Intake manifold with integrated mixer

Patent metadata

Field	Value
Publication number	US-10815940-B2
Application number	US-201816038849-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jul 18, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A manifold for use with an internal combustion engine defining at least one cylinder and an EGR circuit, the manifold including a first chamber having an inlet and an outlet, where the outlet is open to the cylinder, and a second chamber having a first port open to the first chamber, a second port open to the first chamber downstream of the first port, and a third port open to the EGR circuit.

First claim

The invention claimed is:

1. A manifold for use with an internal combustion engine including a cylinder and an EGR circuit, the manifold comprising:
a first chamber having an inlet and an outlet, wherein the outlet is open to the cylinder of the internal combustion engine; and
a second chamber having a first port open to the first chamber, a second port open to the first chamber, and a third port in fluid communication with the EGR circuit,
wherein the manifold is configured to produce a first flow pattern and a second flow pattern different than the first flow pattern based at least in part on the flow rate of gasses within the EGR circuit, and
wherein gas flows from the first chamber into the second chamber through the first port when the manifold produces the first flow pattern, and wherein gas flows from the second chamber into the first chamber through the first port when the manifold produces the second flow pattern.

2. The manifold of claim 1 , wherein the first port is larger in area than the second port.

3. The manifold of claim 1 , wherein the inlet of the first chamber is configured to receive compressed atmospheric air from a turbocharger.

4. The manifold of claim 1 , wherein the first port defines a cross-sectional area that is between 20% and 25% of an average cross-sectional area of the first chamber.

5. The manifold of claim 1 , wherein the second chamber and the first chamber share at least one common wall.

6. The manifold of claim 1 , wherein the manifold includes a body having a cylindrical wall, and wherein both the first chamber and the second chamber are at least partially defined by the cylindrical wall.

7. The manifold of claim 1 , wherein the third port is positioned between the first port and the second port.

8. The manifold of claim 1 , wherein the second port is triangular in cross-sectional shape.

9. The manifold of claim 1 , wherein gas flows from the second chamber into the first chamber through both the first port and the second port when the manifold produces the second flow pattern.

10. The manifold of claim 1 , wherein the second port is downstream of the first port.

11. The manifold of claim 1 , wherein manifold switches from the second flow pattern to the first flow pattern when the EGR circuit flow rate drops below a predetermined flow limit.

Assignees

• Deere & Co

Inventors

• Lohmann Craig W

Classifications

• F02M26/40

  with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations · CPC title

• F02M35/10222

  Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission · CPC title

• F02M26/19 Primary

  Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system · CPC title

• F02M35/104

  Intake manifolds · CPC title

• F02M35/10045

  Multiple plenum chambers; Plenum chambers having inner separation walls (for V-engines F02M35/116; for resonance charging F02B27/02) · CPC title