Torque Split Mechanism: Description
WARNING: This page is about a different car, the 2012 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
- Ball ramp lever operates in the direction of main shaft axis according to rotation of actuator shaft and presses piston. Pressure is applied to each clutch and torque is transmitted.
- Shift fork operates in the direction of main shaft axis according to rotation of actuator shaft and performs engagement and disengagement to Hi-Lo sleeve and lock sleeve of main shaft. Mode is switched between 4H<==>4L.
AUTO MODE
- The optimum torque distribution is electronically performed for front and rear wheels according to road conditions.
- Stable start without wheel spin is possible on slippery road conditions, such as on a snowy road.
- When road condition does not require 4WD driving, the status becomes close to rear wheel drive, which results in better fuel efficiency and provides FR-like steering characteristics.
- The vehicle cornering status is judged according to information from each sensor, and the optimum torque is distributed to front wheels for preventing tight-corner braking symptom.
NOTE:
When there is a difference of revolution speed between the front and rear wheel the shift occasionally changes to direct 4-wheel driving conditions automatically. This is not a malfunction.
4H MODE
- Torque distribution for front and rear wheels is fixed and stable start is achieved while driving on an rough, sandy or snowy road.
4L MODE
- Large traction force is obtained due to low gear. High running ability and escaping ability are achieved.
- Switching from 4H mode to 4L mode is not possible when the vehicle is running or A/T shift selector is shifted to any position other than neutral.