Infinitely Variable Transmission (IVT) of John Deere 7000 TEN Series Tractors

2002 ◽  
Author(s):  
Sanjay I. Mistry ◽  
Gregory E. Sparks
Keyword(s):  
Transmission System ◽  
Electric Signal ◽  
Mechanical Transmission ◽  
Power Train ◽  
Performance Improvements ◽  
Reverse Mode ◽  
Variable Transmission ◽  
Infinitely Variable Transmission ◽  
Hydrostatic System ◽  
And Control

The John Deere 7000 TEN series tractors represent a significant change in the transmission system compared to previous John Deere tractor models in this category. John Deere 7710 and 7810 series tractors are the first of the 7000 TEN series tractors offering an infinitely variable transmission (IVT). These tractors provide infinite vehicle speeds in the forward mode from 50 meters/hr to 40 km/hr or an optional 50 km/hr. Reverse mode provides infinite vehicle speeds from 50 meters/hr to 17 km/hr. The IVT provides performance improvements in several areas for unmatched operator convenience and control. The new IVT uses an electric signal to control the electro-hydraulic hydrostatic system with mechanical power train. The IVT represents a hydro-mechanical transmission system using electronics, hydraulics and mechanical systems’ integration to achieve the required performance. This paper describes the IVT system configuration, components, operation, characteristics and some of the engineering considerations dealt with in the development process. The overall IVT system truly represents a “drive-by-wire” mechatronic design.

Plug-In Hybrid Power Train Engineering, Modeling, and Simulation

2013 ◽  
pp. 357-405
Keyword(s):  
Strong Dependence ◽  
Electricity Consumption ◽  
Mechanical Transmission ◽  
Power Train ◽  
Hybrid Power ◽  
Maximal Speed ◽  
Variable Transmission ◽  
Driving Range ◽  
Planetary Transmission ◽  
And Function

Chapter 10 presents the principles of the plug-in hybrid power train (PHEV) operation. The power trains of the battery-powered vehicle (BEV – pure electric) are close to the plug in hybrid drives. For this reason, the pure electric mode of operation of the plug in hybrid power train is very important. The vehicle’s range of driving autonomy must be extended. It means the design process has to be focused on energy economy, emphasizing electricity consumption. Simultaneously, the increasing of the battery’s capacity causes its mass and volume also to increase. Generally, it is not recommended. After many tests, one can observe the strong dependence between the proper multiple gear speed, the proper mechanical transmission adjustment, and the vehicle’s driving range, which in the case of the plug-in hybrid power train means long distance of a drive using the majority the battery’s energy. The mechanical ratio’s proper adjustment and its influence on the vehicle’s driving range autonomy is discussed in the chapter. Three types of the automatic mechanical transmission are depicted: the toothed gear (ball), the belt’s continuously variable transmission, and the planetary transmission system called the “Compact Hybrid Planetary Transmission Drive,” equipped additionally with tooth gear reducers, connected or disconnected by the specially constructed electromagnetic clutches. The number of mechanical ratios—gear speeds—depends on the vehicle’s size, mass, and function, which in the majority of cases means the maximal speed value.

The Virtual Simulation of Electric-Drive Mechanical Transmission

2014 ◽  
Vol 494-495 ◽  
pp. 234-237
Author(s):  
Wen Jie Shan ◽  
Sen Wu ◽  
Cheng Cai Zhang
Keyword(s):  
Electric Drive ◽  
Fuel Economy ◽  
Transmission System ◽  
Virtual Manufacturing ◽  
Virtual Simulation ◽  
Theoretical Research ◽  
Simulation Program ◽  
Mechanical Transmission ◽  
Power Train ◽  
Written Simulation

This paper studies the electric-drive mechanical transmission-EMT which integrates motor and mechanical transmission system. The system follows the principle of power-train integration, the paper uses the CATIA software for virtual manufacturing and assembling, through the written simulation program, using Matlab software transmission to design module simulation studying of the institution, to verify that the three grades EMT system is better in efficiency and fuel economy performance, to provide theoretical research guidance for the product designing.

scholarly journals Design and Control Method of Power-Cycling Variable Transmission System

