Research On The CVT Of Engineering Vechile And Its Accelerograph Control System

When engineering vehicle work,the fierce change of the load and frequentshifts of the gears,cause the engine speed undulating in a big way and fuel oilconsumption increasing.Automatically shifting gears according to the load changesituation, guaranting the engine works always in the highly effective area,achievingthe goal of the save of the fuel oil. But automatically shifts gears system is unableto satisfy the match of the load and the engine output under the instantaneousoperating mode,only through the adjustment velocity ratio, and achieves thehighly effective energy conservation. and the best energy conservation effect. Thisarticle in view of third step cvt mashine which independently designed compared tothe triadic hydraulic pressure machinery stepless gear box,conducts thecharacteristic research to the hydraulic pressure machinery less transmission,provides the beneficial reference take the time as the hydraulic pressure machineryless transmission generality design rule research. The engineering vehicles cvt control system is a mechanical-electricalintegration system. mechanical-electrical integration technology,impelling theengineering vehicles automatic control system research and development,alreadyformed by the independent control which always becomes has faced the powerdrive system integration integrated control, by is controlling generally tointellectualized and netnized the control development tendency. As vehiclesintegration of machinery system important constituent,The accelerator electroniccontrol regarding reduces pilot's labor intensity, enhanced the vehicles theefficiency and the work margin of safety plays to the very important role,Thereforealso is a this article research emphasis point. This article has mainly completed the following several partial research 1,a summary The paper has completly analyzed the cvt tecnology's present situations anddevelopment of both domestic and foreign,And has pointed out the cvt's principleof work, the technical characteristic, the application and the future developmenttendency. 2,The research of engineering machnical on hydraulic and machnicaltransmission system The main topics on hydraulic cvt is hydraulic and machnical streamingtransmission. Its purpose is to increase the power of transmission and improvetransmission efficiency. In this paper ,the two characteristics of hydraulic andmachnical streaming transmission are analysed and wo disscuss the cvt theory andall kinds of transmission in detail.3,A new type of hydraulic mechanical transmission programme which wasgeometric proportion and syllogism.In view of the hydraulic and mechanical transmission of the currentengineering vehicles on gear shift has discontinuity problems, the paper designed anew type of hydraulic and mechanical transmission called geometric proportionand syllogism programme, and take an analysis of its rate of identity, power andeconomic on it. Through the analysis on the characteristics which compared thehydraulic and machenical composite transmission with the hydrodynamic machientransmission . dynamics characteristies and economical efficiency have greatlyimproved on hydraulic and machenical composite transmission, And vehiclesaccord to load change, drivetrain system automatically adjust variables pumpsinclination towards the matching load with engine . Its power characteristics curvesleek, easy to drive a vehicle improvements,which will be of practical significance.The power to improve the utilization of machines, for the purpose of reducingenergy losses from the close control of angles,which was discussed in this paper.4,A accelerograph control systems based on engineering vehicles' cvtEngineering vehicles' working atmosphert is so difficult that adapting to theextent of the situation are of utmost importance. Design of the cvt device is basedon improvement of the complex into a vehicle for manipulation, reducing thedependence on vehicles. Thus alleviating the fatigue, people from the liberation ofheavy manual labour in a more overflowing energy in a more important work. Onthe other hand, the design of electronic controls can achieve energy savings andimprove the economic machinery of the works and to improve the efficiency ofcars. This article is based on the engineering design of vehicles Wujibiansu devicesinstalled control systems. And the establishment of an electronic throttle controlsystem analysis of mathematical models down its transmission function. PIDalgorithms through several comparative analysis, since the choice of algorithmsJidian, energy conservation and efficient system to accomplish the purpose. And aperformance by matlab simulation, the new PID controller to draw more thantraditional PID control methods.5,Software and hardware design of ECUThe use of more advanced TMS320LF2407 as the current chip, and itsexternal circuit design. Ruitai production companies to take full advantage of thedevelopment board and TMS320LF2407EVM ICETEK-5100 simulationsimulation devices for the erection of hardware equipment provided a goodsimulation tests prepared to complete a good test. And integrated developmentenvironment based on CCS, a mixed programming completed PID algorithmdevelopment and stepper motor control procedures.