Abstract:
This ignition device includes an emission unit that emits electromagnetic waves to a combustion chamber of an internal combustion engine, and a generation unit that generates the electromagnetic waves to be supplied to said emission unit. The generation unit has an oscillator that generates electric signals of a frequency corresponding to said electromagnetic waves, a first amplifier circuit that amplifies said electric signals, and a second amplifier circuit that is provided downstream of the first amplifier circuit and performs amplification if the output from the first amplifier circuit is equal to or greater than a predetermined value. The first amplifier circuit turns on and off amplification of said electric signals in accordance with the timing at which the emission unit emits electromagnetic waves.
Abstract:
[Problem] To enable the use of gas fuels such as CNG in existing diesel engines. [Solution] The present invention is provided with: an injector; an igniter that uses a resonating structure to boost microwaves to perform electrical discharge; and a casing that houses the injector and the igniter. The igniter has: an electrical discharge part; a first section that transmits input microwaves; a second section that performs capactive coupling for matching the impedance of the microwaves and the igniter; and a third section that transmits the capacitively coupled microwaves to the electrical discharge part. The igniter is bent at the boundary of the first section and the second section, the boundary of the second section and third section, or in the first section.
Abstract:
The purpose of the present invention is to improve the radiation efficiency of high-frequency waves in an antenna structure in which a radiation antenna is integrated with a high-frequency transmission line of a laminated structure. The present invention is an antenna structure characterized by comprising: a columnar high-frequency transmission line which is constituted by laminating and integrating a plurality of sheet-like insulators, and which has a high-frequency transmission conductor embedded therein; a covering insulator that is laminated so as to cover the emission end surface from which high-frequency waves are emitted in the high-frequency transmission line; and a radiation antenna that is embedded inside the covering insulator or between the emission end surface and the covering insulator such that the high-frequency waves input from the emission end surface are radiated to a space to which the covering insulator is exposed.
Abstract:
The purpose of the present invention is to improve the radiation efficiency of high-frequency waves in an antenna structure in which a radiation antenna is integrated with a high-frequency transmission line of a laminated structure. The present invention is an antenna structure characterized by comprising: a columnar high-frequency transmission line which is constituted by laminating and integrating a plurality of sheet-like insulators, and which has a high-frequency transmission conductor embedded therein; a covering insulator that is laminated so as to cover the emission end surface from which high-frequency waves are emitted in the high-frequency transmission line; and a radiation antenna that is embedded inside the covering insulator or between the emission end surface and the covering insulator such that the high-frequency waves input from the emission end surface are radiated to a space to which the covering insulator is exposed.
Abstract:
This internal combustion engine (10) has an ignition device (12) that ignites an air-fuel mixture more forcefully than a spark discharge in a combustion chamber (20), wherein the discharge of unburned fuel is reduced and the fuel economy of the internal combustion engine (10) is improved. The internal combustion engine (10) is provided with an internal combustion engine body (11) with the combustion chamber (20) formed therein, and the ignition device (12) that ignites the air-fuel mixture in the combustion chamber (20) more forcefully than a spark discharge, as well as an electromagnetic-wave radiation device (13) that radiates, from an antenna (41), electromagnetic waves supplied by an electromagnetic-wave oscillator (32). The electromagnetic-wave radiation device (13) radiates electromagnetic waves from the antenna (41) and forms an electric field that increases the propagation speed of a flame.
Abstract:
An internal combustion engine (10) that uses active species to promote combustion, wherein active species are used to effectively increase flame propagation speed. The internal combustion engine (10) is provided with an engine body (11) in which an air-fuel mixture is combusted in a combustion chamber (20), and an active-species generator (13) that generates active species in regions ahead of the flame front as the flame propagates within the combustion chamber (20). The active-species generator (13) generates active species in regions through which the flame will pass before the flame front reaches the regions.
Abstract:
A plasma generation device (30) for generating electromagnetic wave plasma by emitting electromagnetic waves in a combustion chamber (21) in an internal combustion engine (20), wherein the combustion is promoted by increasing the contact between the electromagnetic wave plasma and the gas in the combustion chamber (21). An antenna (36) extends along the ceiling surface of the combustion chamber (21). A regulator (37), for altering the position of a strong electric field in the antenna when the electromagnetic waves have been supplied, is provided. During the electromagnetic wave plasma generation period, a control device (10) controls the regulator (37) and alters the position of the electromagnetic wave plasma on the basis of the state of the combustion chamber (21).
Abstract:
A plasma device (30) which ignites an air-fuel mixture by radiating the combustion chamber (10) of an engine (20) with electromagnetic waves, thereby generating electromagnetic plasma, wherein the fuel efficiency of the engine (20) is improved if the air-fuel mixture is subjected to lean-burn. During the flame propagation after the air-fuel mixture has been ignited in the combustion chamber (10), the combustion chamber (10) is irradiated with electromagnetic waves, and the electromagnetic waves are made to resonate with the electrons in the propagating flames. By having these electromagnetic waves resonate with the electrons in the propagating flames, the flame propagation rate is increased.
Abstract:
An internal combustion engine (20) in which the combustion of fuel injected from an injector (50) to a combustion chamber (21) is promoted by means of electromagnetic wave plasma, wherein electromagnetic wave plasma jets are generated corresponding to a plurality of jets injected from the injector (50). A plurality of antennas (36) are provided so as to correspond with a plurality of nozzle holes (55) in the injector (50). In the piston (46), the antennas (36) are arranged on an exposed surface (46a) exposed to the combustion chamber (21) at positions corresponding to the nozzle holes (55). When fuel is injected from the injector (50), electromagnetic wave plasma is generated by electromagnetic waves being emitted from each antenna (36) to the combustion chamber (21).
Abstract:
[Problem] To provide an ignition device with which it is possible to improve the air-fuel ratio in an internal combustion engine, without enlarging the size of the device or sharply increasing costs. [Solution] An ignition device comprising: a center conductor that has a surface through which electromagnetic waves propagate; a grounding conductor that surrounds the center conductor; a cylindrical second center conductor that is formed between the center conductor and the grounding conductor, and is connected to the center conductor at the rear end side thereof while insulated from the grounding conductor and separate from the center conductor at the tip end side thereof; and a projection-shaped discharge electrode part that is formed on the tip-end-side surface of the center conductor. The potential of the discharge electrode part is increased using an electromagnetic wave resonance structure formed using the center conductor and the second center conductor, thereby generating discharge between the discharge electrode part and the grounding conductor.