Internal combustion engine

Patent metadata

Field	Value
Publication number	US-10107181-B2
Application number	US-201515312553-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	May 20, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An internal combustion engine includes: a cylinder block including multiple cylinders; a cylinder head; and a turbocharger including an inlet port connected to an exhaust outlet of the cylinder head. The inlet port includes a first wall portion located between one cylinder out of the two outermost cylinders and the central axis of the inlet port in the cylinder array direction, and a second wall portion located on the opposite side of the central axis of the inlet port from the first wall portion. The first wall portion includes a thick-walled portion that is greater in thickness than the second wall portion, and a thin-walled portion that is smaller in thickness than the thick-walled portion and is located upstream of the thick-walled portion in the direction of exhaust gas flow.

First claim

What is claimed is:

1. An internal combustion engine comprising:
a cylinder block including a plurality of cylinders each defining a combustion chamber and arranged in a cylinder array direction;
a cylinder head including an in-head manifold and an in-head coolant passage, the in-head manifold connecting to each of the combustion chambers of the plurality of cylinders, the in-head manifold configured to collect exhaust gases from the combustion chambers, and the in-head manifold connecting to an exhaust outlet of the cylinder head, a central axis of the exhaust outlet being located, in the cylinder array direction, closer to one cylinder of two outermost cylinders of the plurality of cylinders than a center of a straight line connecting central axes of the two outermost cylinders of the plurality of cylinders to each other, and the cylinder array direction being a direction of extension of a straight line that passes through central axes of each cylinder of the plurality of cylinders on a plane orthogonal to the central axes of the cylinders; and
a turbocharger including an inlet port, the inlet port connecting to the exhaust outlet of the cylinder head, the inlet port including a first wall portion and a second wall portion, the first wall portion being located between the one cylinder of the two outermost cylinders of the plurality of cylinders and a central axis of the inlet port in the cylinder array direction, the second wall portion being located on an opposite side of the central axis of the inlet port from the first wall portion, the first wall portion including a thick-walled portion and a thin-walled portion, the thick-walled portion being greater in wall thickness than the second wall portion, the thin-walled portion being smaller in wall thickness than the thick-walled portion, and the thin-walled portion being located upstream of the thick-walled portion in a direction of exhaust gas flow.

2. The internal combustion engine according to claim 1 , wherein:
the inlet port includes a flange;

the inlet port is connected at the flange to the cylinder head; and
the thin-walled portion is located adjacent to the flange, at a position downstream of the flange in the direction of exhaust gas flow.

3. The internal combustion engine according to claim 1 , wherein a wall portion of the inlet port located between the thin-walled portion and the thick-walled portion is gradually increased in wall thickness from the thin-walled portion to the thick-walled portion until a wall thickness of the wall portion becomes equal to a wall thickness of the thick-walled portion.

4. The internal combustion engine according to claim 1 , wherein a wall thickness of the inlet port is greatest at the thick-walled portion in a cross-section of the inlet port, the cross-section being orthogonal to the central axis of the inlet port.

5. The internal combustion engine according to claim 1 , wherein a wall thickness of the inlet port is smallest at the thin-walled portion in a cross-section of the inlet port, the cross-section being orthogonal to the central axis of the inlet port.

Assignees

• Toyota Motor Co Ltd
• Aisin Takaoka Ltd

Inventors

• Maeda Osamu
• Iida Tatsuo
• Yonezawa Koichi
• Kato Tomoya

Classifications

• Y02T10/144

  Cross-Sectional Technologies · mapped topic

• F02F1/243

  Cylinder heads and inlet or exhaust manifolds integrally cast together · CPC title

• F01N2260/10

  for avoiding stress caused by expansions or contractions due to temperature variations · CPC title

• H05K999/99

  Electricity · mapped topic

• F01N13/08

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title