Zf Friedrichshafen Ag

Feintool International Holding Ag

Julia Klein

Tobias Miller

Matthias List

Florian Weinl

Armin Gierling

Ulrich Schlatter

Thomas Schwegler

Bernd Austermann

Armin Haugg

Dirk Leutheuser

Martin Meyer

Franz Brugger

Michael Jud

Marco Soldati

Sebastian Deeg

Arthur Strehlau

Gilbert Fuerer

Gilbert FÜRER

Parking detent pawls are known which are suitable for securely holding a vehicle in a parked state. The aim of the invention is to provide a detent pawl for a parking lock which is characterized by a high degree of operational reliability. For this purpose, a method is proposed for producing a detent pawl with a latching section for engaging into a locking toothing, a support section for rotatably supporting the detent pawl about a rotational axis, and a locking section for resting against a locking bolt which can be moved along the detent pawl, having the following steps: providing a detent pawl blank; providing a shaping tool with a shaping contour, said shaping contour having a load section and a guide section; and shaping the detent pawl blank in a shaping direction by means of the shaping tool, wherein a depression for receiving the locking bolt is produced on the locking section, the load section defines a load region of the depression for supporting the locking bolt in a locking position, and the guide section defines a guide region of the depression for guiding the locking bolt during an actuation movement.

Method for producing a detent pawl

An emergency release of a parking lock of a vehicle transmission arranged in a transmission housingincludes an actuating element of an actuator for actuating the parking lock is drivable so as to be linearly movable between an interlock position and a release position. The emergency release leveris pivotable away from a normal position past an emergency release position into an installation position and, in a second end region, has two guide projections, which are parallel to each other and extend radially toward the pivot pin, and between which a securing projection, which is fixedly connected to the transmission housing, projects when the emergency release leveris in the normal position and in the emergency release position. In the installation position of the emergency release lever, the securing projectionis located outside the area between the two guide projectionson the emergency release lever

Emergency release of a parking gear

A parking lock includes a locking pawl () and an interlocking element () arranged on a connecting bar () to a selector lever (). The end of the connecting bar () facing away from the interlocking element () is articulatedly connected to the selector lever (). A hydraulically actuatable actuator () includes two pistons () provided for disengaging the parking lock. During normal operation, a detent device (), which is actuatable by an electromagnet (), locks the first piston () in a piston position corresponding to an engaged condition (P_ein) or a disengaged condition (P_aus). Without requiring activating the electromagnet () to release the detent device (), the parking lock, during normal operation, is manually disengagable with an emergency disengagement device () acting upon the second piston () and is manually engagable with an emergency engagement device () acting upon the detent device ().

Parking lock for an automatic transmission in a motor vehicle

A parking lock includes a locking pawl () and an interlocking element () arranged on a connecting bar () to a selector lever (). During engagement of the parking lock, the selector lever () is rotated by a spring (). A hydraulically actuatable actuator () including two pistons (). A first piston () is pressurized in order to disengage the parking lock and axially displace the second piston () against a spring (). Axial movement of the second piston () rotates the selector lever () and vice versa. A detent device () of the actuator (), is actuatable by an electromagnet (). An emergency release device () is operatively connectable with the selector lever () so that the second piston () is axially displaceable by the selector lever () without displacing the first piston ().

Park lock for an automatic transmission in a motor vehicle

A parking lock includes a locking pawl () and an interlocking element (). The locking pawl () is pivotably mounted on a pawl pin () and engageable with a parking interlock gear (). The interlocking element () is arranged on a connecting bar () to a selector disk (), spring-loaded with a spring element (), and clampable between the locking pawl () and a guiding plate (). An end of the connecting bar () facing away from the interlocking element () is articulatedly connected to the selector disk (). An engaging piece () of the selector disk () is operatively connected to a parking lock actuator (). The connecting bar () is arranged below the locking pawl () such that a motion plane of the connecting bar () is parallel to a motion plane of the locking pawl () and perpendicular to the pawl pin ().

A parking lock for a transmission of a motor vehicle having an interlocking element of a connecting rod that is biased against a parking lock disengagement direction to bring and keep a ratchet tooth of a locking pawl in engagement with a tooth space of a parking interlock gear during an engagement of the parking lock. The connecting rod is provided a spring force acting in a parking lock engagement direction from an inserting spring and a compressive force acting in the parking lock disengagement direction from a hydraulically actuatable actuator having first piston pressurizable to disengage the parking lock. A detent device actuatable by an electromagnet mechanically fixes the first piston in either a latched or unlatched piston position associated with an engaged or disengaged position of the parking lock, respectively. A system determines a current engagement position of the detent device by assessing an inductance at the electromagnet.

Parking interlock in a vehicular transmission

Growing community of inventors

Friedrichshafen, Germany

Julia Klein