Chapter 9 Operational Performance Section 2 Fuel Economy Fuel consumption of the unit distance of travel can be determined by the following equation: Q. G.100 Va kg/100km Assuming the dead weight is Ga(kg),then the fuel consumption of the unit of transport workload is: g-兽 G-p+31+.G业 kg/t.km 21.15gdt If the fuel consumption is calculated by volume L,the fuel consumption of the unit distance of travel is: 9x:L/100km If the fuel consumption of a unit of transport workload is also calculated by volume L,that is, g:L/tkm 械电子工程学度 《汽车拖拉机学》 Northwest A&F University
《汽车拖拉机学》 Northwest A&F University Chapter 9 Operational Performance Fuel consumption of the unit distance of travel can be determined by the following equation: = 100 a t s V G Q kg／100km Assuming the dead weight is Ga(kg),then the fuel consumption of the unit of transport workload is: a s g G Q Q 10 = + + = dt dV g C A V G G G g D a a c a e 3.6 10 21.15 2 3 kg/t·km If the fuel consumption is calculated by volume L, the fuel consumption of the unit distance of travel is: Qs : L/100km If the fuel consumption of a unit of transport workload is also calculated by volume L, that is, Qg : L/t·km Section 2 Fuel Economy
Chapter 9 Operational Performance Section 2 Fuel Economy 2.Fuel Economy of Automobile To a certain load,the fuel consumption formula can be simplified when a given car travels at a certain gear and with steady speed on the road whose resistance coefficient is d: 2,=f'a) The curve expressed by the above equation is called the fuel economy curve,which can be used to analysis and evaluate fuel economy of automobiles. 机械电子工程学膜 《汽车拖拉机学》 Northwest A&F University
《汽车拖拉机学》 Northwest A&F University Chapter 9 Operational Performance 2. Fuel Economy of Automobile To a certain load, the fuel consumption formula can be simplified when a given car travels at a certain gear and with steady speed on the road whose resistance coefficient is ф: ( ) s Va Q = f The curve expressed by the above equation is called the fuel economy curve, which can be used to analysis and evaluate fuel economy of automobiles. Section 2 Fuel Economy
Chapter9 Operational Performance Section 2 Fuel Economy 30 CA10B JN150 20 NJ1 NJ220 BJ212 10 SH760 20 40 60 80 V.,km/h Figure 9-10 Curve of fuel consumption of 100km of automobiles made in China with steady speed 械电子工程学 《汽车拖拉机学》 Northwest A&F University
《汽车拖拉机学》 Northwest A&F University Chapter 9 Operational Performance Figure 9-10 Curve of fuel consumption of 100km of automobiles made in China with steady speed Section 2 Fuel Economy
Chapter 9 Operational Performance Section 2 Fuel Economy 3.Test Methods of Automobile Fuel Economy There are Determination a variety of methods to determine automobile fuel economy.According to degree of control of operational factor,test methods can be divided into the following categories:not controlled road test,controlled road test,road cycling test(including steady fuel consumption,acceleration and braking fuel consumption,etc.)and cycling test on the chassis dynamometer (roler bench). Operational factors affected the fuel economy include: (1)Road conditions,such as the grade of road and the type of road; (2)Traffic conditions,such as traffic density and composition; (3)Driving habits,such as speed,acceleration and deceleration intensity and the use of the accelerator pedal; (4)Climatic conditions,such as temperature,wind,rain,fog,snow and so on. 机械对电子工程学 《汽车拖拉机学》 Northwest A&F University
《汽车拖拉机学》 Northwest A&F University Chapter 9 Operational Performance 3. Test Methods of Automobile Fuel Economy There are Determination a variety of methods to determine automobile fuel economy. According to degree of control of operational factor, test methods can be divided into the following categories: not controlled road test, controlled road test, road cycling test (including steady fuel consumption, acceleration and braking fuel consumption, etc.) and cycling test on the chassis dynamometer (roler bench). Operational factors affected the fuel economy include: (1) Road conditions, such as the grade of road and the type of road; (2) Traffic conditions, such as traffic density and composition; (3) Driving habits, such as speed, acceleration and deceleration intensity and the use of the accelerator pedal; (4) Climatic conditions, such as temperature, wind, rain, fog, snow and so on. Section 2 Fuel Economy
Chapter9 Operational Performance Section 2 Fuel Economy 4.The Major Factors Affecting Fuel Economy The major factors affecting fuel economy can be summarized into two aspects.One is the use aspect and the other is the structures of automobiles aspect. 4.1 Use Aspect (1)Speed (2)Gears selection (3)Application of trailers (4)Correct adjustment and maintenance (5)Operating conditions (6)Rational utilization of sliding 械电子工程学 《汽车拖拉机学》 Northwest A&F University
《汽车拖拉机学》 Northwest A&F University Chapter 9 Operational Performance 4. The Major Factors Affecting Fuel Economy The major factors affecting fuel economy can be summarized into two aspects. One is the use aspect and the other is the structures of automobiles aspect. 4.1 Use Aspect (1) Speed (2) Gears selection (3) Application of trailers (4) Correct adjustment and maintenance (5) Operating conditions (6) Rational utilization of sliding Section 2 Fuel Economy