JP2007138931A - Internal combustion engine having lubrication system, cooling system and starting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new idea for a lubrication system, a cooling system and a starting system of an internal combustion engine capable of reducing the total assembling cost. <P>SOLUTION: Distribution pipes of the lubrication system, the cooling system and the starting system are integrated in the shape of one common structure unit. The structure unit is composed of a plurality of pipe segments 21 for forming a lubricating oil passage 22, a cooling water passage 23 with a cooling water supply-discharge passage and a stating air passage 24. The structure unit composed of the plurality of pipe segments 21 is arranged along an engine block 30 to be connected to an engine internal pipe of the respective lubrication system, cooling system and starting system by separate connecting pipes 26 to 29. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The invention relates to an internal combustion engine according to the preamble of claim 1.

  In the case of a conventionally known four-cycle heavy oil fuel engine, particularly at a medium speed, it is disposed in an engine block, an assembly of a lubrication system for oil circulation lubrication for an engine, particularly a cylinder, a fuel supply device, and an optional supercharging device. In particular, a cooling system assembly for supplying cooling water to a plurality of cylinders and a starting system assembly for starting an internal combustion engine with compressed air have separate configurations in the form of separate pipe assemblies. Has been formed as an element.

  That is, the above-mentioned internal combustion engine has, for example, one lubricating oil pump, and a lubricating oil distribution pipe is connected to the pump, and this distribution pipe is connected to the crankshaft, the cylinder and the fuel supply via the engine internal conduit. Lubricating oil is supplied to a cylinder block including elements, a valve driving device, and a supercharging device that is optionally provided.

  In the case of a known internal combustion engine, for example, a lubricating oil pump pumps oil from an oil tank and generally pumps it through a supply pipe to a distribution pipe. From the distribution pipe, at least one branch pipe communicates with each crankshaft. Oil is routed through holes in the crankshaft to the crankshaft bearing and other locations to be lubricated. Oil is generally sent from a distribution pipe arranged along the longitudinal axis of the engine to a tappet with a roller and a fuel injection pump of a valve drive device through a branch pipe and a hole in a cylinder block. Furthermore, piping from the distribution pipe to each control shaft bearing is branched.

  The cooling water is usually guided in a distribution pipe extending along one side of the cylinder row, and is sent to the cooling chamber of the cylinder block through one supply pipe for each cylinder, and is sent from there to the collecting pipe.

  The engine is started with compressed air. The compressed air is generally removed from the air tank and sent to a cylinder valve. Depending on the structure of the engine, a starting air supply pipe and a starting valve are provided in one or both cylinder rows of the V-shaped engine.

  The three separate assemblies described above require labor intensive pre-assembly, which significantly increases the total assembly time.

  An object of the present invention is to provide a new concept for a lubrication system, a cooling system, and a starting system that can reduce the total assembly time.

  This problem is solved by the internal combustion engine according to claim 1. In accordance with the present invention, the lubrication system, cooling system, and starting system distribution pipes are combined into one common structural unit, which comprises a lubricating oil passage, a cooling water passage with a cooling water supply / discharge passage, and a starting air. In order to form a passage, it is composed of a plurality of piping segments. A structural unit consisting of a plurality of piping segments is arranged along the engine block such that separate communication pipes connect each lubrication system, cooling system, and starting system to the engine internal pipeline.

  This measure greatly advances development towards a “pipeless engine”, ie a pipeless internal combustion engine. Traditionally, three separate assemblies are assembled into a single assembly of multiple piping elements to achieve a significant reduction in the number of parts, and simple pre-assembly, thus a fairly short total assembly time Can clearly be achieved.

  The present invention also provides that each pipe segment is formed as a cast product having at least three passages, and the cast product is combined in the form of a module, each cast product including at least one cooling water inlet and It is proposed to have a cooling water outlet, at least one oil inlet and at least one starting air inlet. The structural unit composed of the piping segment is arranged in parallel with the exhaust pipe of the cylinder so that the exhaust pipe is supported by the piping segment and the piping segment is fixed to the engine block.

  As a result, there is an advantage that the exhaust pipe can be supported on the pipe segment. Therefore, in a known internal combustion engine, a holding element formed as a separate component and, in some cases, a support bracket for fixing an exhaust pipe conventionally used are not necessary.

  In an advantageous embodiment of the invention, when the cylinders are arranged in a V-shape, the pipe segment assembly is placed below the exhaust pipe between the cylinders and to each cylinder required for that or to other parts to be supplied. This medium connection can be realized by connecting tubes in the form of plug-in connection elements.

  A simple plug connection allows simple finishing and management of the cast pipe segment.

  The piping segment may be designed so that it feeds four cylinders.

  Advantageous embodiments of the invention emerge from the dependent claims and the following description. Hereinafter, examples of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. In FIG. 2 and FIG. 3, the same parts are denoted by the same reference numerals.

  FIG. 1 shows a V-shaped engine, and an engine block 1 includes an oil sump (oil pan) 2 on the lower side. Lubricating oil / distribution pipes 3 are provided along both outer surfaces of the engine block 1. A branch pipe 4 for supplying oil from the lubricating oil / distribution pipe 3 to the crankshaft 5 is provided.

  Here, a lubricating oil pump (not shown) conveys oil from the oil tank to the distribution pipe 3 as is well known. A branch pipe 4 from the distribution pipe 3 leads to each crankshaft bearing, and an oil through hole in the crankshaft 5 leads to a location to be lubricated.

  The oil is led out from the distribution pipe 3 and sent to the tappet with rollers of the valve drive device 6 and the fuel injection pump 7.

