Simulation Of EMCVT And Hardware Design Of EMCVT's Elecgtronic Control System

The wide application of automobiles has caused global air pollution, climate warmingand sharp cutoff of petroleum resources. The major car companies have been committingto the development and application of new technology in automotive energy conservationand reduction of pollutant emissions. EMCVT (Electronic Mechanical CVT) applies thegovernor mechanism being composed of the motors, gears, springs, which is simplestructure, low or no energy consumption to realize continuously ratio variation and the bestmatch between automotive driveline and engine conditions. Comparing with traditionalmetal belt CVT, EMCVT abandons the hydraulic pressure mode system of pumps, valvesand hydrodynamic torque converter which are high energy consumption, high cost andhigh failure rate. So EMCVT further improves automobile's fuel economy, powerperformance and comfortable, and reduces the transmission manufacturing costs andfailure rate of transmission. It is a vital studying significance and practical value.Combining with theoretical analysis and experimental verification is applied todiscuss and study EMVCT modeling, simulation and hardware design of electronic controlsystem. Firstly, based on the in-depth analysis of the EMCVT's structure and principle, theauthor made clear that the EMCVT control is the control of the ratio control motor and theclutch control motor. Secondly, based on the detailed analysis of the front-drive CVTvehicle model (BD-CONCVT) in the electric vehicle simulation software of ADVISOR,the author redeveloped the software of ADVISOR. A compared simulation betweenrear-drive EMCVT SUV and its prototype was performed. The simulation process wentwell proving that the modeling and simulation method mentioned in the paper isreasonable and effective, and simulation results showed that the fuel consumption ofYZ-EMCVT reduces by 13.9% compared with its prototype further validating the researchsignificance and practical value of EMCVT. Thirdly, according to the requirements ofvehicle under different driving conditions, the author established the ratio control strategiesand a detailed simulation model of EMCVT vehicle. With the method of modifying thePID control parameters, the simulation was performed under the vehicle operating conditions of start and acceleration. The reasonable results verified the correctness of themodel and effectiveness of PID control algorithm. Finally, the author finished the designand making of EMCVT control system hardware.