The Optimizing Matching For Transmission System Based On Cruise

Engine and transmission matching quality level directly affect the dynamic performance and fuel economy of the whole vehicle. At present the vehicle performance, system matching work in OEMs and motor plants at home and abroad becomes more and more attention, more meticulous and specialized. Using the vehicle performance simulation of vehicle and matching design with a lot of road test model data, can greatly improve vehicle matching design prophase compliance, and effectively shorten product launch cycle. Based on the motorcycle as the research object, this paper consists of the study of vehicle performance, theory and simulation for centrifugal ball-type CVT .This paper mainly working contents as follows:①Before the study vehicle performance, first determine the dynamics of economic performance evaluation. During the simulation and experimental research, mainly in the power of a bus full of index cases, the maximum speed, acceleration gear row starting spot, direct file acceleration and maximum climbing degree; major evaluation of the economic indicators bus of full different circumstances stall speed constant driving fuel consumption per hundred kilometers, and driving cycle fuel consumption.②According to the physical structure, establishing the model and the correct signal connection in between each module. Motorcycle models include: engine module, mechanical friction clutch module, mechanical five-speed manual transmission gearbox module, main gear module, Lord wheel and machinery brakes module structure module and so on. And according to the need to set each module parameters, in a subsequent operations for vehicle lay the foundation.③We established shift points, which includes shift in the process of shifting and dynamic economy shift, the shift of power is to make as much as possible in the lower gear while driving, choose the highest speed in the low point. Shifting economics is to have a better economic performance, choose a higher minimum speed gear shift. And the Shift Schedule Shift Schedule and economic power were used in the calculation of performance and economic performance mode. For the simulation results, from the vehicle's power and economic performance analysis of two aspects, analysis and experimental simulation result is close, experimental verification of the correctness of the vehicle model. And on this basis, the main drive and the vehicle loaded with quality than the optimized variables and found out the gear ratio optimization and applications closer to the transmission ratio, vehicle quality is relatively little effect.④According to the metal belt type centrifugal ball control step-less transmission structure model and stress analysis, the simulation model was established, using the model to simulate the characteristics of continuously variable transmission ratio, and verify that the model is correct and feasible. And this model can be applied to all the centrifugal ball type CVT, convenient for CVT the design and structure of the improvement.⑤The modularized Cruise software is due to the concept design, in which software can to a separate parts design. For Simulink CVT ratio derived features, used in vehicle simulation. The vehicle model are experiments in other modules, only the data is simulated CVT, the last vehicle of the simulation results and experimental results agree, which indirectly shows the correctness of the simulation CVT. Software co-simulation with a more powerful, easier to change the parameters, you can save a lot of time and testing costs.