The Layout Optimization for Axial Stiffness of a Flexplate Disk with Weight and Inertial Moment Constraints

2013 ◽  
Vol 655-657 ◽  
pp. 630-635 ◽  
Author(s):  
Da Ke Zhang ◽  
Chong Wang ◽  
Yi Chao Yang ◽  
Han He
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Layout Optimization ◽  
Axial Stiffness ◽  
Manufacturing Cost ◽  
Mechanical Component ◽  
Inertial Moment

A flexplate is a mechanical component that couples the crankshaft to the torque converter of a car with automatic transmission. A higher axial stiffness is one of significant requirements for it in order to ensure its performance. In this paper an optimum design of the flexplate disk is described that maximizes the axial stiffness of the flexplate disk with weight and inertial moment constraints. The strategy for optimizing the layout of the disk is to perform topology optimization first then position optimization. The relation is presented which shows the variation of axial stiffness with respect to changes of the number, shape and position of the holes on the flexplate disk. The research shows that the shape of the hole punched on the disk does not affect the axial stiffness greatly. Thus, the manufacturing cost should be considered first in the optimum design of the flexplate disk

Dynamic Temperature Testing and Modeling for an Automatic Transmission Clutch

2001 ◽  
Author(s):  
Thomas DeMurry ◽  
Yanying Wang
Keyword(s):  
Experimental Data ◽  
Real Time ◽  
Automatic Transmission ◽  
Thermal Characteristics ◽  
Torque Converter ◽  
Telemetry System ◽  
Temperature Model ◽  
And Control ◽  
Good Agreement ◽  
Dynamometer Test

Abstract The primary objectives of this study are (1) to validate the hardware design and control methodologies for preserving the thermo-mechanical integrity of a launch clutch emulating a torque converter and (2) to develop a simple, control oriented clutch-temperature model that may act as a virtual thermocouple in the processor of an automobile for real-time clutch-temperature predictions. In a dynamometer test cell, a Ford CD4E transaxle is instrumented with a thermocouple-based telemetry system to investigate clutch thermal characteristics during engagements, neutral idle, single and repeated launching, torsional isolation, and hill holding. A nonlinear, SIMULINK™-based model for estimating temperature is developed. The results from the simulations are in good agreement with the experimental data.

Lightweight Materials and Structures

MRS Bulletin ◽  
2001 ◽  
Vol 26 (10) ◽  
pp. 790-797 ◽  
Author(s):  
A.G. Evans
Keyword(s):  
Topology Optimization ◽  
Minimum Weight ◽  
Fuel Efficiency ◽  
Manufacturing Cost ◽  
Materials Selection ◽  
Lightweight Materials ◽  
New Developments ◽  
A Value ◽  
Technical Factors

Many technologies require load-sustaining components that are as lightweight and compact as possible. This requirement is especially true in the transportation area, where lightness equates with fuel efficiency and range. Concept implementation is dictated by the tradeoff between performance and manufacturing cost, which is manifest in a value factor. The attainment of the minimum weight has a long history. Four technical factors are involved: materials selection, utilization of shape, topology optimization, and multifunctionality. The new developments to be addressed in this article arise in topology optimization. Multifunctionality has been elaborated elsewhere.

A Mechanical Torque Converter, and Its Use as an Automobile Transmission

1976 ◽  
Vol 190 (1) ◽  
pp. 447-456 ◽  
Author(s):  
Frederic Williams ◽  
D. Tipping
Keyword(s):  
Fuel Consumption ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Manual Transmission ◽  
Output Shaft ◽  
Basic Design ◽  
Prime Mover ◽  
Experimental Performance ◽  
Performance Curves ◽  
And Performance

SYNOPSIS A torque converter is described in which the prime mover is directly coupled to a pulsator unit which produces an alternating torque. Sprag-type clutches are used to rectify this torque and to transmit it to the converter output shaft. A developed version of this basic design for use as an automobile automatic transmission is described and theoretical and experimental performance curves are given which show that an automobile drive is possible which approaches a manual transmission for fuel consumption and performance.

