JPH0633842A - Engine formed integrally with intake passage - Google Patents

Abstract

PURPOSE:To reduce the place for the installation of an intake passage and permit the stable installation as for an engine which is formed integral with an intake passage which is formed integrally with the engine outer shell. CONSTITUTION:A cylinder block side intake passage 8 is formed integrally with a cylinder block 1, and a cylinder head side intake passage 8 is formed integrally with the cylinder head 2, and the cylinder block side intake passage 8 and the cylinder head side intake passage 4 communicate by forming the cylinder block 1 integrally with the cylinder head 2, and an intake passage B is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake passage integrated engine in which an intake passage communicating with a combustion chamber is integrally formed with an engine outer shell.

[0002]

2. Description of the Related Art FIG. 4 is a partial cross-sectional view showing a conventional intake passage constituting portion of an engine. In FIG. 4, 1
Is a cylinder block, 2 is a cylinder head, and these are combined together to form an outer shell of the engine A and at the same time a combustion chamber 3 is formed. The cylinder head 2 is integrally provided with an intake passage 4 which forms a part of the intake passage B. An intake valve 5 is provided at an opening portion of the intake passage 4 to the combustion chamber 3 and an injector is provided at a part thereof. 20 are provided.

By the way, an intake passage B for sending air to the combustion chamber 3
Needs to have a certain length and have a curved shape in order to reduce the flow resistance of the air and the filling efficiency of the combustion chamber 3. As shown in the figure, the curved shape is, for example, U-shaped. The long intake pipe 4a is connected to the upstream side of the intake passage 4. Therefore, in order to stably and firmly support the curved intake pipe 4a with respect to the outer shell of the engine A, the outer wall portions of the cylinder block 1 and the cylinder head 2 are provided with sturdy support rods (stickies) 22 at several places. Several portions of the curved intake pipe 4a are supported and attached.

Generally, in the case of a multi-cylinder engine, the intake passage 4 and the curved intake pipe 4a are formed as a plurality of intake manifolds, and a surge tank 9 is provided on the upstream side thereof.

[0005]

However, in such a conventional device, since the curved intake pipe (intake manifold) is supported via the stay, the mounting rigidity is not strong, and therefore, the mounting rigidity is not so strong. The mounting rigidity of the surge tank, throttle body, delivery pipe, etc. to be installed is not strong, and moreover, a space for installing a curved intake pipe is required. There are issues such as restrictions on the length of the pipe.

The present invention was devised in view of the above-mentioned problems, and an intake passage portion including a curved intake pipe is integrally formed with a cylinder block and a cylinder head, and is provided in an outer shell portion of an engine in a built-in manner. By doing so
An object of the present invention is to provide an intake passage integrated engine in which the installation of the intake passage is strong and stable.

[0007]

For this reason, the intake passage-integrated engine according to claim 1 of the present invention is formed integrally with the cylinder block in an engine constructed by combining a cylinder block and a cylinder head. An inlet of the cylinder block side intake passage is opened to a side portion of the cylinder block, and an outlet of the cylinder block side intake passage is opened toward a combined surface with the cylinder head. The inlet of the cylinder head side intake passage integrally formed with the cylinder block side is opened toward the joining surface with the cylinder block, and the cylinder block side intake passage and the cylinder are formed by joining the cylinder block and the cylinder head. It is characterized in that the head side intake passage communicates with each other to form an intake passage integrated with the engine.

According to a second aspect of the present invention, there is provided an intake passage-integrated engine, wherein the cylinder block side intake passage and the cylinder head side intake passage are formed integrally with the cylinder block and the cylinder head, respectively. It is characterized in that the same number of cylinder block side intake manifold portions and cylinder head side intake manifold portions are formed.

Further, in the intake passage integrated engine according to claim 3 of the present invention, a surge tank portion communicating with the intake passage is provided upstream of the cylinder block side intake passage integrally formed with the cylinder block. It is characterized in that it is formed integrally with the cylinder block.

[0010]

In the intake passage integrated engine according to claim 1 of the present invention described above, the cylinder head side intake passage integrally formed with the cylinder head and the cylinder block side intake passage integrally formed with the cylinder block are: At the same time when the engine outer shell is integrally formed, it is communicated with each other to form a curved intake passage having a predetermined length in the engine outer shell.

According to the second aspect of the present invention, there is provided an intake passage integrated engine, wherein a cylinder head side intake manifold portion formed integrally with the cylinder head and a cylinder block side intake manifold portion formed integrally with the cylinder block. However, the engine outer shell is integrally formed, and at the same time, it is connected to form a curved intake manifold portion having a predetermined length in the engine outer shell portion.

