A modern trend in four-wheel drive motor vehicles is to equip the transfer case with an electronically-controlled transfer clutch in place of the mode clutch. The transfer clutch is operable for automatically directing drive torque to the secondary wheels, without any input or action on the part of the vehicle operator, when traction is lost at the primary wheels for establishing an on-demand four-wheel drive mode. Typically, the transfer clutch includes a multiplate clutch assembly that is installed between the primary and secondary output shafts of the transfer case and which is actuated by a power-operated actuator in response to control signals sent from a controller. The control signals are typically based on current operating characteristics of the vehicle (i.e., vehicle speed, interaxle speed difference, acceleration, steering angle, etc.) as detected by various sensors. Thus, such “on-demand” transfer cases can utilize adaptive control schemes for automatically controlling torque distribution during all types of driving and road conditions.
The use of multi plates is almost universal because there not as much of room is available in bikes to design the single plate clutch. So as a final point, designers uniformly share out the torque and power transmission between numbers of plate instead of single plate. Designers also foretell the life of clutch at the time of designing. Life of the clutch solely depends on frequency and handling of its exercise. Let us have brief outlook about the multi plate clutch assembly. Multi plate clutch assembly consists following components: