Abstract:
For a device for fracture separating bearing covers of aligned bearing bores in bearing arrangements of a machine member, which comprises a guided separating element which is profiled in an approximately semicircular shape and acts in the center onto a bearing cover in the bearing bore, for obtaining a device which is structurally simple, it is suggested that, for the fracture separating, a half-mandrel or full mandrel, which can be axially arranged in one or several bearing bores, is provided. An operating linkage, which only causes the guiding of the respective mandrel in the fracture separating direction, is applied to the respective mandrel transversely to its longitudinal course, the respective mandrel being held in a rotationally secured manner and each bearing cover being rotationally secured while being clamped against the respective mandrel.
Abstract:
An opposed-cylinder internal-combustion engine, includes a cylinder block and crankcase which is longitudinally divided in the center of the crankshaft bearing. A bearing support is connected with the crankcase by way of cylinder head bolts. The cylinder block and crankcase has a joint vertical junction plane with the bearing support. Both bearing support halves are, on the one hand, connected with one another by way of bearing block screws and, on the other hand, the bearing support is held by way lo of cylinder head bolts between the crankcase halves arranged at both sides of the bearing support while forming oil ducts. At the same time, cylinder heads can be fastened on the crankcase by way of the screws.
Abstract:
A cylinder block has a cylinder block body and a cylinder liner block mounted by casting in the cylinder block body. The cylinder liner block is formed from a material having a rigidity larger than that of the cylinder block body, and the cylinder liner block comprises a liner section mounted by casting in position in a cylinder barrel portion of the cylinder block body, and a reinforcing wall section mounted by casting in position in a bearing wall of a crank case portion of the cylinder block body. Thus, it is possible to increase the wear resistance of cylinders in the cylinder block, as well as to provide an increase in performance by reductions in vibration and noise of the engine including the cylinder block, and to provide reductions in size, weight and cost of the cylinder block by a reduction in thickness of the bearing walls.
Abstract:
A refrigerant compressor for using HFC 134a as a refrigerant and a refrigerator oil such as polyether type oil, polyester type oil, or the like which is compatible thereto is disclosed. The refrigerant compressor has a iron type substrate with a compound layer mainly made of iron sulfide on sliding portions such as sliding parts and shaft in the compression mechanism. The sliding parts in the compression mechanism are a cylinder and a rotor and a piston which are moving parts. In a rotary type compressor, the sliding parts are a blade and so forth. The hardness of the compound layer mainly made of the aforementioned iron sulfide is large and thereby effectively preventing metals from being contacted and preventing adhesive abrasion which is the primary cause of the abrasion of the sliding portions. In addition, since the compound is stable in a moist situation, even if it is used along with polyether type oil, polyester type oil, or the like and HFC 134a, corrosion and abrasion due to dissolving of compound layer can be prevented.
Abstract:
An engine unit includes a cylinder block of a short-skirt type which has a plurality of first partition walls and a plurality of crank journals formed on the partition walls and rotatably receiving the crankshaft. Bearing caps are fitted to the crank journals and rotatably hold the crankshaft in cooperation with the crank journals. A lower case is fixed to the cylinder block and covers the crankshaft. The lower case includes a pair of flanges abutting against the lower edges of the skirt portions, a semi-cylindrical bottom wall, and a plurality of second partition walls formed on the bottom wall to oppose the first partition walls. Each bearing cap is clamped between the first and second partition walls. The lower case is fixed to the cylinder block by means of first bolts screwed into the skirt portions through the flanges, and second bolts screwed into the crank journals through the second partition walls and bearing caps.
Abstract:
Multicylinder internal combustion engine of the type having a crankshaft and a block comprised of first and second mating half sections joined in a common plane which passes through and along the axis of the crankshaft. The half sections provides a crankcase crankshaft bearing support and cylinder portions. A unitized cylinder head and sleeve construction is provided. A cooperative securing mechanism is provided for securing the unitized cylinder head and sleeve construction to the engine block.
Abstract:
An improved crankcase structure for engine blocks and the like, may be fabricated wherein the crankcase is initially cast or otherwise formed with bearing caps integral therewith. The caps are preferably secured by severable connecting portions unidirectionally longitudinally adjacent their associated bearing receiving portions in the transverse webs of the cylinder block. The complete crankcase is then machined and the bearing caps are separated for subsequent assembly to the crankcase in conventional fashion. Consequently, the invention reduces the amount of tooling and machining time and equipment required for manufacturing crankcases for engine blocks and the like.
Abstract:
An internal combustion engine comprises a cylinder block formed of aluminum alloy and having main bearing bulkheads each of which is formed with a bearing surface. Main bearing caps are securely connected respectively with the bearing bulkheads and formed of aluminum alloy. Each bearing cap is formed with a bearing surface which is located in opposition to the bearing surface of the bearing bulkhead. Additionally, the main journal of a crankshaft formed of iron alloy is rotatably disposed between the bearing surfaces of the bearing bulkhead and bearing cap. The surfaces of the crankshaft main journal is in direct contact with the bearing surfaces of the bearing bulkhead and bearing cap without using conventional bearing metals, thereby cutting off engine noise due to the existence of the bearing metals.
Abstract:
A piston for internal combustion engines has piston ring grooves at least one of which is totally or partly defined by an embedded body of a Fe based sintered material containing Ni and Cu. The sintered material is of a density of 5.5 to 6.8 g/cm.sup.3.
Abstract translation:用于内燃机的活塞具有活塞环槽,其至少一个全部或部分地由含有Ni和Cu的Fe基烧结材料的嵌入体构成。 烧结材料的密度为5.5〜6.8g / cm 3。
Abstract:
PCT No. PCT/US79/00259 Sec. 371 Date Apr. 23, 1979 Sec. 102(e) Date Apr. 23, 1979 PCT Filed Apr. 23, 1979 PCT Pub. No. WO80/02308 PCT Pub. Date Oct. 30, 1980Substantial heat is generated at the crown portion (18) of a piston (10). Cooling fluid has been directed to cavities (46) in the underside of the crown (18). However, at critical points of the piston cycle, the fluid drains from the cavities due to the forces of gravity. An oil cooled piston (10) is provided which includes a fluid trap (50) adjacent the crown (18). Some of the cooling fluid is trapped as it drains and is retained to enhance cooling of the crown (18). The fluid trap (50) includes a slot (60) permitting a jet spray of lubricating oil to be directed past the trap (50) to the cavities adjacent the underside of the crown (18).