Abstract: An air flow regulator for a railway vehicle is configured so that the rattling of bars can be prevented without using welding, an affixation member, etc. An intake grill is provided at an intake opening for sucking air from an interior of a railway vehicle. The intake grill includes a frame, bars, and a reinforcement capable of deforming the bars. The frame defines an outer edge of the intake opening. The bars are plate-shaped members spanned between portions of the frame to connect the portions to each other. The reinforcement elastically deforms the bars to generate reaction force therein.

Abstract: An engine includes a cylinder liner, a cylinder block, a cylinder head, a seal portion, and a gap member. The seal part is provided to surround the outer circumferential side of the cylinder liner and configured to seal between the cylinder block and the cylinder head. At a position on the inner circumferential side of the seal part, the gap member fills the gap between the cylinder head and the end surface of the inner peripheral side of the cylinder liner, and is made of a material having a lower Young's modulus than the seal part.

Abstract: A precombustion-chamber type gas engine, comprising includes: a check valve disposed in the precombustion-chamber gas supply passage and configured to block a backflow of fuel gas from a precombustion chamber; a supply pressure control valve which is disposed on an upstream side of the check valve in the precombustion-chamber gas supply passage and which is capable of adjusting a pressure of the fuel gas to be supplied to the precombustion chamber; a torch strength information acquisition device configured to obtain torch strength information correlated to strength of a torch from the injection nozzle, on the basis of a pressure in the main chamber and a pressure in the precombustion chamber; a precombustion-chamber gas supply amount calculation device configured to calculate an amount of the fuel gas to be supplied to a precombustion-chamber gas supply amount, on the basis of the torch strength information and correlation information representing a correlation between the torch strength information, a therma

Abstract: An engine includes a plurality of cylinders, a gas chamber, and a heat shielding member. The plurality of cylinders are provided along a crankshaft. The gas chamber extends from a first end portion toward a second end portion in a direction of an axial line of the crankshaft and distributes gas into the plurality of cylinders. The heat shielding member is provided in the gas chamber. The heat shielding member extends from the first end portion toward the second end portion and shields heat radiated from an inner wall surface of the gas chamber.

Abstract: Provided is an air flow regulator for a railway vehicle, which is configured so that the rattling of bars can be prevented without using welding, an affixation member, etc. An intake grill is provided at an intake opening for sucking air from an interior of a railway vehicle. The intake grill comprises a frame, bars (40), and a deformation means. The frame defines an outer edge of the intake opening. The bars (40) are plate-shaped members spanned between portions of the frame to connect the portions to each other. The deformation means elastically deforms the bars (40) to generate reaction force therein.

Abstract: A precombustion-chamber type gas engine, comprising includes: a check valve disposed in the precombustion-chamber gas supply passage and configured to block a backflow of fuel gas from a precombustion chamber; a supply pressure control valve which is disposed on an upstream side of the check valve in the precombustion-chamber gas supply passage and which is capable of adjusting a pressure of the fuel gas to be supplied to the precombustion chamber; a torch strength information acquisition device configured to obtain torch strength information correlated to strength of a torch from the injection nozzle, on the basis of a pressure in the main chamber and a pressure in the precombustion chamber; a precombustion-chamber gas supply amount calculation device configured to calculate an amount of the fuel gas to be supplied to a precombustion-chamber gas supply amount, on the basis of the torch strength information and correlation information representing a correlation between the torch strength information, a therma

Abstract: A gas engine includes: a main combustion chamber; and a precombustion chamber including an ignition plug disposed in a precombustion-chamber upper section and a throat formed in a precombustion-chamber lower section, the throat including a nozzle hole, configured such that mixed gas flows into the throat of the precombustion chamber via the nozzle hole from the main combustion chamber in a compression stroke. The nozzle hole has an opening edge portion on a throat side, the opening edge portion including a curved surface portion formed along a peripheral edge of the opening edge portion. The throat extends linearly along a center axis of the precombustion chamber. A ratio of a length of the throat to an inner diameter of the throat is not smaller than 1.6 and not greater than 2.

Abstract: An engine includes a cylinder liner, a cylinder block, a cylinder head, a seal portion, and a gap member. The seal part is provided to surround the outer circumferential side of the cylinder liner and configured to seal between the cylinder block and the cylinder head. At a position on the inner circumferential side of the seal part, the gap member fills the gap between the cylinder head and the end surface of the inner peripheral side of the cylinder liner, and is made of a material having a lower Young's modulus than the seal part.

Abstract: A knocking control method in a power generation system (1) which includes a gas engine (20) including a plurality of air cylinders (21) and a knocking detection unit (51) configured to detect knocking in each of the air cylinders (21). The knocking control method includes a first control step of delaying an ignition timing for at least one of the air cylinders (21) when the knocking detection unit (51) has detected knocking; a second control step of reducing an amount of gas supplied to at least one of the air cylinders (21) when the knocking has not been eliminated by the first control step; and a third control step of shutting off supply of a gas to any of the air cylinders (21) in which the knocking has occurred.

Abstract: An object is to provide a precombustion-chamber fuel supply device for a precombustion-chamber gas engine having high reliability and low operation cost by reducing outflow of fuel gas to the precombustion chamber in the exhaust stroke and dispersion of the amount of fuel gas supplied to the cylinders, which makes it possible to cut fuel consumption and to achieve stable combustion.

Abstract: An engine includes a plurality of cylinders, a gas chamber, and a heat shielding member. The plurality of cylinders are provided along a crankshaft. The gas chamber extends from a first end portion toward a second end portion in a direction of an axial line of the crankshaft and distributes gas into the plurality of cylinders. The heat shielding member is provided in the gas chamber. The heat shielding member extends from the first end portion toward the second end portion and shields heat radiated from an inner wall surface of the gas chamber.

