JPH0577573U - Internal combustion engine air cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] The guide pipe and intake manifold of a conventional air cleaner are omitted. That is, the air cleaner element is directly attached to the cylinder head 16, and the air cleaner cover 51 is provided around the air cleaner element 14, so that the air cleaner element 14 is covered by the cylinder head 16 and the air cleaner cover 51. Constitute. In an internal combustion engine, a recess 50 is formed in an intake port 53 bored in a cylinder head 16, an air cleaner element 14 can be fitted in the recess 50, and an air cleaner cover 51 is provided around the air cleaner element 14.
The air cleaner cover 51 and the cylinder head 1
By fixing with 6, the air cleaner device was obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a technique relating to improvement of a mounting structure of an air cleaner of an internal combustion engine.

[0002]

[Prior Art]

 In the conventional internal combustion engine, the cylinder head and the air cleaner are configured separately. Then, the intake air cleaned by the air cleaner is supplied to the intake manifold via the pipe, branched by the intake manifold, and supplied to the intake ports of the cylinder heads. Therefore, a guide pipe was needed, and an intake manifold was also needed.

[0003]

[Problems to be solved by the device]

 The present invention omits the guide pipe and the intake manifold which are required in the prior art. That is, the air cleaner element is directly mounted on the cylinder head 16, and the air cleaner element 51 is provided around the air cleaner element 14 to cover the air cleaner element 14 with the cylinder head 16 and the air cleaner cover 51. As an air cleaner.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. In an internal combustion engine, a recess 50 is formed in an intake port 53 formed in a cylinder head 16, an air cleaner element 14 can be fitted in the recess 50, and an air cleaner cover 51 is covered around the air cleaner element 14. The air cleaner cover 51 is fixed to the cylinder head 16 to form an air cleaner.

[0005]

[Operation] Next, the operation will be described. In the present invention, the air cleaner, which is conventionally formed as a separate body, is formed on the side wall of the cylinder head 16 by utilizing the cylinder head 16 as a part of the air cleaner. That is, half of the case of the air cleaner is constituted by the air cleaner cover 51, while the other case is constituted by the recess 50 of the cylinder head 16. The air cleaner element 14 is covered and housed by the recess 50 and the air cleaner cover 51 to form an air cleaner as a whole. The recess 50 serves as an intake manifold, and the air cleaner cover 51 serves as a guide pipe.

[0006]

【Example】

 Next, examples will be described. 1 is a front sectional view of an internal combustion engine in which a sub radiator 1 is arranged on a side of a cylinder block 8, FIG. 2 is a side sectional view of the internal combustion engine of FIG. 1, and FIG. 3 is a front view showing a state in which an air cleaner of the present invention is disassembled. FIG.

This will be described with reference to FIGS. 1 and 2. The internal combustion engine of this embodiment is a diesel engine. The sub radiator 1 is arranged on the right side of the cylinder block 8. In the conventional internal combustion engine in which the fuel pump and the fuel injection valve are separate bodies, the fuel pump is arranged on the right side portion of the cylinder block 8. Therefore, it was impossible to place another device in this part. In this diesel engine, the fuel pump 6 and the fuel injection valve 7 are configured as a unit injector U arranged above the cylinder head 16, and the cam shaft 5 that drives the fuel pump 6 is also a part of the cylinder head 16. Supported by. Therefore, the right side portion of the cylinder block 8 becomes an empty space, and the sub radiator 1, the sub radiator fan 2, the fan shaft 2a and the like can be arranged in this portion.

In the diesel engine of this configuration, an oil pan 4 is arranged at the lower end, and the oil pan 4 is fixed to the lower surface of the ladder frame 3. A cylinder block 8 is arranged on the ladder frame 3, a cylinder head 16 is mounted on the cylinder block 8, and a head cover 17 is mounted on the cylinder head 16. 1 and 2, the air cleaner device is arranged on the left side of the cylinder head 16, and the exhaust muffler 15 is arranged on the right side of the cylinder head 16. An alternator 12 and a starter motor 46 are arranged on the left side of the cylinder block 8, and vibration-damping support rubbers 11 and 13 are supported on the left and right of the ladder frame 3 by a vibration-proof rubber support 3a.

