摘要:
A two-piece oil ring, for use in an internal combustion engine, with the oil ring being made from a martensitic stainless steel material having high consisting essentially of more than 0.8 wt % but less than 0.95 wt % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, from 15.0 wt % to 20.0 wt % of Cr and a balance substantially Fe and incidental impurities. The oil ring has a hardness ranging from HV300 to HV450 and a substantially H- or X-shaped cross-section. A web portion interconnecting left and right halves of the H- or X-shaped cross-section has a thickness not greater than 0.3 in terms of the ratio of the total thickness of the ring. Oil passage holes are formed in the web portion. A nitrided layer is formed on the sliding surface thereof which makes a sliding contact with the inner surface of a cylinder of the engine. The material may further contain suitable amounts of at least one of Mo, W, V, Nb, Ni and Co. The oil ring is produced by bending a wire of the martensitic stainless steel material by a process including warm roll dies plastic working and a subsequent cold roll dies plastic working through which a modified cross-section is imparted to the material, continuous annealing, punching for forming oil passage holes by punching, and continuous hardening and tempering.
摘要:
A section steel wire for an oil ring for use in an internal combustion engine, consisting essentially of, by weight, 0.6 to 1.5% carbon, not more than 1.5% Si, not more than 1.5% Mn, more than 20% and not more than 25% Cr, and optionally containing at least one group selected from three groups consisting of a group of at least one element of Mo and W in total amount of not more than 3% of "Mo+W/2", another group of at least one element of V and Nb in total amount of not more than 3% of "V+Nb/2" and still another group of at least one element selected from not more than 12% Co, not more than 5% Ni and not more than 5% Cu, and balance of Fe and unavoidable impurities. The section steel wire has a Vickers hardness of HV 300 to HV 450 and has a substantially H-or X-shaped cross-section. A thickness ratio of the thickness of the web portion bridging the flange portions to the total thickness (T) of the flange portions is not greater than 0.3.
摘要翻译:一种用于内燃机的油环的截面钢丝,主要由重量比为0.6-1.5%的碳,不超过1.5%的Si,不超过1.5%的Mn,大于20%,不超过20% 并且任选地含有至少一种选自由Mo和W中的至少一种元素组成的组中的至少一种,其总量不超过“Mo + W / 2”的3%的另一组 V和Nb的至少一种元素的总量不超过“V + Nb / 2”的3%,另外一组选自不大于12%Co,不超过5%Ni的至少一种元素,以及 不超过5%的Cu,余量为Fe和不可避免的杂质。 截面钢丝具有HV 300至HV 450的维氏硬度,并且具有基本上H形或X形的横截面。 将凸缘部分桥接的腹板部分的厚度与凸缘部分的总厚度(T)的厚度比不大于0.3。
摘要:
There is provided an electroconductive resin composition comprising: (a) a polyamide resin, (b) a polyphenylene ether resin, and (c) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance to form the fiber. The composition has a high electroconductivity while upholding a high moldability, mechanical property and durability in the polyamide-polyphenylene ether resin.
摘要:
There is disclosed a conductive resin composition, comprising: (a) a resin component, and (b) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance to form the fiber. The resin composition has high conductivity while maintaining the original physical properties of the resin.
摘要:
There is provided an electroconductive polyamide resin composition comprising: (a) a polyamide resin component obtained from a dicarboxylic acid component comprising oxalic acid and a diamine component comprising a diamine having 4 to 12 carbon atoms, and (b) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance to form the fiber.
摘要:
A wireless camera fixture adapted to mount on a track, such as a track normally used for overhead lighting fixtures, is described. Embodiments include the use of IEEE 802.11 wireless protocol, the use of a standard track-mount power supply; the use of a two-axis tilt and pan mechanical mount; hardware to permit horizon correction; modifications to a camera enclosure to support an antenna inside the enclosure and access to camera controls; use of multiple antennas; use of a cover plate at the front of the enclosure; use of visible light or infrared light LEDs on the cover plate; configuration to use dual-circuit tracks; use of separate circuits in the track to power the visible light and infrared light LEDs separately. A method of manufacturing the fixture is described.
摘要:
The present invention provides a cylindrical linear motor that can develop great thrust and reduce thrust pulsations. The cylindrical linear motor includes a stator 1 and a movable element 10 disposed via a clearance with respect to the stator 1 and movable rectilinearly with respect to the stator 1. The stator 1 includes a stator core 3 having stator salient poles 3b, and a three-phase stator coil winding 2 inserted within the slots formed in the stator core 3. The movable element 10 has a plurality of permanent magnets 11 fixed to a movable element core 12. The cylindrical linear motor is constructed so that when the stator salient poles 3b are pitched at τs and the permanent magnets 11 are pitched at τp, a relationship of 3/4
摘要:
Described are fuel parts comprising a crystalline polyamide resin having a terminal amino group concentration>a terminal carboxyl group concentration and excellent in fuel resistance at their weld portion, which fuel parts are suited for use as various parts to be attached to fuel tanks of automobiles and the like, and a process for producing the fuel parts.
摘要:
A charging method of an electrostatic image developer which makes it possible to electrically charge an insulating one-component developer or a two-component developer consisting of a toner and a carrier to a desired charged state and which comprises introducing the developer into a charging space between a pair of sheet-like charging members opposing each other in which space an alternating field is formed, and oscillating the developer by means of the alternating field for charging it. A developing method of a non-contact or contact system which develops the electrostatic image by use of the developer charged electrically by the above-mentioned charging method.
摘要:
An intake system of an internal combustion engine including a power cylinder having an intake valve and a fuel injection nozzle, comprising: a throttle chamber upstream open to the atmosphere; primary and secondary throttle valves provided in parallel with each other in the throttle chamber; primary and secondary air passageways leading from the throttle chamber past the primary and secondary throttle valves, respectively, and conjoined together upstream of the intake valve, the secondary passageway being larger in cross sectional area than the primary air passageway and having a reservoir chamber portion larger in cross sectional area than the remaining portion of the secondary passageway; and air heating means provided in the primary air intake pipe and operative to preheat the air to be passed through the primary air intake pipe.