DE1930690A1 - Internal combustion engine with a valve for venting the crankcase - Google Patents

Description

4890 Htrnt, 8000 Munich 23,

Frelllgrathstrasse 19 DJDl * ΙΠΟ RH B & hf Elsenacher Strasse 17

Postlach 140 f · »· · · PtL-M) W. beggar

Pit. App. H.rrmsnn-Tr.nt.pohl DIP i. - P hy 8. E d U a Γ d B 61ZI β Γ Telephone: 39 80 11

Telephone: 50930 ...,. ... .. _ .. 39 80 12

s is 62 Dlpl.-Ing. W. Herrmann -Trentepohl 39 so 13

Telegram address: PATENTANWÄLTE Telegram address: Bahr patents Harne Babetzpat Munich Telex 08 229 853 Telex 0524582 Bank accounts: Bayrische Vereinsbank Munich 952 Dresdner Bank AQ Herne 202 436

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JOHNSON PRODUCO) S, INC. 19306

Muskegon, Michigan, U.S.A.

Internal combustion engine with a valve for venting the

Crankcase

The invention relates to an internal combustion engine having a valve for venting the crankcase, and in particular is aimed at a new design of this valve.

The invention relates in one respect to a valve for Crankcase ventilation with a flexible tubular component which is flattened in one section in order to do this restrict gas movement from one end of the tubular member to the other end, the flattened one Part can open when there is a pressure differential between the crankcase and the atmosphere.

In other respects the invention relates to an internal combustion engine with a closed combustion chamber and with a sealed crankcase and with an intake manifold with a corresponding distribution system. Between

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the crankcase and intake manifold system extend cables. In these lines there is a control valve for regulating the flow through the lines. That The control valve comprises a flexible tubular member with open ends that forms part of the conduit. The flexible pipe component has a narrowed section which closes the line for the passage of the flowing gases when between the Atmosphere and the crankcase practically no pressure drop due to a vacuum at the inlet which tends to cause the Pump out the crankcase. The narrowed section leaves one Gas flow between the crankcase and the intake manifold system to when the pressure in the crankcase is above atmospheric pressure.

Crankcase exhaust vent systems are common known. Control valves for such systems and the systems themselves are described in U.S. Patents 3,159,150 and 3,189,012.

It became a simple but very effective control valve found that is particularly useful in exhaust gas systems for crankcases. The control valve includes a flexible tube that is flattened at a central section to create the connection between the ends of the flexible pipe normally interrupted.

Through various features of the invention, one can or more than one of the following or other tasks to solve.

The basic object of the invention is to provide a improved and simplified control valve for use in internal combustion engines with closed combustion chambers to accomplish.

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Another object of the invention is to provide a simplified regulated Entltiftungssystern for crankcases create, especially for sealed crankcases, in which the control with the help of the crankcase internal pressure ^ srheigefführung and where the pressure in the crankcase on a pressure geEäTtrexr-Tf? lr4 ^ _dj8r starting from a slightly levels above atmospheric pressure to such a range that slightly above atmospheric pressure Pressure is due to a corresponding adjustment of the sealing portion, the is slightly open or closed in its neutral position.

Other features, objects, and various advantages of the invention will be apparent to those skilled in the art A person skilled in the art from studying the description, the drawings and the appended claims.

According to the invention is an internal combustion engine with a Valve provided for venting the crankcase, the control valve in particular for internal combustion engines is intended with a sealed crankcase and with an intake manifold system. The control valve can be in a Line connecting the KurbeigeMuse to the inlet manifold system connects. The new control valve comprises a tubular component which is open at both ends and which is part of the Forms line and has a tapered section which closes the line by the action of the atmospheric Pressure acting on the outside of the conduit, with gas passage through this section, when there is essentially no pressure differential between the crankcase and the atmosphere. The spring action on the tubular member is such that the narrowed Section opens when the pressure differential between the crankcase and the atmosphere increases.

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The invention is explained in more detail below using an exemplary embodiment with reference to the drawings the drawings show:

1 shows a schematic representation of an internal combustion engine with a closed combustion chamber in a design according to the invention;

Fig. 2 is a sectional side view of a control valve according to the invention;

3 shows a view of the control valve in the closed position in section along the line III-III of FIG. 2;

FIG. 4 shows a view similar to that in FIG. 3 to show the control valve in the open position.

