Spark ignition internal combustion engine

Patent metadata

Field	Value
Publication number	US-9587618-B2
Application number	US-201214129692-A
Country	US
Kind code	B2
Filing date	Jul 4, 2012
Priority date	Jul 4, 2011
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

An spark ignition type internal combustion engine allows the spark discharge by the ignition plug to react with the electric field created in the combustion chamber and generates the plasma, thereby igniting the fuel air mixture to reduce the emission of the unburned fuel and to improve fuel efficiency of the internal combustion engine in a spark ignition type internal combustion engine that allows an electric field created in a combustion chamber to react with a spark discharge by an ignition plug and generates plasma, thereby igniting fuel air mixture. The engine includes an electromagnetic wave emission device that emits an electromagnetic wave in the combustion chamber when the fuel air mixture is combusted, and a protruding member protruding from a partitioning surface that partitions the combustion chamber. At least a part of the protruding member is made of a conductor.

First claim

What is claimed is:

1. A spark ignition type internal combustion engine, comprising:
an electromagnetic wave emission device that emits an electromagnetic wave in the combustion chamber when the fuel air mixture is combusted;
an ignition plug that performs a spark discharge and allows an electric field created with the electromagnetic wave to react with the spark discharge in the combustion chamber, thereby generating plasma therein;
a cylinder head having an intake side at which an intake port is located and an exhaust side at which an exhaust port is located; and
a plurality of protruding members protruding from the cylinder head in the combustion chamber so as to generate additional plasma in a vicinity of each protruding member, wherein at least a part of each protruding member is made of a conductor,
wherein a flame spreads from a location where the plasma is generated as a result of the reaction of the spark discharge with the electric field, propagation speed of the flame spreading at the intake side in the combustion chamber being slower than propagation speed of the flame spreading at the exhaust side in the combustion chamber, and
wherein each protruding member is provided at the intake side or the exhaust side, the number of the protruding members provided at the intake side being greater than the number of the protruding members provided at the exhaust side, thereby generating more plasma on the intake side than the exhaust side so as to increase the propagation speed of the flame on the intake side.

2. The spark ignition type internal combustion engine according to claim 1 , wherein
the electromagnetic wave emission device emits the electromagnetic wave when the spark discharge occurs.

3. The spark ignition type internal combustion engine according to claim 1 , wherein
the electromagnetic wave emission device emits the electromagnetic wave after the fuel air mixture is ignited by the plasma generated by the reaction of the spark discharge with the electric field.

4. The spark ignition type internal combustion engine according to claim 1 , wherein
the conductor of each protruding member is constituted by a metal wire having a length of one quarter wavelength of the electromagnetic wave emitted by the electromagnetic wave emission device.

5. The spark ignition type internal combustion engine according to claim 1 , wherein
the plurality of the protruding members are arranged on a surface of the cylinder head at an interval of one quarter wavelength or less of the electromagnetic wave emitted by the electromagnetic wave emission device.

6. The spark ignition type internal combustion engine according to claim 1 , wherein
the combustion chamber is formed in a cylinder in the form of a cylindrical shape, and the ignition plug is arranged at a central part of a ceiling surface of the combustion chamber, while each protruding member is arranged between the ignition plug and a wall surface of the combustion chamber on the ceiling surface of the combustion chamber.

7. The spark ignition type internal combustion engine according to claim 2 , wherein
the electromagnetic wave emission device emits the electromagnetic wave after the fuel air mixture is ignited by the plasma generated by the reaction of the spark discharge with the electric field.

8. The spark ignition type internal combustion engine according to claim 1 , wherein no protruding member is provided at the exhaust side.

Assignees

• Ikeda Yuji
• Nishiyama Atsushi
• Serizawa Takeshi
• Oi Hiroaki
• Imagineering Inc

Inventors

• Ikeda Yuji
• Nishiyama Atsushi
• Serizawa Takeshi
• Oi Hiroaki

Classifications

• H01T13/50

  having means for ionisation of gap (H01T13/52 takes precedence) · CPC title

• F02P3/01 Primary

  Electric spark ignition installations without subsequent energy storage, i.e. energy supplied by an electrical oscillator (with magneto- or dynamo-electric generators F02P1/00; piezoelectric ignition F02P3/12; with continuous electric spark F02P15/10) · CPC title

• F02P23/045 Primary

  using electromagnetic microwaves · CPC title

• F02P9/007

  by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition · CPC title

• F02P23/04

  Other physical ignition means, e.g. using laser rays · CPC title