Schaeffler Technologies Ag & Co .kg

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Trevor McConnell

Patrick Lindemann

Jeff Hemphill

Philip George

Mavinkal Jayaram

A hydraulic valve including an inlet port for receiving a pressurized hydraulic fluid and an outlet port for expelling the hydraulic fluid. The valve also includes a displaceable spool for blocking and unblocking a flow path between the inlet and outlet ports, and a latching mechanism for displacing the spool in response to a pressure surge for the hydraulic fluid. The valve includes a first elastic element and a second elastic element, where the first elastic element urges the spool into a position blocking the flow path and the second elastic element urges the latching mechanism to displace the spool into a position out of the flow path. In an unlatched position of the latching mechanism, force from the second elastic element is transferred to the spool, and in a latched position of the latching mechanism, the spool is isolated from the second elastic element.

Latching check valve

An actuating device for a motor vehicle transmission having multiple transmission steps, having a threaded spindle which is mounted so it is rotationally movable and axially fixed and a spindle nut which is positioned on this threaded spindle and may be driven thereby, and also having a first component, which is positioned so it is axially fixed and rotatable to select gears of the motor vehicle transmission, which may be coupled and/or is coupled via a rotational carrier unit to the spindle nut, so that the first component may be driven to rotate by the threaded spindle via the spindle nut to select gears, a braking unit being provided to reduce and/or avoid axial position changes of the spindle nut caused by mass inertia as a result a braking procedures of the threaded spindle from a movement rotationally driving the first component; as well as a motor vehicle transmission unit, a motor vehicle drivetrain, and a method for reducing or avoiding control errors caused by mass inertia in the control of gear changing actions in a motor vehicle transmission.

Actuating device for a motor vehicle transmission

A single motor transmission shifting mechanism with exactly one electric motor for generating drive motions for selecting, and for generating drive motions for shifting gears of a motor vehicle transmission device, and with a threaded spindle for switching from a mode, in which selection motions can be effectuated, into a mode, in which shifting motions can be effectuated, and with a shifting shaft, which can be moved in axial direction for selecting, and which can be rotated around its longitudinal axis for shifting, wherein all components, transferring the drive load for shifting from the electric motor to the shifting shaft during shifting operation, maintain their axial position relative to the longitudinal axis of the threaded spindle during this shifting operation.

Single motor transmission shifting mechanism for a motor vehicle transmission

The invention relates to an actuating apparatus that can be used, for example, as an actuating apparatus for a motor vehicle transmission, the select function and the shift function being guaranteed by this actuating apparatus and it being possible to effect this using exactly one electric motor, and it being possible, starting from an original gear, to alternatively engage at least three different target gears without it being necessary in between to shift into an intermediate gear.

Growing community of inventors

Rittman, OH, United States of America

Trevor McConnell