JPH0640353U - air cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an air cleaner that can satisfactorily collect oil in blow-by gas that flows backward from the engine side and can satisfactorily return it to the engine side. [Structure] A connector 3 that can be connected to a fresh air pipe communicating with the engine side is provided, and a filter 4 is provided behind the connector 3.
A hollow chamber S capable of separating and collecting the oil in the blow-by gas is formed between the connector 3 and the filter 4.

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 at the inner side of the connector for trapping blow-by gas flowing back from the engine side through the fresh air pipe. An intermediate chamber capable of separating and collecting the oil in the blow-by gas is provided between the filters.

[0004]

[Action]

 There is a hollow chamber between the connector and the filter in the air cleaner. The oil component of blow-by gas is separated inside the room, and the oil is stored in the hollow chamber.When the engine has a normal flow when the load is low, the oil accumulated in this hollow chamber is satisfactorily refreshed to the engine side. Can be returned to.

[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 FIG. 2, in which an air cleaner 1 is provided with a connector 3 to which a fresh air tube 2 can be connected in a protruding shape. A hollow hollow chamber S communicating with the connector 3 is formed, and a blow-by filter 4 is provided on the inner side of the hollow chamber S via a partition wall 5 having a through hole 5a.

In such a structure, the blow-by gas generated from the engine E side during high-load operation of the engine flows into the air cleaner 1 through the fresh air tube 2, but passes through the connector 3 and inside the hollow chamber S. The blow-by gas that flows into the cylinder collides with the wall surface of the hollow chamber S, and the oil in the blow-by gas is separated by this wall surface and adheres to the wall surface. In particular, the air cleaner is affected by the heat from the engine E. Since it is installed in a small number of parts, it is not easily affected by heat, and the oil component in the blow-by gas is satisfactorily separated and liquefied in this hollow chamber S and stored in the hollow chamber S. Therefore, the gas component from which the oil in the blow-by gas is removed flows back to the filter 4 side through the through hole 5a.

When the engine E is operated under a low load in this state, the fresh air sucked from the suction port 1a of the air cleaner 1 passes from the inner chamber 1b of the air cleaner 1 through the filter 4 and the through hole 5a. The oil accumulated in the hollow chamber S is returned to the fresh air tube 2, and the oil is favorably returned to the engine E side together with the fresh air flowing in the fresh air tube 2.

In this way, in this example, since the oil in the blow-by gas is favorably collected in the hollow chamber S, all the oil in the blow-by gas does not adhere to the filter 4 as in the conventional case, The oil content in the blow-by gas can be satisfactorily reduced to the engine E side.

[0009]

[Effect of device]

 The present invention has an air connector that has a connector that can connect a fresh air pipe communicating with the engine side and that has a filter on the back side of the connector that captures blow-by gas that flows back from the engine side through the fresh air pipe. The cleaner has a hollow chamber between the connector and the filter that can separate and collect the oil in the blow-by gas. It has the effect that it can be separated and collected satisfactorily and that the collected oil can be satisfactorily returned to the engine side together with the fresh air when the engine load is low.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional configuration diagram around a blow-by filter in an air cleaner.

FIG. 2 is an overall 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 5 Partition 5a Through Hole E Engine S Hollow Chamber

Claims (1)

[Scope of utility model registration request] 1. An air having a connector capable of connecting a fresh air pipe communicating with the engine side, and having a filter for trapping blow-by gas flowing backward from the engine side through the fresh air pipe at the back side of the connector. An air cleaner comprising a hollow chamber between the connector and the filter, which is capable of separating and collecting oil in blow-by gas.