Fuel Consumption Improvement of Vehicles by Idling Stop

Matsuura, Moritaka; Korematsu, Koji; Tanaka, Junya

doi:10.4271/2004-01-1896

Cited by 32 publications

(11 citation statements)

References 3 publications

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“…The results indicate 5.3 % and 4 % of fuel economy improvement for the city and highway drive cycles respectively. The experiment of idling stop was even conducted on a conventional gasoline vehicle for studying its effect on fuel consumption by Matsuura, Korematsu and Tanaka [31]. They manually stopped the engine when the vehicle was stopped and restarted it when the vehicle was launched.…”

Section: Control Of Engine Start / Stopmentioning

confidence: 99%

Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy

Lee

Nelson

Lohse-Busch³

2009

SAE Technical Paper Series

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In the past few years, the price of petroleum based fuels, especially vehicle fuels such as gasoline and diesel, has been increasing at a significant rate. Consequently, there is much more consumer interest related to reducing fuel consumption for conventional vehicles and hybrid electric vehicles (HEVs) than in the past.The goal of many competitions and challenges held in North America and Europe is to achieve extremely low fuel consumption. A possible strategy to reduce fuel consumption is to use the vehicle's fuel converter such as an engine to accelerate the vehicle to a high speed and coast to a lower speed with the engine off. This method will reduce fuel flow to zero during the coast phase. Also, the vehicle uses higher power engine load to accelerate to the upper vehicle speed in a limited time, thus increasing the engine brake thermal efficiency. This strategy is known as "pulse and glide" or "burn and coast" in some references.In this study, the "pulse and glide" (PnG) method is first applied to a conventional vehicle to quantify the fuel consumption benefits when compared to steady speed conditions over the same distance. After that, an HEV is used as well to investigate if a hybrid system can further reduce fuel consumption with the proposed strategy. Note that the HEV used in this study has the advantage that the engine can be automatically shut off below a certain speed (~40 mph) at low loads, however a driver must shut off the engine manually in a conventional vehicle to apply this driving strategy.iii In this document, three preliminary results of the PnG driving strategy are presented; (1) improved fuel economy for a conventional vehicle from a simple spread sheet model, (2) improved fuel economy for an HEV from a dynamic vehicle simulation model (the Powertrain Analysis Toolkit (PSAT)) and (3) improved fuel economy for an HEV from vehicle testing at Argonne National Laboratory (ANL), all compared to steady speed conditions. The preliminary results show that the impact of engine load and kinetic energy stored in vehicle inertia is significant for fuel consumption using a PnG driving strategy compared to steady speed driving at the same average speed case. Especially, fuel economy can be improved at low speed range and higher acceleration because the aerodynamic drag force is smaller at low speed and the engine is running in a more efficient region for a short period of time respectively. In the last section, proposed directions of research are addressed based on the preliminary results.iv

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Section: Control Of Engine Start / Stopmentioning

confidence: 99%

Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy

Lee

Nelson

Lohse-Busch³

2009

SAE Technical Paper Series

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“…In this work, the comparative analysis between the results of fuel economy and tailpipe emissions with and without such engine temperature restriction will be carried out in the following section. Furthermore, the minimum time of engine turned off was set as 7 seconds, which is the effective idle time (break-even point for fuel efficiency), proposed by [36], for a similar engine as the one presented in this study.…”

Section: Driving Cyclementioning

confidence: 99%

Modelagem e simulação de um sistema start/stop para redução de consumo de combustível e emissões de gases poluentes

Silva¹,

Eckert²,

Silva³

et al. 2021

Blucher Engineering Proceedings

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In the last decades, energy-efficient road transportation has become one of the major concerns of many countries worldwide. Governmental regulation standards are progressively strict with respect to the maximization of vehicle fuel economy as well as the mitigation of tailpipe emissions. In this scenario, the automotive industry has been providing potential alternatives to address this current issue. One of those possible solutions is the start/stop (SS) system, which consists of an engine shutdown strategy that prevents idling operation. Vehicle idling results in a relevant fraction of fuel consumption and air pollutant emissions, especially in urban driving conditions. Therefore, this study aims to simulate a SS system in an internal combustion engine vehicle model in order to evaluate its improvements in fuel consumption and reduction of generated tailpipe gases. The vehicle simulation model is developed in Matlab/Simulink™ environment and the exhaust emissions are quantified by the ADVISOR™ fuel converter block. For a further analysis that takes into account different driving conditions, the vehicle will be analyzed under the FTP-75 driving cycle used in emission evaluation procedure and also under a real-world driving cycle.

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“…First, as the fuel economy during engine start is inherently deteriorated, the fuel economy should be re-evaluated for idle stop strategy. An "invalid idle stop," which means that the fuel saved by idle stop can not compensate the fuel economy deterioration by engine restart, should be avoided (Matsuura et al, 2004). Second, special methods should be adopted to guarantee quick engine starts so that good drivability can be attained (Kataoka et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Transient characteristics of emissions during engine start/stop operation employing a conventional gasoline engine for HEV application

Dong

2008

Int.J Automot. Technol.

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In this paper, we investigate the transient characteristics of combustion and emissions during engine start/stop operations in hybrid electric vehicle (HEV) applications. Hydrocarbon (HC) emissions during the initial 2 nd~9th cycles are found to be significantly greater when the engine is quickly started under the original engine calibration mode. Lower intake manifold absolute pressure (MAP) was also found to cause larger residual gas dilution and poor combustion, resulting in a higher HC concentration when the cranking speed was increased. The post-catalyst HC concentration was found in the way of initially decrease and then to increase again as the cranking speed was increased. A lowest concentration value was achieved at a cranking speed of 1000 r/min. Engine shut-down by fuel cut-off was shown to produce lower emissions than shut-down by ignition cut-off as one can avoid misfire of the last fuel injection cycle. The fuel deposited during the stop process seems to impact engine restart enrichment mostly during the initial 0.7 s for this engine, whose performance is dominated by the MAP transition characteristic and the time coefficient for fuel vaporization in this time period

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Fuel Consumption Improvement of Vehicles by Idling Stop

Cited by 32 publications

References 3 publications

Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy

Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy

Modelagem e simulação de um sistema start/stop para redução de consumo de combustível e emissões de gases poluentes

Transient characteristics of emissions during engine start/stop operation employing a conventional gasoline engine for HEV application

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