Abstract: To downsize an electromagnetic wave generation device in a plasma generation device that generates electromagnetic wave plasma by emitting to a target space an electromagnetic wave amplified by means of a solid state amplifying element. The plasma generation device includes the electromagnetic wave generation device that outputs the electromagnetic wave amplified by means of the solid state amplifying element, and an emission antenna for emitting the electromagnetic wave outputted from the electromagnetic wave generation device to the target space. The plasma generation device causes the emission antenna to emit the electromagnetic wave to the target space, thereby generating the electromagnetic wave plasma. The plasma generation device has a characteristic that an output waveform of the electromagnetic wave generation device has a peak during a rise, and is adapted to output the electromagnetic wave to the emission antenna without reducing the peak during the rise of the output waveform.

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.

Abstract: An internal combustion engine has an ignition promotion unit that has a function of promoting ignition of fuel sprays formed by the small quantity injections by supplying the fuel sprays with electric energy. The engine is provided with a control device which has a combustion control unit that carries out processing of causing the fuel injection valve to perform the plurality of times of small quantity injections so that fuel sprays formed by the first-time small quantity injection from among the plurality of times of small quantity injections are connected with one another by the fuel sprays formed by the subsequent small quantity injections from among the plurality of times of small quantity injections.

Abstract: The size of the plasma produced by a plasma-generating device that generates plasma using electromagnetic (EM) radiation is enlarged. The plasma-generating device has an EM-wave-generating device that generates EM radiation, a radiation antenna that emits the EM radiation supplied from the EM-wave-generating device to a target space, and a receiving antenna located near the radiation antenna. The receiving antenna is grounded such that an adjacent portion that is close to the radiation antenna has a higher voltage while the EM radiation is emitted from the radiation antenna. The plasma-generating device generates plasma in the target space near the radiation antenna and the adjacent portion by emitting EM radiation from the radiation antenna.

Abstract: A high frequency switch device includes a branch transmission line corresponding to each output terminal provided with a switching part. In the branch transmission line, the switching part includes a transmission side diode provided in such a manner that a cathode thereof is arranged on a side of an input terminal 41 and an anode thereof is arranged on a side of the output terminal, and a ground side diode provided in such a manner that a cathode thereof is grounded and an anode thereof is electrically connected between the output terminal and the transmission side diode in the branch transmission line. The branch transmission line includes a first capacitor and a second capacitor on the side of the output terminal from the transmission side diode in such a manner that the anode of the ground side diode is connected between the first capacitor and the second capacitor.

Abstract: The present invention is capable of determining that a reaction region is in an abnormal reaction state precisely with high reproducibility, executing proper analysis processing in accordance with the determined a state of the reaction region, and efficiently analyzing a characteristic of the reaction region. The present invention obtains intensity values of first and second wavelength components by measurement of light emitted from the reaction region with a spectrometer. A relative intensity calculator calculates relative intensity of the first wavelength component relative to the second wavelength component from the intensity values of the first and second wavelength components. The apparatus determines whether or not the calculated relative intensity is a value within a predetermined range. An output portion provides notification that the state of the reaction region is a predetermined state when it is determined that the relative intensity is within the predetermined range.

Abstract: In an internal combustion engine that causes a predetermined gas flow in a combustion chamber, discharge plasma generated by a discharge device is caused to effectively absorb energy of an electromagnetic wave emitted from an electromagnetic wave emission device. At a time when a discharge operation and an emission operation are simultaneously performed so as to ignite a fuel air mixture, an emitting position of the electromagnetic wave on an antenna during the emission operation is located downstream of the discharge gap in a direction of the gas flow at the discharge gap so as to face toward the discharge plasma that has been drifted due to the gas flow.

