Internal combustion engine

Patent metadata

Field	Value
Publication number	US-2016258346-A1
Application number	US-201615058250-A
Country	US
Kind code	A1
Filing date	Mar 2, 2016
Priority date	Mar 4, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

Stable combustion is achieved in an internal combustion engine, in cases where an air stream has occurred in a cylinder. The engine includes a fuel injection valve having a first nozzle hole and a second nozzle hole, and an spark plug disposed at a position through which the swirling flow flows, and which is at the downstream side of the flow of the swirling flow from an extension line of the first nozzle hole and at the upstream side of the flow of the swirling flow from an extension line of the second nozzle hole, for igniting a spray of fuel injected from the fuel injection valve, wherein the first nozzle hole and the second nozzle hole are formed in such a manner that the shortest distance from the extension line of the first nozzle hole to the spark plug becomes longer than the shortest distance from the extension line of the second nozzle hole to the spark plug.

First claim

What is claimed is:

1 . An internal combustion engine in which a swirling flow occurs in a cylinder, said engine comprising:
a fuel injection valve that has a plurality of nozzle holes including at least a first nozzle hole and a second nozzle hole for injecting fuel into said cylinder; and an spark plug that is disposed at a position through which said swirling flow flows, and which is at the downstream side of the flow of said swirling flow from an extension line of said first nozzle hole and at the upstream side of the flow of said swirling flow from an extension line of said second nozzle hole, said spark plug to ignite a spray of fuel injected from said fuel injection valve; wherein said first nozzle hole and said second nozzle hole are formed in such a manner that a shortest distance from the extension line of said first nozzle hole to said spark plug becomes longer than a shortest distance from the extension line of said second nozzle hole to said spark plug.

2 . The internal combustion engine as set forth in claim 1 , wherein
said first nozzle hole and said second nozzle hole are formed in such a manner that the extension line of said first nozzle hole and the extension line of said second nozzle hole do not overlap with each other in a flow direction of said swirling flow.

3 . The internal combustion engine as set forth in claim 2 , wherein
said first nozzle hole and said second nozzle hole are formed in such a manner that an angle formed by the extension line of said first nozzle hole and a central axis of said fuel injection valve becomes larger than an angle formed by the extension line of said second nozzle hole and the central axis of said fuel injection valve.

4 . The internal combustion engine as set forth in claim 2 , wherein
said first nozzle hole and said second nozzle hole are formed in such a manner that a fuel spray from said first nozzle hole does not overlap with a half or more of a fuel spray from said second nozzle hole in the flow direction of said swirling flow.

5 . The internal combustion engine as set forth in claim 4 , wherein
said first nozzle hole and said second nozzle hole are formed in such a manner that an angle formed by the extension line of said first nozzle hole and a central axis of said fuel injection valve becomes larger, by at least 5 degrees, than an angle formed by the extension line of said second nozzle hole and the central axis of said fuel injection valve.

6 . The internal combustion engine as set forth in claim 1 , wherein
directions of said first nozzle hole and said second nozzle hole are shifted to the upstream side of said swirling flow from a region in which the fuel sprays from the fuel injection nozzle can be ignited by said spark plug, by an angle by which the fuel sprays are rotated due to said swirling flow in a duration from the fuel injection by said fuel injection valve until the ignition by said spark plug, the shortest distance from the extension line of said first nozzle hole to said spark plug is made longer than the shortest distance from the extension line of said second nozzle hole to said spark plug.

7 . The internal combustion engine as set forth in claim 1 , wherein
said swirling flow is a swirl turning around the central axis of said fuel injection valve.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kitazume Yoshiyuki
• Yarino Motonari
• Kaneko Naoya

Classifications

• F02B2023/103

  the injector having a multi-hole nozzle for generating multiple sprays · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title

• F02B23/105 Primary

  the fuel is sprayed directly onto or close to the spark plug · CPC title

• F02M61/14

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title