JPH03102011U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an example of an engine blow-by gas system according to the present invention together with the main parts of an engine to which it is applied, and FIG. 2 is a characteristic diagram for explaining the operation of the example shown in FIG. 1. It is a diagram. In the figure, 1...engine body, 11-16...cylinders,
17...Intake passage section, 18-23...Individual intake passage,
27... Common intake passage, 28A and 28B... Surge tank, 29A and 29B... Branch intake passage, 31
...first throttle valve, 32...second throttle valve, 33...third throttle valve, 34A and 34
B... Auxiliary branch passage, 35... Auxiliary common passage, 36...
Auxiliary intake passage section, 41A and 41B...Blowby gas outlet passage, 42...Common blowby gas passage,
43A and 43B...branch blow-by gas passage, 4
5 and 46...open/close valves.

Claims (1)

[Claims for Utility Model Registration] A plurality of separate intake passages are formed in the downstream portion of the intake introduction portion, and each of the plurality of branch intake passages is connected to a plurality of cylinders in the engine body. A plurality of branch blow-by gases respectively connected to the plurality of branch intake passages are connected to each individual intake passage included in a corresponding one of the plurality of individual intake passage groups formed by the passages. A blow-by gas passage section that introduces the blow-by gas generated in the engine main body through the passage, and a blow-by gas passage section that is provided in each of the plurality of branch blow-by gas passages, and when the engine main body is in a high-load operating state, the plurality of branch blow-by gas passages are provided. A blow-by gas device for an engine, comprising: a plurality of on-off valves that substantially close each gas passage;