Abstract: A pressure reducing valve includes a partition member. The partition member separates a valve chamber and a pressure regulating chamber from each other and has a communication hole for ensuring communication between the valve chamber and the pressure regulating chamber. A valve body has a body portion, which is located in the valve chamber, and a rod section, which extends from the body portion. The rod section extends to the pressure regulating chamber through the communication hole. A communication line is arranged between a peripheral wall of the communication hole and the rod section. The partition member has an annular groove in the peripheral wall of the communication hole. The groove extends along the full circumference of the communication hole.

Abstract: A pressure-reducing valve includes a valve chamber, a pressure regulating chamber, a partition member, which has a communication hole, and a valve body. The partition member includes the communication hole and a valve seat. The valve body includes a body portion and a rod portion. The valve seat includes a plurality of inclined surfaces, which have different inclination angles with respect to the central axis of the valve body. The circumference wall of the communication hole and the valve seat are connected by a coupling portion. The inclination angle of the valve seat is varied discretely such that the valve seat comes into contact with the valve body at a position more that is further the radially outward from the central axis of the valve body than the coupling portion.

Abstract: A pressure reducing valve includes a partition member. The partition member separates a valve chamber and a pressure regulating chamber from each other and has a communication hole for ensuring communication between the valve chamber and the pressure regulating chamber. A valve body has a body portion, which is located in the valve chamber, and a rod section, which extends from the body portion. The rod section extends to the pressure regulating chamber through the communication hole. A communication line is arranged between a peripheral wall of the communication hole and the rod section. The partition member has an annular groove in the peripheral wall of the communication hole. The groove extends along the full circumference of the communication hole.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine comprises a casing which forms a part of an exhaust passage of the internal combustion engine and houses therein an occlusion-reduction type NOx catalyst and a reducing agent supply device which supplies a reducing agent to an interior of the casing on an upstream side of the NOx catalyst. The reducing agent supply device injects the reducing agent in a flat form in a direction intersecting a center line of the NOx catalyst from a nozzle hole disposed in the casing.

Abstract: A dual-chamber oil pan includes an oil pan provided below an engine block, an oil pan separator that is provided within the oil pan and defines a first chamber communicating with the engine block, and a second chamber provided around the first chamber, and a suction port disposed within the first chamber. The first chamber includes a large-capacity portion including a bottom portion of the oil pan separator, and a small-capacity portion located above and integrally formed with the large-capacity portion.

Abstract: An oil pan (130) comprises an oil pan cover (131) storing oil in an internal space and an oil pan separator (132) positioned in the internal space. The oil pan separator (132) is positioned so as to divide the internal space into a first chamber (30a), which has an oil strainer (41) at its bottom, and a second chamber (30b), which is adjacent to the first chamber (30a). The oil pan separator (132) includes a slope plate (132c) for capturing return oil that flows back from a cylinder block (20a) to an oil pan (130). Part of the captured return oil flows to the second chamber (30b) via a communication hole (132f) that is provided in the slope plate (132c). The remaining captured return oil flows into the first chamber (30a). This ensures that the oil level in the second chamber (30b) is higher than that in the first chamber (30a). Therefore, when a solenoid valve (133) opens at the end of a warm-up operation, the oil in the second chamber (30b) flows into the first chamber (30a).

Abstract: A dual-chamber oil pan includes an oil pan provided below an engine block, an oil pan separator that is provided within the oil pan and defines a first chamber communicating with the engine block, and a second chamber provided around the first chamber, and a suction port disposed within the first chamber. The first chamber includes a large-capacity portion including a bottom portion of the oil pan separator, and a small-capacity portion located above and integrally formed with the large-capacity portion.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine (1) comprises a casing (15) which forms apart of an exhaust passage (14) of the internal combustion engine and houses therein an occlusion-reduction type NOx catalyst (12, 13) and a reducing agent supply device (11) which supplies a reducing agent to an interior of the casing on an upstream side of the NOx catalyst. The reducing agent supply device injects the reducing agent in a flat form in a direction intersecting a center line (CL) of the NOx catalyst from a nozzle hole (11a) disposed in the casing.

Abstract: A method of operating an internal combustion engine having an; electromagnetically driven intake valves for a vehicle. With the method, deviation of an opening operation of the electromagnetically driven intake valve in response to a command signal for opening the intake valve from a predetermined characteristic is detected, and at least one of parameters used for controlling operation of the internal combustion engine is corrected so as to reduce a change in an intake air charging state in which the internal combustion engine is charge with the intake air. A valve closing timing of the intake valve or a valve closing timing of the exhaust valve that cooperates with the intake valve may be used as parameters to be corrected.

Abstract: A control method with variable feedback gain for energization of an electro-magnetically driven intake/exhaust valve of an internal combustion engine increases opening and closing speeds of the intake/exhaust valve driven with electromagnets having small capacity and brings the final speed of the opening and closing action of the valve close to zero. A target moving speed of the armature relative to the electromagnets is determined dependent upon a spacing distance of the armature from the electromagnet; at least a part of energization of the electro-magnetically driven valve is controlled through feedforward control so as to make an actual moving speed of the armature relative to the electromagnets in conformity with the target moving speed while at least the other part of the energization is controlled through feedback control based upon a deviation of the actual moving speed from the target moving speed.

Abstract: A method of operating an internal combustion engine having an; electromagnetically driven intake valves for a vehicle. With the method, deviation of an opening operation of the electromagnetically driven intake valve in response to a command signal for opening the intake valve from a predetermined characteristic is detected, and at least one of parameters used for controlling operation of the internal combustion engine is corrected so as to reduce a change in an intake air charging state in which the internal combustion engine is charge with the intake air. A valve closing timing of the intake valve or a valve closing timing of the exhaust valve that cooperates with the intake valve may be used as parameters to be corrected.

Abstract: A rush adjuster which adjusts a relative position between a valve body and an armature in an axial direction so that a state of zero-rush is formed is arranged between an armature shaft and a valve shaft. At a time of starting an electromagnetic drive valve, a first starting current is applied to either one of an upper coil and a lower coil for generating electromagnetic forces for attracting the armature closer, whichever a distance with respect to the armature is shorter.

Abstract: A control method with variable feedback gain for energization of an electro-magnetically driven intake/exhaust valve of an internal combustion engine increases opening and closing speeds of the intake/exhaust valve driven with electromagnets having small capacity and improves the control performance in bringing the final speed of the opening and closing action of the valve close to zero.

Abstract: When a displacement of an armature of an electromagnetically driven valve fails to reach a predetermined threshold value even after an elapse of a predetermined time from switching opening/closing of the valve, it is determined that step-out has occurred or step-out is about to occur and then the valve opening/closing control is changed. The valve opening/closing control is changed, for example, by interrupting application of current to the valve for attracting the armature released from the other valve.

Abstract: When a displacement of an armature of an electromagnetically driven valve fails to reach a predetermined threshold value even after an elapse of a predetermined time from switching opening/closing of the valve, it is determined that step-out has occurred or step-out is about to occur and then the valve opening/closing control is changed. The valve opening/closing control is changed, for example, by interrupting application of current to the valve for attracting the armature released from the other valve.

Abstract: A rush adjuster which adjusts a relative position between a valve body and an armature in an axial direction so that a state of zero-rush is formed is arranged between an armature shaft and a valve shaft. At a time of starting an electromagnetic drive valve, a first starting current is applied to either one of an upper coil and a lower coil for generating electromagnetic forces for attracting the armature closer, whichever a distance with respect to the armature is shorter.