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Blowby gas returning apparatus for engine with supercharger

A blow-by gas and return device technology, which is applied in the direction of machines/engines, engine components, mechanical equipment, etc., can solve the problems of not being able to return to the engine, and achieve the effect of easy piping operations

Active Publication Date: 2014-11-26
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the blow-by gas in the cylinder head cover may not flow to the intake passage through the second blow-by return passage, and may not return to the engine.

Method used

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  • Blowby gas returning apparatus for engine with supercharger
  • Blowby gas returning apparatus for engine with supercharger
  • Blowby gas returning apparatus for engine with supercharger

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] Hereinafter, a first embodiment of the blow-by gas returning device for an engine with a supercharger according to the present invention will be described in detail with reference to the drawings.

[0035] figure 1 An engine system including a blow-by gas return device of an engine with a supercharger in this embodiment is shown using a schematic structural diagram in . The engine system has a reciprocating engine 1 . An intake passage 3 is connected to an intake port 2 of the engine 1 , and an exhaust passage 5 is connected to an exhaust port 4 . An air filter 6 is provided at the inlet of the intake passage 3 . A supercharger 7 for boosting the intake air in the intake passage 3 is provided between the intake passage 3 and the exhaust passage 5 at a position downstream of the air cleaner 6 in the intake passage 3 .

[0036] The supercharger 7 includes a compressor 8 arranged in the intake passage 3 , a turbine 9 arranged in the exhaust passage 5 , and a rotary shaf...

no. 2 Embodiment approach

[0065] Next, a second embodiment of the blow-by gas returning device for an engine with a supercharger according to the present invention will be described in detail with reference to the drawings.

[0066] In addition, in each of the embodiments described below, the same reference numerals are assigned to the same components as those in the above-mentioned first embodiment, and description thereof will be omitted, and the description will focus on differences.

[0067] Figure 6 An engine system including a blow-by gas return device of an engine with a supercharger in this embodiment is shown using a schematic structural diagram in . In this embodiment, a vacuum control valve (VSV) 31 is provided in the vicinity of the injector 17 of the first blow-by gas return passage 18 instead of the check valve 29 of the first embodiment. The VSV 31 is controlled by an electronic control unit (ECU) 32 according to the operating state of the engine 1 . The configuration of this embodime...

no. 3 Embodiment approach

[0076] Next, a third embodiment of the blow-by gas return device for an engine with a supercharger according to the present invention will be described in detail with reference to the drawings.

[0077] Figure 8 An engine system including a blow-by gas return device of an engine with a supercharger in this embodiment is shown using a schematic structural diagram in . In this embodiment, the check valve 29 provided in the first blow-by gas return passage 18 in the first embodiment described above is omitted. Instead, the structure of the partitions 28A, 28B of the cylinder head cover 19 differs from the structure of the first embodiment.

[0078] Figure 9 The two partitions 28A, 28B in the cylinder head cover 19 are schematically shown in FIG. Such as Figure 9As shown, two different partitions 28A, 28B separated from each other are provided in the cylinder head cover 19 . Each of the partitions 28A, 28B includes an inlet 28a and a plurality of blades 28b arranged in a l...

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PUM

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Abstract

An upstream side and a downstream side of a supercharger (7) in the intake passage (3) are connected through a bypass passage (16) in which an ejector (17) is provided. An outlet of a first blowby gas returning passage (18) is connected to the bypass passage (16) through the ejector (17). An outlet of a second blowby gas bypass passage (22) is connected to the intake passage (3) downstream of a throttle valve (15). An inlet of the first blowby gas returning passage (18) and an inlet of the second blowby gas returning passage (22) are placed adjacent to each other in a head cover (19). A check valve (29; 31, 32) is provided in the first blowby gas returning passage (18).

Description

technical field [0001] The present invention relates to an engine with a supercharger which is installed on an intake passage and has a supercharger, and returns blow-by gas generated in the engine to the engine through the intake passage. blow-by gas return device. Background technique [0002] Conventionally, as such techniques, for example, techniques described in the following Patent Documents 1 to 4 are known. In particular, the blow-by gas returning device described in Patent Document 1 has a fresh gas introduction passage for introducing fresh gas from the intake passage into the cylinder head cover in an engine having a supercharger on the intake passage, for The 1st blow-by return passage for returning the blow-by gas accumulated in the crankcase to the engine when the supercharger is in operation and for mixing the blow-by gas accumulated in the cylinder head cover when the supercharger is not in operation The gas is returned to the engine's 2nd blow-by return pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01M13/00
CPCF01M13/022F01M2013/027F01M2013/026
Inventor 此原弘和
Owner AISAN IND CO LTD
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