JP2009047110A - Internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal combustion engine capable of reducing the number of components and compacting. <P>SOLUTION: A turbo charger 21 is mounted on the upper surface, and an oil cooler 22 for cooling engine oil is mounted on the lower surface of a breather chamber cover 10. An oil pipe 31 to be jointed to the main gallery of a cylinder block 1, a connector 32 to which a radiator hose and a hose for cooling the turbo charger are connected, a connector 33 to which a hose for feeding cooling water to an EGR cooler is connected, and others are attached to the breather chamber cover 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an internal combustion engine mounted for automobiles and the like, and more particularly, to a technique for realizing a reduction in the number of components and a reduction in size.

As a multi-cylinder reciprocating engine for automobiles, the V type in which a cylinder axis of each cylinder is arranged in a straight line and a plurality of cylinder banks (cylinder rows) are formed at predetermined angular intervals on the upper part of the crankcase is old. Exists from. In a V-type engine, a V-shaped cross-section space (hereinafter referred to as a V bank) is generated as a dead space between a pair of cylinder banks. Therefore, in order to effectively use the V bank, a breather chamber is defined by covering the upper part of the V bank with a breather chamber cover (cover) (see Patent Document 1), or a turbocharger (overload) in the V bank. In order to reduce the size of the engine unit by installing the supply device) together with the shielding member, see Patent Document 2 has been proposed.
Japanese Utility Model Publication No. 64-7209 Japanese Patent No. 3740935

  The breather chamber cover of Patent Document 1 is a plate material having a relatively complicated shape, but is used only for defining the breather chamber and does not contribute to the reduction in the number of engine components. Further, the turbocharger of Patent Document 2 is configured to be fastened to the upper part of the V bank together with the shielding member to cope with oil leakage or the like, but the number of engine components increases due to the presence of the shielding member. I could not deny it. Engines and turbochargers are equipped with various oil passages and cooling water passages. If these oil passages and cooling water passages are formed with pipes (hoses and pipes), the number of parts and assembly man-hours increase. There was a problem to do.

  The present invention has been made in view of such a background, and an object of the present invention is to provide an internal combustion engine that realizes a reduction in the number of components, a reduction in size, and the like.

  An internal combustion engine according to a first aspect of the present invention includes a cylinder block having a pair of cylinder banks formed at a predetermined angular interval on an upper portion of a crankcase, and a breather chamber fastened to an upper surface of the cylinder block together with the pair of cylinder banks. And a breather chamber cover that defines an oil cooler attached to a surface of the breather chamber cover on the breather chamber side.

  According to a second aspect of the present invention, there is provided the internal combustion engine according to the first aspect, wherein a supercharging device is attached to the breather chamber cover on a surface opposite to the breather chamber. Features.

  According to a third aspect of the present invention, in the internal combustion engine according to the first or second aspect, an oil passage through which engine oil flows is formed in the breather chamber cover.

  The invention according to claim 4 is the internal combustion engine according to any one of claims 1 to 3, wherein the breather chamber cover is provided with cooling water through which cooling water used for cooling engine oil flows. A passage is formed.

  According to the invention of claim 1, since the breather chamber cover also serves as a support member for the oil cooler, the number of components is reduced and the oil cooler is accommodated in the breather chamber, so that the engine unit can be made compact. Is done. According to the invention of claim 2, since the breather chamber cover also serves as a support member for the turbocharger, the number of components is reduced, and the turbocharger is accommodated in the V bank, so that the engine unit can be made compact. Is also realized. According to the invention of claim 3, the number of oil hoses and oil pipes around the engine is reduced, and the number of parts and the number of assembling operations can be reduced. According to the invention of claim 4, the number of water hoses and water pipes around the engine is reduced, and the number of parts and the number of assembly operations can be reduced.

Hereinafter, an embodiment in which the present invention is applied to a V-type 6-cylinder engine will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a main part of an engine according to the embodiment, FIG. 2 is an exploded perspective view showing a main part of the engine according to the embodiment, and FIG. 3 is a longitudinal sectional view of the main part of the engine according to the embodiment. FIG. 4 is a perspective view of the breather chamber cover according to the embodiment as viewed obliquely from above, and FIG. 5 is a perspective view of the breather chamber cover according to the embodiment as viewed from obliquely below.

