碳平衡法燃油消耗量测试仪的开发

介绍了我国燃油消耗量测量方法标准以及常见的汽车燃油消耗量测量方法,阐述了碳平衡法的基本原理,在CVS(定容取样法)基础上提出开式排气稀释取样系统;针对当前车辆燃油消耗量测量操作不便的问题,根据碳平衡法燃油消耗量测量原理,建立了采用流量计的碳平衡法汽车燃油消耗量测量模型及测量系统;分析研究了燃油密度、氢碳比、排气成分以及整个系统的同步和负荷测试对测量结果的影响,在实车上进行试验验证,与油耗仪实测结果进行了对比。结果表明,该方法具有较高的精度及稳定性,为车辆燃油消耗量的不解体测量提供了理论依据及应用可能性。

Development of Vehicle Fuel Consumption Testing Device Based on Emission Gas Open Dilution and C-balance

The paper introduces the fuel consumption measuring standards and the typical measuring methods for fuel consumption of motor vehicle in China,it describes the basic principle of carbon balance method,and then advances the opening dilution sampling system base on constant volume system;Aiming at the problem of unconvenient measurement of vehicle fuel consumption and following the trend of disassemble test of vehicles,a measuring model of fuel consumption of a petrol engine was established and its test system was developed based on the carbon balance method in this paper.The effects of the density and hydrogen-carbon ratio of fuel,the content of exhaust vapour,the system synchronise and the load of tests were investigated and analyzed as well.The tests were carried out in different type of vehicles,and the calculation results of above-mentioned measurement are compared with the measured ones.The modeling and test results by the model and the test system indicate that they have a good accuracy and stability under different velocities and types of vehicles,as well as a high value of application.