Abstract: A fuel injection control system may include a variable exhaust valve mechanism configured to primarily open an exhaust valve directly before an intake stroke in which an intake valve is opened and to secondarily open the exhaust valve during the intake stroke such that valve overlap occurs; an exhaust injector provided at an exhaust side to inject fuel; and a controller for controlling the exhaust injector such that fuel is injected through the exhaust injector before the exhaust valve is opened secondarily before or during the intake stroke.

Abstract: A piston combustion chamber structure of an engine includes two or more independent combustion chambers separated from each other and dented on an upper portion of a piston head in axial and circumferential directions. Each of the two or more independent combustion chambers comprises an outer wall and a bottom surface. Independent combustion chambers adjacent to each other among the two or more independent combustion chambers are partitioned by a partition wall. The partition wall has a slant surface such that a squish flowing in the circumferential direction can be generated.

Abstract: A fuel injection control system may include a variable exhaust valve mechanism configured to primarily open an exhaust valve directly before an intake stroke in which an intake valve is opened and to secondarily open the exhaust valve during the intake stroke such that valve overlap occurs; an exhaust injector provided at an exhaust side to inject fuel; and a controller for controlling the exhaust injector such that fuel is injected through the exhaust injector before the exhaust valve is opened secondarily before or during the intake stroke.

Abstract: A method for controlling combustion in a diesel engine includes: premixing ambient air, EGR gas and vaporized diesel fuel in a combustion chamber during an intake stroke of each cylinder of the diesel engine; and sequentially performing, by an injector, pilot injection, main injection, and post injection during a compression stroke occurs after the intake stroke.

Abstract: A piston of an engine has a bowl including: a top end that is a surface inclined toward a center of the piston from an edge portion of a top of the piston; a central projection protruding upward at a center of the piston; a recession extending outwardly from the central projection and inclined downward beneath the top end; and a neck connecting the recession and the top end to each other wherein a minimum diameter of the neck is within 62˜65% of a cylinder bore diameter, a maximum diameter of the recession is within 102˜105% of the minimum diameter of the neck, a maximum depth from the top of the piston to a deepest portion of the recession is within 10˜20% of the cylinder bore diameter, and a center of a radius of curvature of the neck is disposed within 2˜10% of the cylinder bore diameter.

Abstract: A vehicle seat assembly including at least a component of the seat assembled made of closed-cell foam and having an integral exterior surface. The component may include a backrest, headrest, seat cushion or a component thereof such as an armrest. A method of forming a seat assembly including a first seat component and a second seat component wherein at least one of the first and the second components are made of closed-cell foam.

Abstract: A rotation test stand for a test specimen includes a load device for generating a load for the test specimen, a test specimen accommodation for accommodating the test specimen and for transmitting the load to the test specimen as well as a measuring device for measuring a measured variable acting on the test specimen. Provision is furthermore made at a suitable location for a vibration damping device for damping vibrations, which arise in the test stand. The vibration amplitudes are to be reduced, in particular, by a torsional vibration damper or a linear vibration damper. The vibration damper can be disposed in the drive train or at the measuring device.

Abstract: A rotation test stand for a test specimen includes a load device for generating a load for the test specimen, a test specimen accommodation for accommodating the test specimen and for transmitting the load to the test specimen as well as a measuring device for measuring a measured variable acting on the test specimen. Provision is furthermore made at a suitable location for a vibration damping device for damping vibrations, which arise in the test stand. The vibration amplitudes are to be reduced, in particular, by a torsional vibration damper or a linear vibration damper. The vibration damper can be disposed in the drive train or at the measuring device.

Abstract: A vehicle seat assembly including at least a component of the seat assembled made of closed-cell foam and having an integral exterior surface. The component may include a backrest, headrest, seat cushion or a component thereof such as an armrest. A method of forming a seat assembly including a first seat component and a second seat component wherein at least one of the first and the second components are made of closed-cell foam.

Abstract: An injector for a diesel engine that controls an injecting angle of a fuel in accordance with a driving type of the diesel engine. A nozzle body defines first and second injection holes for injecting a fuel into a combustion chamber and first and second needles selectively open and close the first and second injection holes by moving upwardly and downwardly along a guide portion. An ECU controls ignition timing and the opening and closing timings of the first and second ignition holes via the needles.

Abstract: An injector for a diesel engine that controls an injecting angle of a fuel in accordance with a driving type of the diesel engine. A nozzle body defines first and second injection holes for injecting a fuel into a combustion chamber and first and second needles selectively open and close the first and second injection holes by moving upwardly and downwardly along a guide portion. An ECU controls ignition timing and the opening and closing timings of the first and second ignition holes via the needles.