditioning usage and full passenger capacity. Strong correlations(R2> 0.9) between relative fuel consumption and average speed were also identified. Under traffic congestion(average speed below 25 km/hr), fuel consumption was highly sensitive to changes in vehicle speed. Thus,we suggest that real-world driving conditions cannot be ignored when evaluating the fuel economy and GHGs reduction of LDGVs.

关键词： fuel consumption CO_(2)emissions Light-duty gasoline vehicle(LDGV) Real driving

Optimization of Engine Control Strategies for Low fuel consumption in Heavy-Duty Commercial Vehicles

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第12期137卷 2693-2714页

作者： Shuilong He Yang Liu Shanchao Wang Liangying Hu Fei Xiao Chao Li School of Mechanical and Electrical Engineering Guilin University of Electronic TechnologyGuilin541004China Technology Center of Commercial Vehicle Dongfeng Liuzhou Motor Co.Ltd.Liuzhou545005China

The reduction of fuel consumption in engines is always considered of vital *** these lines,in this work,this goal was attained by optimizing the heavy-duty commercial vehicle engine control *** specifically,at first,a general first principles model for heavy-duty commercial vehicles and a transient fuel consumptionmodel for heavy-duty commercial vehicles were developed and the parameters were adjusted to fit the empirical *** accuracy of the proposed modelwas demonstrated fromthe stage and the final ***,the control optimization problem resulting in low fuel consumption in heavy commercial vehicles was described,with minimal fuel usage as the optimization goal and throttle opening as the control ***,a time-continuous engine management approach was ***,the factors that influence low fuel consumption in heavy-duty commercial vehicles were systematically *** reduce the computing complexity,the control strategies related to the time constraints of the engine were parametrized using three different *** most effective solution was obtained by applying a global optimization strategy because the constrained optimization problem was ***,the effectiveness of the low-fuel consumption engine control strategy was demonstrated by comparing the simulated and field test results.

关键词： fuel consumption heavy-duty commercial vehicle engine control optimal control

Vehicle's fuel consumption of car-following models

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第5期56卷 1307-1312页

作者： TANG TieQiao LI JinGang WANG YunPeng YU GuiZhen School of Transportation Science and Engineering Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety ControlBeihang University

Many car-following models with their own merits have been proposed to explore various traffic problems,but researchers have rarely used vehicle's performance to evaluate *** this paper,we study each vehicle's fuel consumption of the optimal velocity model,full velocity difference model,full velocity and acceleration difference model and the car-following model with consideration of the traffic interruption probability under two traffic situations,*** numerical results show that the car-following model with consideration of traffic interruption probability can reduce vehicle's fuel consumption in the two studied traffic situations and thus improve the vehicle's fuel economy.

关键词： car-following model fuel consumption numerical test

Lower fuel consumption model and air-flow segregation feeding system for sintering

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2011年第6期18卷 1917-1923页

作者：江源黄柱成许斌姜涛 Civil & Environment and Engineering School University of Science and Technology Beijing China Nonferrous Metal Mining (Group) Co. Ltd. School of Minerals Processing and Bioengineering Central South University

In order to utilize the spontaneous accumulation of heat (SAH) reasonably and obtain the high quality sinter with low energy consumption, a lower fuel consumption modeling based on raw materials of a certain steel works was built. An air-flow segregation feeding (ASF) experimental equipment was designed to simulate strand feeding process and calculate the lower fuel consumption quantity. Compared with baseline test, the ASF experimental equipment was adopted. The results of sinter pot tests show that the solid fuel consumption is lower than that in baseline test, which is decreased by 5.8%. Meanwhile, other sinter indexes, such as pan yeild, tumbler strength and strand productivity are improved. The mineralogical examination indicates that the mineral compositions and micostructures are improved in sinter.

关键词： fuel consumption spontaneous accumulation of heat air-flow segregation feeding sinter

A discrete-event model to simulate the effect of truck bunching due to payload variance on cycle time, hauled mine materials and fuel consumption

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2016年第5期26卷 745-752页

作者： A.Soofastaei S.M.Aminossadati M.S.Kizil P.Knights School of Mechanical and Mining Engineering The University of Queensland

Data collected from truck payload management systems at various surface mines shows that the payload variance is significant and must be considered in analysing the mine productivity,energy consumption,greenhouse gas emissions and associated *** variance causes significant differences in gross vehicle *** loaded trucks travel slower up ramps than lightly loaded *** trucks are slowed by the presence of slower trucks,resulting in‘bunching’,production losses and increasing fuel *** paper simulates the truck bunching phenomena in large surface mines to improve truck and shovel systems’efficiency and minimise fuel *** study concentrated on completing a practical simulation model based on a discrete event method which is most commonly used in this field of research in other *** simulation model has been validated by a dataset collected from a large surface mine in Arizona state,*** results have shown that there is a good agreement between the actual and estimated values of investigated parameters.

关键词： Discrete-event model Simulation Truck bunching Payload variance Cycle time fuel consumption

Investigating the effects of gradual deployment of market penetration rates(MPR)of connected vehicles on delay time and fuel consumption

在线全文

学校读者我要写书评

暂无评论

Journal of Intelligent and Connected Vehicles 2022年第3期5卷 188-198页

作者： Alireza Ansariyar Milad Tahmasebi Department of Transportation and Urban Infrastructure Morgan State UniversityBaltimoreMarylandUSA Department of Civil and Environmental Engineering Northeastern University College of EngineeringBostonMassachusettsUSA

Purpose–This research paper aims to investigate the effects of gradual deployment of market penetration rates(MPR)of connected vehicles(MPR of CVs)on delay time and fuel ***/methodology/approach–A real-world origin-destination demand matrix survey was conducted in Boston,MA to identify the number of peak hour passing vehicles in the case ***–The results showed that as the number of CVs(MPR)in the network increases,the total delay time decreases by an average of 14%and the fuel consumption decreases by an average of 56%,respectively,from scenarios 3 to 15 compared to scenario *** limitations/implications–The first limitation of this study was considering a small *** considered network shows a small part of the case ***/value–This study can be a milestone for future research regarding gradual deployment of CVs’effects on transport *** policy(s)may define based on the results of this network for Brockton transport network.

关键词： Connected vehicles(CVs) V2X module AIMSUN microsimulation Market penetration rate of CV Delay time fuel consumption