Abstract: In an plasma generation device 30 that generates electromagnetic wave plasma by emitting electromagnetic waves to a combustion chamber 21 of an internal combustion engine 20, combustion is promoted by increasing the amount of gas to be brought into contact with the electromagnetic wave plasma in the combustion chamber 21. An antenna 36 extends along a ceiling surface of the combustion chamber 21. The antenna 36 is provided with an adjustment unit 37 that changes the location of a strong electric field on the antenna 36, which is supplied with the electromagnetic wave. During a generation period of the electromagnetic wave plasma, a control device 10 controls the adjustment unit 37 based on a condition of the combustion chamber 21 and changes the location of the electromagnetic wave plasma.

Abstract: An engine control device 13 that cannot output a control signal to an electromagnetic wave emission device 30 is used to emit electromagnetic wave at an appropriate timing from the device 30 to a combustion chamber 10. A signal processing device 40 is connected to the engine control device 13 that outputs an ignition signal for instructing an ignition device 12 of the engine 20 to ignite fuel air mixture in the combustion chamber 10 of the engine 20. The signal processing device 40, upon receiving the ignition signal, outputs to the electromagnetic wave emission device 30 an electromagnetic wave drive signal that determines based on the ignition signal an emission period, which is a period for the electromagnetic wave emission device 30 to emit an electromagnetic wave to the combustion chamber 10, so that an ignition operation is performed during the emission period of the electromagnetic wave.

Abstract: To suppress the reflection of an electromagnetic wave from a load in a plasma generation device 30 that generates electromagnetic wave plasma by emitting the electromagnetic wave to a combustion chamber 10 of an engine 20. The plasma generation device 30 includes an electromagnetic wave oscillator 33 that oscillates the electromagnetic wave, an antenna 15a for emitting the electromagnetic wave oscillated by the electromagnetic wave oscillator to the combustion chamber 10 of the engine 20, and a stub adjustment unit 52, 53. The stub 51 is provided on a transmission line 60 for electromagnetic wave from the electromagnetic wave oscillator 33 to the antenna 15a. While the engine 20 is operating, the stub adjustment unit 52, 53 adjusts a short circuit location on the stub 51 based on the intensity of a reflected wave of the electromagnetic wave reflected from the antenna 15a.

Abstract: In a plasma generation device that generates electromagnetic wave plasma by emitting electromagnetic waves in a target space, the electromagnetic wave plasma is generated in a plurality of locations with a simple configuration and relatively low electromagnetic wave energy. The plasma generation device is provided with an antenna that emits electromagnetic waves supplied from an electromagnetic wave generator in the target space, a discharger that forcibly discharges free electrons from gas molecules in the target space, and an electric field concentration member that concentrates electric field of the electromagnetic wave emitted from the antenna. The electric field concentration member is arranged in non-contact relationship with the antenna. The plasma generation device causes the discharger to discharge free electrons and the antenna to emit electromagnetic waves, thereby generating electromagnetic wave plasma in the vicinity of the antenna and in the vicinity of the electric field concentration member.

Abstract: In an internal combustion engine 20 that promotes combustion of fuel injected from an injector 50 to a combustion chamber 21 by way of electromagnetic wave plasma, a plurality of pieces of the electromagnetic wave plasma are generated respectively for a plurality of jet flows inlected from the injector 50. A plurality of antennae 36 are provided respectively for a plurality of injection holes of the injector 50. Each antenna 36 is disposed on an exposed surface 46a of a piston 46 exposed to the combustion chamber 21 at a location corresponding to each injection hole 55. While the injector 50 injects fuel, each antenna 36 emits the electromagnetic wave to the combustion chamber 21, thereby generating the electromagnetic wave, plasma.

Abstract: To effectively improve flame propagation speed utilizing active species in an internal combustion engine 10 that promotes combustion utilizing active species. The internal combustion engine 10 is provided with an internal combustion engine main body 11 that combusts fuel air mixture in a combustion chamber 20 and an active species generation unit 13 that generates active species in a region which a flame surface has not yet reached during flame propagation in the combustion chamber 20. In a region which the flame will eventually pass through, the active species generation unit 13 generates the active species while the flame surface has not yet reached the region.

