Driving position selector with an emergency release for a parking position
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsRudolf Ehrmaier, Norbert Woeste, Josef Neuner
Life of this patent
Estimating the term…
Abstract
A driving position selector for selecting at least the driving steps of the automatic transmission, “D”, “N”, “R”, “P”, which are selected by the driver over a control device and engaged by electro-hydraulic setting elements is provided. It is possible to disengage a parking position by a release device in the automatic transmission housing. An operating device is connected by a Bowden cable with a release lever of the release device. The swiveling motion of the release lever is not transferred to the Bowden traction cord, since the release lever can move along a Bowden traction cord suspended in the release lever.
Claims6
A driving position selector for selecting operating positions of an automatic transmission of an automobile,
- said positions being engaged by electro-hydraulic setting elements activated by a transmission control device, a release device in the automatic transmission housing operable to disengage a transmission parking position,
- said release device being activatable by a manual operating device,
- said operating device being connected by a Bowden cable to a release lever of the release device, the release lever being mounted on a rotating member which is rotatable back and forth by the electro-hydraulic setting elements when the parking position is engaged and disengaged, and
- said rotating member being operable to swivel the release lever forward and backward,
- wherein the release lever is configured to move along the Bowden cable, which is suspended in the release lever, unless the operating device is activated whereby a thickening in the Bowden cable forms a positive locking between the Bowden cable and the release lever and disengages the parking position.
A release device for disengaging a parking position of an automatic transmission of an automobile, comprising:
- a rotatable release lever and pivoting member which can engage and disengage the parking position,
- a manual operating device connected to the release lever by a Bowden cable, wherein the Bowden cable is suspended in the release lever whereby the release lever can move along the Bowden cable without transferring motion to the Bowden cable, and
- a thickening located on the Bowden cable whereby the manual operating device moves the thickening into contact with the rotatable release lever and thereby rotates the release lever and the pivoting member and disengages the parking position in order to tow the automobile.
A release device for disengaging a parking position of an automatic transmission, comprising a rotatable release lever which can disengage the parking position and rotates to indicate engagement and disengagement of the parking position by a transmission control device,
- a manual operating device connected to the rotatable release lever by a Bowden cable suspended in the rotatable release lever,
- said Bowden cable having a thickening located to rotate the rotatable release lever and thereby disengage the parking position when the manual operating device is actuated, wherein the rotatable release lever does not transfer motion to the Bowden cable during normal shifting operation.
A method of making a parking position release device for an automatic transmission of an automobile, comprising the acts of;
- providing the automatic transmission comprising a transmission control device which activates electro-hydraulic setting elements for engaging driving positions and a release device with a release lever which is rotated back and forth by the electro-hydraulic setting elements when the parking position is engaged and disengaged,
- connecting the release lever to a manual operating device by a Bowden traction cord,
- whereby the release lever is configured so as not to transfer rotating motion to the Bowden traction cord since the release lever can move along the Bowden traction cord suspended in the release lever during normal shifting operation, and only activation of the manual operating device attains a positive motion transfer between a thickening of the Bowden traction cord and the release lever to disengage the parking position.
Dependencies are inferred from the claim text.