TW533269B - Blow-by gas recirculation system for internal combustion engine - Google Patents

Abstract

In an intake system of an internal combustion engine comprising a carburetor and an air cleaner disposed on the upstream side thereof which are connected to each other by a connecting tube, to simplify the structure of supporting a gas-liquid separation chamber of a blow-by gas recirculation means by the connecting tube and the structure of a communication passage between the connecting tube and the gas-liquid separation chamber. Two support portions 25 and 26 are provided integrally with a connecting tube TC for connection between an air cleaner AC and a carburetor CA, and one 25 of them is made to function also as a communication passage 25a for communication between the connecting tube TC and the gas-liquid separation chamber 29.

Description

533269 V. Description of the invention (1) [Detailed description of the invention] [Technical field to which the invention belongs] The present invention relates to an air intake system of an internal combustion engine for a vehicle such as a motorcycle, and the like. Leakage recirculation device of an internal combustion engine circulating back to its intake system. [Known technology] In the intake system of an internal combustion engine for a two-wheeled vehicle, the crankcase of the internal combustion engine and an air-fuel mixture generating device are provided between the intake passages upstream of the gasifier. It is used to communicate with these internal leakage gas recirculation paths. The internal leakage of the internal gas is recirculated to the air intake system through the operation of the internal combustion engine, and the internal combustion engine re-burns the leakage to suppress the leakage of air pollution to the atmosphere and cause leakage of atmospheric pollution. Gas recirculation devices have been known for a long time (refer to Japanese Patent Publication No. Sho 5 5-6 0 4 38). In addition, for internal combustion engines for motorcycles, in order to simplify the structure, miniaturization, shortening, etc., a gasifier and an air cleaner device disposed upstream of the gasifier are directly connected by a connecting pipe, and the connecting pipe is connected to the pipe. A gas leak recirculation device that opens an upstream portion of the gas leak recirculation passage and communicates with the gas leak generator of the internal combustion engine is also known. [Problems to be Solved by the Invention] However, in this leaking gas recirculation device for an internal combustion engine, the leaking gas recirculation mechanism is supported in the communication path connecting the air filter and the carburetor, and the leaking gas is also communicated in the communication path. The device at the exit of the circulation mechanism is required to simplify its supporting structure and such connecting structures, and at the same time, its supporting and connecting operations need to be simple.

C: \ 2D-C0DE \ 91-05 \ 91105043.ptd Page 5 of the fifth description of the invention (2) _____________ Therefore, < 管 A. Pipe connection connection in series configuration 2 = elbow-like connection from the bend Connect the air filter and the carburetor in the rear direction of the tube core, and open the loop path to connect and select = 2 upstream part of the pain loop path. At the same time, it is replanted in the curved 4 to 2 recirculation device of the connection tube. Provide — Support structure can be easily = curved wall on the outer side. With simple structure, the support part can double the upstream path of the gas recirculation path. At the same time, the path to meet the above requirements is to connect the tube and leak gas recirculation. The gas that flows into the connecting pipe and flows into the connecting pipe "in addition" In the connecting pipe, you can seek the promotion ratio (A / F)-a fixed% and a mixture of air and air. [Methods to solve the problem], "Internal combustion engine" Air leakage recirculation device. In order to achieve the aforementioned object, the invention of the first aspect of the patent scope is connected to the air by a connecting pipe, and the upstream air filter 椹 t mixture generator and the connecting pipe are characterized by the aforementioned characteristics. In the intake system of the internal combustion engine, it is curved into an elbow-shaped tube, which is bent far away, and its connection portion on the air filter side is bent. It is designed to support the leakage of the outer surface of the outer curved wall: One of the support sections in this support section is the support section of the upstream section of the structure. The connection between the circulation mechanism and the connecting pipe is also used as the upstream of the gas leakage and recirculation mechanism: According to this feature, according to the link management department, it is not necessary to maintain the structure and connection in the A of the link camp, in order to achieve the copy of the document and the upstream is' in the aforementioned patent application Fanxin V, please be conscientious. The characteristics of the garden are as follows: Leakage of the gas is followed by five. Explanation of the invention ~~~~~~~~ The connecting pipe can be two, the gas-liquid separation chamber of the gas, the root and the connected ir The gas-liquid separation of the leaked gas recirculation mechanism is based on the structure of the a-way structure of the mechanism. In addition, in order to make the separation structure in the support structure of the connecting socket very simple, no other supporting member ring is necessary. In order to make the aforementioned :, the connecting pipe of the third item of the patent scope of the present application is "! Please enclose the first item ', which is characterized in that two support parts are formed in the limbs. Upstream section, # ί 忒 寺 Support ° 卩 Directly elastically supports the upstream section of the air leak recirculation mechanism 3 :; Features, according to the connection tube can simplify the leak and then uncover the ring Ξ The connection tube has a bomb; the structure of the equal communication path is profitable, in order to construct the structure, and its supporting operation is not; Jane: the mounting mechanism 'do not support other Among the items 1, 2 or 3, the invention of item 4 is that in the scope of the patent application and the connecting line of the connecting pipe, the outer part of the connection part of the recirculation mechanism used to communicate the leak is curved, The open end on the side is, >; σ means another curved opening. According to this feature, it can be = the inner wall surface, and at the same time, it has the same effect as the upstream directional opening term. Or 3 When the leaked gas is ejected, as a result, the flow rate of the suction chamber gas in the connection pipe becomes faster, helping both the air and the fuel: the mixture of the inhaled air and the radon is promoted, and there is [invented implementation form ^] 5 gas Certainization of the ratio. Hereinafter, each and every embodiment of the present invention will be described. Steam & Form