Optimum Design of Return and Cushion Springs for Automatic Transmission Clutches

2001 ◽  
Author(s):  
Arnd Hagerodt ◽  
Ferit Küçükay ◽  
Dong Hoon Park ◽  
Alexander Heim ◽  
Andreas Rinsdorf
Keyword(s):  
Optimum Design ◽  
Automatic Transmission

Dynamic Model of Automatic Transmission System of Tracked Vehicle

2013 ◽  
Vol 397-400 ◽  
pp. 369-373 ◽  
Author(s):  
Jun Yi ◽  
Shui Sheng Chen ◽  
Da Zhang You
Keyword(s):  
Regression Analysis ◽  
Dynamic Model ◽  
Intelligent Control ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Transmission System ◽  
Simulation System ◽  
Tracked Vehicle ◽  
Planetary Transmission ◽  
Test Result

The dynamic characteristic of automatic transmission system of tracked vehicle was thorough analyzed. The primary characteristic of torque converter was proposed by means of regression analysis of test result. The dynamic model of three-freedom planetary transmission was constituted using drive principles of planetary transmission. Thus the foundation of intelligent control and simulation system of automatic transmission of tracked vehicle was established.

Numerical and Experimental Verification of Optimum Design Obtained from Topology Optimization

2003 ◽  
Author(s):  
Hui Wang ◽  
Zheng-Dong Ma ◽  
Noboru Kikuchi ◽  
Christophe Pierre ◽  
Basavaraju Raju
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Experimental Verification

Control of A Friction Launch Automatic Transmission Using a Range Clutch

2006 ◽  
Author(s):  
Chunhao J. Lee ◽  
Kumar Hebbale ◽  
Shushan Bai ◽  
Farzad Samie
Keyword(s):  
Robust Control ◽  
Fuel Economy ◽  
Control Strategy ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Control Algorithms ◽  
Automatic Transmissions ◽  
Fuel Economy Improvement ◽  
Vehicle Test ◽  
Overall Ratio

Friction Launch transmissions use a wet multi-plate clutch to replace the torque converter in an automatic transmission. The main benefit of this technology is fuel economy improvement as a result of eliminating the losses in the torque converter. By using one of the range clutches inside the transmission instead of an input clutch in place of the converter, the benefits of this integrated friction launch technology, such as reduction in mass, packaging, and cost, can be enhanced. The availability of new automatic transmissions with higher number of speeds and wider overall ratio spreads makes this technology more viable than ever before. This project focuses on control issues with the friction launch clutch which include developing robust control algorithms for launch and creep, and providing damping to the driveline, when required, and ensuring acceptable vehicle drivability. This paper describes in detail the development of vehicle launch control algorithms. Vehicle test data is presented to show that the control strategy developed in this project significantly reduces the gap between the drivability of a starting clutch vehicle and a torque converter equipped vehicle.

Robust and Simplified Design of Slip Control System for Torque Converter Lock-Up Clutch

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
R. Hibino ◽  
M. Osawa ◽  
K. Kono ◽  
K. Yoshizawa
Keyword(s):  
Control System ◽  
Design Process ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Operating Conditions ◽  
Slip Control ◽  
Design Time ◽  
Actual Design ◽  
High Level ◽  
Relationship Of

A torque converter lock-up clutch slip control system, which is designed to improve fuel economy, must be able to precisely regulate slip speed. Also the system must have a high level of robustness for coping with changes in the operating conditions and any deterioration in the automatic transmission fluid and the clutch. Moreover, to reduce the design time, the design process must be as simple as possible. In this paper, we first propose a loop shaping that aims to optimize complementary sensitivity function of the control system, while satisfying the abovementioned requirements of performance and robustness. Next, a method for simplifying the design process is proposed, that is, a model and a controller are expressed by interpolation. A controller set, which has a relationship of duality to the interpolation parameters of the model, is created in advance so that the construction of a new control system can be realized by identifying the characteristic parameters only. From application to the actual design process for a vehicle, we verified that the design time was reduced to less than 1∕3 of that required for the conventional method. This new method has already been adopted for the design and fitting of new products.

Sign in / Sign up

Export Citation Format

Share Document