JPS6123645Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air cleaner for an internal combustion engine used in vehicles such as automobiles.

Internal combustion engine of conventional automobiles (hereinafter referred to as engine)
In the air cleaner used in the air cleaner, the filter element is housed in a semi-fixed state in the air cleaner case, so the filter element becomes heavily contaminated in some parts, which causes the filter element to become clogged. Moreover, this clogging increases the resistance to the intake of air into the air cleaner, which worsens the fuel consumption of the engine. In order to solve these problems, conventional methods have been to clean the filter element according to the period of use and mileage of the car, and to rotate the filter element by hand inside the air cleaner case to change the position of dirt and equalize the distribution of dirt. Ta.

The purpose of this invention is to provide an air cleaner that makes the filter element inspection period longer than before, automatically equalizes the distribution of dirt, and maintains the fuel efficiency of the engine in a good state over a long period of time.

This invention will be explained below with reference to drawings showing embodiments. The air cleaner case 1 is composed of a cylindrical case body 2 with an open top and a cap 3 covering the top of the case body 2, which is made up of a circular peripheral wall 2a and a bottom plate 2b. A hole 4 communicating with the carburetor 5 is provided in the center of the bottom plate 2b. A ring-shaped filter 6 is installed inside the air cleaner case 1.
is housed almost concentrically with the air cleaner case 1. The filter 6 is composed of a pair of opposing element holding members 7 and 8 and a ring-shaped filter element 9 held therebetween. Element clamping members 7 and 8 each have a ring-shaped clamping plate 7.
a, 8a and the boss portion 7b located at the center thereof,
8b, clamping plates 7a, 8a, and boss portions 7b, 8b, and three equally spaced arms 7c, 8c. The filter element 9 is bent in a zigzag shape between the opposing holding plates 7a and 8a. A set bolt 10 is attached to the carburetor 5 on the center line of the carburetor 5, and the bolt 10 passes through the boss portions 7b, 8b of both element holding members 7, 8 and the center portion of the cap 3. A circular bearing receiver 11 is welded to the set bolt 10 below the boss portion 8b, and a bearing 12 and a washer 13 are attached to the set bolt 1 between this and the boss portion 8b of the element clamping member 8.
It is attached to 0. A bearing 14 is also interposed between the boss portion 7b of the upper element holding member 7 and the cap 3. Furthermore, bearing 1
4, the boss portion 7b of the element holding member 7, and the cap 3, washers (not shown) are fitted onto the set bolt 10, respectively. cap 3
Also on the upper side, set 10 bolts and 1 washer.
A thumbscrew 16 is attached to the set bolt 10 via a thumbscrew 5. By screwing in the wing screw 16, the cap 3 is fixed to the case body 2, and the filter 6 can be rotated about the set bolt 10 within the air cleaner case 1.

Clamping plates 7a, 8a of element clamping members 7, 8
Ring-shaped seal members 17 and 18 are respectively inserted into the gaps between the cap 3 and the bottom plate 2b to prevent air leakage. Peripheral wall 2 of case body 2
An air duct 19 tapered in the tangential direction is attached to a.

In the above configuration, when the engine is operated, dirty air 20 is sucked into the air cleaner case 1 from the air duct 19 due to the negative pressure generated in the engine. The dirty air 20 collides with the filter element 9 and sets the filter 6 on the set bolt 10.
The dust passes through the filter element 9 while being rotated in the direction of the arrow 22, and the dust is removed during this time, becomes clean air 21, flows into the filter 6 in a spiral shape, and enters the hole 4 of the air cleaner case 1.
Flows into the vaporizer 5 from there.

This idea houses a ring-shaped filter in a circular air cleaner case almost concentrically with the air cleaner case and rotatable around its axis, and an air duct for introducing air into the air cleaner case is placed almost tangentially to the peripheral wall of the air cleaner. Since the filter is mounted in the direction of the filter, the filter rotates under the dynamic pressure of the air flowing into the air cleaner case from the air duct while the engine is running. As a result, the dirt on the filter is evenly distributed around the entire circumference of the filter element, resulting in a longer filter inspection period, and the amount of clean air sucked into the engine is always maintained at an appropriate value corresponding to each engine operating condition. Since this is maintained, the engine can be operated with less fuel consumption.

[Brief explanation of the drawing]

Figure 1 is a front cross-sectional view of one embodiment of this invention (the third
Figure 2 is a cross-sectional view taken along the - line in Figure 1.
-A cross-sectional view is shown. FIG. 3 is a plan view of FIG. 1 with the cap removed. 1... Air cleaner case, 2... Case body, 3... Cap, 4... Hole, 5... Carburetor,
6...Filter, 19...Air duct.

Claims (1)

[Scope of utility model registration request] The top of the cylindrical case body, which consists of a circular bottom plate and a peripheral wall, is closed by a cap, and a hole communicating with the carburetor is provided in the center of the bottom plate.Inside the air cleaner case, there is a ring-shaped filter surrounding the hole. is housed almost concentrically with the air cleaner case and rotatable around its axis while maintaining airtightness between the cap and the bottom plate, and a peripheral wall of the air cleaner case has a structure for introducing air into the case. An air cleaner for an internal combustion engine, characterized in that an air duct is attached substantially tangentially to a peripheral wall.