Mitsubishi Outlander ELECTRONIC CONTROL COUPLING

ELECTRONIC CONTROL COUPLING


FEATURES


The electronic control coupling realises the highly reliable 4WD system with lighter weight and simpler construction.

CONSTRUCTION



M227000070004900ENG
The electronic control coupling is comprised of the front housing, main clutch, main cam, ball, pilot cam, armature, pilot clutch, rear housing, magnetic coil, and shaft.

  • The front housing is joined to the propeller shaft and rotates along with the shaft.
  • The main clutch and pilot clutch are assembled to the front housing on the outer side and to the shaft on the inner side (The pilot clutch is installed via the pilot cam).
  • The shaft is engaged via serrations with the drive pinion of the rear differential.

OPERATION


COUPLING STOPS (2WD: MAGNETIC COIL DE-ENERGISED.)




The drive force from the transfer is transmitted to the front housing connected to the propeller shaft. The drive force is also transferred to the pilot clutch and the outer side of the main clutch assembled to the front housing. Because the pilot clutch and the main clutch are not engaged with the magnetic coil de-energised, the drive force is not transferred to the shaft and the drive pinion of the rear differential.

Coupling operates (4WD: Magnetic coil energised.)






  • The drive force from the transfer is transmitted to the front housing connected to the propeller shaft. The drive force is also transferred to the pilot clutch and the outer side of the main clutch assembled to the front housing. When the magnetic coil is energised, the magnetic field is generated among the rear housing, pilot clutch, and armature. The magnetic field induces the pilot clutch and armature to engage the pilot clutch. When the pilot clutch is engaged, the drive force is transferred to the pilot cam. When there is a difference in wheel angle between the front and rear wheels (i.e. rotation speed of the propeller shaft is different from that of the drive pinion), the rotation speed of the pilot cam applied with the drive force and that of the main cam not applied with the drive force become different. The ball slides along the curved space between the pilot cam and main cam by the rotational speed difference and pushes the pilot cam and main cam. Then, the main clutch is pushed toward the main cam to engage. When the main clutch is engaged, the drive force is transferred to the rear wheels via the shaft and the drive pinion of the rear differential.
  • By controlling the current applied to the magnetic coil, the amount of the drive force transferred to the rear wheels can be controlled within the range of 0 to 100%.