Mixing valve for an internal combustion engine of a motor vehicle

Patent metadata

Field	Value
Publication number	US-9482194-B2
Application number	US-201314390318-A
Country	US
Kind code	B2
Filing date	Mar 26, 2013
Priority date	Apr 5, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

In a mixing valve for an internal combustion engine of a motor vehicle, the distance between pivot axes of two flaps is smaller than the diameter of the largest flap. The flaps are also connected to a single drive device. The drive device ensures a collision-free coupling of the movements of the flaps.

First claim

The invention claimed is:

1. A mixing valve ( 6 ) of an internal combustion engine ( 1 ) of a motor vehicle, comprising:
an intake duct ( 4 );
an exhaust-gas recirculation duct ( 5 );
a first flap ( 10 ), having a first flap pivot axis ( 12 ), arranged in the intake duct ( 4 );
a second flap ( 11 ), having a second flap pivot axis ( 13 ), arranged in the exhaust-gas recirculation duct ( 5 ), wherein the intake duct ( 4 ) and the exhaust-gas recirculation duct ( 5 ) issue into a common collecting duct ( 7 );
a drive device ( 8 ) configured to drive the first and second flaps ( 10 , 11 ), the drive device ( 8 ) having a single electric motor ( 9 ), the electric motor ( 9 ) being connected to the first and second flaps ( 10 , 11 ) via respective positioning structures ( 14 , 15 ); and
a coupling ( 18 ) arranged between one positioning structure ( 14 ) and the first flap ( 10 ), the coupling ( 18 ) being arranged at the first flap pivot axis ( 12 ),
wherein a spacing between the first flap pivot axis ( 12 ) and the second flap pivot axis ( 13 ) is smaller than a diameter of the first flap ( 10 ), and pivoting movements of the first and second flaps ( 10 , 11 ) are coupled in a collision-free manner.

2. The mixing valve as claimed in claim 1 , wherein the first and second flaps ( 10 , 11 ) are guided in a common direction.

3. The mixing valve as claimed in claim 1 , wherein at least one of the positioning structures ( 14 ) has a gearwheel mechanism ( 16 ) with multiple gearwheels ( 17 ).

4. The mixing valve as claimed in claim 1 , wherein, in a central position of the drive device ( 8 ), both of the first and second flaps ( 10 , 11 ) are open, and in end positions of the drive device ( 8 ), one or the other of the first and second flaps ( 10 , 11 ) is closed.

5. A mixing valve ( 6 ) of an internal combustion engine ( 1 ) of a motor vehicle, comprising:
an intake duct ( 4 );
an exhaust-gas recirculation duct ( 5 );
a first flap ( 10 ), having a first flap pivot axis ( 12 ), arranged in the intake duct ( 4 );
a second flap ( 11 ), having a second flap pivot axis ( 13 ), arranged in the exhaust-gas recirculation duct ( 5 ), wherein the intake duct ( 4 ) and the exhaust-gas recirculation duct ( 5 ) issue into a common collecting duct ( 7 );
a drive device ( 8 ) configured to drive the first and second flaps ( 10 , 11 ), the drive device ( 8 ) having a single electric motor ( 9 ), the electric motor ( 9 ) being connected to the first and second flaps ( 10 , 11 ) via respective positioning structures ( 14 , 15 ); and
a coupling ( 18 ) arranged between one positioning structure ( 14 ) and the first flap ( 10 ),
wherein a spacing between the first flap pivot axis ( 12 ) and the second flap pivot axis ( 13 ) is smaller than a diameter of the first flap ( 10 ), and pivoting movements of the first and second flaps ( 10 , 11 ) are coupled in a collision-free manner,
wherein at least one of the positioning structures ( 14 ) has a gearwheel mechanism ( 16 ) with multiple gearwheels ( 17 ), and
wherein the coupling ( 18 ) is a claw-type coupling with lost motion ( 19 ).

6. The mixing valve as claimed in claim 5 , wherein at least one of the positioning structures ( 15 ) has a control cam ( 20 ) configured to guide a control part ( 21 ).

7. The mixing valve as claimed in claim 6 , wherein the control cam ( 20 ) is arranged on an outer contour of a driven wheel ( 23 ), and the control part ( 21 ) is a roller connected to one of the first and second flaps ( 11 ) and rolls on the control cam ( 20 ).

8. The mixing valve as claimed in claim 7 , wherein the wheel ( 23 ) having the control cam ( 20 ) is arranged on a gearwheel ( 17 ) of the gearwheel mechanism ( 16 ).

Assignees

• Continental Automotive Gmbh

Inventors

• Schröder Lothar

Classifications

• F02M35/10255 Primary

  Arrangements of valves; Multi-way valves (F02M35/10032 takes precedence; valves in the plenum chamber F02M35/10065; check valves F02M35/10275) · CPC title

• F02M26/21

  with EGR valves located at or near the connection to the intake system · CPC title

• F16K11/0525 Primary

  the closure members being pivoted around an essentially central axis · CPC title

• F02M26/64

  the EGR valve being operated together with an intake air throttle · CPC title

• F16K11/165

  with the rotating spindles parallel to the closure members · CPC title