Intake system for internal combustion engine

Patent metadata

Field	Value
Publication number	US-9032914-B2
Application number	US-201313856193-A
Country	US
Kind code	B2
Filing date	Apr 3, 2013
Priority date	Apr 5, 2012
Publication date	May 19, 2015
Grant date	May 19, 2015

Abstract

An intake system for an engine includes an intake manifold having a surge tank room and branch passages, and a water-cooling type cooler having a first cooling unit and second cooling units. The surge tank room is disposed on a downstream side of a supercharger in a flow direction of intake air. Supercharged intake air flowing into the surge tank room is distributed among intake ports respectively through the branch passages. The first cooling unit is inserted in the surge tank room, and cools supercharged intake air which has flowed into the intake manifold through heat exchange between supercharged intake air and coolant flowing in the first cooling unit. The second cooling units are inserted respectively in the intake ports, and cool internal EGR gas, which has been recirculated into their corresponding intake ports, through heat exchange between internal EGR gas and coolant flowing in the second cooling units.

First claim

What is claimed is:

1. An intake system for an internal combustion engine having a plurality of cylinders into which supercharged intake air passing through a supercharger is introduced via a plurality of intake ports respectively, the intake system comprising:
an intake manifold that includes:
a surge tank room that is disposed on a downstream side of the supercharger in a flow direction of intake air; and
a plurality of branch passages through which the supercharged intake air flowing into the surge tank room is distributed among the plurality of intake ports respectively; and
a water-cooling type cooler that includes:
a first cooling unit that is inserted and arranged in the surge tank room and that is configured to cool the supercharged intake air which has flowed into the intake manifold through heat exchange between the supercharged intake air and coolant flowing in the first cooling unit; and
a plurality of second cooling units that are inserted and arranged respectively in the plurality of intake ports and that are configured to cool internal exhaust gas recirculation (EGR) gas, which has been recirculated into their corresponding plurality of intake ports, through heat exchange between the internal EGR gas and coolant flowing in the plurality of second cooling units, wherein:
the water-cooling type cooler further includes a plurality of intermediate connection parts that respectively connect together the first cooling unit and the plurality of second cooling units;
the plurality of intermediate connection parts are inserted and arranged respectively in the plurality of branch passages;
the intake manifold further includes:
an opposing wall part that is opposed to the first cooling unit with a predetermined distance between the opposing wall part and the first cooling unit; and
a surge chamber which is located between the first cooling unit and the opposing wall part and through which the supercharged intake air is capable of flowing;

the water-cooling type cooler further includes a plurality of tubes that are arrange in parallel in a longitudinal direction of the surge tank room, in a width direction of the plurality of branch passages, and in a width direction of the plurality of intake ports;
the first cooling units, the plurality of second cooling units, and the plurality of intermediate connection parts are constituted of the plurality of tubes; and
coolant taken in from outside is distributed among the plurality of tubes, so that coolant flows in parallel through the first cooling units, the plurality of intermediate connection parts, and the plurality of second cooling units, respectively and then merges together to be sent out to the outside.

2. The intake system according to claim 1 , wherein the water-cooling type cooler is an integration of the first cooling unit and the plurality of second cooling units.

3. The intake system according to claim 1 , wherein:
the water-cooling type cooler further includes:
a coolant distribution part that is configured to distribute coolant, which has flowed into the water-cooling type cooler from outside, among the plurality of tubes; and
a coolant merging part that is configured to merge together coolant from the plurality of tubes to flow the coolant out to the outside; and
the coolant distribution part and the coolant merging part are connected to end portions of the plurality of tubes.

4. The intake system according to claim 3 , wherein the plurality of branch passages are arranged in parallel in the longitudinal direction of the surge tank room.

5. The intake system according to claim 3 , wherein the coolant distribution part or the coolant merging part is located on an opposite side of the first cooling unit from the plurality of second cooling units.

6. The intake system according to claim 1 , wherein:
the intake manifold further includes an intake air sealing part that is in contact with the first cooling unit; and
the intake air sealing part is configured to seal a clearance between the intake manifold and the first cooling unit.

Assignees

• Denso Corp

Inventors

• Sugiura Yoshihiko
• Ino Masao
• Kamiya Sadayuki

Classifications

• F02M25/0737

  Mechanical Engineering · mapped topic

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F02M35/10222 Primary

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

• F02M35/116

  for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft · CPC title

• F01P3/00 Primary

  Liquid cooling · CPC title