The Vehicle Fuel Consumption Studies Based On Actual Road Working Condition

Energy conservation and emission reduction in the area of transportation is one o f the three key areas of our country.The transportation industry consumes more than 1/3 of the total oil consumption.Oil imports are expected to exceed 70% in 2020.Vehi cle fuel consumption is affected by its own characteristics,road traffic conditions,nat ural environment and driving levels and habits.So far,most of the research on fuel co nsumption is closely related to the vehicle characteristics,at the same time,the corres ponding oil saving technology has been used in the field of automobile design,manufa cture and application,however the research on other factors is relatively less.In this art icle,the change law of fuel consumption in actual driving condition is studied,which is based on the vehicle driving characteristics,road morphological characteristics and sp ecific power.The fuel consumption,road characteristics and driving characteristic state parameters are collected by the vehicle exhaust analyzer,gyroscope and VBOX speed measurement system.Based on the data of fuel consumption and running condition of the actual road driving conditions,the whole test route and the driving status of typical sections,the road shape characteristics and hundred kilometers fuel consumption are calculated.In order to analyze the causes of automobile fuel in the typical section between the different consumption,road route will be divided into different sections according to the test line,analyzing the reasons for the difference in fuel consumption between the typical sections of the same road type from the aspects of traffic congestion and road slope gradient.Based on the descriptive statistics method,road conditions,driving state characteristics and the percentage of time spent on road form combined driving state and average fuel consumption are analyzed.And the distribution model of locomotive specific power is calculated,paving the way for the construction of automobile fuel consumption model.According to the statistical percentage of the vehicle driving conditions and the corresponding average fuel consumption,find out the percentage of time high or higher average fuel consumption of the vehicle driving conditions,using the regression analysis method,mainly for accelerated uphill condition,accelerating downhill conditions,deceleration condition and steady-state conditions based on the speed,acceleration,and road grade building fuel consumption model.from the perspectives of the engine load rate and driving resistance analyze the change laws of fuel consumption.based on the turning radius of the car turning condition building fuel consumption model,analyzes the relations between the turning radius and the fuel consumption,The variation law of the fuel consumption is analyzed from the perspective of lateral inertial force and running resistance.Based on the regression analysis method,the significance test and regression diagnosis of the fuel consumption model were carried out to verify the effectiveness of the model.Through the statistics of the common car conditions,and the slope and speed are taken as control variables,the related analysis of specific power and fuel consumption is completed,then fuel consumption model based on vehicle specific power,analyzing the change of oil consumption from the angle of driving resistance,and test the validity of the model by the measure of significance test and regression diagnosis.