The Analysis Of Effectiveness Loss Parameter Superiority Of Automobile Clutch And Gearbox

In the process of actual usage, two problems about a certain type bf cargo truck appear. The first one is the burnt clutch and the second is the fracture of gear teeth of the sixth gear.This paper trice to find the cause of effective ness loss and to analyze it theoretically by adopting the ways of quantitative analysis and quantitative analysis by using the way of fault tree to carry out the qualitative analysis, it draws the logic charts by various elements that cause the loss of effectiveness and to make a faucet tree to find out the loss programs, then make a final analysis of the smallest element of the fault tree. The first problem is due to the over friction by exceeding permitted limits; The second problem is due to the gear feather's low inteusity,This paper adopts the method of changing the trans Mission ratio of the first gear and the width of the sixth gear of second shaft so as to solve the problems.In order to solve the two problems, this paper adopts the method of reduced Gradient to design precisely the parameter of friction and transmission ratio of gearbox and the gear teethes of the sixth gear of the second shaft. This method is of high reliability and efficiency. It's regarded the one of the best designing method nowadays.To choose the best parameter of frication piece and make sure that the cloth's mechanical function is the aim of friction piece's parameter priority. The one of the loss of effectiveness is the friction piece's bum of the clutch, There fore, in the designing of priority, the clutch's with of friction power is smaller than the permitted value in the reduction of the starting the truck, and it also increases the permitted condition of decreasing cloth's friction hot volume.In the designing of priority for the transmission ratio, the usage of gear's attest on transmission ration should be considered; the average value is set as the evolution aim of the loss of driving power and the useful effectiveness. A simplified fuel-consumed economically model is used to simulate the fuel consumption while the automobile is in motion.Through militia programs, the final plan is to change the transmission ratio of gearbox, the parameter of friction piece as well as the gear width of the sixth gear of the second shaft. Finally, the parts of transmission system-clutch, gearbox, driving shaft, driving bridge are checked and the problems are solved.