Abstract: An electrolysis method of preventing the voltage of an electrolytic bath from rising over time without halting electrolysis and an electrolysis device for executing the method are provided such that: in operation of a two-compartment electrolytic bath, which has a membrane partitioning an anode compartment from a cathode compartment and in which a sulfide ion-containing white liquor for use in a pulp production process is fed into the anode compartment while direct current is supplied to the electrolytic bath to produce polysulfide in the anode compartment through electrolysis, and a sulfide ion-containing white liquor for use in a pulp production process that contains at least one of a scale cleaning agent and a scale inhibitor is fed to the anode compartment.

Abstract: A fuel injection device that injects a liquefied gas fuel from an injection port to a combustion chamber of the internal combustion engine includes a passage forming member configured to define a fuel passage through which the liquefied gas fuel flows to the injection port, a temperature regulating unit configured to adjust a temperature of the liquefied gas fuel flowing through the fuel passage according to an operation state of the internal combustion engine, and a pressure regulating unit configured to adjust a pressure of the liquefied gas fuel flowing through the fuel passage according to the operation state of the internal combustion engine.

Abstract: The present invention provides a set of ozone water manufacturing device which can greatly reduce an unpleasant smell of ozone gas when ozone water is used for sterilizing hands and feet, and can save power consumption of a pump which operates for preventing stagnation of a water stream in an electrolytic bath. The ozone water manufacturing device includes an electrolytic bath and a mixer which atomizes air bubbles of the ozone gas in the ozone water flowing out of the electrolytic bath. Each of the electrode assemblies in an electrode unit within the electrolytic bath is inclined at the predetermined same angle in a vertical direction. The mixer includes a mixing case bottom and a mixing case main body. A vortex flow generating plate generates a violent water stream from the water stream within the mixing case main body.

Abstract: At least an embodiment of the invention enables data which can be effectively utilized in maintenance work to be acquired from a work-machine main body, in a portable electric work machine capable of having a battery pack attached thereto and detached therefrom. This portable electric work machine may be provided with: a battery pack provided with a battery and a memory; and a work-machine main body. The work-machine main body is provided with: a work unit for performing prescribed work; a work-machine controller; and a memory. When the battery pack is attached to the work-machine main body, information corresponding to information related to the purchase date or sale date and stored in memory is saved in memory.

Abstract: An embodiment may inhibit, in a simpler manner, the theft of a battery pack capable of being attached to and detached from a portable electric work machine. An electric brush cutter is provided with: a battery pack capable of assuming either a sleep state or an active state; and a work-machine main body. The battery pack is provided with a memory having, stored therein, information indicating the state of a battery. The brush cutting work-machine main body is provided with: a work unit and a work-machine controller for controlling the work unit. The work-machine controller prohibits operation of the work unit when the information stored in the memory of the battery pack indicates the sleep state, and enables operation of the work unit when the information stored in the memory of the battery pack indicates the active state.

Abstract: A partition plate includes a main body and a plurality of protrusions. The main body is configured to be disposed in an intake passage of an engine partition the intake passage. The protrusions are provided at an end of the main body. The end is located toward a combustion chamber. Each protrusion is inclined relative to a width direction of the main body from an apex toward a base. The apex protrudes so as to be the closest toward the combustion chamber, and the base is the farthest from the combustion chamber.

Abstract: A partition plate is configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage. The first intake passage is openable and closable by a valve. A shape of a first cross section orthogonal to an extending direction of the intake pipe is set on the basis of a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween.

Abstract: An electrolysis method of preventing the voltage of an electrolytic bath from rising over time without halting electrolysis and an electrolysis device for executing the method are provided such that: in operation of a two-compartment electrolytic bath, which has a membrane partitioning an anode compartment from a cathode compartment and in which a sulfide ion-containing white liquor for use in a pulp production process is fed into the anode compartment while direct current is supplied to the electrolytic bath to produce polysulfide in the anode compartment through electrolysis, and a sulfide ion-containing white liquor for use in a pulp production process that contains at least one of a scale cleaning agent and a scale inhibitor is fed to the anode compartment.

Abstract: A fuel supply device supplying a fuel stored in a fuel tank to an engine includes a low-pressure pump configured to feed the fuel, a high-pressure pump configured to compress the fuel discharged from the low-pressure pump and to feed to the engine, a first low-pressure passage member configured to define a first fuel passage from the low-pressure pump to the high-pressure pump, and a second low-pressure passage member configured to define a second fuel passage branched from the first fuel passage at a low-pressure junction portion and joining the first fuel passage at a low-pressure confluence portion, wherein the first fuel passage and the second fuel passage are different in at least one of (i) temperatures of the fuels that flow through the fuel passages and (ii) passage lengths of the fuel passages from the low-pressure junction portion to the low-pressure confluence portion.

Abstract: An electrolysis method of preventing the voltage of an electrolytic bath from rising over time without halting electrolysis and an electrolysis device for executing the method are provided such that: in operation of a two-compartment electrolytic bath, which has a membrane partitioning an anode compartment from a cathode compartment and in which a sulfide ion-containing white liquor for use in a pulp production process is fed into the anode compartment while direct current is supplied to the electrolytic bath to produce polysulfide in the anode compartment through electrolysis, and a sulfide ion-containing white liquor for use in a pulp production process that contains at least one of a scale cleaning agent and a scale inhibitor is fed to the anode compartment.

