Abstract: An exhaust gas purification device for an internal combustion engine comprises, an exhaust passage including a catalyst for conveying exhaust gas discharged from the engine to the outside, and a bend formed by bending a portion of the exhaust passage directly upstream of the catalyst, the bend causing exhaust gas discharged from the engine to collide against a corner portion between an inlet end face of the catalyst and such portion of a wall of the exhaust passage that follows the outside of the bend, thereby increasing pressure at the corner portion, compared with the other portion of the inlet end face, and an additive injection valve fitted to the outside of the bend of the exhaust passage to inject an additive in such manner that the injected additive passes just above the corner portion and falls on the inlet end face of the catalytic converter.

Abstract: The exhaust gas purification device of an internal combustion engine of the present invention comprises an exhaust passage for guiding an exhaust gas exhausted from an engine to outside, a catalyst provided in the exhaust passage, an injection path connected on an upstream side of the catalyst in the exhaust passage, an additive injection valve installed in the injection path for supplying an additive to the catalyst through the injection path, and an inflow portion provided in a merging portion where the exhaust passage and the injection path merge for having a part of the exhaust gas flowing in the exhaust passage flow into the injection path.

Abstract: The exhaust gas purification device of an internal combustion engine of the present invention comprises an exhaust passage for guiding an exhaust gas exhausted from an engine to outside, a catalyst provided in the exhaust passage, an injection path connected on an upstream side of the catalyst in the exhaust passage, an additive injection valve installed in the injection path for supplying an additive to the catalyst through the injection path, and an inflow portion provided in a merging portion where the exhaust passage and the injection path merge for having a part of the exhaust gas flowing in the exhaust passage flow into the injection path.

Abstract: The present invention provides an exhaust gas purification device for an internal combustion engine, comprising an exhaust passage including a catalyst for conveying exhaust gas discharged from the engine to the outside, and a bend formed by bending a portion of the exhaust passage directly upstream of the catalyst, the bend causing exhaust gas discharged from the engine to collide against a corner portion between an inlet end face of the catalyst and such portion of a wall of the exhaust passage that follows the outside of the bend, thereby increasing pressure at the corner portion, compared with the other portion of the inlet end face, and an additive injection valve fitted to the outside of the bend of the exhaust passage to inject an additive in such manner that the injected additive passes just above the corner portion and falls on the inlet end face of the catalytic converter.

Abstract: An emission control system, includes: an exhaust pipe portion, adapted to guide exhaust gas from an engine to outside; a catalyst, accommodated in the exhaust pipe portion; an additive injection valve, provided at the exhaust pipe portion located at upstream side of the catalyst, and configured to inject additives to be supplied to the catalyst toward a flow of the exhaust gas in the exhaust pipe portion. The exhaust pipe portion has a flow path section located at upstream side of the catalyst, which intersects an injection flow of the additives injected by the additive injection valve, and the flow path section is made to have substantially the same shape as an injection region of the injection flow which confronts the exhaust gas.

Abstract: In a golf ball comprising an elastic solid core, a mantle layer, and a resin cover having a plurality of dimples, the difference in Shore D hardness between the cover and the mantle layer is at most 10, and the dimples have a total volume of 280–350 mm3. This combination of features provides the golf ball with an excellent balance of rebound, spin and feel, and an outstanding total distance.

Abstract: Disclosed is a golf ball including: a plurality of dimples arranged overall on the spherical surface of the golf ball by assuming the spherical surface of the golf ball as a spherical octahedron and using, as dimple arrangement units, eight spherical triangles constituting the spherical octahedron, on each of which a specific number of the dimples are arranged. In this golf ball, at least the four dimples are arranged on each of three sides of the spherical triangle; there is no great circle with which none of the dimples intersects; and the total number of the dimples is in a range of 380 to 450.

Abstract: In a golf ball comprising an elastic solid core, a mantle layer, and a resin cover having a plurality of dimples, the difference in Shore D hardness between the cover and the mantle layer is at most 10, and the dimples have a total volume of 280-350 mm2. This combination of features provides the golf ball with an excellent balance of rebound, spin and feel, and an outstanding total distance.

Abstract: In a dimpled golf ball, the parameters of dimples are optimized to improve the aerodynamic performance of the ball and thus increase its flight distance. The dimples have a planar shape which is circular, and are of at least three types of mutually differing diameter. At least one of the types of dimples has a cross-sectional shape differing from that of the other types. One of the dimple types may have a cross-sectional shape defined by the union of at least two concave portions of differing slope.

Abstract: A golf ball includes a large number of two types pr more dimples different in diameter and/or depth, which are arranged on the surface of the golf ball; wherein an EAstdev value of the golf ball is in a range of 2 or less, the EAstdev value being expressed by the following equations: EA ⁡ ( α j ) = ∑ i = 1 N ⁢ [ S ⁢   ⁢ i × sin ⁢   ⁢ ( θ i ) ] EAstdev =

Abstract: In a golf ball having a plurality of dimples (12) formed in its surface, each dimple prior to paint coating consists of a major concave surface portion (20) circumscribed by a peripheral convex surface portion (22). The peripheral convex surface portion connects to the major concave surface portion at a point of inflection (30) which is located at a distance of 10-50% of the dimple depth (d) from the edge (26) of the peripheral convex surface portion.

