Automatic Transmission Shift Control for Canceling Inertia Torque

2018 ◽  
Author(s):  
Yijing Zhang ◽  
Hiral Haria ◽  
Rohit Hippalgaonkar ◽  
Gregory Pietron ◽  
Yuji Fujii
Keyword(s):  
Automatic Transmission ◽  
Shift Control

scholarly journals Smooth Gear Shift Control System of Automatic Transmission Using Estimated Output Shaft Torque.

1995 ◽  
Vol 61 (591) ◽  
pp. 4334-4338
Author(s):  
Toshimichi Minowa ◽  
Hiroshi Kimura ◽  
Junichi Ishii ◽  
Masahiko Ibamoto
Keyword(s):  
Control System ◽  
Automatic Transmission ◽  
Output Shaft ◽  
Gear Shift ◽  
Shift Control ◽  
Shaft Torque

Electronic Transmission Controls

2000 ◽  
Keyword(s):  
Internal Combustion Engines ◽  
Automatic Transmission ◽  
Transmission Efficiency ◽  
General Motors ◽  
Navigation Systems ◽  
Automotive Electronics ◽  
Passenger Cars ◽  
Mechatronic Systems ◽  
Shift Control ◽  
Continuously Variable Transmissions

The evolution of the automotive transmission has changed rapidly in the last decade, partly due to the advantages of highly sophisticated electronic controls. This evolution has resulted in modern automatic transmissions that offer more control, stability, and convenience to the driver. Electronic Transmission Controls contains 68 technical papers from SAE and other international organizations written since 1995 on this rapidly growing area of automotive electronics. This book breaks down the topic into two sections. The section on Stepped Transmissions covers recent developments in regular and 4-wheel drive transmissions from major auto manufacturers including DaimlerChrysler, General Motors, Toyota, Honda, and Ford. Technology covered in this section includes: smooth shift control; automatic transmission efficiency; mechatronic systems; fuel saving technologies; shift control using information from vehicle navigation systems; and fuzzy logic control. The section on Continuously Variable Transmissions presents papers that demonstrate that CVTs offer better efficiency than conventional transmissions. Technologies covered in this section include: powertrain control; fuel consumption improvement; development of a 2-way clutch system; internal combustion engines with CVTs in passenger cars; control and shift strategies; and CVT application to hybrid powertrains. The book concludes with a chapter on the future of electronic transmissions in automobiles.

Research of Gear Shift Control Technology for a New 8-Step Speed Automatic Transmission

2013 ◽  
Vol 455 ◽  
pp. 376-382 ◽  
Author(s):  
Yang Liu ◽  
Shu Han Wang ◽  
Xi Lu ◽  
Ting Bin Song ◽  
Wen Shu Wei ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Automatic Transmission ◽  
Estimation Method ◽  
Engineering Application ◽  
Shift Control ◽  
Torque Estimation ◽  
Set Up ◽  
Control Principle ◽  
Shift Clutch ◽  
The Ideal

For the development research for a new 8 step speed automatic transmission, a simplified dynamic model for this transmission was established. Aimed at four basic shift types, the ideal characteristics of shift clutch and engine control were set up. By using torque estimation method, PI slip control algorithm and engine coordinated control principle, the control model were developed for two main shift phases which are torque phase and inertia phase. The test on the rig and vehicle verified the accuracy and feasibility of this shift control strategy. The development model and algorithm have a high value for engineering application.

Analysis of Improving Automatic Transmission Upshift Performance by Using Off-Going Clutch During Inertia Phase

2021 ◽  
Author(s):  
Ivan Cvok ◽  
Vanja Ranogajec ◽  
Josko Deur ◽  
Yijing Zhang ◽  
Vladimir Ivanovic ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Trajectory Optimization ◽  
Piecewise Linear ◽  
Phase 1 ◽  
Automatic Transmission ◽  
Single Step ◽  
Dissipated Energy ◽  
Engine Torque ◽  
Shift Control ◽  
Clutch Control