Further, in the intake passage integrated engine according to the third aspect of the present invention, the cylinder head side intake passage integrally formed with the cylinder head, the cylinder block side intake passage integrally formed with the cylinder block, and the same. The surge tank portion communicating with the upstream side forms the engine outer shell in a united manner, and at the same time, is connected to form a curved intake passage having a predetermined length and the surge tank portion connected to the curved intake passage in the engine outer shell portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an intake passage integrated engine according to the present invention, and FIG. 1 shows an embodiment of the intake passage integrated engine. 2 is a partial sectional view of an engine showing another embodiment, FIG. 3 is a partial side view of the engine seen from the direction of arrow III in FIG. 2, and FIG. The same symbols as 4 indicate almost the same parts.

In FIG. 1, 1 is a cylinder block manufactured by casting and 2 is a cylinder head which is also manufactured by casting. By joining the two together from above and below, the outer shell of the engine A is joined. And the combustion chamber 3 is formed by this combination.
A curved cylinder head side intake passage 4 communicating with the combustion chamber 3 is formed in the cylinder head 2 at the same time when the cylinder head 2 is molded, and the upstream side inlet of the cylinder head 2 is provided with an extension portion 2a extending laterally. The lower surface is opened downward so as to face the upper surface of the cylinder block 1. Further, the downstream outlet communicates with the combustion chamber 3 and an intake valve 5 is provided at this outlet.

Further, the cylinder head 2 has a combustion chamber 3
An exhaust passage 6 communicating with the exhaust gas is integrally formed, and an exhaust valve 7 is provided at an inlet portion of the exhaust passage 6 on the combustion chamber 3 side. On the other hand, the cylinder block 1 is formed with an extension portion 1a laterally opposite to the extension portion 2a of the cylinder head 2 and
A curved cylinder block side intake passage 8 is formed in the extending portion 1a at the same time when the cylinder block 1 is molded.

The cylinder block side intake passage 8
The upstream side inlet is opened upward (or sideward) on the side of the cylinder block 1, and the downstream side outlet is opened so as to coincide with the upstream side inlet of the cylinder head side intake passage 4. Therefore, when the cylinder block 1 and the cylinder head 2 are united, the cylinder block side intake passage 8 and the cylinder head side intake passage 4 are connected to each other to form a curved intake passage B having a predetermined length. Become.

By the way, the length of the intake passage B of a general engine is 400 to 500 in consideration of the filling efficiency into the combustion chamber.
Since the curved intake passages 8 and 4 communicate with each other, the intake passage B having a small air flow resistance and a desired length is formed. Further, a surge tank 9 is connected to an upstream side inlet of the cylinder block side intake passage 8, and an air cleaner (not shown) is further connected to the surge tank 9.

In the figure, 10 is an exhaust pipe connected to the exhaust passage 6, 11 is a rocker arm, 12 is a camshaft, 1
Reference numeral 3 is a piston, 14 is a water jacket, and 15 is an oil pan, and the fuel injection valve is not shown. With this configuration, in this embodiment, the cylinder block side intake passage 8 communicating with the cylinder head side intake passage 4 is integrated with the cylinder block 1, and the cylinder head side intake passage 4 is integrated with the cylinder head 2. With this, the intake passage B can be built into the outer shell of the engine A, and the conventional construction such as connecting a curved intake pipe to the outside of the engine to support it becomes unnecessary,
The rigidity of the intake passage B is greatly increased, and the restriction of the shape of the intake passage is not imposed, the installability of the intake passage B can be greatly improved, and the engine can be easily assembled and manufactured.

Next, another embodiment shown in FIGS. 2 and 3 will be described. In the drawings, reference numeral 2 is a cylinder head, and the cylinder head side intake air is formed in the extending portion 2a of the cylinder head 2 at the same time when the cylinder head is molded. The passage is formed as a number of curved cylinder head side intake manifold portions 16 of a number corresponding to the number of cylinders of the engine A, and the upstream side inlets thereof are all open toward the joint surface with the cylinder block 1. Has been done.

Further, in the cylinder block 1, the cylinder block side intake passage formed in the extending portion 1a of the cylinder block 1 at the same time when the cylinder block 1 is formed is curved by several curves corresponding to the number of cylinders of the engine A. It is formed as the cylinder block side intake manifold portion 17, and the downstream outlet of each cylinder block side intake manifold portion 17 faces the cylinder head 2 so as to correspond to the upstream inlet of each cylinder head side intake manifold portion 16. It is opened toward.

Therefore, when the cylinder block 1 and the cylinder head 2 are united, the cylinder block side manifold portion 17 and the cylinder head side manifold portion 16 are connected to each other to form a curved intake manifold C having a predetermined length.
Will be formed several times. Further, simultaneously with the molding of the cylinder block 1, a surge tank portion 18 is formed on the upstream side of each cylinder block side intake manifold portion 17, and this is opened to one side and connected to the throttle body 19.

