IS300/IS300 SportCross – NEW FEATURES 26 FLYWHEEL 1. General Flywheel Damper The manual transmission model uses a super-long travel type flywheel damper. It contains a decoup- ling mechanism, consisting of springs, which di- vides the flywheel into the engine and transmis- sion sections. By decreasing the fluctuation of torque transmitted from the engine to the trans- mission, these springs contribute in reducing dri- vetrain vibration and noise. Engine Side Transmission Side 213IS13 2. Construction The flywheel damper is fastened to the crankshaft via bolts, in the same way as the conventional flywheels.
The flywheel damper consists of the primary flywheel which receives direct torque, arc springs and inner springs positioned in-line by way of a flange, and side plates riveted onto the secondary flywheel. The clutch disc and cover are attached to the secondary flywheel. Primary Flywheel Flange Arc Spring A Flange Secondary Flywheel A Side Plate Primary Flywheel Inner Spring Side Plate Arc Spring Secondary Flywheel A – A Cross Section 213IS14