1 shows an internal combustion engine 10 with closed combustion chambers and with a system 12 for regulating the crankcase ventilation with a line section 14 which extends from the crankcase 16 of the machine. Also shown is a regulator 18 and a piece of conduit 20 extending between the regulator and the inlet manifold 22 of the machine. The pipe sections ¹ 14 and 20 and the controller 18 form a conduit which serves to guide the crankcase vapors to the intake manifold system "The crankcase of Haschine is preferably sealed from the atmosphere by use of a seal cap 24 to the filler neck 26, in a Manner shown in U.S. Patent 3,159,150.

The regulator 18 includes an end flange 28 on the conduit. 20 and an end flange 30 on the line piece 14. The end flanges hold a housing 32, which can consist of an etvarken wire mesh that is in the desired shape, for example

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has been wisely bent into the shape of a cylinder.

A rubber tube 34 connects the line piece 14 with the line piece 20. The rubber tube 34 is like a flattened, narrowed middle section 36. As shown in section in Fig., The narrowed middle portion is closed to allow the passage of gases from the line piece 14 and to prevent the pipe piece 20 when the pressure in the crankcase and in the atmosphere are substantially the same. The rubber tube 34 is rigidly supported by the housing 32 to prevent relative movement between the ends of the rubber tube.

In general, the rubber tube is designed in such a way that it opens when the pressure in the crankcase reaches a predetermined level Value exceeds, approximately the value of the atmospheric Pressure. Atmospheric pressure keeps the narrowed section of the rubber pipe closed when atmospheric pressure is in essentially corresponds to the pressure in the crankcase. This prevents the vacuum present in the intake manifold from attempting to evacuate the crankcase.

In certain circumstances it can be very beneficial though the rubber tube is so constructed or arranged that it is normally open at atmospheric pressure and closed at a level slightly below atmospheric pressure.

The constricted portion in the rubber pipe can be created by vulcanizing a rubber pipe with a constricted central portion. It is also possible to make the constriction by a separate, resilient mechanical clamp (not shown), which flattens a normally round tube and opens when pressure is released from the crankcase increases within the pipe.

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The flexible tube is preferably made of a rubber material or a rubber-like material, namely, for example, made of conventional natural or synthetic elastomer materials.

When the pressure in the crankcase increases as a result of the introduction of combustion gases into the crankcase as a result of imperfect sealing between the cylinders and the pistons reach, the pressure causes the opening of the constricted portion 36, whereby an open passage 38 is formed, so that the grass through the pipe section 20 and into the inlet? the machine, as shown in Fig. 4 .. As a result, the existing in the line piece 20 and caused by the inlet manifold vacuum acts as a receiving space for the gases that increase the pressure in the line piece 14 of the crankcase and thereby open the narrowed central portion 36, and so cause the pressure in the Can balance crankcase against the atmosphere. The valve is therefore normally closed and reacts to Opening pressures.

Patent claims:

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Claims (4)

Claims internal combustion engine with a valve for ventilation "" ■ —the crankcase in the version with a sealed one Crankcase and with an intake manifold system, with lines between the crankcase and the intake manifold system extend and the valve is designed as a control valve for these lines, thereby characterized in that the valve designed as a regulator (18) is a flexible valve that is open at both ends Comprises pipe section (34) which forms part of the lines (H, 20), the flexible pipe section (34) a narrowed Section (36) which essentially closes the line against the passage of grass when there is no pressure difference exists between the internal pressure of the crankcase and the atmospheric pressure and the pressure in the one-and-a-half manifold (22) is below atmospheric pressure, and the narrowed section (36) opens when the pressure in Crankcase (16) increases compared to atmospheric pressure. 2. Internal combustion engine according to claim 1, characterized characterized in that the narrowed portion (36) forms a flat part of a piece of pipe, the so is resiliently closed that when the Pressure within the pipe section (14) on the side of the crankcase (16) of the flattened part is lower as atmospheric pressure, the flattened part is closed to allow the passage of gases through the to prevent narrowed section (36) substantially. 3. Internal combustion engine according to claim 2, characterized in that one to the atmosphere constantly vented housing (32) the flexible pipe piece *. 8 909885/1090 (34) surrounds and is connected at both ends to the pipe section (34) in such a way that on the outside of the flexible Line the area between the flexible component (34) and the housing (32) is under atmospheric pressure. 4. Internal combustion engine according to claim 1, characterized in that a housing (32) is present is, which carries the flexible pipe section (34) in a rigid connection to a relative movement of the ends of the Avoid pipe section (34). 809 8 85/1090. BATH ORIGINAL,