Abstract The paper presents a detailed numerical and algebraic analysis of potential for improving the step ratio automatic transmission (AT) upshift performance by means of modulating the off-going clutch during the inertia phase. The numerical analysis is based on Pareto optimal frontiers obtained by using the previously developed methods for AT shift control trajectory optimization and piecewise-linear control profile parameter optimization, where the control objectives include minimization of shift time, vehicle RMS jerk, and clutch dissipated energy. The analysis concerns the following control scenarios related to inertia phase: 1) oncoming clutch control only, 2) combined action of oncoming and off-going clutch; 3) oncoming clutch control extended with engine torque reduction control, and 4) combining all three control actions. The numerical results relate to an advanced 10-speed AT and various single-step and double-step upshifts, with emphasis on 1-3 shift. The numerical analysis results are proven algebraically based on a simplified AT model represented in bond graph form. The presented analysis shows that the off-going clutch can reduce either shift time or RMS jerk index by introducing power recirculation via the two clutches, which is in turn paid for by certain increase of AT energy loss.

Partitioning System Architecture to Optimize Reliability While Limiting the Impact of Cost, Weight and Schedule

2000 ◽  
Author(s):  
James M. Wasiloff ◽  
Robert J. Regan
Keyword(s):  
System Architecture ◽  
System Reliability ◽  
Automatic Transmission ◽  
Control Design ◽  
Advanced Technology ◽  
Generic Model ◽  
Cost Weight ◽  
Shift Control ◽  
Physical Volume ◽  
The Impact

Abstract A method using discrete design optimization to maximize product reliability and customer satisfaction through uniquely partitioning system architecture is developed and presented in this paper. Using integer programming, constraints such as cost, weight and physical volume are incorporated into a mathematical model to improve system reliability through the introduction of system architectural redundancies. An advanced automatic transmission electronic shift control system is examined as a potential application for the aforementioned methodology. A significant improvement in system reliability is achieved through the application of this optimization tool in the shift control design problem. A generic model is proposed for architectural optimization of emerging advanced technology systems with requisite critical reliability requirements.

Design and Optimization of Clutch Hydraulic Shift Control System in Automatic Transmissions with Failure Protection Function

2015 ◽  
Vol 743 ◽  
pp. 11-16
Author(s):  
S.H. Tang ◽  
Yan Fang Liu ◽  
Xiao Han
Keyword(s):  
Control System ◽  
Design Method ◽  
Automatic Transmission ◽  
Hydraulic Control ◽  
Design And Optimization ◽  
Significant Control ◽  
Shift Control ◽  
Traditional Design ◽  
Automatic Transmissions ◽  
Hydraulic Control System

As a significant control component of vehicles, automatic transmissions should have failure protection function. The failure protection function partly is determined by the hydraulic control system. However traditional design could not cover all of failures, and there is no general design method. A design method is proposed for designing the shift control oil circuit of the hydraulic control system with the failure protection function. . The design method is applied to optimize the hydraulic control system of a six-speed automatic transmission. The function of the optimized hydraulic control system is confirmed by the dynamic simulation. The results show that the design method can simplify the hydraulic control system without losing any original functions. The proposed design method is proved to be suitable for all kinds of hydraulic control systems of automatic transmissions.

Torque Phase Shift Control Based on Clutch Torque Estimation

2013 ◽  
Author(s):  
Diana Yanakiev ◽  
Yuji Fujii ◽  
Eric Tseng ◽  
Gregory M. Pietron ◽  
Joseph Kucharski ◽  
...  
Keyword(s):  
Closed Loop ◽  
Automatic Transmission ◽  
Time Estimation ◽  
Transfer Phase ◽  
Shift Method ◽  
Shift Control ◽  
Input And Output ◽  
Torque Estimation ◽  
Real Time Estimation ◽  
Clutch Torque

An automatic transmission shift method is presented, in which the torque transfer phase is controlled in closed loop. This is made possible by real-time estimation of the torque transmitted by the off-going and on-coming clutches participating in the shift. Each clutch torque is determined based on measured or estimated input and output shaft torques and accelerations. To illustrate an application of the method, traditional friction elements are used to emulate one-way-clutch function during a power-on upshift.

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