Abstract: A diesel engine system is provided, which includes a piston having a cavity dented downwardly in a crown surface thereof and having a bottom part, a peripheral part dented so as to be convex radially outward, and a lip part formed above the peripheral part and protruding so as to be convex radially inward in a cross-sectional view. An injection controller causes an injector to perform, during operation in a given operating range, a main injection in which injected fuel is directed to the lip part, and an after-injection in which a smaller amount of the fuel than the main injection is injected at a given timing later than the main injection in an expansion stroke. An injection interval period from an end of the main injection to a start of the after-injection is shorter as a temperature parameter related to a progress of a warmup of engine increases.

Abstract: A diesel engine system is provided, which includes a piston having a cavity dented downwardly in a crown surface thereof and having a bottom part, a peripheral part dented so as to be convex radially outward, and a lip part formed above the peripheral part and protruding so as to be convex radially inward in a cross-sectional view. An injection controller causes an injector to perform, during operation in a given operating range, a main injection in which injected fuel is directed to the lip part, and an after-injection in which a smaller amount of the fuel than the main injection is injected at a given timing later than the main injection in an expansion stroke. An injection interval period from an end of the main injection to a start of the after-injection is shorter as a temperature parameter related to a progress of a warmup of engine increases.

Abstract: A method of controlling a fuel injection of a diesel engine for performing a plurality of fuel injections to cause a plurality of combustions inside a cylinder in one combustion cycle, is provided, which includes performing, on compression stroke, the plurality of fuel injections at substantially constant injection intervals while increasing an injection amount as an in-cylinder oxygen concentration decreases, and performing, after the plurality of fuel injections, another fuel injection including a larger injection amount than in the plurality of fuel injections near a top dead center of the compression stroke.

Abstract: A method of controlling a fuel injection of a diesel engine for performing a plurality of fuel injections to cause a plurality of combustions inside a cylinder in one combustion cycle, is provided, which includes acquiring an oxygen concentration inside the cylinder, performing, on compression stroke, the plurality of fuel injections at substantially even injection intervals while increasing the injection intervals as the oxygen concentration decreases, and performing, after the plurality of fuel injections, another fuel injection including a larger injection amount than in the plurality of fuel injections, near a top dead center of the compression stroke.

Abstract: A method of controlling a fuel injection of a diesel engine for performing a plurality of fuel injections to cause a plurality of combustions inside a cylinder in one combustion cycle, is provided, which includes acquiring an oxygen concentration inside the cylinder, performing, on compression stroke, the plurality of fuel injections at substantially even injection intervals while increasing the injection intervals as the oxygen concentration decreases, and performing, after the plurality of fuel injections, another fuel injection including a larger injection amount than in the plurality of fuel injections, near a top dead center of the compression stroke.

Abstract: A method of controlling a fuel injection of a diesel engine for performing a plurality of fuel injections to cause a plurality of combustions inside a cylinder in one combustion cycle, is provided, which includes performing, on compression stroke, the plurality of fuel injections at substantially constant injection intervals while increasing an injection amount as an in-cylinder oxygen concentration decreases, and performing, after the plurality of fuel injections, another fuel injection including a larger injection amount than in the plurality of fuel injections near a top dead center of the compression stroke.

Abstract: A method of controlling a fuel injection of a diesel engine for performing a plurality of fuel injections to cause a plurality of combustions inside a cylinder in one combustion cycle, is provided, which includes performing, on compression stroke, the plurality of fuel injections at substantially constant injection intervals while increasing an injection amount as an atmospheric pressure decreases, and performing, after the plurality of fuel injections, another fuel injection including a larger injection amount than in the plurality of fuel injections.

