Motor-vehicle door latch with power assist

Abstract

A motor-vehicle door latch has a bolt projecting from a support and movable by an actuator between an advanced and a retracted position, and a housing movable between an open, a partially closed, and a fully closed position. A latch fork can engage the door bolt to retain same and lock the door. The servoactuator can, when the bolt is engaged with the fork, move the housing between the partially and fully closed positions. A pawl pivots on the housing between a holding position retaining the fork in the latched position and a freeing position permitting the fork to move out of the latched position. A release lever on the housing displaces the pawl from the holding to the freeing position. A opening lever on the housing operatively engageable with the support is coupled to the pawl for moving it from its locked to its unlocked position on movement of the opening lever from a cocked to a rest position. The opening lever moves on displacement of the housing from the partially to the fully closed position from the rest to the cocked position and on displacement of the housing from the fully to the partially closed position from the cocked to the rest position so that on movement of the bolt from the advanced to the retracted position with the bolt engaged in the fork the opening lever is moved from the rest to the cocked position.