JPS606595Y2 - Blow-by gas reduction device - Google Patents

Description

[Detailed explanation of the invention] In vehicles equipped with an engine such as automobiles or motorcycles, the oil and moisture separation chamber of the blow-by gas reduction device and the moisture separation chamber of the air cleaner are usually provided separately.) Therefore, extra space was required to install both separation chambers, the number of assembly steps was large, and maintenance was complicated.

The present invention relates to an improvement of a blow-by gas return device that eliminates these drawbacks, and includes a first port that communicates with the air intake passage side on the minus side, and a first port that is located below the port and connects to the engine crankcase. (If a second port is provided for communication)
It is characterized by having a separate chamber on the other side with a third port that communicates with the lower part of the air cleaner.The purpose of this is that it requires only a small space for installation, is easy to maintain, and is inexpensive. The aim is to provide an inexpensive blow-by gas reduction device.

As described above, in this case, the first port communicates with the air intake passage on one side, and the second port is located below the port and communicates with the engine crankcase. (A separation chamber is provided with a third port on the side that communicates with the lower part of the air cleaner.) Therefore, the blow-by gas generated in the crankcase of the engine is discharged from the second port into the separation chamber, and the blow-by gas is discharged from the second port into the separation chamber. Liquid components such as water and oil in the gas are separated and removed in the same separation chamber, and the blow-by gas from which the liquid component has been removed is sucked into the air suction passage side from the first port, thus causing the blow-by gas to be released into the atmosphere. Air pollution is prevented.

Further, in the present invention, moisture in the intake air collected by the air cleaner is separated into the separation chamber via the third port.

According to this proposal, the blow-by gas separation chamber and the air cleaner separation chamber can be integrated into one, reducing the number of parts and assembly man-hours, greatly improving productivity and reducing costs. It becomes possible.

Furthermore, in the present invention, blow-by gas waste liquid treatment can be done in one place, making maintenance extremely easy.

The illustrated embodiment in which the present invention is applied to a motorcycle will be described below. Reference numeral 1 denotes a frame. An engine (not shown) is mounted in front of a pair of left and right center frames 2 of the frame 1, and an engine (not shown) is mounted behind the engine. An air cleaner 4 is attached to an upper frame 3, sandwiched between a pair of left and right center frames 2.

Further, a separation chamber 5 is disposed adjacent to the diagonally lower front of the air cleaner 4 and is biased to the right, and a rib 5b protruding from the upper wall thereof.
The separation chamber 5 is fixed by binding the rib 4b hanging down from the air cleaner side, and the separation chamber 5 has a shape 5a whose front part bulges upward.

Further, in the upper part of the upper bulging part 5a of the separation chamber, there is a first opening which communicates with an intake passage part 4a through a communication pipe 9 and which communicates with an engine (not shown) through an intake pipe 15 and a carburetor 16.
A port 6 is provided, and a second port 7 is provided directly below the port 6 at a predetermined interval, and the second port 7 is communicated with a crankcase of an engine (not shown) via a blow-by gas pipe 10. There is.

Furthermore, a third port 8 is provided at the upper end of the rear wall of the separation chamber 5.
The third port 8 is communicated with the bottom opening 11 of the air cleaner 4 via a communication pipe 12.

Moreover, a discharge pipe 13 is connected to the bottom of the separation chamber 5, and a stopper 14 is detachably attached to the lower end of the discharge pipe 13.

Since the illustrated embodiment is configured as described above, blow-by gas from the crankcase of the engine (not illustrated) flows into the separation chamber 5 via the blow-by gas pipe 10 and is separated into water, lubricating oil, and gas. , moisture, lubricating oil, etc. are stored at the bottom of the separation chamber 5, and the gas separated into the upper expansion chamber 5a of the separation chamber is supplied from the first port 6 to the intake section 4a of the air cleaner 4 via the communication pipe 9. be done.

Further, the water separated by the air cleaner 4 flows into the separation chamber 5 from the bottom opening 11 through the communication pipe 12, and is mixed with the separated water, lubricating oil, etc. in the blow-by gas pipe 10, and stored.

Therefore, waste liquid treatment can be easily done in one place, and maintenance is easy.

Furthermore, since one separation chamber can serve as both the blow-by gas separation chamber and the air cleaner separation chamber, installation space is reduced, and the vehicle body can be made smaller and lighter.

Furthermore, the number of assembly steps can be reduced, productivity can be greatly improved, and costs can be reduced.

Further, an upper bulging portion 5a is formed in the separation chamber 5, and the bulging portion 5a is formed in the separation chamber 5.
(A) is provided with a first port 6 that communicates with the air cleaner 4 and a second port 7 that communicates with the engine crankcase.
Even if most of the volume in the separation chamber 5 is occupied by moisture, lubricating oil, etc., both the recording ports 6 and 7 can maintain communication with each other, so that the blow-by gas can be separated reliably over a long period of time. be able to.

Furthermore, since the second port 7 that discharges from the engine crankcase to the separation chamber 5 is located below the first port 6 that leads to the air cleaner 4, separation from liquids such as gas moisture and lubricating oil is ensured. can be done.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view illustrating an embodiment of the blow-by gas reduction device according to the present invention, and FIG. 2 is a front view thereof. DESCRIPTION OF SYMBOLS 1...Frame, 2...Center frame, 3...Upper frame, 4...Air cleaner, 4a...Suction passage section, 4b ...
...Rib, 5...Separation chamber, 5a...
Swelling portion, 5b...Rib, 6...First port, 7...Second port, 8...Third
Port, 9...Communication pipe, 10...Blow-by gas pipe, 11...Air cleaner bottom opening, 12...Communication pipe, 13...・Exhaust pipe,
14...Bung, 15...Engine intake pipe, 16...Carburetor.

Claims (1)

[Scope of utility model registration request] When a first port that communicates with the air intake passage side on one side and a second port that is located below the port and communicates with the engine crankcase are provided, both of the ports communicate with the lower part of the air cleaner on the other side. A blow-by gas reduction device characterized by having a separation chamber provided with a communicating third port.