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.

scholarly journals Quantitative Inference in a Mechanical Design “Compiler”

1989 ◽  
Author(s):  
A. C. Ward ◽  
W. P. Seering
Keyword(s):  
Design Process ◽  
Power Transmission ◽  
Mechanical Design ◽  
Operating Conditions ◽  
Optimal Selection ◽  
High Level Language ◽  
Hydraulic Power ◽  
Detailed Design ◽  
High Level ◽  
Selection Of

Abstract This paper introduces the theory underlying a computer program that takes as input a schematic of a mechanical or hydraulic power transmission system, plus specifications and a utility function, and returns catalog numbers from predefined catalogs for the optimal selection of components implementing the design. Unlike programs for designing single components or systems, this program provides the designer with a high level “language“ in which to compose new designs. It then performs much of the detailed design process. The process of “compilation”, or transformation from a high to a low level description, is based on a formalization of quantitative inferences about hierarchically organized sets of artifacts and operating conditions. This allows design compilation without the exhaustive enumeration of alternatives. The paper introduces the formalism, illustrating its use with examples. It then outlines some differences from previous work, and summarizes early tests and conclusions.

A Framework for the Application of Adaptronic Solution Principles

2013 ◽  
Author(s):  
David Inkermann ◽  
Carsten Stechert ◽  
Thomas Vietor
Keyword(s):  
Design Process ◽  
Operating Conditions ◽  
Design Knowledge ◽  
Design Phase ◽  
Conceptual Design Phase ◽  
Initial Procedure ◽  
High Level ◽  
Design Conflicts ◽  
Robotic Applications ◽  
Early Phases

There is an increasing need for products that are able to react to changing operating conditions and user demands to achieve a high level of performance. Adaptronic solutions allow for property adjustments without major effects on system weight and size when they are applied in early phases of the design process. Since a framework for the design of adaptronic solutions is not yet established, this paper introduces an initial procedure and principles to provide design knowledge. The paper first gives an overview on adaptronics and adaptability as well as principles and guidelines for designing adaptable products. Fifteen adaptronic solution principles are derived from adaptronic solutions to provide the information needed for the design of adaptable products. A framework is proposed to apply the introduced principles within the conceptual design phase to avoid design conflicts and undesired effects. Finally, the framework is used for the design of adaptive joints for robotic applications.

Torque Converter Clutch Slip Control System

1995 ◽  
Author(s):  
Katsumi Kono ◽  
Hiroshi Itoh ◽  
Shinya Nakamura ◽  
Kenichi Yoshizawa ◽  
Masataka Osawa
Keyword(s):  
Control System ◽  
Torque Converter ◽  
Slip Control

scholarly journals Experimental Investigation of Cavitation Signatures in an Automotive Torque Converter Using a Microwave Telemetry Technique

2003 ◽  
Vol 9 (6) ◽  
pp. 403-410 ◽  
Author(s):  
C. L. Anderson ◽  
L. Zeng ◽  
P. O. Sweger ◽  
A. Narain ◽  
J. R. Blough
Keyword(s):  
Experimental Investigation ◽  
Automatic Transmission ◽  
Pressure Fluctuations ◽  
Torque Converter ◽  
Differential Pressure ◽  
Operating Conditions ◽  
Pump Speed ◽  
Pressure Transducers ◽  
Charge Pressure ◽  
Transmission Fluid

A unique experimental investigation of cavitation signatures in an automotive torque converter under stall conditions is reported. A quantitative criterion is proposed for predicting early and advanced cavitation in terms of suitable nondimensional pump speeds. The dimensionless pump speed that marks early cavitation is obtained by relating this parameter to the appearance of charge-pressure–dependent pressure fluctuations in the differential pressure transducer readings. The differential pressure transducers were mounted at well-defined locations in the pump passage of a torque converter. The data were transmitted by a wireless telemetry system mounted on the pump housing. Data were received and processed by a ground-based data acquisition system. Automatic transmission fluid exhibited cavitation for charge pressures of 70–130 psi and pump speeds of 1000– 2250 rpm. Advanced cavitation was marked by operating conditions that exhibited a 2% or more torque degradation from the converter's noncavitating performance.For a given family of torque-converter designs and a given transmission fluid, the proposed nondimensional pumpspeed criteria are capable of marking early and advanced stages of cavitation for a range of torque-converter sizes and a range of charge pressures in the torque converter.

The Application of CBR in Stone Equipment Variant Design

2011 ◽  
Vol 230-232 ◽  
pp. 144-148
Author(s):  
Jing Kun Wang ◽  
Jian Jun Li ◽  
Jin Sheng Zhang ◽  
Xing Ai
Keyword(s):  
Design Process ◽  
Design Principle ◽  
Case Based Reasoning ◽  
Variant Design ◽  
Design Time ◽  
Resolution Model ◽  
Actual Design ◽  
Case Based

This paper studies the application of CBR (case-based reasoning) in stone equipments variant design. As the actual design process and CBR process have collateral corresponding relation, CBR accords with the actual design process of deviser. The basic resolution model of variant design is established, and the instance of products variant design is presented. With the application of variant design principle, the design intensity will be lightened, and the design time will be shortened. Therefore the variant design accommodates the requirement of products diversification and client orientation.

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