Injector built-in ignition device, internal combustion engine, gas burner, and ignition device

Patent metadata

Field	Value
Publication number	US-10161369-B2
Application number	US-201515505402-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Aug 22, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

The object is to provide an injector with a built-in ignition device that can achieve downsize of device as a whole without changing significantly the structure of a fuel injection device. The injector with the built-in ignition device comprises an ignition device 3 and a fuel injection device 2. In the ignition device 3, an electromagnetic wave oscillated from an electromagnetic wave oscillator MW is boosted by a booster that is constituted by a resonance structure, a potential difference between a ground electrode 51 and a discharge electrode 31 is increased, and a discharge is caused. In the fuel injection device 2, a valve body part of a nozzle needle 24 is moved toward or away from a valve seat (orifis) 23a, and thereby, the fuel injection control is performed. Then, the resonance structure is formed by a dielectric member 30 that is connected to the electromagnetic wave oscillator and formed on the surface of a fuel injection pipe 21, and an inner wall surface 50a of a mounting port 50 for an injector of a cylinder head 5. A discharge electrode 31 is a projection that is formed on the surface of the fuel injection pipe 21, and a discharge is caused by making a position of the wall surface of the mounting port 5 that is closest to the discharge electrode 31 as a ground electrode 51.

First claim

The invention is:

1. An injector with a built-in ignition device, that is arranged in a mounting port of a cylinder head of an internal combustion engine and comprises:
the built-in ignition device comprising a booster and a discharger, the booster having a resonance structure configured to boost an inputted electromagnetic wave, the discharger being provided at an output side of the booster; and
a fuel injection device comprising a fuel injection pipe with a fuel injection port and configured to perform a fuel injection from the fuel injection port of the fuel injection pipe,
wherein the resonance structure is configured with a dielectric member formed on a surface of the fuel injection pipe and an inner wall surface of the mounting port of the cylinder head, and
wherein the discharger comprises a projection formed on the surface of the fuel injection pipe at a position adjacent to the inner wall surface of the mounting port of the cylinder head and configured to cause a discharge between the projection and the wall surface of the mounting port.

2. An internal combustion engine, comprising the injector with the built-in ignition device according to claim 1 .

3. An internal combustion engine comprising:
a main injector mounted on an intake port provided with an intake valve; and
the injector with the built-in ignition device according to claim 1 , that is mounted to a cylinder head,
wherein the internal combustion engine is configured to perform a fuel injection from the main injector when the intake valve is open, and to perform the fuel injection from the injector with the built-in ignition device after the intake valve is closed.

4. The injector according to claim 1 , wherein a capacitor element C is formed between the inner wall surface the housing member and the dielectric member, and the capacitor element C and an inductor element L of the dielectric member satisfy the following formula:

f
=

1

2
⁢
π
⁢

LC

in which “f” indicates a frequency of the electromagnetic wave.

5. An injector with a built-in ignition device, that is arranged in a mounting port of a cylinder head of an internal combustion engine and comprises:
the built-in ignition device comprising a booster and a discharger, the booster having a resonance structure configured to boost an inputted electromagnetic wave, the discharger being provided at an output side of the booster; and
a fuel injection device comprising a fuel injection pipe with a fuel injection port and configured to perform a fuel injection from the fuel injection port of the fuel injection pipe,
wherein the resonance structure is configured with a dielectric member that is formed on a surface of the fuel injection pipe and a conductor member that covers a surface of the dielectric member, and
wherein the discharger comprises a projection formed on the surface of the fuel injection pipe at a position adjacent to the inner wall surface of the mounting port of the cylinder head and configured to cause a discharge between the projection and the wall surface of the mounting port.

6. The injector according to claim 5 , wherein a capacitor element C is formed between the inner wall surface the housing member and the dielectric member, and the capacitor element C and an inductor element L of the dielectric member satisfy the following formula:

f
=

1

2
⁢
π
⁢

LC

in which “f” indicates a frequency of the electromagnetic wave.

7. An injector with a built-in ignition device, that is arranged in a mounting port of a cylinder head of an internal combustion engine and comprises:
the built-in ignition device comprising a booster and a discharger, the booster having a resonance structure configured to boost an inputted electromagnetic wave, the discharger being provided at an output side of the booster; and
a fuel injection device comprising a fuel injection pipe with a fuel injection port and configured to perform a fuel injection from the fuel injection port of the fuel injection pipe,
wherein the resonance structure is configured with a dielectric member with a high dielectric constant which is eight or more of relative permittivity, the dielectric member being formed on a surface of the fuel injection pipe, and
wherein the discharger comprises a projection formed on the surface of the fuel injection pipe at a position adjacent to the inner wall surface of the mounting port of the cylinder head and configured to cause a discharge between the projection and a wall surface of the mounting port.

8. The injector according to claim 7 , wherein a capacitor element C is formed between the inner wall surface the housing member and the dielectric member, and the capacitor element C and an inductor element L of the dielectric member satisfy the following formula:

f
=

1

2
⁢
π
⁢

LC

in which “f” indicates a frequency of the electromagnetic wave.

9. A gas burner comprising:
a fuel injection device having an injection port and configured to inject fuel from the injection port;
a housing member configured to house therein the fuel injection device;
an oscillator configured to oscillate an electromagnetic wave;
a booster formed on a side surface of the fuel injection device and having a resonance structure configured to boost the electromagnetic wave;
an inlet port provided at a side of the injection port and configured to introduce air; and
a mixing tube configured to mix the fuel injected from the injection port with the air introduced from the inlet port,
wherein the resonance structure is configured with a dielectric member formed on the side surface of the fuel injection device and an inner wall surface of the housing member, and
wherein a capacitor element C is formed between the inner wall surface the housing member and the dielectric member, and the capacitor element C and an inductor element L of the dielectric member satisfy the following formula:

f
=

1

2
⁢
π
⁢

LC

in which “f” indicates a frequency of the electromagnetic wave.

Assignees

• Imagineering Inc

Inventors

• Ikeda Yuji
• Kanbara Seiji

Classifications

• F02P23/045

  using electromagnetic microwaves · CPC title

• F02P15/006

  Ignition installations combined with other systems, e.g. fuel injection (to advance or to retard the ignition spark F02P5/045) · CPC title

• F02P3/005

  having inductive-capacitance energy storage (capacitive storage installations using an intermediate charging inductance F02P3/0876) · CPC title

• F02P15/08

  having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders · CPC title

• F23D2207/00

  Ignition devices associated with burner · CPC title