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Effect of Slip-Controlled Torque Converter Damper Clutch in 5-Speed Automatic Transmission on Slip Rate and Fuel Economy  

Lee, Gee-Soo (Korea Automotive Technology Institute)
Kim, Deok-Jung (Korea Automotive Technology Institute)
Kim, Hyun-Chul (Korea Automotive Technology Institute)
Na, Byung-Chul (Korea Automotive Technology Institute)
Heo, Hyung-Seok (Korea Automotive Technology Institute)
Lee, Ho-Gil (Korea Automotive Technology Institute)
Jang, Jae-Duk (Korea Powertrain Co. Ltd.)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.3, 2009 , pp. 74-80 More about this Journal
Abstract
The objective of this paper was to investigate the slip rate and the slip frequency number of damper clutch of torque converter in 2.4L passenger vehicle with 5-speed A/T and analyze the effect of slip control and control strategy on driving characteristics and the fuel economy. The newly developed torque converter with the more durable wet friction material and the slip-controlled damper clutch system, the DCC system, was installed, which was easily compatible and amendable of the lock-up clutch of the base system. The vehicle has been tested on the fuel economy modes such as FTP-75, HWFET and NEDC (ECE15+EUDC) driving cycle at chassis dynamometer. The DCC mode (II), of which the control strategy had both the lock-up and the slip-controlled clutch, and the DCC mode (I) with full slip-controlled clutch were compared with the base system with only the lock-up clutch. As the research result, comparison to base system, the fuel consumption of the vehicle with the DCC control (II) was effectively improved by 6.6% and 7.7% on FTP-75 and NEDC mode.
Keywords
Torque converter; Slip-controlled damper clutch; Lock-up clutch; Slip rate; Slip frequency number; Engine load ratio; Fuel economy mode;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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