# US 2014/0196679 A1 · Internal combustion engine

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- Number: US 2014/0196679 A1
- Document ID: US20140196679A1
- Status: Published application
- Kind: A1
- Application number: 14/156,068
- Filed: 2014-01-15
- Published: 2014-07-17
- Earliest claimed: 2011-07-16
- Assignees: Imagineering, Inc.
- Applicants: IMAGINEERING, Inc.
- Inventors: Yuji Ikeda
- Web page: https://patentgrep.com/patent/US20140196679A1

## CPC

- F02P 19/00: Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P 3/01: 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)
- F02P 23/04: Other physical ignition means, e.g. using laser rays
- H05H 1/46: using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H1/26 takes precedence)
- H05H 1/463: {using antennas or applicators}
- F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00)
- H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS

## Abstract

To improve a propagation speed of a flame by effectively utilizing energy of the electromagnetic wave in the combustion chamber in an internal combustion engine that promotes combustion of fuel air mixture in a combustion chamber by means of an electromagnetic wave. The internal combustion engine includes, in addition to an internal combustion engine main body and an ignition device, an electromagnetic wave emission device and a control device. The electromagnetic wave emission device emits an electromagnetic wave to the combustion chamber while the flame is being propagated after ignition of the fuel air mixture. The control device controls a frequency of the electromagnetic wave emitted to the combustion chamber in view of a resonant frequency of the combustion chamber in accordance with an operation condition of the internal combustion engine main body or a propagation condition of the flame.

## Claims

### Claim 1

An internal combustion engine including an internal combustion engine main body formed with a combustion chamber, and an ignition device igniting fuel air mixture in the combustion chamber, wherein a repetitive combustion cycle including an ignition of fuel air mixture by the ignition device and combustion of the fuel air mixture is executed therein, the internal combustion engine comprises:
an electromagnetic wave emission device that emits an electromagnetic wave to the combustion chamber during a propagation of a flame following the ignition of the fuel air mixture; and
a control unit that controls a frequency of the electromagnetic wave emitted to the combustion chamber from the electromagnetic wave emission device in view of a resonant frequency of the combustion chamber in accordance with an operation condition of the internal combustion engine main body.

### Claim 2

An internal combustion engine including an internal combustion engine main body formed with a combustion chamber and an ignition device igniting fuel air mixture in the combustion chamber, wherein a repetitive combustion cycle including an ignition of fuel air mixture by the ignition device is executed therein, the internal combustion engine comprises:
an electromagnetic wave emission device that emits an electromagnetic wave to the combustion chamber during a propagation of a flame following the ignition of the fuel air mixture; and
a control unit that controls a frequency of the electromagnetic wave emitted to the combustion chamber from the electromagnetic wave emission device in view of a resonant frequency of the combustion chamber in accordance with a propagation condition of the flame.