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DI02-43 CHANGED BY EFFECTIVE DATE AFFECTED VIN ENGINE HOUSING DI ENG SM - 2004.4 Y220_02112 <Example of DMF operation> Y220_02113 System Characteristics Function • Filters irregularities of engine: The secondary flywheel operates almost evenly so does not cause gear noises • The mass of the primary flywheel is less than conventional flywheel so the engine irregularity • Transmission protection function: Reduces the load to powertrain (transmission) by blocking the irregularity Characteristics of DMF • Reduced vibration noise from the powertrain by blocking the torsional vibrations • Enhanced vehicle silence and riding comforts: reduced engine torque changes • Reduced shifting shocks • Smooth acceleration and deceleration Structure Function and characteristics • When the output changes from the engine is high during power stroke ( ): The damper absorbs the shocks to reduce the changes to transmission. • When the output changes from the engine is low during compression stroke ( ): The damper increases the torque changes to clutch. Advantages of DMF • Improved torque response by using 3-stage type spring: Strengthens the torque response in all ranges (low, • Stable revolution of the primary and secondary wheel by using planetary gear: Works as auxiliary damper • Less heat generation due to no direct friction against spring surface: Plastic material is covered on the spring • Increased durability by using plastic bushing (extends the lifetime of grease) <Torque change curve of engine and drive shaft> Angular acceleration amplitude [1/s 2 ] Speed [rpm] Conventional system Speed [rpm] DMFW Transmission Engine Transmission Engine |