Internal combustion engine

Patent metadata

Field	Value
Publication number	US-10619606-B2
Application number	US-201716077331-A
Country	US
Kind code	B2
Filing date	Jan 11, 2017
Priority date	Feb 15, 2016
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

An internal combustion engine includes: an engine body ( 10 ) having at least one cylinder; and an air-supply manifold ( 4 ) including an adjustment pipe ( 12 ). The length of the adjustment pipe is set so that a first pressure wave ( 14 A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave ( 14 B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.

First claim

The invention claimed is:

1. An internal combustion engine for power generation, comprising:
an engine body having at least one cylinder;
an air-supply pipe connected to the at least one cylinder via an air-supply manifold; and
an adjustment pipe having a predetermined length and extending from the air-supply manifold,
wherein the predetermined length is set so that a first pressure wave propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other, in at least a part of the at least one cylinder, and
wherein the predetermined length is set on the basis of an air-supply temperature or an air-fuel mixture composition at the time of a rated output of the engine body.

2. The internal combustion engine according to claim 1 ,
wherein the adjustment pipe is disposed on a bend portion of the air-supply manifold.

3. The internal combustion engine according to claim 1 ,
wherein the adjustment pipe includes an inlet portion facing the at least one cylinder.

4. The internal combustion engine according to claim 1 ,
wherein the engine body is a single-cylinder engine having a single cylinder.

5. The internal combustion engine according to claim 1 ,
wherein the engine body is a multi-cylinder engine having a plurality of cylinders.

6. The internal combustion engine according to claim 5 ,
wherein the at least one cylinder includes a first cylinder group and a second cylinder group,
wherein the air-supply manifold includes a first manifold connected to the first cylinder group and a second manifold connected to the second cylinder group, and
wherein the adjustment pipe is provided to bring the first manifold and the second manifold into communication with each other.

7. The internal combustion engine according to claim 1 ,
wherein the adjustment pipe includes an airflow resistor for generating airflow resistance against supply air which flows through the adjustment pipe.

8. The internal combustion engine according to claim 7 ,
wherein the airflow resistor comprises a porous material.

9. The internal combustion engine according to claim 8 ,
wherein the airflow resistor is configured to have a variable airflow resistance value, and
wherein the internal combustion engine comprises:
a parameter acquisition part configured to obtain a parameter related to an operation state of the engine body; and
a control part configured to control airflow resistance of the airflow resistor variably, on the basis of the parameter obtained by the parameter acquisition part.

Assignees

• Mitsubishi Heavy Ind Engine & Turbocharger Ltd

Inventors

• Takemoto Daisuke
• Yuuki Akihiro
• Ishiguro Tatsuo
• Ogura Kazuo
• Furukawa Yuta
• Osafune Shinnosuke

Classifications

• F02M35/10295 Primary

  Damping means, e.g. tranquillising chamber to dampen air oscillations (intake silencers F02M35/12) · CPC title

• F02M35/104

  Intake manifolds · CPC title

• F02D2200/101

  Engine speed · CPC title

• F02D2200/0414

  Air temperature · CPC title

• F02B75/16

  Engines characterised by number of cylinders, e.g. single-cylinder engines (F02B75/26 takes precedence) · CPC title