Abstract: The compression self-ignition engine fuel injection control device is configured to, during one combustion stroke, perform multiple fuel injections to induce multiple combustions in a cylinder. The fuel injection control device comprises a PCM (70) configured to set an interval between a pre-injection and a main injection in the multiple fuel injections, so as to allow valley regions of a curve indicative of a frequency characteristic of a combustion pressure wave generated by the multiple combustions to fall within respective ranges of a plurality of resonant frequency bands of a structure of an engine body of the engine, wherein the PCM is operable to increase a fuel injection amount of the pre-injection more largely as an engine load becomes lower at the same engine speed.

Abstract: There is provided an airbag device with a reduced risk of injury to an occupant in the initial inflation and deployment of an airbag. The airbag has a roll folded portion in the rear side of a vehicle thereof, and a flip folded portion in the front side of the vehicle thereof, and is surrounded by a holding member. The holding member permits inflation and deployment of the airbag only from an opening. The flap has a first restricting portion, a second restricting portion and a third restricting portion joined together in a Y shape, and restricts the inflation and deployment of the airbag. The first restricting portion covers a portion of the roll folded portion of the opening side, and is disposed between the roll folded portion and the holding member. A tip of the second restricting portion is secured to the flip folded portion. The third restricting portion is folded into the flip folded portion.

Abstract: The compression self-ignition engine fuel injection control device is configured to, during one combustion stroke, perform multiple fuel injections to induce multiple combustions in a cylinder. The fuel injection control device comprises a PCM (70) configured to set an interval between a pre-injection and a main injection in the multiple fuel injections, so as to allow valley regions of a curve indicative of a frequency characteristic of a combustion pressure wave generated by the multiple combustions to fall within respective ranges of a plurality of resonant frequency bands of a structure of an engine body of the engine, wherein the PCM is operable to increase a fuel injection amount of the pre-injection more largely as an engine load becomes lower at the same engine speed.

Abstract: There is provided an airbag device with a reduced risk of injury to an occupant in the initial inflation and deployment of an airbag. The airbag has a roll folded portion in the rear side of a vehicle thereof, and a flip folded portion in the front side of the vehicle thereof, and is surrounded by a holding member. The holding member permits inflation and deployment of the airbag only from an opening. The flap has a first restricting portion, a second restricting portion and a third restricting portion joined together in a Y shape, and restricts the inflation and deployment of the airbag. The first restricting portion covers a portion of the roll folded portion of the opening side, and is disposed between the roll folded portion and the holding member. A tip of the second restricting portion is secured to the flip folded portion. The third restricting portion is folded into the flip folded portion.

Abstract: A fuel injection control device of a diesel engine is provided. The device includes an engine body, a fuel injection valve, a turbocharger, a low-pressure EGR system, and a controller for operating the engine body. Within a predetermined high engine-load operating range, the controller controls the fuel injection valve to operate the low-pressure EGR system and perform main and post injections. Within the operating range where the post injection is performed, when the engine load is lower than a predetermined load, an injection amount of the post injection is set to a first injection amount and an injection timing of the post injection is set to a first timing, and when the engine load is higher than the predetermined load, the injection amount of the post injection is set to a second injection amount and the injection timing of the post injection is set to a second timing.

Abstract: An airbag device configured to be disposed in an instrument panel includes an inflator configured to generate gas, and an airbag that includes a gas inlet through which the gas from the inflator is introduced and is inflated and deployed in a bag shape toward a vehicle room side by the gas introduced from the inflator through the gas inlet. The airbag has, in an upper portion thereof, an extra length in a front and rear direction of a vehicle and is folded in a housed state after experiencing a folded state in an approximately planar fashion such that the extra length portion is tucked into the airbag toward the rear of the vehicle.

Abstract: An airbag device configured to be disposed in an instrument panel includes an inflator configured to generate gas, and an airbag that includes a gas inlet through which the gas from the inflator is introduced and is inflated and deployed in a bag shape toward a vehicle room side by the gas introduced from the inflator through the gas inlet. The airbag has, in an upper portion thereof, an extra length in a front and rear direction of a vehicle and is folded in a housed state after experiencing a folded state in an approximately planar fashion such that the extra length portion is tucked into the airbag toward the rear of the vehicle.