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首页> 外文期刊>International journal of sustainable transportation >Critical aggressive acceleration values and models for fuel consumption when starting and driving a passenger car running on LPG
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Critical aggressive acceleration values and models for fuel consumption when starting and driving a passenger car running on LPG

机译：启动和驾驶在LPG上行驶的乘用车时的临界激进加速值和油耗模型

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The models based on vehicle speed have been used to estimate fuel consumption and CO2 emissions. However, these models could not properly estimate the change in fuel consumption and CO2 emissions as the speed changes. As for the alternative method, people try to consider using acceleration instead of speed. Although acceleration has been seriously considered, determining critical aggressive acceleration value in relation to fuel consumption and CO2 emissions is difficult to find. In this study, evaluation models of fuel consumption were developed using instantaneous acceleration, and we defined the critical aggressive acceleration values for different states of the vehicle from the viewpoints of fuel consumption and emissions. We used a mid-sized Liquefied Petroleum Gas (LPG) passenger car and obtained instantaneous data from a digital tachograph installed in the car while it accelerates. We developed two fuel consumption models and found critical aggressive accelerations, respectively: a model of starting vehicle that measures range of speed required to overcome the inertia during acceleration from stop state, and the other model for the driving state. We used Classification and Regression Tree (CART) analysis to find the critical aggressive accelerations at which the increments of fuel consumption change abruptly. As a result, the critical aggressive accelerations causing abrupt change in the increments of fuel consumption were found to be 2.598 m/s(2) for the starting of vehicles and 1.4705m/s(2) when driving them. We also found that the increments of fuel consumption can be explained through quadratic and exponential functions with instantaneous acceleration.
机译：基于车速的模型已用于估计燃料消耗和二氧化碳排放量。但是，这些模型无法正确估计速度变化时的燃油消耗和二氧化碳排放量的变化。至于替代方法，人们试图考虑使用加速度而不是速度。尽管已经认真考虑了加速度，但是很难找到与燃油消耗和二氧化碳排放量相关的临界加速度值。在这项研究中，使用瞬时加速度开发了油耗评估模型，并且我们从油耗和排放的角度定义了车辆不同状态下的临界加速加速度值。我们使用了中型液化石油气（LPG）乘用车，并从安装在汽车中的数字行车记录仪获得了加速时的瞬时数据。我们开发了两种燃油消耗模型，并分别找到了关键的加速加速度：一种用于测量从停止状态加速时克服惯性所需的速度范围的起步车辆模型，另一种用于行驶状态模型。我们使用分类树和回归树（CART）分析来找到关键的激进加速度，在该加速度下，油耗的增量会突然变化。结果，发现导致燃料消耗增量突然变化的临界激进加速度对于车辆的启动为2.598 m / s（2），在驾驶车辆时为1.4705m / s（2）。我们还发现，燃油消耗的增加可以通过瞬时加速度的二次函数和指数函数来解释。

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