Tangential mixer and method

1. A method for mixing a first fluid and a second fluid using a tangential mixer, comprising the steps of:

directing the first fluid through a bore in a first direction;

guiding the second fluid through an inlet in a second direction;

collecting the second fluid in a chamber before mixing the first fluid and the second fluid;

mixing the first fluid and the second fluid to yield a mixture having a spiral flow pattern;

passing the second fluid radially through at least one diffuser;

wherein the first direction and the second direction are at an angle.

2. The method of claim 1 , wherein the angle is less than 45 degrees.

3. The method of claim 1 , wherein the first direction and the second direction are perpendicular and the angle is zero.

4. The method of claim 1 , further comprising the step of adding the second fluid through more than one inlets.

5. An internal combustion engine comprising:

a crankcase having a plurality of cylinders;

an inlet system and an exhaust system in fluid communication with the plurality of cylinders;

a turbocharger in fluid communication with the intake system and the exhaust system;

an exhaust gas recirculation system in fluid communication with the exhaust system and the intake system;

a tangential mixer, disposed in the intake system and in fluid communication with the exhaust system, wherein the tangential mixer includes an inner bore, wherein the inner bore is disposed in the bore of the tangential mixer, wherein the inner bore has at least one diffuser hole, wherein the at least one diffuser hole is in fluid communication with the bore and the exhaust system, wherein the inner bore has a substantially cylindrical shape, the cylindrical shape having a radius, and wherein the at least one diffuser hole is disposed along a radial direction with respect to the inner bore.

6. The internal combustion engine of claim 5 , wherein a mixture exiting the tangential mixture has a substantially spiral flow pattern.

7. The internal combustion engine of claim 5 , wherein the tangential mixer includes a bore and at least one gas inlet.

8. The internal combustion engine of claim 7 , wherein the at least one gas inlet is oriented tangentially to a perimeter of the bore.

9. A tangential mixer, comprising:

an air inlet and a mixture outlet;

a bore having a bore centerline and a bore perimeter;

at least one gas inlet having an inlet centerline that is oriented tangentially to the bore perimeter;

an inner bore, wherein the inner bore is disposed in the bore of the tangential mixer, wherein the inner bore has at least one diffuser hole, wherein the at least one diffuser hole is in fluid communication with the bore and the at least one gas inlet, wherein the inner bore has a substantially cylindrical shape, the cylindrical shape having a radius, and wherein the at least one diffuser hole is disposed along a radial direction with respect to the inner bore;

wherein the inlet centerline is within a cone, the cone having a vertex point on the inlet centerline.

10. The tangential mixer of claim 9 , further comprising a chamber disposed between the bore and the inner bore.

11. The tangential mixer of claim 9 , further comprising a second gas inlet, wherein the second gas inlet has a second inlet centerline.

12. The tangential mixer of claim 11 , wherein the bore centerline is perpendicular to a plane defined by the inlet centerline and the second inlet centerline.

13. The tangential mixer of claim 9 , wherein the cone has an included angle at the vertex.

14. The tangential mixer of claim 13 , wherein the included angle is zero.

15. The tangential mixer of claim 13 , wherein the included angle is less than 90 degrees.