A side sectional view will be described with reference to FIG. A drive side sprocket 23 is arranged at the front end of the crankshaft 20, and a driven side sprocket 49 can be driven by a timing drive chain 24. The ratio of the drive side sprocket 23 and the driven side sprocket 49 is 1: 2. Further, a fan driving pulley 48 is arranged at the tip of the crankshaft 20, and the fan driving pulley 48 transmits power to a driven pulley 2b provided on the fan shaft 2a of the sub radiator fan 2. Guide cylinders 18 and 40 are provided around the sub radiator fan 2.

A flywheel 21 is fixed to the rear end of the crankshaft 20. A sub radiator cooling water pump 9 is attached to the fan shaft 2a that drives the sub radiator fan 2, and the cooling water inside the cylinder block 8 is sucked by the sub radiator cooling water pump 9 so that the inside of the sub radiator 1 is sucked. And is cooled by the cooling air from the sub radiator fan 2.

Next, the main part of the present invention will be described with reference to FIG. The cylinder head 16 mounted on the cylinder block 8 has an intake port 53 and an exhaust port. In FIG. 3, an intake port 53 is opened on the left side as viewed. An exhaust port is opened toward the right side, and an exhaust muffler 15 is connected to the exhaust port. A head cover 17 is covered on the upper surface of the cylinder head 16, and a valve chamber is formed in the intake manifold of the cylinder head 16 and the head cover 17. Lubricating oil droplets generated inside the valve chamber are sucked by a lubricating oil droplet suction pipe 52 and guided into the air cleaner cover 51. The droplets sucked by the lubricating oil droplet suction pipe 52 are directly supplied to the combustion chamber.

A recess 50 is formed in the portion of the intake port 53 formed in the cylinder head 16. In the case of a multi-cylinder engine, there are a plurality of intake ports 53, but the configuration is such that the intake ports 53 are connected and a single recess 50 extending forward and backward is provided. Therefore, the recess 50 serves as an intake manifold in the conventional air cleaner device. Then, the air cleaner element 14 provided with a bracket is fitted and mounted so as to close the inlet of the recess 50. With the air cleaner element 14 fitted in the recess 50, the air cleaner cover 51 is fixed to the cylinder head 16.

The air cleaner cover 51 functions as a guide pipe in the conventional air cleaner device, and the cylinder head 16 and the air cleaner cover 51 are combined to form an air cleaner case. The lubricating oil splash suction pipe 52 is configured to communicate with the inside of the air cleaner cover 51. The concave portion 50 can be separately configured for each of the intake ports 53 of the multi-cylinder. In this case, the air cleaner cover 51 takes the role of the conventional intake manifold.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. That is, the recess 50 is formed in the intake port 53 formed in the cylinder head 16, the air cleaner element 14 can be fitted in the recess 50, and the periphery of the air cleaner element 14 is covered with the air cleaner cover 51. Since the air cleaner cover 51 is fixed to the cylinder head 16 to form an air cleaner, the intake manifold for separately guiding the intake air to each intake port 53, which is required in the conventional air cleaner device, is not necessary.

Further, the air cleaner cover 51 also serves as a guide pipe for guiding the intake air from the air cleaner to the intake manifold, which is required in the conventional air cleaner, and is thus unnecessary. Further, by half-fitting the air cleaner element 14 in the recess 50 of the cylinder head 16 having the same size as the conventional one, the entire internal combustion engine could be made compact.

[Brief description of drawings]

FIG. 1 shows a sub radiator 1 on the side of a cylinder block 8.
FIG. 3 is a front cross-sectional view of an internal combustion engine in which is arranged.

FIG. 2 is a side sectional view of the internal combustion engine of FIG.

FIG. 3 is a front view of a state in which a cylinder head 16, a head cover 17, an air cleaner element 14, and an exhaust muffler 15 are disassembled.

[Explanation of symbols]

 14 Air Cleaner Element 15 Exhaust Muffler 16 Cylinder Head 17 Head Cover 50 Recess 51 Air Cleaner Cover 52 Lubricating Oil Suction Pipe 53 Suction Port

Claims (1)

[Scope of utility model registration request] 1. In an internal combustion engine, a cylinder head 16
The recess 50 is formed in the intake port 53 formed in the
The air cleaner element 14 can be fitted in the air cleaner element 14, and the air cleaner element 14 is covered with an air cleaner cover 51, and the air cleaner cover 51 is fixed to the cylinder head 16 to form an air cleaner device. Air cleaner.