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A Study of the Driveability Improvement on the Electronic Throttle Control M/T Vehicle at Tip-in/out  

Park, Kyoung-Seok (School of Mechanical Engineering, Kumoh National Institute of Technology)
Lee, Jong-Hwa (Division of Mechanical Engineering, Ajou University)
Park, Jin-Il (Division of Mechanical Engineering, Ajou University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.2, 2006 , pp. 151-157 More about this Journal
Abstract
The passenger car drivers want in general to feel good driveability, but they sometimes feel uncomfortable by shock and jerk phenomena when they push or release acceleration pedal with clutch on state. In this paper, the shock and jerk characteristics are studied on the vehicles controlled by the throttle-by-wire system. Experiments and simulations were carried out on two vehicles which show different control characteristics. The engine torque control characteristics was analyzed by measuring cylinder pressure. Various specification factors of the vehicles and the torque control logic of the engines were simulated through experimental data basis. The result shows the spring effect of the trans-axle in the drive-train is one of the most important factors of the shock-jerk phenomena and the engine torque control method is also responsible for the reducing the shock-jerk amplitude. In this paper a new control logic of the engine torque is suggested for the better driveablility on the tip-in/out event.
Keywords
Throttle-by-wire; Driveability; Tip-in/out; Shock-Jerk; Torque control;
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