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533269

Device implementation: :: In the internal combustion engine of the invention of the invention 2 and during the recirculation of air leakage, "When the internal combustion engine is lifted up and down ™, the following directions will be i left and right" and "front" "After" is a diagram of an internal combustion engine equipped with a leakage recirculation device of the present invention by a self-propelled motorcycle. Fig. 5 is a sectional view, and Fig. 4 is a sectional view taken along line 4-4 of Fig. 2. 5 is a cross-sectional view taken along line 5-5 of ^ 2, and FIG. 6 is a cross-sectional view taken along line 6_6 of FIG. 3, and the head tube liver at the front end of the body frame F of the frame / wheel can be turned Λ and 1 = Chengqian and 2 'At the front and bottom of the front 2 axle support, the rear ΛΙΐ m of the vehicle body frame F is interlocked: in: the second body frame f_l is equipped with the fuel tank and the upper body frame F is moved earlier It is equipped with a seat s. Y, = tilted posture above the rear wheel WR, and behind it is equipped with the air leakage recirculation of the present invention, the exhaust ports 11 that are opened are connected in two: 1 0 are connected as air fuel mixed on the upstream side The cylinder unit 8 of the aforementioned internal combustion engine E is an intake port 10 opened, an intake system IN of a connected device, and an exhaust system EX connected to the exhaust system EX. The aforementioned intake system IN is , And the gasifier CA of the aeration gas generating device and

