Transmission device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9939028-B2
Application number	US-201414900603-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Jun 22, 2013
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

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

The invention claimed is:

1. 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 wherein the friction-locking unit and the form-locking unit are associated with a common rotatable coupling element of the two coupling elements;
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;
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;
and wherein the first and second control line connections control a movement of a valve slide of the directional valve.

2. The transmission device according to claim 1 , wherein the valve slide has 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.

3. The transmission device according to claim 1 , 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.

4. The transmission device according to claim 1 , 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.

5. The transmission device according to claim 1 , 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.

6. The transmission device according to claim 1 , 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.

7. The transmission device according to claim 3 , further comprising a working pressure system which, in at least one state, is connected in pressure terms to the third control line connection.

8. The transmission device according to claim 7 , 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.

9. The transmission device according to claim 1 , 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

• F16D21/00

  Systems comprising a plurality of actuated clutches (for synchronisation F16D23/04) · CPC title

• F16H61/0265

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

• F16D23/06 Primary

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

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title

• F16H2200/2012

  with four sets of orbital gears · CPC title