Development of a Slip Speed Control System for a Lockup Clutch (Part III)

Yutaka Kaneko; Kazutaka Adachi; Fumiyo Iino; Mitsuo Hirata

doi:10.4271/2009-01-0955

2009-04-20

Development of a Slip Speed Control System for a Lockup Clutch (Part III) 2009-01-0955

It is difficult for a conventional robust control algorithm to assure the performance of a slip speed control system, because the plant (lockup system) includes the nonlinear characteristics of the hydraulic system and large changes in the parameters of the slip model at low vehicle speed. The purpose of this study is to reduce the fuel consumption and improve the drivability of vehicles at takeoff by using a slip speed control system.

Providing a large feedback gain is effective in reducing the influence of nonlinearity. However, since the operating parameters of the lockup clutch change depending on the driving conditions, that is not possible. A feedback compensator with a gain-scheduled H_∞ control method was used in this study to solve these problems. The effectiveness of the slip speed control system was demonstrated in driving tests. Using this control system, the slip speed can be controlled with high accuracy, thereby reducing unnecessary revving of the engine. The system is expected to contribute to improved fuel economy.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Development of a Slip Speed Control System for a Lockup Clutch (Part III) 2009-01-0955

SAE MOBILUS