| The automobile dynamical and fuel economic characteristic are very important and basic. In before, we evaluated the results after the road testing, if the result was not good, we had to go back to modify the design, then it will cost a lot of time and money. But now with the development of the automobile technology and computer, besides the customer's request and the market competition,the simulation of the dynamical and fuel economic characteristic should be start at concept phrase,then we can save a lot of money and time,at same time we can understand is the result good previously.In the paper we introduced how to simulate the automobile dynamical and fuel economic characteristic use computer. The research scheme includes such items as:1,At first we discussed how to simulate the dynamical and fuel economic characteristic of a engine with mathematics; this is the basic and what kind of models we used will influence the results;2,And then we discussed how to simulate the car's performances use the functions that we have gotten before;3,How to evaluate the results and what should be taken care of. These are very important, because it is not important to calculate a result, how to distinguish which are the best from the results is more important.This request the designer has abundant experience;4,According to this theory I made a program. The programme should be concise and easy to be used.5,At the next step I calculated"the New Car"with this program and compare the result with VW. Then I know this program has some shortages and how to updata it.This program is very useful, the designer can finish the calculation quickly and get a accurate result if he use this program. Before,all these work were done by VW, and we paid a lot of money for these,because each car has several engines and gearboxs to be selected. We can calculate all the engines and gearboxs and select the best one.The mainly results of the paper:1,According to my experience, I introduced the theory and process of the automobile dynamical and fuel.2,Made a program and improve the designer efficiency to calculate the automobile dynamical and fuel economic characteristic. At the same time because we can do this work by ourselves that mean we can save a lot of money for our company.3,According to the experience of my work, I summarized that what should be paid attention to when we match the vehicle and the limited conditions.4,We understood some ways and process about the simulation of the automobile dynamical and fuel economic thought compared with foreign company.Based on the above research outputs,a useful tools was formulated and it provides practical support for product development by ourselt. I calculated the"new car"with this programme. I believe in future when the programme is completed it will privide more support for our product development. |
