Intake manifold

Patent metadata

Field	Value
Publication number	US-10156214-B2
Application number	US-201715637463-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jul 7, 2016
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

An intake manifold provided in an internal combustion engine to be mounted in a vehicle includes: a plurality of intake-air branch pipes; an EGR chamber configured such that EGR gas is introduced into the EGR chamber; and a plurality of EGR ports communicating the plurality of intake-air branch pipes with the EGR chamber. A chamber bottom face is provided with a plurality of recessed zones so as to correspond to the plurality of EGR ports, each of the plurality of recessed zones is provided near an opening of its corresponding EGR port on an EGR-chamber side, and all planes constituting the each of the plurality of recessed zones is configured to be inclined so as to be placed on a mounting lower side toward a position closer to the opening, as compared with a position away from the opening.

First claim

What is claimed is:

1. An intake manifold provided in an internal combustion engine to be mounted in a vehicle, the intake manifold comprising:
a plurality of intake air branch pipes;
an EGR chamber configured such that EGR gas is introduced into the EGR chamber;
a plurality of EGR ports communicating the plurality of intake-air branch pipes with the EGR chamber;
a chamber bottom face including
a plurality of recessed zones corresponding to the plurality of EGR ports, each of the recessed zones including a plurality of planes with a triangular shape, wherein

the number of recessed zones is the same as the number of EGR ports,
each of the plurality of recessed zones is provided adjacent an opening of its corresponding EGR port being positioned in a side of the EGR chamber, and
each plane of the plurality of recessed zones is inclined toward the corresponding EGR port with a vertex of the triangular shape positioned at the opening of the corresponding EGR port.

2. The intake manifold according to claim 1 , wherein
the chamber bottom face is entirely constituted by the plurality of recessed zones.

3. The intake manifold according to claim 1 , wherein:
the recessed zone is configured as a recess having a triangular pyramid shape having the vertex of each plane of the triangular pyramid shape of the corresponding recessed zone intersecting each other at the opening of the corresponding EGR port.

4. The intake manifold according to claim 1 , further comprising:
an EGR introduction passage inclined toward the chamber bottom face with a passage opening positioned in a second side of the EGR chamber adjacent the chamber bottom face, the EGR introduction passage being configured to introduce EGR gas into the EGR chamber.

5. The intake manifold according to claim 1 , wherein
the recessed zone is configured as a recess having a quadrangular pyramid shape with its bottom most point being where the vertex of each plane of the corresponding recessed zone intersect each other.

6. The intake manifold according to claim 1 , wherein
the plurality of recessed zones is configured such that a given interval is provided between the recessed zones adjacent to each other.

7. The intake manifold according to claim 1 , wherein the intake manifold is configured for a V-cylinder internal combustion engine.

8. The intake manifold according to claim 1 , wherein the opening of each EGR port extends into the chamber bottom face and includes a point lower than the corresponding EGR port at the opening, the point being adjacent the intersection of each vertex of the corresponding recessed zone.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kanzaki Yasunori

Classifications

• F02M26/09

  Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine · CPC title

• F02M26/17

  in relation to the intake system · CPC title

• F02M26/44

  in which a main EGR passage is branched into multiple passages · CPC title

• F02M35/1085

  the combustion chamber having multiple intake valves (modifying induction systems for imparting a rotation to the charge in the cylinder and having multiple air inlets F02B31/08; shape or arrangement of intake or exhaust channels in cylinder heads F02F1/42) · CPC title

• F02M35/10222 Primary

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