Abstract: Provided is an external structure configured to be attached to or detached from an electronic device having a concave portion formed on a surface of a housing, and a connection connector provided in a position of the concave portion receding from the surface of the housing, the concave portion having a cross-sectional shape enabling locking of the external structure, the external structure including a first fitting unit configured to be fitted to the connection connector.

Abstract: A waveguide 10 includes first core portions (cores 210) extending in a first direction (an x-axis direction), at least one second core portion (dummy cores 220) which is provided parallel to the first core portions (the cores 210) and extends in the first direction (the x-axis direction), and clad portions 230 that separate the first core portions (the cores 210) and the second core portions (the dummy cores 220), and the second core portion (the dummy core 220) has first regions (wave guide regions 240) having a substantially constant cross-sectional area and second regions (first light-shielding regions 252 and second light-shielding regions 254) which are continuously provided from at least one end of the first region (the wave guide region 240) and has a cross-sectional area that decreases as the second region runs farther away from the first region (the wave guide region 240). Therefore, the transmission of optical signals in the second core portions (the dummy cores) is prevented.

Abstract: A Laval shape is formed between the nozzle seat surface and needle tip portion. An injection hole also has the Laval shape. When the needle lift amount is small, a fuel flow velocity reaches an acoustic velocity in valve-opening portion. The fuel flow velocity further accelerated to a supersonic velocity at the Laval shape. When the needle lift amount is large, the fuel flows into the injection hole without a velocity decrease. Thus, the fuel flow velocity reaches the supersonic velocity at the Laval shape.

Abstract: A fuel supply system has a pressure chamber which communicates with a fuel gallery. The pressure chamber receives the fuel from the feed pump or the returned fuel from the fuel gallery. The fuel in the pressure chamber receives heat energy from the engine E so that the fuel is brought into gas-liquid phase. A volume change of the fuel in liquid phase in the fuel gallery can be compensated by a volume change of the fuel in gas phase or gas-liquid phase in the pressure chamber. Thus, the pressure pulsation in the fuel gallery is absorbed in the pressure chamber.

Abstract: A fuel supply device includes a leaked fuel collection unit and a check valve. When fuel passes through a first seal member to leak out from a cam chamber into an inter-seal space, the leaked fuel collection unit sucks in this fuel to extract the fuel from the inter-seal space, then pressurizes and returns the fuel to a fuel tank. The check valve prevents the fuel from flowing in reverse from the fuel tank to the inter-seal space. Accordingly, regardless of the pressure in the fuel tank and the pressure in the inter-seal space, fuel that leaks into the inter-seal space may be actively returned to the fuel tank. Further, the check valve prevents pressure in the fuel tank from acting on seal members. Accordingly, fuel that leaks into the inter-seal space may be collected into the fuel tank.

Abstract: A fuel injection nozzle includes: a nozzle body having a plurality of injection holes; and a needle accommodated in the nozzle body to inject a DME fuel containing dimethyl ether as a main component. The nozzle body has a seat part to which the needle seated or from which the needle separated, and a tip end chamber arranged downstream of the seat part in a flow of the DME fuel to communicate with the plurality of injection holes. The DME fuel in the tip end chamber is heated with combustion heat in a combustion chamber of an internal combustion engine to have a supercritical state.

Abstract: A fuel supply device includes a leaked fuel collection unit and a check valve. When fuel passes through a first seal member to leak out from a cam chamber into an inter-seal space, the leaked fuel collection unit sucks in this fuel to extract the fuel from the inter-seal space, then pressurizes and returns the fuel to a fuel tank. The check valve prevents the fuel from flowing in reverse from the fuel tank to the inter-seal space. Accordingly, regardless of the pressure in the fuel tank and the pressure in the inter-seal space, fuel that leaks into the inter-seal space may be actively returned to the fuel tank. Further, the check valve prevents pressure in the fuel tank from acting on seal members. Accordingly, fuel that leaks into the inter-seal space may be collected into the fuel tank.

Abstract: A Laval shape is formed between the nozzle seat surface and needle tip portion. An injection hole also has the Laval shape. When the needle lift amount is small, a fuel flow velocity reaches an acoustic velocity in valve-opening portion. The fuel flow velocity further accelerated to a supersonic velocity at the Laval shape. When the needle lift amount is large, the fuel flows into the injection hole without a velocity decrease. Thus, the fuel flow velocity reaches the supersonic velocity at the Laval shape.

Abstract: A fuel supply system has a pressure chamber which communicates with a fuel gallery. The pressure chamber receives the fuel from the feed pump or the returned fuel from the fuel gallery. The fuel in the pressure chamber receives heat energy from the engine E so that the fuel is brought into gas-liquid phase. A volume change of the fuel in liquid phase in the fuel gallery can be compensated by a volume change of the fuel in gas phase or gas-liquid phase in the pressure chamber. Thus, the pressure pulsation in the fuel gallery is absorbed in the pressure chamber.

Abstract: A liquefied gas fuel is supplied to a fuel gallery of a high-pressure pump through a feed pipe. A fuel injection apparatus includes a passage expansion pipe of which passage area is greater than that of the fuel gallery. The passage expansion pipe is arranged between the feed pipe and the fuel gallery. When the fuel is supplied to the fuel gallery during a suction stroke of a plunger, the passage expansion pipe functions as an accumulator accumulating the fuel therein. The replenishing fuel from the passage expansion pipe is added to the fuel supplied from the feed pump. A pressure drop in the fuel gallery becomes small, so that the pressure pulsation in the fuel gallery is reduced.