Fuel injection unit for internal combustion engine

Patent metadata

Field	Value
Publication number	US-10184435-B2
Application number	US-201615362348-A
Country	US
Kind code	B2
Filing date	Nov 28, 2016
Priority date	Apr 20, 2016
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

The present disclosure provides a fuel injection unit for an internal combustion engine. The fuel injection unit includes: a separator that is disposed in an intake port to supply air into a combustion chamber formed in an engine head, and that divides a channel for air into an upper channel and a lower channel; a blade disposed ahead of the separator and opening or closing the upper channel or the lower channel by rotating; and a first injector disposed over the intake port. In particular, when the first injector injects fuel, the blade does not interfere with the fuel.

First claim

What is claimed is:

1. A fuel injection unit for an internal combustion engine, the fuel injection unit comprising:
a separator disposed in an intake port configured to supply air into a combustion chamber formed in an engine head, the separator configured to divide a channel for air into an upper channel and a lower channel;
a blade disposed ahead of the separator, and configured to open or close the upper channel or the lower channel by rotating about a rotary shaft that is disposed on an inner wall surface of the intake port and lower than the separator;
a first injector disposed over the intake port; and
a second injector arranged below the intake port and configured to inject fuel directly into the combustion chamber,
wherein when the first injector injects fuel, the blade does not interfere with the fuel,
wherein a first end of the blade is coupled to the rotary shaft,
wherein a second end of the blade opens the upper channel and the lower channel when the second end contacts to the inner wall, and the blade closes the lower channel when the blade rotates toward the separator, and
wherein the first injector is in a form of a combined multiple injectors that have smaller capacity than a capacity of the first injector in a form of a single injector to accurately control fuel according to an amount of air without a loss of fuel when the combined multiple injectors are used.

2. The fuel injection unit of claim 1 , wherein a rear end of the separator is positioned behind an end of the first injector.

3. The fuel injection unit of claim 1 , wherein the separator and the blade is integrally provided in the intake port.

4. The fuel injection unit of claim 1 , wherein the first injector is disposed in the engine head.

5. The fuel injection unit of claim 1 , wherein a valve angle of the engine head is a predetermined value or less such that the first injector is disposed in the intake port.

6. The fuel injection unit of claim 1 , wherein an avoiding groove is formed at an end of the separator to avoid interference with the first injector when fuel is injected.

7. The fuel injection unit of claim 1 , wherein a plurality of avoiding grooves are formed at an end of the separator to avoid interference with the combined multiple first injectors when fuel is injected.

8. The fuel injection unit of claim 1 , wherein the rotary shaft is connected to a driving unit and rotated by the driving unit.

9. The fuel injection unit of claim 1 , wherein when the blade opens the lower channel, the blade forms a surface contact with the inner wall surface of the intake port so as to inhibit interference with the air flowing into the combustion chamber.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Chu Dong Ho

Classifications

• F02M35/10177

  Engines having multiple fuel injectors or carburettors per cylinder · CPC title

• F02M35/10281

  Means to remove, re-atomise or redistribute condensed fuel; Means to avoid fuel particles from separating from the mixture (apparatus for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00; other apparatus for treating combustion-air, fuel or fuel-air mixture F02M33/00) · CPC title

• F02M35/10216

  Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators · CPC title

• F02M35/10262 Primary

  Flow guides, obstructions, deflectors or the like (for generating a charge motion in the cylinder F02B31/00; for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00) · CPC title

• F02M61/145

  the injection nozzle opening into the air intake conduit · CPC title