Internal-combustion engines – Cooling – Internal cooling of moving parts; e.g. – hollow valves,...
Patent
1988-07-06
1989-09-26
Bennet, Henry A.
Internal-combustion engines
Cooling
Internal cooling of moving parts; e.g., hollow valves,...
123196R, 184 24, F01P 104, F01M 100, F16N 100
Patent
active
048692115
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a lubricating oil channel according to the preamble of the claim 1, as is known for example from the DE-PS No. 968 013.
An internal combustion engine is illustrated in the DE-PS No. 968 013, whose pistons are cooled by spraying with lubricating oil by means of spray nozzles. The feed of the lubricating oil to the spray nozzles takes place by way of a lubricating oil channel which leads past in proximity of the open ends of the cylinder liners protruding into the crankcase. The spray nozzles are mounted under interposition of fitting pieces serving as holders on the outer circumference of the pipe-shaped constructed lubricating oil channel. In order that lubricating oil reaches the nozzle, the lubricating oil channel includes circumferential bores which adjoin at passages in the holders. A longitudinal bore in a cast piece extending in the engine longitudinal direction apparently serves as lubricating oil channel which appears to be cast-on at the crankcase. The fastening of the spray nozzles at the lubricating oil channel apparently takes place by means of a bolt each which seizes a spray nozzle holder from below and is screwed into a thread in the wall of the lubricating oil channel. This makes it necessary to keep the wall thickness of the lubricating oil channel so large that a sufficient depth of the thread for a sufficient holding of the fastening bolts is provided. With a cast-in lubricating oil channel, cutting machining-operations become necessary in the crankcase space.
By reason of control measures difficult to carry out in the crank space, it cannot be precluded that machining left-overs such as shavings remain in the lubricating oil channel or elsewhere in the crank space.
According to the DE-PS No. 844 990 the lubricant line is assembled of pipe sections and T-shaped connecting sections. The lubricating oil is not conducted to the pistons of the internal combustion engine by means of spray nozzles but instead by way of a sealed line connection by means of telescopic pipes. One outlet of each T-shaped connecting section therefore is in communication with a telescopic pipe. However, it is not illustrated how the lubricant line assembled in this manner is guided and secured in the crankcase. However, as no mountings are illustrated at the connecting sections, it must be assumed that the pipe sections disposed between the connecting sections are retained in some manner.
The invention is concerned with the task to indicate construction and arrangement of a lubricating oil channel which can be represented and varied in a simple and cost-favorable manner, can be laid out space-savingly in the crankcase, is readily accessible and also again disassemblable together with spray nozzles, and whereby it is assured also in particular that contaminations of the lubricating oil channel by shavings or other machining residues are precluded.
This task is solved with an arrangement of the aforementioned type by the characterizing features of the claim 1.
The particular construction of the spray nozzle holder, namely, that they can be attached at the cross walls of the crankcase, that they possess passages which adjoin the through-bores in the cross walls, and that they serve at the same time for holding the plug-in pipes which complete the lubricating oil channel, enables the simple and cost-favorable construction of a lubricating oil line in the crank space.
As the individual components of the lubricating oil channel are finish-machined prior to the installation and are controllable outside of the crank space as regards machining residues, a contamination of the lubricating oil channel is precluded. The principle of construction of the lubricating oil channel enables to lay-out the lubricating oil lines space-savingly at any desired place in the crankcase. For a space-saving arrangement, the lubricating oil line can be adapted to all special conditions in different crankcase constructions especially by means of only slight component changes. Thus, in a particular construction wi
REFERENCES:
patent: 3485324 (1969-12-01), Novak
Heberle Hansjorg
Leicht Werner
Bennet Henry A.
Ferensic Denise L.
MTU-Motoren und Turbinen-Union
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