In FIGS. 2 and 3, 5 is an intake valve, 20 is an injector, 21 is a delivery pipe, and 14 is a water jacket. With the above-described configuration, in this embodiment, each cylinder block side intake manifold portion 17 is integrated with the cylinder block 1, and each cylinder head side intake manifold portion 16 is integrated with the cylinder head 2 and each intake manifold. Since C is built in the engine A, the rigidity of the intake manifold C is strengthened, and the parts can be integrated to reduce the number of parts. This has the effect of increasing the degree of freedom of layout for installation.

Further, in this embodiment, each cylinder block side intake manifold portion 17 is integrated with the cylinder block 1, and the surge tank portion 18 is also integrated with the cylinder block 1, so that each cylinder head side intake manifold is formed. With the integration of the part 16 with the cylinder head 2,
Each intake manifold C and surge tank part 18 are engine A
Since it is built in the inside, it is possible to further integrate the parts and reduce the number of parts, and it is possible to further expand the space in the engine room and increase the degree of freedom of layout for installing adjacent parts. .

[0024]

As described above in detail, according to the intake passage-integrated engine of the present invention according to claim 1, in an engine constructed by combining a cylinder block and a cylinder head, the engine is integrated with the cylinder block. An inlet of the cylinder block side intake passage to be formed is opened to a side portion of the cylinder block, and an outlet of the cylinder block side intake passage is opened toward a combined surface with the cylinder head. The inlet of the cylinder head side intake passage integrally formed with the head is opened toward the joining surface with the cylinder block, and the cylinder block side intake passage and the cylinder block side intake passage are formed by joining the cylinder block and the cylinder head. The cylinder head side intake passage communicates with each other to form an intake passage that is integral with the engine. Since it can be integrated, there is no need for a mechanism such as connecting an intake pipe to the outside of the engine and supporting it as in the past, and the structure and rigidity of the intake passage can be strengthened and the engine can be easily assembled and manufactured. Moreover, there is an advantage that a space around the engine can be widened.

Further, according to the intake passage integrated engine of the present invention according to claim 2, the cylinder block side intake passage and the cylinder head side intake passage formed integrally with the cylinder block and the cylinder head, respectively, Since they are formed as the same number of cylinder block side intake manifold parts and cylinder head side intake manifold parts, each manifold part is incorporated in the cylinder block, so parts are integrated and the number of parts is reduced. As a result, the space around the engine can be secured, and the degree of freedom in layout can be increased.

Further, according to the intake passage integrated engine of the present invention according to claim 3, a surge tank portion communicating with the intake passage is provided upstream of the cylinder block side intake passage integrally formed with the cylinder block. Is integrally formed with the cylinder block, the surge tank part together with the manifold parts is also incorporated in the cylinder block, and the parts are further integrated as compared with the case according to claim 2.
There is an advantage that the number of parts can be reduced, the production space can be further expanded, and the degree of freedom in layout can be increased to facilitate the production.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an intake passage integrated engine according to the present invention.

FIG. 2 is a partial cross-sectional view showing another embodiment of the intake passage integrated engine according to the present invention.

FIG. 3 is a partial side view of the engine seen in the direction of arrow III in FIG.

FIG. 4 is a partial cross-sectional view showing a part of an intake passage of an engine according to a conventional example.

[Explanation of symbols]

 1 Cylinder Block 1a Cylinder Block Extension 2 Cylinder Head 2a Cylinder Head Extension 3 Combustion Chamber 4 Cylinder Head Side Intake Path 4a Curved Intake Pipe 5 Intake Valve 6 Exhaust Path 7 Exhaust Valve 8 Cylinder Block Side Intake Path 9 Surge Tank 10 Exhaust pipe 11 Rocker arm 12 Camshaft 13 Piston 14 Water jacket 15 Oil pan 16 Cylinder head side intake manifold part 17 Cylinder block side intake manifold part 18 Surge tank part 19 Throttle body 20 Injector 21 Delivery pipe 22 Stay A Engine B Intake C intake Manifold

Claims (3)

[Claims] 1. In an engine configured by combining a cylinder block and a cylinder head, an inlet of a cylinder block side intake passage formed integrally with the cylinder block is opened at a side portion of the cylinder block. An outlet of the intake passage on the cylinder block side is opened toward a combined surface with the cylinder head, and an inlet of the intake passage on the cylinder head side integrally formed with the cylinder head is formed on a combined surface with the cylinder block. When the cylinder block and the cylinder head are joined together, the cylinder block side intake passage and the cylinder head side intake passage communicate with each other to form an intake passage integrated with the engine. A featured engine with an integrated intake path. 2. A cylinder block side intake manifold section and a cylinder head side intake section in which the cylinder block side intake passage and the cylinder head side intake passage, which are respectively formed integrally with the cylinder block and the cylinder head, are the same in number. The intake passage integrated engine according to claim 1, wherein the engine is formed as a manifold portion. 3. A surge tank portion communicating with the intake passage is formed integrally with the cylinder block on the upstream side of the cylinder block side intake passage formed integrally with the cylinder block. The intake passage integrated engine according to claim 1.