MATLAB-based Design and Performance Calculation of Transmission Ratio of a Passenger Vehicle

Abstract

In order to solve the problem of matching the transmission ratio of the automobile power system, this paper selects a specific passenger car as the target model, and gives the expected maximum speed as the design target, and then compares the vehicle dynamics with the Newton Leibniz numerical calculation method The car carries out engine selection, transmission ratio design and calculation of performance parameters. The main calculation content includes engine external characteristic curve, driving force-driving resistance balance diagram, acceleration time curve, and the highest grade constant speed 100 km fuel consumption curve and different The C curve at the main reduction ratio, and finally the dynamic analysis of the matching of the car's transmission and the final reduction ratio, and the optimal transmission ratio scheme that meets the design goals is obtained.