Abstract: Embodiments may provide a starting device for a gas internal combustion engine whereby non-combusted gas accumulating in the gas internal combustion engine and an exhaust channel is discharged before ignition startup of the gas internal combustion engine and abnormal combustion of the gas internal combustion engine is prevented so as to improve safety, breakage prevention, durability and reliability.

Abstract: An object of the present invention is to provide a gas leakage checking device and a method for the same, for checking fuel-gas leakage of safety shutoff valves simply and securely by measuring a pressure in a fuel supply pipe.

Abstract: In particular embodiments, a starting device for a gas internal combustion engine whereby non-combusted gas accumulating in the gas internal combustion engine and an exhaust channel is discharged during ignition startup of the gas engine and abnormal combustion is reduced in the occurrence so as to improve safety, breakage prevention, durability and reliability. An exhaust purge device for a gas internal combustion engine 1, which operates using flammable gas as fuel, includes an exhaust channel 16 forming an exhaust channel of the gas internal combustion engine 1, a blast pipe 71 connected to an upstream portion of the exhaust pipe at a first end, an exhaust purge fan 7 connected to a second end of the blast pipe 71 and configured to send ambient air to the exhaust channel 16, and a control device 2 for performing a control to drive the exhaust purge fan 7.

Abstract: An object of the present invention is to provide a starting device for a gas internal combustion engine whereby non-combusted gas accumulating in the gas internal combustion engine and an exhaust channel is discharged during ignition startup of the gas engine and abnormal combustion is prevented so as to improve safety, breakage prevention, durability and reliability. An exhaust purge device for a gas internal combustion engine 1 which operates using flammable gas as fuel includes an exhaust channel 16 forming an exhaust channel of the gas internal combustion engine 1, a blast pipe 71 connected to an upstream portion of the exhaust pipe at one end, an exhaust purge fan 7 connected to another end of the blast pipe 71 and configured to send ambient air to the exhaust channel 16, and a control device 2 for performing a control to drive the exhaust purge fan 7.

Abstract: An object of the present invention is to provide a gas leakage checking device and a method for the same, for checking fuel-gas leakage of safety shutoff valves simply and securely by measuring a pressure in a fuel supply pipe.

Abstract: An object of the present invention is to provide a starting device for a gas internal combustion engine whereby non-combusted gas accumulating in the gas internal combustion engine and an exhaust channel is discharged before ignition startup of the gas internal combustion engine and abnormal combustion of the gas internal combustion engine is prevented so as to improve safety, breakage prevention, durability and reliability.

Abstract: It is an object of the invention to achieve a stable idling revolution speed in a short time and to prevent easily the occurrence of abnormal combustion, misfire, or the like by effectively controlling a gas flow rate adjustment valve even in a case where a fuel gas which tends to fluctuate in fuel gas concentration, as represented by a coal mine gas, is used.

Abstract: Provided is a gas engine having a spark plug provided with a pre-combustion chamber and a check valve, the gas engine, in which the check valve is arranged in the neighborhood of the pre-combustion chamber, being capable of preventing adhesion of a solenoid controlled valve provided at an upstream side of the check valve due to soot accumulation, and dead volume in a fuel inlet passage. In a gas engine in which fuel gas is supplied to the pre-combustion chamber through the fuel gas inlet passage and the fuel gas supplied in the pre-combustion chamber is ignited by spark discharge at the spark plug that is fitted to a mounting hardware piece via a seat surface, a solenoid valve for performing open-close control of the fuel gas is provided, and a first check valve is also provided posterior to a discharge side of the solenoid valve so as to prevent back flow of the combustion gas from the pre-combustion chamber to the solenoid controlled valve.

Abstract: Provided is a check valve structure capable of preventing soot accumulation in a check valve arranged in a pre-combustion chamber (4) due to incomplete combustion of fuel gas and preventing malfunction the check valve (6) for a gas engine having an pre-combustion chamber with a spark plug. An arrangement for supplying fuel gas to the pre-combustion chamber (4) has a multiple bore-cooling holes (11s) disposed around the spark plug (10) for cooling a gasket (10f) formed in a mounting hardware piece (13), the holes having an lateral bore-cooling hole (11a), and a lateral bore-cooling hole (11b) with the gasket (10f) therebetween. Each of the holes further has a multiple bore-cooling holes (11s) parallel to the center axis (10a) of the spark plug.

