摘要:
A tensioner, in which an inner body and an outer body, which can deal with tensioner mounting forms and tension imparting functions required from various engines can be assembled and its efficient production and reliable assembling without wobbling and clattering can be performed. A body 22 of a tensioner 21 is composed of plastic outer and inner bodies 23 and 24 formed by different members respectively. The outer body 23 is provided with a tensioner mounting means and an inner body fitting hole 23a, the inner body is provided with a plunger accommodating hole 24a, a plunger 26 biased by a compression spring 27 is slidably fitted into the plunger accommodating hole 24a, a bottom portion of the plunger accommodating hole 24a is provided with a check valve 31, and at least the inner body 24, the check valve 31, the compression spring 27 and the plunger 26 form an inner body side unit 33, which imparts proper tension. Further, the inner body 24, which forms the inner body side unit 33 is adapted to be fixed into the inner body fitting hole 23a of the outer body 23 by heat welding.
摘要:
In a hydraulic tensioner a cylindrical plunger slidably protrudes from a plunger-accommodating hole in a tensioner housing. A check valve unit allows oil to flow under pressure into a high pressure chamber formed by the plunger and the housing, but blocks reverse flow. The plunger is biased in the protruding direction by a spring located in the high pressure chamber. The plunger has an annular groove in its outer circumferential surface, and a C-shaped ring disposed in the groove is resiliently biased radially outwardly against the inner circumferential wall of the plunger-accommodating hole. A radial clearances is provided between the ring and the bottom of the groove, and the ring also fits into the groove with an axial clearance.
摘要:
A check valve unit in a hydraulic tensioner comprises a check ball which controls the flow of the oil to and from a high pressure oil chamber formed by a plunger and the plunger-receiving hole of the tensioner housing, a ball guide in which the check ball moves, a retainer which seals the check ball in the ball guide, and a ball seat which blocks reverse flow of oil by seating the check ball. Grooves, which ventilate air from the high pressure oil chamber to an oil supply passage, are formed on an outer circumferential surface of the ball guide and a bottom surface of the ball seat.
摘要:
The present invention provides a sol of spinous inorganic oxide particles not containing coarse particles, in which particles having extremely homogeneous particles are dispersed in a solvent. An acidic silicic acid is added to a dispersion liquid of core particles to grow core particles, and then again the acidic silicic acid is added at the addition rate 1.2 to 1.8 higher than that in the previous step to prepare a sol of spinous inorganic oxide particles. Then the sol is subjected to centrifugation to remove coarse particles having the diameter of 800 nm or more, thus spinous inorganic oxide particles having peculiar form such as a spinous one being obtained.
摘要:
A disk drive correctly recognizes newly written data when a plurality of readable data exist on the same sector of the same track, by comparing AGC values of each of the readable data, comparing error rates generated by Viterbi decoding, or both. An offset value determining means determines whether an offset value when the data is read has exceeded a predetermined value when the data is read. An offset control means controls the head, on the basis of the determination result of the offset value determining means, to conduct the offset operation on the opposite side of the track when the data is read the first time, and a selecting means selects the new data recorded in the sector by comparing the results obtained for both sets of data.
摘要:
A cache controller prefetches instruction code from a memory and stores the instruction code in a cache. The cache controller comprises an address output section for, when an instruction fetch address from a processor is matched with a comparative address, outputting a prefetch address corresponding to the comparative address, and a load control section for loading the instruction code in the cache from the outputted prefetch address of the memory.
摘要:
There is provided a storage apparatus, a stored data processing apparatus, and a stored data processing program capable of enhancing error recovery capability while suppressing an increase in response time for the higher-level device.A storage apparatus comprises: a management information storage section that stores, for each second block, management information relating to a storage medium and including information indicating whether a third block corresponding to the second block is valid or invalid; a calculation section that performs calculation for each bit position using data of all first blocks in an update target in the case where the management information stored in the management information storage section indicates that the third block corresponding to the second block specified as the update area is invalid and outputs a result of the calculation as calculation data; and a write section that writes the calculation data output from the calculation section in the third block associated with the update target and validates the third block in the management information stored in the management information storage section.
摘要:
A cast aluminum base frame of a movable guide for a timing chain in an internal combustion engine is produced by a die in which the parting lines are located so that the shoe-engaging surface of the base frame and the pivot shaft-receiving hole are each formed by a continuous surface of the die, without oppositely pitched drafts.
摘要:
In a hydraulic tensioner, a check valve assembly comprises a synthetic resin ball guide with a check ball movable therein. Oil grooves are provided in the wall of the ball guide, and minimum clearance is allowed between the ball and the wall of the ball guide. The ball is biased toward a metal ball seat formed as a separate element from the ball guide and attached to the ball guide by crimping portions of the synthetic resin of the ball guide over a flange of the seat, using heat fusion. A metal retainer disc, also a separate element, is similarly attached to the ball guide by crimping using heat fusion. A resilient annular lip is formed on the synthetic resin ball guide, and the assembly is press-fit into a plunger-receiving hole in a tensioner housing with the lip in engagement with the wall of the hole.
摘要:
A plastic hydraulic tensioner comprises a metal liner insert-molded in a hole in a synthetic resin tensioner body. A protruding plunger, slidable in the liner of the tensioner body is urged in the protruding direction by a compression spring, and the plunger, the liner and the bottom of the lined hole form a high pressure oil chamber. A flat or concave groove is formed on or in the outer peripheral surface of the liner, and the liner is formed with a protrusion extending outward from the flat or groove to engage a part of the synthetic resin of the tensioner body so that the liner is prevented from being pushed out of the tensioner body by oil pressure in the high pressure oil chamber.