Center Differential and Transfer
1. Transfer
This transfer is a two-speed (Low- High) type. This transfer is a compact and lightweight. Its main feature is the adoption of the torque sensing type center differential with mechanical locking type. In this transfer, a planetary gear train is used in the reduction mechanism and a silent chain is used to reduce noise for the front drive. The method for switching the modes of this transfer involves the operation of a 4WD control switch to actuate the two shift motors. Thus, the transfer shift lever has been discontinued and the ease of operation has been improved.
Transfer shift actuator
The transfer shift actuator, which contains “H”-“L” shift motor limit switch, center differential lock shift motor, “H”-“L” shift motor limit switch, center differential lock shift motor limit switch and center differential lock detection switch, cannot be disassembled. (1/3)
2. Power transmission
(1) “H” position The splines at the rear of the transfer input shaft mesh with the internal gear teeth of the high and low clutch sleeve. Also, the high and low clutch sleeve is meshed to the differential case. Thus, the rotation of the input shaft is transmitted to the high and low clutch sleeve, the differential case.
(2) “L” position The external teeth of the high and low clutch sleeve are meshed with the planetary spline piece, and the planetary ring gear is fixed. Thus, the rotation of the input shaft is transmitted in a reduce from to the planetary sun gear, planetary pinion gear, planetary pinion gear shaft, planetary carrier, planetary spline piece, high and low clutch sleeve, high and low clutch hub, and differential case.
3. Center differential
(1) Construction Torque sensing type center differential with mechanical locking type consists of a differential case, coupling, ring gear, 8 pinion gears, sun gear, and carrier.
(2) Principle of operation 1. Normal driving (front wheel speed = rear wheel speed) The driving force that is input by the differential case is transmitted by front: 40, rear: 60. When a rotational difference exists between front wheel and rear wheel, the torque distribution of the driving force (torque) that is input by differential case changes instantly by the pinion gear and clutch plate operation before the torque is transmitted. 2. Front wheel skid driving (front wheel speed > rear wheel speed) The center differential distributes more torque to the rear wheels.
4. Rear wheel skid driving (front wheel speed = rear wheel speed)
The center differential distributes more torque to the rear wheels.
Center differential lock mechanism
When the center differential lock switch is ON, the center differential lock shift motor within the transfer shift actuator operates. This slides the center differential lock shift fork and locks the center differential.