Transmission device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-2016138706-A1
Application number	US-201414900603-A
Country	US
Kind code	A1
Filing date	Jun 13, 2014
Priority date	Jun 22, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

A transmission device for a motor vehicle is disclosed. The transmission device includes at least one coupling unit, which for non-rotatable connection of two coupling elements, has a friction-locking unit and a form-locking unit connected in parallel to the friction-locking unit. The device further includes a first hydraulic and/or pneumatic actuator for actuation of the form-locking unit, a second hydraulic and/or pneumatic actuator for actuating the friction-locking unit, and a directional valve for controlling the first actuator provided for actuation of the form-locking unit. The directional valve has a control line connection which in at least one operational state is connected in pressure terms to the second actuator provided for actuation of the friction-locking unit.

First claim

1 .- 10 . (canceled)

11 . A transmission device for a motor vehicle, comprising:
a coupling unit, which for non-rotatable connection of two coupling elements has a friction-locking unit and a form-locking unit connected in parallel to the friction-locking unit; a first hydraulic and/or pneumatic actuator, wherein the form-locking unit is actuatable by the first hydraulic and/or pneumatic actuator; a second hydraulic and/or pneumatic actuator, wherein the friction-locking unit is actuatable by the second hydraulic and/or pneumatic actuator; and a directional valve; wherein the directional valve has a first control line connection which in at least one operational state is connected in pressure terms to the second hydraulic and/or pneumatic actuator; and wherein the directional valve has a second control line connection which in at least one operational state is connected in pressure terms to the first hydraulic and/or pneumatic actuator.

12 . The transmission device according to claim 11 , wherein the directional valve has a valve slide with two control surfaces which are associated respectively with one of the first and second control line connections and which are oriented in a same direction.

13 . The transmission device according to claim 12 , wherein the directional valve has a third control line connection, wherein the valve slide has a third control surface which is associated with the third control line connection, and wherein the third control surface is oriented in an opposite direction to the two control surfaces.

14 . The transmission device according to claim 13 , further comprising a solenoid valve and a third actuator for actuation of a second coupling unit which in at least one operational state is connected in pressure terms to the third control line connection.

15 . The transmission device according to claim 14 , wherein the directional valve has a spring wherein a spring force of the spring is oriented in a same direction as the third control surface which is associated with the third control line connection.

16 . The transmission device according to claim 15 , wherein the second coupling unit is closed in a fourth, a fifth, a sixth, a seventh, an eighth, and a ninth forward gear and wherein the coupling unit is closed in the eighth forward gear, the ninth forward gear, and a reverse gear.

17 . The transmission device according to claim 13 , further comprising a working pressure system which, in at least one state, is connected in pressure terms to the third control line connection.

18 . The transmission device according to claim 17 , wherein the directional valve has a spring wherein a spring force of the spring is oriented in an opposite direction as the third control surface which is associated with the third control line connection.

19 . The transmission device according to claim 11 , further comprising a third actuator for actuation of a second coupling unit.

Assignees

• Daimler Ag

Inventors

• Tonius Nils
• Brandenburg Markus
• Haerter Tobias
• Rossmeier Markus

Classifications

• F16H3/66 Primary

  composed of a number of gear trains without drive passing from one train to another · CPC title

• F16H61/0265 Primary

  for gearshift control, e.g. control functions for performing shifting or generation of shift signals · CPC title

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title

• F16D25/14

  Fluid pressure control · CPC title

• F16D23/06 Primary

  and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation · CPC title