JPH0536012U - Blow-by gas treatment equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably separate and recover the oil contained in blow-by gas. [Composition] The nipple 6 and the intake passage 11 on the downstream side of the throttle valve 11a are communicated by a communication passage 12,
The impeller 13 provided with 4 is provided in the communication passage 12, the oil contained in the blow-by gas is attached to the vane plate 14, and the oil is centrifugally separated by the rotation of the impeller 13 to separate and collect the oil contained in the blow-by gas. Surely.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blow-by gas processing device.

[0002]

[Prior Art]

 A conventional blow-by gas processing apparatus will be described with reference to FIG. FIG. 2 shows a sectional view of the head cover, and FIG. 3 shows an enlarged view of an arrow III portion in FIG.

In the figure, 1 is an engine cylinder head, and 2 is a sheet metal cylinder head cover. The cylinder head cover 2 is provided with a plug guide 3 for covering the spark plug, and an oil separator chamber 4 is provided inside the cylinder head cover 2 adjacent to the plug guide 3. The oil separator chamber 4 has a meandering passage 8 formed by a lower plate 5 made of sheet metal, and blow-by gas is discharged to the outside through the meandering passage 8. Reference numeral 6 is a nipple for discharging blow-by gas. An oil seal 7 is attached between the plug guide 3 and the cylinder head cover 2.

The blow-by gas flowing into the oil separator chamber 4 is discharged from the nipple 6 through the meandering passage 8 and introduced into an intake system (not shown). The oil contained in the blow-by gas adheres to the wall surface of the lower plate 5 while passing through the meandering passage 8 to separate the oil from the blow-by gas.

[0005]

[Problems to be solved by the device]

 Since the cylinder head cover 2 and the lower plate 5 are made of sheet metal, there is a gap between the inner wall of the cylinder head cover 2 and the vertical wall of the lower plate 5, as shown in FIG. Therefore, the blow-by gas containing oil was directly discharged through the gap without passing through the oil separator chamber 4, and the oil could not be separated sufficiently.

[0006]

[Means for Solving the Problems]

 According to the configuration of the present invention for solving the above-mentioned problems, a blowby gas outlet opening to the outside is provided in the head cover of the engine, and the downstream side of the throttle valve of the intake passage and the outlet are communicated with each other by a communication passage. An impeller provided with a vane plate to which the oil contained in is attached is provided in the middle of the communication passage, and an oil recovery unit for recovering the oil centrifugally separated by the rotation of the impeller is provided.

[0007]

[Action]

 The blow-by gas is guided to the communication passage by the negative pressure, and the impeller is rotated to attach the oil contained in the blow-by gas to the blade plate. The oil is centrifuged by the rotation of the impeller and collected in the oil recovery unit.

[0008]

【Example】

 FIG. 1 shows a schematic configuration of a blow-by gas processing apparatus according to an embodiment of the present invention. The same members as those shown in FIGS. 2 and 3 are designated by the same reference numerals, and duplicate explanations are omitted.

The cylinder head cover 2 is provided with a nipple 6 as an outlet for blow-by gas. The downstream side of the throttle valve 11a of the intake passage 11 and the nipple 6 are connected by a communication passage 12, and the blow-by gas is guided to the intake passage 11 by negative pressure. An impeller 13 is provided in the middle of the communication passage 12, and the impeller 13 is provided with a vane plate 14 for adhering the oil contained in the blow-by gas. The impeller 13 is covered with an oil recovery unit 15, and the oil recovery unit 15 communicates with an oil pan (not shown).

The blow-by gas is guided to the communication passage 12 by the negative pressure, and the impeller 13 rotates. The oil contained in the blow-by gas adheres to the blade plate 14 of the impeller 13, is separated by the centrifugal force by the rotation of the blade wheel 13, and is recovered in the oil recovery unit 15. The oil recovered by the oil recovery unit 15 is returned to the oil pan.

Therefore, the oil contained in the blow-by gas can be reliably separated and collected.

[0012]

[Effect of the device]

 In the blowby gas treatment apparatus of the present invention, the blowby gas outlet and the intake passage are connected by a communication passage, and an impeller equipped with a blade plate is provided in the communication passage. It is possible to centrifuge the oil by attaching it and rotating the impeller. As a result, the oil contained in the blow-by gas can be reliably separated and recovered.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a blow-by gas processing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an engine head cover.

FIG. 3 is an enlarged view of an arrow III portion in FIG.

[Explanation of symbols]

 1 Cylinder Head 2 Cylinder Head Cover 6 Nipple 11 Intake Passage 11a Throttle Valve 12 Communication Passage 13 Impeller 14 Impeller 15 Oil Recovery Section

Claims (1)

[Scope of utility model registration request] 1. A blade for providing blow-by gas outlet opening to the outside in a head cover of an engine, connecting a downstream side of a throttle valve of an intake passage and the outlet through a communication passage, and adhering oil contained in the blow-by gas. A blow-by gas treatment apparatus comprising an impeller provided with a plate in the middle of a communication path, and an oil recovery unit for recovering centrifugally separated oil by rotation of the impeller.