533269 V. Description of the invention (5) AC: It is arranged in series in the front-rear direction of the car body frame. These curves are connected by elbow-shaped connecting pipes. As shown in Figs. 2 to 6, "The filtration of the aforementioned air filter κ = the box body 13a and the lid body i3b-shaped duplex which closes the opening thereof," and a ring-shaped filter is housed inside.清 器 机构 丨 4. The two elements 14 are formed by the shape-retaining member Hb of the annular porous foam 14a, which is composed of a plate. X, this; second; the condition 14 is to make the inside of the filter box 13… and. . Where: [Tru. On the rear wall of the filter box " I ::; :: 1, the working gas passage 20, through which the air is connected to the air. In addition, on the side of the filter, Qiaole side 15 is connected to most of the opening-out: 18, here: the wall ', that is, at the end of the middle swimming side of its cover body 1 3b, its exit〗 8 318 可A filter 21 composed of a mesh plate is attached to the detachable fitting connection pipe TC. I connection pipe TC is provided with a connection pipe T c in its connecting portion. It is formed of rubber, as shown in FIGS. 2 and 4, the connection I to the inlet of the filter box 1 3, the upstream side stands up, that is, the shape, the upstream end portion from the number "#_ ,, is formed as The pretty curved shape LOH faces the gasifier: rice: the end of the bow side is tied to the gasifier ca at the entrance of the gasifier ca extending linearly, and its down stream is in the aforementioned rubber connecting pipe Tc t bundle, 22 Linked. The upstream portion of the gas recirculation mechanism RB is provided with a support leakage indicator on the upper side of the upper side, and a rubber-made connection portion 24 is provided. That is, as shown in Figs. 4 and 5, there is a space behind the body-the body is provided with the first curved portion and the outer curved wall of the turning portion, and the front 1 support portion 25 'is formed with the end support portions 25, 26. The aforementioned & shape is formed in its interior is c: \ 2D-CODE \ 9l-〇5 \ 91105043. Ptd $ 9 pages 533269 V. Description of the invention (6)-The communication path 25a for leaky gas recirculation, The second support portion 26 is a knob portion 26c having a ring-shaped groove 261 integrally formed on the outer end of the wheel-shaped solid protruding portion 26a. The first and second support sections 25 and 26 are support sections 24 constituting the leaky gas recirculation mechanism RB. The leakage gas recirculation mechanism RB is configured to be connected to the inlet 29a of the closed gas-liquid separation chamber 29 at the downstream end of the leakage gas recirculation path 28, and an outlet is provided at the upper part of the gas-liquid separation chamber 29. 29b. Further, on the other side, a mounting tongue 29c is integrally provided, and an insertion hole 29d is opened in the mounting tongue 29c. The outlet 29b is inserted into the first support portion 25, and if the insertion hole 29d of the mounting tongue 29c is inserted into the annular groove 26b of the second support portion 26, it can be outside the connecting tube TC The upstream part of the curved wall that can support the leaky gas recirculation mechanism RB can be attached and detached, that is, the gas-liquid separation chamber 29 can be supported, and the gas-liquid separation chamber 29 can be connected to the connecting pipe τ c. The downstream part of the leakage gas recirculation path 28 is the leakage vent of the internal combustion engine E, and is connected to the upper part of the crank case (see 1). The downstream end of the connecting pipe TC is connected to the gasifier cA. Entrance. Since the aforementioned gasifier CA is a well-known gasifier, the description thereof is omitted. Next, the effect of the embodiment will be described. Now, if the internal combustion engine E is operated, the atmosphere is drawn into the air cleaner AC through the air passage 20 due to the negative intake air pressure occurring in the intake system IN. The air sucked into the air filter AC as shown by arrows 3 to 5 is from the polluted side 15 through the filter element 14 and then immediately flows into the purification side; i 6 passes from there filter

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V. Description of the invention (7) 2 1 After being filtered twice, it flows into the gasifier c A through the connecting pipe TC, and the resulting air-fuel mixture is attracted to the combustion chamber of the internal combustion engine E and is quilted. The combustion is performed and the internal combustion engine E is operated. A few minutes The gas leak generated by the operation of the internal combustion engine E flows into the gas-liquid separation chamber 2 9 from the crank chamber through the gas leak recirculation path, where the droplet is passed through.

The leaked gas is circulated to the connecting pipe τ c, and the gas is sucked in from there. CA ϋ 族 CA Then, the gas-liquid separation chamber in the upstream part of the leaky recirculation mechanism RB is integrally provided with the curved connecting part of the rubber connecting pipe Tc. The first and second supports outside the curved wall are integrated. The support unit 25 is also used as a leaky communication path 25a. Therefore, by connecting it, the support structure of the leaky gas recirculation mechanism RB can be simplified and the communication, The structure, again, it is not necessary to operate the other supporting gas leakage recirculation mechanism RB in the connecting pipe TC, that is, it is possible to simply read y and the component to support the i-th support portion 25 of the TC to the formed leakage a = Ding. In addition, by connecting, the opening # inside the pipe is curved along its outer side: the connecting pipe TC of 辟 a is oriented upstream of it, and the pipe Tc and the soil can be connected at the same time. As a result, the sucking to the lice can be promoted, and the flow rate becomes faster, which contributes to the air-fuel mixture ratio (A / Ι? Λ, mixing of milk and air leakage. As long as the embodiments described above are also described in this example, the present invention is not limited to various embodiments. Within the scope of the patent application of χ, for example: the foregoing embodiments, although the internal combustion engine for a motorcycle is described Situation, but = lice recycling device implemented in Tian Ran can also make this device practical