  Between the cylinder 8 of the V-shaped engine, a supply path and a discharge path in the form of a cooling distribution pipe 9 are arranged. A branch pipe 10 leads to an internal pipe line of the engine 1 for supplying to the cooling chamber of the cylinder block. The cooling moisture pipe 9 is screwed to the engine block 1 by a unique holding element 11. An exhaust pipe 12 extends above the cooling moisture pipe 9, and the exhaust pipe 12 is supported by the engine block 1 by a unique support bracket 13.

  Similarly, start air distribution pipes 14 are installed on both outer side surfaces of the engine block 1. This starting air distribution pipe 14 is connected to an internal pipe line of the engine block 1 as is well known, and as a result, the starting air normally taken out from the air tank is sent to the valve of the cylinder.

  The lubrication system, the cooling system, and the starting system are formed as separate assemblies 3, 9, and 14 without using a common conduit.

  On the other hand, FIG. 2 shows a piping segment 21 according to the present invention in which a plurality of identical segments 21 are assembled into a module to produce one assembly. In this assembly, the lubrication system, cooling system and starting system distribution pipes are combined to form an oil passage 22, a cooling water passage 23 in the form of a cooling water inlet and a cooling water outlet, and a starting air passage 24. ing.

  The pipe segment 21 is designed to supply four cylinders 25. For each cylinder 25, a cooling water inlet 26, a cooling water outlet 27 and a starting air inlet 28 are provided in order to form a connecting pipe in the form of a plug-in nozzle (short pipe). Although FIG. 2 shows only the front side, the back side of the piping segment 21 is similarly formed. In order to supply oil to the engine block 30, the plug-in connection nozzle 29 is similarly opened downward from the oil passage 22.

  A holding element 31 is integrally formed with the pipe segment 21, and the element 31 supports an exhaust pipe 32 extending upward, and simultaneously fixes the pipe segment 21 to the engine block 30.

  Moreover, the piping segment 21 has the plug element 33 thru | or the connection element 34 in a both-ends end surface, By this plug element 33 thru | or the connection element 34, the some piping segment 21 can be couple | bonded together in the form of one assembly in the shape of a module.

  FIG. 3 again shows in perspective view an internal combustion engine according to the invention comprising four cylinders 25 of the V-shaped engine 30 and an exhaust pipe 32 passing between the cylinder rows.

  2 is fixed to the engine block 30 on the lower side in parallel by a holding element 31 integrally formed with the pipe segment 21. The holding element 31 supports an exhaust pipe 32 positioned thereon, and the exhaust pipe 32 is fixed on the holding element 31 with mounting screws. Each plug connection nozzle 26-29 is coupled to a corresponding piping nozzle of the engine block 30.

  Therefore, according to the present invention, the assembly constituted by the pipe segments 21 can integrate a number of functions, that is, supply of oil, lubricant and start-up air, and support / support functions for the exhaust pipe and distribution pipe. In the case of conventionally known internal combustion engines, these functions have been realized in separate assemblies.

  This greatly simplifies the structure of the internal combustion engine.

Sectional drawing of a conventionally well-known internal combustion engine. 1 is a perspective view of a piping segment according to the present invention having an oil passage, a cooling water passage and a starting air passage. 1 is a perspective view of an assembled state of an internal combustion engine according to the present invention with piping segments joined in the form of a single structural unit. FIG.

Explanation of symbols

21 piping segment, 22 oil passage, 23 cooling water passage, 24 start air passage, 25 cylinder, 26 cooling water inlet, 27 cooling water outlet, 32 exhaust pipe 30 engine block

Claims (5)

A lubricating system for circulating oil, a cooling system for supplying cooling water to a plurality of cylinders arranged in the engine block, and a starting system for starting the internal combustion engine with compressed air. In an internal combustion engine that includes a distribution pipe, and that the distribution pipe is connected to each pipe of the engine block via a branch pipe or a supply pipe,
Lubricating system, cooling system, and starting system distribution pipes are gathered in the form of one common structural unit, and the structural unit comprises a lubricating oil passage (22) and a cooling water passage (23) with a cooling water supply / discharge passage. And a plurality of piping segments (21) to form a starting air passage (24), and a structural unit consisting of the plurality of piping segments (21) is cooled with each lubrication system by a separate connecting pipe (26-29). An internal combustion engine arranged along the engine block (30) so that a connection of the system and the starting system to the engine internal conduits occurs.   Each piping segment (21) is formed as a casting having at least three passages (22, 23, 24), the castings being connected in the form of a module, each casting being at least one An internal combustion engine according to claim 1, characterized in that it has a cooling water inlet (26), a cooling water outlet (27), at least one oil inlet (29) and at least one starting air inlet (28).   The assembly comprising the pipe segment (21) is parallel to the exhaust pipe (32) of the cylinder (25), the exhaust pipe (32) is supported by the pipe segment (21), and the pipe segment (21) is the engine. 3. The internal combustion engine according to claim 1, wherein the internal combustion engine is arranged so as to be fixed to the block (30).   Cylinders (25) are arranged in a V shape, and an assembly of piping segments (21) is arranged below the exhaust pipe (25) between the cylinders (25). Each cylinder (25) and other to be supplied 4. Internal combustion engine according to claim 3, characterized in that the medium connection (26, 27, 28) to this point is realized by a connecting tube in the form of a plug-in connection element.   5. Internal combustion engine according to claim 4, characterized in that the pipe segment (21) feeds four cylinders (25).

Images