JPH0640352U - air cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide an air cleaner that can satisfactorily separate and liquefy oil mist and vaporized gasoline that flow back into the air cleaner and collect them. [Structure] A blow-by filter 4 is provided on the back side of a connector 3 that is connected to the engine side through a fresh air tube, and a 2 is provided between the connector 3 and the blow-by filter 4.
A hollow chamber S having the partition plates 5a and 5b described above is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an improvement of an air cleaner.

[0002]

[Prior art and its problems]

 Conventionally, an engine with a closed system that re-combusts blow-by gas generated on the engine side with intake air without opening it to the atmosphere has a structure as shown in Fig. 4, and the air cleaner 1 and the engine E are fresh air. When the engine E is in low load operation, the air sucked into the air cleaner 1 through the intake port 1a is passed through the fresh air pipe 2 as a positive flow to the engine E side, and is connected to the engine E side. During high-load operation, as shown in Fig. 5, blow-by gas flows back from the engine E side through the fresh air pipe 2 and flows into the air cleaner 1. This air cleaner 1 has a flat surface as shown in Fig. 2. As shown in the figure, a connector 3 to which the fresh air tube 2 is connected is provided in a protruding shape. Inside the connector 3, as shown in an enlarged view of a main part of FIG. The structure is such that the blow-by filter 4 that captures the by-gas is provided. In the conventional case, all the blow-by gas that flows backward when the engine E has a high load adheres to the blow-by filter 4, and when the engine E has a low load, Even then, there was a problem that oil in the blow-by gas that had adhered to the blow-by filter 4 did not return to the engine E side.

[0003]

[Means for Solving the Problems]

 The present invention has been devised in view of the above conventional problems, and an object thereof is not to provide an air cleaner capable of favorably returning the oil content in blow-by gas to the engine side, and the gist thereof is the engine side. An air cleaner having a connector capable of connecting a fresh air pipe communicating with the air cleaner and having a filter for capturing blow-by gas flowing back from the engine side through the fresh air pipe at the back side of the connector. A hollow chamber provided with two or more partition plates that can separate and collect the oil in the blow-by gas is provided between the filters.

[0004]

[Action]

 When the engine is under heavy load, vaporized substances such as blow-by gas and gasoline that flow back into the air cleaner from the engine side through the fresh air pipe collide with the partition plate inside the hollow chamber, and the oil component is separated by this partition plate. Only the gas component passes through the inside of the air cleaner and is sent to the intake manifold side.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged cross-sectional view taken along the line AA of the air cleaner 1 shown in a plan view in FIG. 2. The air cleaner 1 is provided with a connector 3 in a protruding shape, and the connector 3 communicates with the engine E side. The fresh air tube 2 is connected. A hollow hollow chamber S is formed on the inner side of the connector 3, and a blow-by gas filter 4 is mounted on the inner side of the hollow chamber S. A partition plate 5a which is erected from above and a partition plate 5b which is vertically provided from above are provided at predetermined intervals. Further, a through hole 6a is formed in the partition wall 6 on the inner side of the blow-by gas filter 4.

In such a structure, during high-load operation of the engine E as shown in FIG. 5, blow-by gas, vaporized gasoline and the like from the engine E side through the fresh air pipe 2 enter the air cleaner 1. Blow-by gas, etc., which has flowed into the hollow chamber S through the connector 3, collides with the partition plates 5a, 5b, and oil components adhere to the partition plates 5a, 5b to be separated and liquefied. Only the gas component is sent to the blow-by gas filter 4 side, and the gas component is returned to the engine E side through the through hole 6a via the intake manifold.

The number of the partition plates 5a and 5b may be further increased, and the oil components in the blow-by gas are satisfactorily separated and liquefied by the partition plates 5a and 5b, and the interior of the hollow chamber S is liquefied. When the engine E is operated at a low load, the fresh air sucked from the suction port 1a becomes a positive flow and is supplied to the engine E side, and is stored in the hollow chamber S together with the fresh air. The oil content can be returned to the engine E side satisfactorily.

Since the air cleaner 1 is installed in a portion that is not easily affected by the heat from the engine E, if the blow-by gas comes into contact with the partition plates 5a and 5b in the hollow chamber S, the effect of heat is exerted. The liquefaction of the oil component proceeds satisfactorily.

[0009]

[Effect of device]

 The present invention has an air connector having a connector for connecting a fresh air pipe communicating with the engine side and having a filter for catching blow-by gas flowing backward from the engine side through the fresh air pipe at the back side of the connector. In the cleaner, a hollow chamber provided with two or more partition plates that can separate and collect the oil in the blow-by gas is provided between the connector and the filter. By colliding the oil component and the like with the partition plate, the oil component can be favorably separated and liquefied and collected in the hollow chamber, and only the gas component can be reduced to the engine side.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view taken along the line AA of the air cleaner shown in FIG.

FIG. 2 is a plan configuration diagram of an air cleaner.

FIG. 3 is an enlarged cross-sectional configuration diagram corresponding to FIG. 1 of a conventional structure.

FIG. 4 is a schematic configuration diagram of a closed system engine at a low load.

FIG. 5 is a schematic configuration diagram corresponding to FIG. 4, showing a flow of blow-by gas when the engine has a high load.

[Explanation of symbols]

 1 Air Cleaner 1a Suction Port 2 Fresh Air Pipe 3 Connector 4 Blow-by Filter 5a, 5b Partition Plate E Engine S Hollow Chamber

Claims (1)

[Scope of utility model registration request] 1. An air cleaner having a connector capable of connecting a fresh air pipe communicating with the engine side, and having a filter on the back side of the connector for capturing blow-by gas flowing back from the engine side through the fresh air pipe. The air cleaner according to claim 1, wherein a hollow chamber provided with two or more partition plates capable of separating and collecting oil in blow-by gas is provided between the connector and the filter.