  As shown in FIGS. 1 to 3, the cylinder block 1 of the engine E is configured such that left and right cylinder banks 3 and 4 of three cylinders are arranged in a V shape at a predetermined angular interval on an upper part of a crankcase 2. As shown in FIG. 2, a concave portion 7 surrounded by the left and right cylinder banks 3 and 4 and the front and rear wall portions 5 and 6 is formed at the upper portion. A breather chamber cover 10 is fastened to the upper surface of the cylinder block 1, and a breather chamber 11 is defined by the breather chamber cover 10 and the recess 7 as shown in FIG. 3. As shown in FIG. 3, the cylinder block 1 has a lower communication hole 12 for communicating the crank chamber 16 and the breather chamber 11, and an upper communication for communicating the breather chamber 11 and the left and right cylinder heads (not shown). Holes 13 and 14 are formed, and blow-by gas in the crank chamber 16 is guided to the cylinder head through the communication holes 12 to 14. A balancer shaft 15 is rotatably held on the front and rear wall portions 5 and 6 of the cylinder block 1.

  As shown in FIG. 2, the breather chamber cover 10 has a turbocharger 21 attached to the upper surface and an oil cooler 22 for cooling engine oil attached to the lower surface. The breather chamber cover 10 is connected to an oil pipe 31 connected to a main gallery (not shown) of the cylinder block 1, a connector 32 to which a radiator hose and a hose for turbocharger cooling (not shown) are connected, an EGR cooler A connector 33 and the like to which a hose for supplying cooling water is connected to (not shown) are attached.

  As shown in FIGS. 4 and 5, the breather chamber cover 10 has a turbocharger fastening seat 41 to which the turbocharger 21 is fastened on its upper surface, and an oil cooler fastening seat to which the oil cooler 22 is fastened. 42 is formed. The turbocharger fastening seat 41 is provided with an oil supply hole 43 for supplying engine oil to the turbocharger 21 and an oil discharge hole 44 for discharging engine oil from the turbocharger 21. The oil cooler fastening seat 42 has a cooling water introduction hole 45 for introducing cooling water into the oil cooler 22, a cooling water discharge hole 46 through which the cooling water from the oil cooler 22 is discharged, and engine oil is introduced into the oil cooler 22. The oil introduction hole 47 and the oil discharge hole 48 through which engine oil is discharged from the oil cooler 22 are formed.

  The lower surface of the breather chamber cover 10 includes an oil supply hole 49 for supplying engine oil from the cylinder block 1, two cooling water supply holes 50 and 51 for supplying cooling water from the cylinder block 1, and an oil cooler 22. An oil supply hole 52 for supplying the cooled engine oil to the journal of the balancer shaft 15, an oil discharge hole 53 for returning the engine oil to the cylinder block 1, and the like are formed. 4 and 5, black arrows indicate the flow of engine oil, and white arrows indicate the flow of cooling water.

  As described above, in this embodiment, the breather chamber cover 10 also serves as a support member for the turbocharger 21 and the oil cooler 22 and includes a passage for engine oil and cooling water. Assembling work can be greatly reduced.

  Although the description of the specific embodiment is finished as above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the above embodiment, the breather chamber cover supports the turbocharger and the oil cooler, but other auxiliary devices may be supported. Further, the specific shape of the breather chamber cover, the specific passage configuration of the engine oil and the cooling water, and the like can be changed as appropriate without departing from the gist of the present invention.

It is a perspective view showing an important section of an engine concerning an embodiment. It is a disassembled perspective view which shows the principal part of the engine which concerns on embodiment. It is a principal part longitudinal cross-sectional view of the engine which concerns on embodiment. It is the perspective view which looked at the breather chamber cover concerning an embodiment from the slanting upper part. It is the perspective view which looked at the breather chamber cover concerning an embodiment from the slanting lower part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder block 3 Left cylinder bank 4 Left cylinder bank 7 Recessed part 10 Breather chamber cover 11 Breather chamber 21 Turbocharger 22 Oil cooler 32 Connector 33 Connector 41 Turbocharger fastening seat 42 Oil cooler fastening seat 43 Oil supply hole 44 Oil discharge hole 45 Cooling Water introduction hole 46 Cooling water discharge hole 47 Oil introduction hole 48 Oil discharge hole 49 Oil supply hole 50 Cooling water supply hole 52 Oil supply hole 53 Oil discharge hole E Engine

Claims (4)

A cylinder block having a pair of cylinder banks formed at a predetermined angular interval on an upper portion of the crankcase; and a breather chamber cover fastened to the upper surface of the cylinder block and defining a breather chamber together with the pair of cylinder banks;
An internal combustion engine having an oil cooler attached to the breather chamber side surface of the breather chamber cover.   The internal combustion engine according to claim 1, wherein a supercharging device is attached to the breather chamber cover on a surface opposite to the breather chamber.   The internal combustion engine according to claim 1, wherein an oil passage through which engine oil flows is formed in the breather chamber cover.   The internal combustion engine according to any one of claims 1 to 3, wherein the breather chamber cover is formed with a cooling water passage through which cooling water used for cooling engine oil flows. .

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