Study Of Hydraulic Compound Drive System In Automobile Controlled By Electricity

A1ong with the quick deve1oPffient of auto industry, the oi1 is in short supp1yand the pol1ution of the environment becomes the most serious prob1em that shou1dbe solved inunediate1y.AInerican PNGV (the cooperation contract of AInerican gOvernment and autoindustry circ1e ) p1an to deve1op three times fue1 efficiency of automobile atpresent, within 10 years. There are three major aspects of its study' first,raising the efficiency of fue1 changed into mechanical energy; second,decreascing the vehic1e weight in order to reduce the requirement for the forceof engine: thir(1, drawing back and uti1izing the 1oss energy of brake and s1owsdown.This thesis belongs to the research of the third aspect, the conpound drivesystem is used 1;o regenerate the 1oss energy. The low oil consumption and lowb1eeder of vehic:le are achieved by way of the orggnic combination of transmission.hydrau1ic pressure and automatic control system, and the compotald drive systemworks hamonious1y with engine to raise the motive capability effectively. Itis the new avai1ab1e technology of automobi1e saving energy and environmenta1protection.The hydI.au1ic pressure system uses the pmp/motor and the container of airsac type as the energy transfomtion and the storage part, so it has compactstructure and the rapid reaction.The force interface is rea1ized thI-ough the inspected window in the vergeof gearbox, the gear in the midd1e ax1e, Whose teeth a1ways eng8ge with the wheelin first ax1e can be used. this techno1ogy avai1able and re1iab1e.The AT89C52 serves as the center of the automatic control system's hardwaIe,it doesn' t extend RAM and Rod. Microprocessor's I/0 is the seria1 interface chip,making the system simplified and reliability increased. The state and seat ofthrOttle. clutch and brake, the rotates speed of engine, the direction of motiveforce etc are the paraneters.The softwe of autonatic contro1 system useS the strucrura1 progranII7lJz# ffi g1angnge-- "{:51" to design, and the program is divided into main routinemodu1e and each subroutine. The duty of intel1igent autonatic contro1 system isto coordinate the energy regenerating system with the auto's primary power system,it is one of the important technology of cmpound drive system.The implementation of the systam should not increase the driver's operationitems, not change driver's origina1 operation habit and the vehicle's previousmoving 1ap at the saJne time cooperate with the engine reasonab1y. Accordingto the real circumstances the automatic contro1 system conands the change andintensity of energy drawing back and re1easing at the right monent. The procedureof contro1 takes the cIrivers intention as topic, the real paraJneters as basis,in order to raise motive force, reduce oi1 consmption. pollution and wear.This research is expected to reduce the rate of fu1e consumption more thanl5%, that wi1l bring extremely high economic and social benefit.Postgraduate f Liu HonedingMajor: Agricultural electrization and automatizationTutor f Prof. diyang Bin--lin...