Abstract: It is an object of the invention to achieve a stable idling revolution speed in a short time and to prevent easily the occurrence of abnormal combustion, misfire, or the like by effectively controlling a gas flow rate adjustment valve even in a case where a fuel gas which tends to fluctuate in fuel gas concentration, as represented by a coal mine gas, is used.

Abstract: There is provided a gas engine fuel gas supply device in which a fuel gas flows along the axial direction on the outer circumferential side of an inlet valve rod, and is supplied into the inlet path in a cylinder head. In the device, in the inner circumferential surface of a sleeve slidably fitted with a projection, the projection being a portion of the inlet valve rod, there is provided a suction hole situated within the region of movement of the projection, and to be opened and closed in response to the movement of the inlet valve rod, and a fuel gas injection hole is formed in the bottom end face of the sleeve communicating with the suction hole. The device is characterized in that the sleeve is disposed so as not to protrude into the inlet path.

Abstract: There is provided a fuel gas supply device for a gas engine in which a fuel gas flows along the axial direction on the outer circumferential side of an inlet valve rod, and is supplied to an inlet path in a cylinder head. The device is characterized in that fuel gas injection holes to be opened and closed with the movement of a projection are provided in the inner circumferential surface of a sleeve into which the projection is slidably fitted, the projection being provided at the inlet valve rod, having a larger outer diameter than the inlet valve rod and having a portion concentric with and in parallel with the inlet valve rod, and in that the fuel gas injection holes are each formed in an ellipse, and the opening upper and lower end region part of the ellipse is situated within the movement region of the projection.

Abstract: Provided is a miller cycle engine in which the thermal efficiency is improved by increasing boost pressure, while the reliability of mechanical strength and thermal load of the engine body is secured by maintaining a maximum in-cylinder pressure. The mirror cycle engine includes an intake valve variable unit (36) for controlling timing to open or close an intake valve (14), a steam.

Abstract: Provided is a check valve structure capable of preventing soot accumulation in a check valve arranged in a pre-combustion chamber (4) due to incomplete combustion of fuel gas and preventing malfunction the check valve (6) for a gas engine having an pre-combust ion chamber with a spark plug. An arrangement for supplying fuel gas to the pre-combustion chamber (4) has a multiple bore-cooling holes (11s) disposed around the spark plug (10) for cooling a gasket (10f) formed, in a mounting hardware piece (13), the holes having an lateral bore-cooling hole (11a), and a lateral bore-cooling hole (11b) with the gasket (10f) therebetween. Each of the holes further has a multiple bore-cooling holes (11s) parallel to the center axis (10a) of the spark plug.

Abstract: Provided is a gas engine having a spark plug provided with a pre-combustion chamber and a check valve, the gas engine, in which the check valve is arranged in the neighborhood of the pre-combustion chamber, being capable of preventing adhesion of a solenoid controlled valve provided at an upstream side of the check valve due to soot accumulation, and dead volume in a fuel inlet passage. In a gas engine in which fuel gas is supplied to the pre-combustion chamber through the fuel gas inlet passage and the fuel gas supplied in the pre-combustion chamber is ignited by spark discharge at the spark plug that is fitted to a mounting hardware piece via a seat surface, a solenoid valve for performing open-close control of the fuel gas is provided, and a first check valve is also provided posterior to a discharge side of the solenoid valve so as to prevent back flow of the combustion gas from the pre-combustion chamber to the solenoid controlled valve.

Abstract: A nursing system enables a bedridden patient or handicapped person to move unattended from his bed or wheelchair to a toilet, bathtub, or other nursing aid, and vice versa, with ease of shifting.

Abstract: A dressing-undressing apparatus helps a nurse to dress and undress a patient or disabled person lying on the bed, by selectively lowering one of mattress elements constituting the bed in response to the movement of one arm of the nurse.