FUZZY SYSTEM FOR CLUTCH ENGAGEMENT AND VIBRATION CONTROL IN PARALLEL HYBRID ELECTRIC VEHICLE

Hybrid electric vehicles (HEV) are popularizing due to the world's commitment to reduce the CO 2 and fossil fuel. Most of the current power transmissions are using the torque converters, and the transmission efficiency of torque converters is limited at the maximum of 96% due to high slipping ratio. This paper presents the design and the application of fuzzy logic controller for a dry friction clutch in parallel HEV. This new system can provide higher transmission efficiency up to more than 99% with fast and smooth jerk engagement. The controller can also regulate the clutch pressure to reduce noise and vibration in critical conditions and in high speeds. Experiments show that the noise and vibration can be eliminated up to 70% less than the use of conventional manual clutch.