^^ 269 V. Description of the invention (8) Guan Zhi: the internal combustion engine order of vehicles, etc., and the ancient parts :: the support department of the recirculation mechanism, although the option: the body is set in the connection =; ,,, ::: With the first】 or the first heart. … 1 can also be used as a gas leak ^ In the [effect of the invention] gas leakage iiίΐ In the invention / direction% device of the first patent scope of this application, according to the connection n sun and moon ' Second connection of equal communication path: Γ component and its support operation is very unnecessary Other support structure gas: According to the second item of the patent scope of this application = recirculation% device, according to the connection pipe month, in the internal combustion engine Leakage Γ; Ϊ1's 5-hold structure and other communication components of the 路: Zi still ring the structure of other supporting components, and the gas-liquid separation chamber does not need to be further. It is very simple to recruit and store staff. The leak of the asset is still installed i: Please invent the invention, in the internal combustion engine tube for a flexible passage structure, and 'connecting other supporting members, and A = upstream of the recirculation mechanism, unnecessary, The root is too simple, and the support operation is very simple. The f4 item in the gas recirculation device indicates that it has the same effect as the missing item of the internal combustion engine, and the patent application scope No. 1, 2 or 3 describes the air intake in the connecting pipe -------- 81 \\ 312 \ 2d-code \ 91-〇5 \ 9]] 〇5〇43.

Ptd Page 12 533269 V. Description of the invention (9) The leaked air is ejected, and the result is to promote the mixing of the inhaled air and the leaked air, which helps to stabilize the air / fuel mixture ratio (A / F). [Description of component numbers] 1 head tube 2 front fork 3 steering handle 4 rear bumper 5 output shaft 6 chain transmission mechanism 8 cylinder section 10 air inlet 11 exhaust port 13 air cleaner box 13a box body 13b cover 14 Filter element 14a Porous foam 14b Conformal member 15 Pollution side 16 Purification side 17 Inlet 18 Outlet 20 Air channel 22 Belt

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V. Description of the invention (10) 24, 25, 26 Supporting part 2 5a Flow path 26a Protrusion 26b Ring groove 26c Knob part 28 Leakage recirculation path 29 Gas-liquid separation chamber 29a Into P 29b Out V 29c Install tongue 29d Insertion hole AC air filter, cleaner CA, carburetor TC connecting pipe RB Leakage recirculation mechanism UD drive unit F Body frame S Seat E Inner machine EX Exhaust system IN Intake system C: \ 2D-C 〇DE \ 91-05 \ 91105043.ptd Page 14 533269 Brief Description of Drawings Fig. 1 is an overall side view of a motorcycle equipped with an internal combustion engine equipped with a leakage gas recirculation device of the present invention. Fig. 2 is a side view of the leakage gas recirculation device. Fig. 3 is a sectional view taken along line 3-3 of Fig. 2. Fig. 4 is a sectional view taken along line 4-4 in Fig. 2. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 2. Fig. 6 is a sectional view taken along line 6-6 in Fig. 2.

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Claims (1)

533269 VI. Scope of patent application 1 · An air leakage recirculation device for an internal combustion engine, which uses a connecting pipe (TC) to connect an air fuel mixture generator (CA) and an air filter (AC) arranged on the upstream side thereof The air intake system of an internal combustion engine formed by) is characterized in that: the connecting pipe (TC) is formed by a V-shaped elbow-shaped connecting portion of the air cleaner (AC) side, and is bent outside the curved connecting portion Outside the wall, a plurality of support sections (25, 26) are integrally provided to support the air leak recirculation mechanism (RB). One of the support sections (25, 26) is also used as 2 that connects the leaking gas recirculation mechanism (RB) and the connecting pipe (Tc) · The leaking gas recirculation device for an internal combustion engine, such as the item 1 of the patent application scope, wherein the upstream part of the leaking gas recirculation mechanism (RB) is leaking \ Leaving the room (2 9). ^ Course-like knife 3 · If the leaking recirculation of the internal combustion engine is applied for the item No. 丨, the connection tube (TC) is made of an elastomer such as rubber and a plurality of support parts (25 , 26), and directly and elastically support the upstream part of the gas leak recirculation mechanism (RB) on such branches 26). Λ such as Π special: Leakage recirculation equipment for internal combustion engines in the scope of items 1, 2 or 3, wherein the connecting pipe (TC) is used to communicate the leaky recirculation mechanism (RB) and its communication path (25a). The open end on the side is the inner wall surface of the curved wall along the outer side of the curved joint of ° s, and at the same time upstream ^ to the bow port 0 C: \ 2D-CODE \ 91-05 \ 91105043.ptd Page 16