400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-0790 Web: www.sae.org SAE TECHNICAL PAPER SERIES 2007-01-1310 Development of Smooth Up-Shift Control Technology for Automatic Transmissions with Integrated Control of Engine and Automatic Transmission Takaaki Tokura, Tomohiro Asami, Yoshio Hasegawa, Toshio Sugimura and Katsumi Kono Toyota Motor Corp. Kenji Aoki Toyota Technical Development Corp. Reprinted From: Tr ansmissions & Drivelines (SP-2134) 2007 World Congress Detroit, Michigan April 16-19, 2007 Downloaded from SAE International by Big Ten Academic Alliance, Wednesday, August 01, 2018By mandate of the Engin eering Meetings Board, th is paper has been approved for SAE publication upon completion of a peer review process by a minimum of three (3) industry experts under the supervision of the session organizer. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,without the prior written permission of SAE. For permission and licensing requests contact: SAE Permissions 400 Commonwealth DriveWarrendale, PA 15096-0001-USAEmail: [email protected]: 724-776-3036Tel: 724-772-4028 For multiple print copies contact: SAE Customer ServiceTel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-776-0790Email: Customer [email protected] ISSN 0148-7191Copyright © 2007 SAE InternationalPositions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE.The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the pap er if it is publishe d in SAE Transactions. Persons wishing to submit papers to be considered for presentation or publication by SAE should send themanuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USADownloaded from SAE International by Big Ten Academic Alliance, Wednesday, August 01, 2018Copyright © 2007 SAE International ABSTRACT The New Up-shift Control Technology has been developed for Automatic Transmissions, which uses integrated control of Engine and Automatic Transmissions. The control technology has improved shift shock and achieved shock less shifts. Additionally, the new Lexus LS460 is equipped with shift controltechnology, which contributes to the overall appeal of the vehicle. This paper describes the design method of the control sequence, which is based on the analysis of shift transition, result of applications to real cars, and its effect. 1. INTRODUCTION One of the main issues concerning the Automatic Transmission, besides improvement in gas mileage and engine performance, is to control shifts with minimum impact on driving performance (shift shock) as much as possible. On the other hand, recent developments in fields such as electronic control technology have led to the dramatic improvement of actuator controllability. Under such circumstances, Toyota developed a shift control technology to enable smooth driving performance from the beginning of the torque phase through the inertia phase, allowing shock less gear shifting. Also, we have managed to contribute greatly to enhancing product appeal by packing our control technology onto the new model "LS460." Throughout this paper, we will perform the analysis of shift transition during power-on up-shifting, and also "visualize" it. Next, we will describe the control sequence of engine torque and the clutch fastening capability of the Automatic Transmission shift control in order to achieve the desired driving performance from the beginning of the torque phase through the inertia phase, based on the analysis result. In the last section, we will report the result of applying the control sequence to a real car, and describe its effect. 2. AP