Abstract: In a compression ignition internal combustion engine 20 that generates electromagnetic wave plasma by emitting electromagnetic waves to a combustion chamber 21 during a period of a preceding injection, a control device 10 for internal combustion engine controls a fuel injection device 24 to perform, before a main injection, a preceding injection less in injection quantity than the main injection, while controlling a plasma generation device 30 to generate electromagnetic plasma by emitting electromagnetic waves to the combustion chamber 21 during the period of the preceding injection. The control device 10 controls a condition of heat production due to combustion of fuel from the main injection by controlling the amount of energy of the electromagnetic waves emitted to the combustion chamber 21 during the period of the preceding injection according to the operating condition of the internal combustion engine main body 22.

Abstract: In a plasma device 30 that emits an electromagnetic wave to a combustion chamber 10 of an engine 20 so as to generate electromagnetic wave plasma thereby igniting mixture gas, fuel efficiency for lean burn mixture combustion of an engine 20 is improved. During a flame propagation after the mixture gas is ignited in the combustion chamber, the electromagnetic wave is emitted to the combustion chamber 10 so that electrons in a propagating flame resonate with the electromagnetic wave. The resonance between the electrons in the propagating flame and the electromagnetic wave increases flame propagation speed.

Abstract: To provide a control device for an internal combustion engine that can optimally control a plasma ignition operation independent of fuel type. In a control device 30 of an internal combustion engine 20, which controls plasma ignition operation for causing volume ignition of air fuel mixture by plasma in a combustion chamber 10, a fuel type detection part 40 detects a type of fuel to be supplied to the combustion chamber 10. According to the detected fuel type, a state of plasma or a state of air fuel mixture in the combustion chamber 10 is controlled.

Abstract: Provided is a spectroscope that can be manufactured easily, can be reduced in size, and can provide high wavelength resolution of a specific spectral band. Specifically, provided is a spectroscope with a diffraction grating 331 that deflects and separates incident light in different directions depending on to an element of the incident light, at least one optical element 332a, diffusing a light that has passed through this diffraction grating 331 and has entered the optical element 332a, a line sensor 333, which receives the light that has passed through the optical element 332a, thereby only light that has a specific deflection angle within a specific range of wavelengths from among all the light that entered said optical element 332a is selectively expanded and received.

Abstract: A plasma equipment comprising a microwave oscillator for generating a predetermined microwave band, a microwave resonant cavity for allowing the predetermined microwave band to resonate, and microwave radiation means for radiating the microwave into the microwave resonant cavity, wherein the microwave radiation means is a microwave radiation antenna having the shape and the size so as to form a strong electric field of the microwave in a plasma generation field formed by the microwave.

Abstract: A multiple discharge plasma apparatus is provided with a plurality of discharge devices, each with an electrode exposed to the combustion chamber and installed in at least one of members constituting the combustion chamber; an antenna installed in at least one of the members constituting the combustion chamber so as to radiate electromagnetic waves to the combustion chamber; an electromagnetic wave transmission line installed in at least one of the members constituting the combustion chamber, with one end connected to the antenna and the other end covered with an insulator or dielectric and extending to a portion, of at least one of the members constituting the combustion chamber, distant from the combustion chamber; and an electromagnetic wave generator for feeding electromagnetic waves into the electromagnetic wave transmission line; wherein the multiple discharge plasma apparatus is configured such that discharge is generated by the electrodes of a plurality of discharge devices and the electromagnetic wav

Abstract: There is provided a plasma formation region control apparatus, with which a large-scale plasma can be obtained under a high pressure with ease and at low cost. The plasma formation region control apparatus comprises a microwave oscillator, an antenna connected to the microwave oscillator, and controller for controlling the position of each of the microwave oscillator and the antenna. The controller positions the antenna towards a plasma formation region in accordance with a specification for a plasma region for respective points in time t; establishes a driving sequence for the microwave oscillator based on the temperature state of the specified plasma; and drives the microwave oscillator according to the driving sequence.