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| Fuel consumption reduction effect of pre-acceleration before gliding of a vehicle with free-wheeling |
| WenjingCao1,TaketoshiKawabe2,TsuyoshiYuno2,XiaoliangHuang3 |
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| (1 Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo, Japan;2 Graduate School and Faculty of Information Science and Electrical Engineering, Kyushy University, Fukuoka, Japan;3 Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden) |
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| 摘要: |
| Advanced fuel economy strategies are expected to reduce the fuel consumption of vehicles. An internal combustion engine
(ICE) driving vehicle equipped with free-wheeling turns off the fuel injection and decouples the engine from the drivetrain
when the driving force is not required. This paper proposes a method to reduce the fuel consumption of a vehicle equipped
with free-wheeling. First, an optimization problem is formulated to minimize the fuel consumption of a vehicle with freewheeling
when the traveling distance, the initial and final speed are specified and the vehicle needs to glide before arriving
at the end point for fuel economy. The speed profile of the vehicle, engine operating point, and engine on/off timing are
obtained as the results of the optimization. The analytical and numerical analyses results demonstrate the effectiveness and
the fuel-saving mechanism of the obtained speed profile. The main finding of the analyses is that rather than starting a gliding
stage immediately after an acceleration or a constant speed stage, adding a pre-acceleration stage before the gliding stage is
more fuel-economic under some conditions independent of the complexity of the vehicle model. The obtained speed profile
including a pre-acceleration stage is applied to a driving scenario including traffic congestions. The results demonstrate the
effectiveness of the pre-acceleration stage in reducing fuel consumption for a vehicle equipped with free-wheeling. |
| 关键词: Powertrain · Free-wheeling · Speed profile · Operational mode of engine · Fuel economy · Nonlinear optimization |
| DOI：https://doi.org/10.1007/s11768-022-00087-x |
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| 基金项目: |
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| Fuel consumption reduction effect of pre-acceleration before gliding of a vehicle with free-wheeling |
| Wenjing Cao1,Taketoshi Kawabe2,Tsuyoshi Yuno2,Xiaoliang Huang3 |
| (1 Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo, Japan;2 Graduate School and Faculty of Information Science and Electrical Engineering, Kyushy University, Fukuoka, Japan;3 Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden) |
| Abstract: |
| Advanced fuel economy strategies are expected to reduce the fuel consumption of vehicles. An internal combustion engine
(ICE) driving vehicle equipped with free-wheeling turns off the fuel injection and decouples the engine from the drivetrain
when the driving force is not required. This paper proposes a method to reduce the fuel consumption of a vehicle equipped
with free-wheeling. First, an optimization problem is formulated to minimize the fuel consumption of a vehicle with freewheeling
when the traveling distance, the initial and final speed are specified and the vehicle needs to glide before arriving
at the end point for fuel economy. The speed profile of the vehicle, engine operating point, and engine on/off timing are
obtained as the results of the optimization. The analytical and numerical analyses results demonstrate the effectiveness and
the fuel-saving mechanism of the obtained speed profile. The main finding of the analyses is that rather than starting a gliding
stage immediately after an acceleration or a constant speed stage, adding a pre-acceleration stage before the gliding stage is
more fuel-economic under some conditions independent of the complexity of the vehicle model. The obtained speed profile
including a pre-acceleration stage is applied to a driving scenario including traffic congestions. The results demonstrate the
effectiveness of the pre-acceleration stage in reducing fuel consumption for a vehicle equipped with free-wheeling. |
| Key words: Powertrain · Free-wheeling · Speed profile · Operational mode of engine · Fuel economy · Nonlinear optimization |