Abstract: Disclosed is a golf ball including: a plurality of dimples arranged overall on the spherical surface of the golf ball by assuming the spherical surface of the golf ball as a spherical octahedron and using, as dimple arrangement units, eight spherical triangles constituting the spherical octahedron, on each of which a specific number of the dimples are arranged. In this golf ball, at least the four dimples are arranged on each of three sides of the spherical triangle; there is no great circle with which none of the dimples intersects; and the total number of the dimples is in a range of 380 to 450.

Abstract: A golf ball includes a large number of two types or more dimples different in diameter and/or depth, which are arranged on the surface of the golf ball; wherein an EAstdev value of the golf ball is in a range of 2 or less, the EAstdev value being expressed by the following equations: 1 EA ⁡ ( α j ) = ∑ i = 1 N ⁢ [ S i × sin ⁢   ⁢ ( θ i ) ] EAstdev = N ⁢ ∑ j = 1 N ⁢ [ EA ⁡ ( α ⁢   ⁢ j ) ] 2 - [ ∑ j = 1 N ⁢ [ EA ⁡ ( α ⁢   ⁢ j ) ] 2 N ⁢   ⁢ ( N - 1 )

Abstract: In a golf ball having a plurality of dimples in its surface, the dimples as a whole are randomly distributed on at least a hemispherical surface. The golf ball has improved aerodynamic isotropy.

Abstract: In a dimpled golf ball, the parameters of dimples are optimized to improve the aerodynamic performance of the ball and thus increase its flight distance. The dimples have a planar shape which is circular, and are of at least three types of mutually differing diameter. At least one of the types of dimples has a cross-sectional shape differing from that of the other types. One of the dimple types may have a cross-sectional shape defined by the union of at least two concave portions of differing slope.

Abstract: A golf ball having a plurality of dimples on its surface, the dimples including dimples which are different in diameter and/or depth, the total number of dimples is 392 to 432, and the golf ball has a percent dimple surface area occupation of 77 to 82%, a percent dimple volume occupation of 0.85 to 1.2%, an average dimple diameter of 2.5 to 4.5 mm (0.098 to 0.177 inches), an average dimple depth of 0.12 to 0.18 mm (0.005 to 0.007 inches), an average dimple V.sub.0 value of 0.4 to 0.6, and a dimple edge angle of 4.0 to 17.0 degrees, where CL is a lift coefficient and CD is a drag coefficient, CL is in the range of 0.140 to 0.190, CD is in the range of 0.21 to 0.255, and CL/CD is in the range of 0.640 to 0.730 when the ball is in flight at a velocity of 65 m/s and a spin rate of 42 rps.

Abstract: A golf ball defines a dimple spherical surface having a diameter of not greater than 42.66 mm and formed with a plurality of protrusions. The ball is unable to pass through a ring gage having an inner diameter of 42.67 mm.

Abstract: There is disclosed a golf ball including a layer made of a shape memory alloy. For example, fine thread of a shape memory alloy is wound around a core so as to provide a shape memory alloy layer between the core and a cover of the golf ball. In this structure, the shape memory alloy layer provides an effect of tightening the core, thus improving the golf ball's resiliency, resulting an increased travel distance. Moreover, since the shape memory alloy layer has a high specific gravity, the moment of inertia of the golf ball increases, so that the spin and roll performances of the golf ball are improved. Furthermore, the shape memory alloy layer having higher strength and hardness functions as a reinforcement layer of the cover, thereby improving cut resistance and impact durability of the cover.

Abstract: A two-piece solid golf ball comprising; a solid core formed of a rubber and a cover formed of an ionomer resin, the solid core has a diameter in the range of 35 to 41 mm and a hardness corresponding to distortion of 2.0 to 4.0 mm under applied load of 100 kg, the cover has a spherical surface, a Shore D hardness in the range of 40 to 70 and a gage in the range of 0.5 to 3 mm, and the spherical surface is formed of a plurality of dimples wherein, the dimples have a depth in the range of 0.08 to 0.15 mm and an average V.sub.O value for all the dimples is 0.5 to 0.9 where V.sub.O is the volume of a dimple space below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom, and a percent dimple volume Vr given by the following equation is in the range of 0.75 to 1.

Abstract: The inner layer of the core has a diameter of 15-25 mm, a weight of 2-14 grams, a specific gravity of 1.2-4, and a hardness of 55-80 JIS C. The outer layer has a specific gravity lower than that of the inner layer by 0.1-3.0. The cover has a radial thickness of 1.5-2.5 mm.A three-piece solid golf ball comprising a two-piece solid core consisting of inner and outer layers and a cover enclosing the core is improved in durability and flying performance through a proper choice of physical parameters of the core inner and outer layers and the cover.