Systems and methods for equalizing backpressure in engine cylinders

Patent metadata

Field	Value
Publication number	US-11686239-B2
Application number	US-202217716341-A
Country	US
Kind code	B2
Filing date	Apr 8, 2022
Priority date	Feb 5, 2016
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

An intake manifold is provided. A first inlet is structured to receive pressurized intake air from a turbocharger. A second inlet is structured to receive exhaust gas recirculation gas from an exhaust gas recirculation system. A third inlet is structured to receive fuel from a fuel line. A plurality of outlets are structured to be fluidly coupled to an engine. An intake manifold passage extends between each of the first, second, and third inlets, and the plurality of outlets. The intake manifold passage is shaped so as to cause at least two reversals in flow direction of each of the intake air, the exhaust gas recirculation gas, and the fuel through the intake manifold passage so as to improve mixing of each of the intake air, the exhaust gas recirculation gas, and the fuel.

First claim

What is claimed is:

1. An intake manifold, comprising:
a first inlet structured to receive pressurized intake air from a turbocharger;
a second inlet structured to receive exhaust gas recirculation gas from an exhaust gas recirculation system;
a third inlet structured to receive fuel from a fuel line;
a plurality of outlets structured to be fluidly coupled to an engine; and
an intake manifold passage extending between each of the first, second, and third inlets, and the plurality of outlets, the intake manifold passage shaped so as to cause at least two reversals in flow direction of each of the intake air, the exhaust gas recirculation gas, and the fuel through the intake manifold passage so as to improve mixing of each of the intake air, the exhaust gas recirculation gas, and the fuel.

2. The intake manifold of claim 1 , wherein the intake manifold passage is “S” shaped.

3. The intake manifold of claim 2 , wherein each of the plurality of drop-down runners have an equal length.

4. The intake manifold of claim 1 , wherein the intake manifold passage defines a plenum, and further comprising a plurality of drop-down runners from the plenum to the plurality of outlets.

5. The intake manifold of claim 4 , wherein the plurality of drop-down runners are configured to receive placement of port fuel injectors therein.

6. The intake manifold of claim 4 , wherein the plenum is positioned above a center line of the plurality of outlets.

Assignees

• Cummins Inc

Inventors

• Mohr Daniel J
• Pavlov Bogdan V
• Ajotikar Nikhil J
• Chen Yi-Cheng
• Eckroth David

Classifications

• F02M35/10052

  special shapes or arrangements of plenum chambers; Constructional details · CPC title

• F02M35/10

  Air intakes; Induction systems · CPC title

• F02M35/10026

  Plenum chambers · CPC title

• F02M35/104

  Intake manifolds · CPC title

• F02B37/025

  Multiple scrolls or multiple gas passages guiding the gas to the pump drive · CPC title