Abstract: A knocking control method in a power generation system (1) which includes a gas engine (20) including a plurality of air cylinders (21) and a knocking detection unit (51) configured to detect knocking in each of the air cylinders (21). The knocking control method includes a first control step of delaying an ignition timing for at least one of the air cylinders (21) when the knocking detection unit (51) has detected knocking; a second control step of reducing an amount of gas supplied to at least one of the air cylinders (21) when the knocking has not been eliminated by the first control step; and a third control step of shutting off supply of a gas to any of the air cylinders (21) in which the knocking has occurred.

Abstract: In an auxiliary chamber gas supplying device for a gas engine including an auxiliary chamber gas supply path (5, 14, 28, and 29) through which fuel gas is supplied to an auxiliary chamber (4), the auxiliary chamber gas supply path is connected to a fuel gas supply source (24) through a solenoid valve (23), and when the solenoid valve is opened, the fuel gas, in an amount corresponding to an opened period of the solenoid valve, is supplied from the fuel gas supply source to the auxiliary chamber through the auxiliary chamber gas supply path, and the opened period of the solenoid valve is set in such a manner that a predetermined amount of fuel gas is supplied to the auxiliary chamber, and a restriction unit (30) that extends the opened period of the solenoid valve is formed in the auxiliary chamber gas supply path (5, 14, 28, and 29).

Abstract: An object is to provide a precombustion-chamber fuel supply device for a precombustion-chamber gas engine having high reliability and low operation cost by reducing outflow of fuel gas to the precombustion chamber in the exhaust stroke and dispersion of the amount of fuel gas supplied to the cylinders, which makes it possible to cut fuel consumption and to achieve stable combustion.

Abstract: In an auxiliary chamber gas supplying device for a gas engine including an auxiliary chamber gas supply path through which fuel gas is supplied to an auxiliary chamber, the auxiliary chamber gas supply path is connected to a fuel gas supply source through a solenoid valve, and when the solenoid valve is opened, the fuel gas, in an amount corresponding to an opened period of the solenoid valve, is supplied from the fuel gas supply source to the auxiliary chamber through the auxiliary chamber gas supply path, and the opened period of the solenoid valve is set in such a manner that a predetermined amount of fuel gas is supplied to the auxiliary chamber, and a restriction unit that extends the opened period of the solenoid valve is formed in the auxiliary chamber gas supply path.

Abstract: A fuel injection valve can be provided, with which temperature at needle valve seating position can be decreased and carburization of fuel and deposition of the carbide near the needle valve seating position can be prevented resulting in stable normal fuel injection control, and which is applicable to small and middle and also to large engines, particularly gas engines. The fuel injection valve is composed such that distance (A) from a seating face of the nozzle in the nozzle supporting body to a seating position of the needle valve in the nozzle is determined to be smaller than distance (B) from the nozzle seating face in the nozzle supporting body to the lower end of clearance between a nozzle insertion hole of the nozzle supporting body and a fitting part of the nozzle inserted into the nozzle insertion hole, thereby suppressing heat flow to the needle valve seating position.

Abstract: A fuel injection pump equipped with a rotary deflector having an increased lifetime and reduced maintenance cost required to replace the deflector when it is wasted due to cavitation erosion. The deflector comprises a stationary holder and a tip member which is supported rotatably by the stationary holder so that the tip member is rotated by fuel flow that outbursts from the plunger room through the inlet/spill port and impinges against the tip member when fuel injection ends. This evades concentrated impingement at a specific portion of the tip member and prevents the occurrence of cavitation erosion.

Abstract: A fuel injection pump equipped with a rotary deflector, with which lifetime of the deflector is increased and maintenance cost which is required to replace the deflector when it is wasted due to cavitation erosion is decreased. The deflector comprises a stationary holder and a tip member which is supported rotatably by the stationary holder so that the tip member is rotated by fuel flow that outbursts from the plunger room through the inlet/spill port and impinges against the tip member when fuel injection ends, thereby evading concentrated impingement at a specific portion of the tip member and preventing occurrence of cavitation erosion.

Abstract: Fuel injection equipment is provided which realizes characteristics of fuel injection proper for all over the operation range of an engine, can further reduce nitrogen oxide(NOx) emission, and is high in mechanical durability. The fuel injection equipment for an internal combustion engine comprises an injection pump having a plunger part and a fuel passage equipped with a main electromagnetic valve, a fuel supply part for supplying the fuel to the fuel injection pump, a fuel injection pipe for sending the fuel to an injection nozzle part, and a secondary electromagnetic valve attached to an overflow pipe for returning to said fuel supply part the redundant fuel not to be injected from said unit injector, wherein an orifice is attached to said overflow pipe.

Abstract: A fuel injector can reduce the smoke emissions generated during low load and decrease NOx during high load. The fuel injector comprises a first accumulator for accumulating a pressurized fuel, a second accumulator for accumulating a fuel having a higher pressure than the pressure of the fuel in the first accumulator, fuel injection valves to which the fuel from the first and second accumulators is supplied and thereby the fuel injection valves are opened, and the fuel is injected, fuel feeding pipes for feeding the fuel accumulated in the first and second accumulators to the fuel injection valves; a first valve mechanism which is provided at the fuel feeding pipe and which opens and allows the flow of the fuel in the first accumulator to the fuel injection valves, a second valve mechanism which is provided at the fuel feeding pipe and which opens and allows the flow of the fuel in the second accumulator to the fuel injection valves, and a control device for controlling the first and second valve mechanisms.