2021 ◽  
Vol 1939 (1) ◽  
pp. 012091
Author(s):  
Dongye Sun ◽  
Hou Wenfeng ◽  
Shi Junren ◽  
Kan Yingzhe
Keyword(s):  
Control Method ◽  
Transmission System ◽  
Power Cycling ◽  
Variable Transmission ◽  
And Control

Non Linear Dynamic and Control of New Concept Orbital Pulley Infinitely Variable Transmission

2013 ◽  
Author(s):  
Orlando Palma ◽  
Carlos Cruz
Keyword(s):  
Separation Distance ◽  
Open Loop ◽  
Transmission Model ◽  
Variable Control ◽  
Wide Range ◽  
Continuously Variable Transmissions ◽  
Efficiency Performance ◽  
Variable Transmission ◽  
Infinitely Variable Transmission ◽  
And Control

The continuously variable transmissions (CVT) have been extensively studied, however, few studies of transmissions have been made that can reach the neutral and reverse rotational speeds through the separation distance of a half sided central pulley as a single variable control. This paper proposes a new clutchless transmission model, which operates through orbital pulleys to change velocity ratios for forward and reverse through neutral such that an infinitely variable transmission (OP-IVT) is obtained. The concept is described and explained, and the dynamic model of the system is proposed and shown in open loop. The system is also controlled via a numerical simulation program with PID control showing the dynamic closed loop behaviour of the generated model in trajectory tracking and disturbance rejection, showing the control as the capability to meet a wide range of speeds without losing the known efficiency performance of current continuously variable transmissions.

scholarly journals Method and Test Bench for Hydro-Mechanical Continuously Variable Transmission Based on Multi-Level Test and Verification

Machines ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 358
Author(s):  
Hanzheng Dai ◽  
Lirong Wan ◽  
Qingliang Zeng ◽  
Zhenguo Lu ◽  
Zhiyuan Sun ◽  
...  
Keyword(s):  
Test Bench ◽  
Structural Characteristics ◽  
Continuously Variable Transmission ◽  
Transmission System ◽  
Functional Test ◽  
Mechanical Transmission ◽  
Verification Method ◽  
Variable Transmission ◽  
Multi Level ◽  
The Impact

According to the structural characteristics of Hydro-mechanical continuously variable transmission (HMCVT), a multi-functional test bench was developed, and the basic structure, working principle, and test functions of the test bench were introduced. The test bench has the following characteristics: To analyze the impact of mechanical transmission and hydraulic transmission on the HMCVT transmission system, the performance can be tested separately by using a test bench; the coupling characteristics of the hydraulic transmission and mechanical transmission can also be tested; it can also test and verify the performance of the HMCVT transmission system and the control system; the test bench has a simple structure, diverse functions, and convenient operation. Using the multi-functional test bench, this paper proposes a method of multi-level test and verification. Through this method, the simulation models are revised and improved many times, and the accuracy of the models is improved, which are consistent with the physical model, and eventually, the accuracy of the simulation result is improved. This method is used to test and verify the hydraulic transmission system, analyze the characteristics of the hydraulic transmission system, and verify the feasibility and practicability of the multi-level verification method.

The Transmission Performances of Traction Infinitely Variable Transmission Used in Electric Vehicle Power Train

2012 ◽  
Vol 271-272 ◽  
pp. 1239-1243
Author(s):  
Fen Zhu Ji ◽  
Hao Hua Du
Keyword(s):  
Basic Structure ◽  
Transmission Efficiency ◽  
Transmission Characteristics ◽  
Power Train ◽  
Pure Rolling ◽  
Adams Software ◽  
Calculation Results ◽  
Variable Transmission ◽  
Infinitely Variable Transmission ◽  
Working Principle

The traction infinitely variable transmission (TIVT) used in the power train of electric vehicles (EVS) was designed. Firstly, based on the analysis of basic structure and working principle, the mathematic models were established on the transmission ratio, slipping ratio, transferring torsion and transmission efficiency; Secondly, Transmission characteristics of the TIVT were analyzed and calculated using ADAMS software. The calculation results show that: the export torsion varies with sway angle of steer ring as the import torsion is fixed. The transmission efficiency of TIVT is large when the motion of driving parts is pure-rolling or the slipping ratio is less. The efficiency could be reached more than 99% by rational designing. Theoretically, the driving distance of EVS matched with TIVT could be increased.

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