# US 5,704,327 A · Intake pipe for an internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,327 A - Document ID: US5704327A - Status: Granted - Kind: A - Application number: 08/682,214 - Filed: 1996-07-17 - Granted: 1998-01-06 - Earliest claimed: 1994-05-05 - Assignees: Firma Carl Freudenberg - Inventors: Klaus Dohring - Web page: https://patentgrep.com/patent/US5704327A ## CPC - F02M 35/10321: {Plastics; Composites; Rubbers} - F02B 29/02: Other fluid-dynamic features of induction systems for improving quantity of charge (for also imparting a rotation to the charge in the cylinder F02B31/00) - F02D 9/12: having slidably-mounted valve members; having valve members movable longitudinally of conduit - F02M 35/10: Air intakes; Induction systems - F02M 35/10275: {Means to avoid a change in direction of incoming fluid, e.g. all intake ducts diverging from plenum chamber at acute angles; Check valves; Flame arrestors for backfire prevention} - F16K 15/026: {the valve member being a movable body around which the medium flows when the valve is open} - F16K 15/063: {the valve being loaded by a spring} - F05C 2225/08: Thermoplastics - Y02T 10/12: Improving ICE efficiencies - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F05C: INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An intake pipe of an internal combustion engine is disclosed. The intake pipe has a dimensionally stable intake pipe body with a passthrough opening, and a positioning element arranged in the passthrough opening to change the area of flow cross section. The positioning element is constructed of a nonreturn valve opening only toward the internal combustion engine, the nonreturn valve comprising a sealing element and a sealing seat which can move relative to one another and which can be brought, as required, into engagement with one another to close off the passthrough opening. ## Claims ### Claim 1 An intake pipe for an internal combustion engine, comprising: a dimensionally stable intake pipe body having a passthrough opening located therein; a positioning device arranged in the passthrough opening for changing the available flow cross section of the passthrough opening, said positioning device having a non-return valve openable only in the direction toward an internal combustion engine, the non-return valve comprising a sealing element and a sealing seat which can move relative to one another and which can be selectively brought into engagement with one another to close off the passthrough opening; and an actuating device for actuating the sealing element, the actuating device comprising a reciprocating element that is capable of axial reciprocal movement with respect to the sealing seat, said reciprocating element being guidingly surrounded by a web, and wherein the reciprocating element and sealing element are associated with one another by means of a spring element in a lossproof and resilient manner. ### Claim 2 (depends on 1) An intake pipe as set forth in claim 1, wherein the reciprocating element is connected to the positioning device. ### Claim 3 (depends on 2) An intake pipe as set forth in claim 2, wherein the positioning device is a servomotor. ### Claim 4 (depends on 2) An intake pipe as set forth in claim 2, wherein the actuation device is an electromagnet comprising: a coil joined in relatively immovable fashion to the web; and an armature rigidly joined to the sealing element. ### Claim 5 (depends on 4) An intake pipe as set forth in claim 4, wherein the armature and sealing element are associated in a lossproof manner with one another by means of a spring element which is resilient in the axial direction. ### Claim 6 (depends on 4) An intake pipe as set forth in claim 4, wherein the electromagnet is connected to a control unit in a signal-carrying manner. ### Claim 7 An intake pipe for an internal combustion engine, comprising: a dimensionally stable intake pipe body having a passthrough opening located therein; a positioning device arranged in the passthrough opening for changing the available flow cross section of the passthrough opening, said positioning device having a non-return valve openable only in the direction toward an internal combustion engine, the non-return valve comprising a sealing element and a sealing seat which can move relative to one another and which can be selectively brought into engagement with one another to close off the passthrough opening; and an actuating device for actuating the sealing element, the actuating device comprising a gas spring, the gas spring comprising: an enclosed gas space having a side that faces the sealing seat and to which an enclosed gas space pressure can be applied, said gas space being delimited on the side facing the sealing seat by the sealing element, which is joined in a gas-tight manner to adjacent delimiting walls by a membrane configured like a corrugated diaphragm, the delimiting walls and the web being configured integrally and continuously with one another. ### Claim 8 (depends on 7) An intake pipe as set forth in claim 7, wherein the web is provided with a bore configured to provide a pressure connection. ### Claim 9 An intake pipe for use with an internal combustion engine, the intake pipe comprising: a pipe body having first and second ends and a passthrough opening located in the pipe body; a valve openable only towards one of the ends of the pipe body, said valve comprising a sealing element and a sealing seat which can move relative to one another and which can be selectively brought into engagement with one another to close off the passthrough opening; a web extending from the inner wall of the intake pipe radially towards its center; and means for controlling the movement of the sealing element with respect to the sealing seat. ### Claim 10 (depends on 9) An intake pipe as set forth in claim 9, wherein the means for controlling the movement of the sealing element comprises a spring connecting the sealing element to the web. ### Claim 11 (depends on 9) An intake pipe as set forth in claim 9, wherein the means for controlling the movement of the sealing element comprises an axially reciprocal element located within the web; and a electromagnet for selectively moving the axially reciprocal element. ### Claim 12 (depends on 9) An intake pipe as set forth in claim 9, wherein the means for controlling the movement of the sealing element comprises a web extending from the inner wall of the intake pipe radially towards its center; a spring connected at one end to the sealing element; and a linkage for transferring an externally applied level of force to the sealing element via the spring. ### Claim 13 An intake pipe for an internal combustion engine, comprising: a dimensionally stable intake pipe body having a passthrough opening located therein; a positioning device arranged in the passthrough opening for changing the available flow cross section of the passthrough opening, said positioning device having a non-return valve openable only in the direction toward an internal combustion engine, the non-return valve comprising a sealing element and a sealing seat which can move relative to one another and which can be selectively brought into engagement with one another to close off the passthrough opening; and an actuating device for actuating the sealing element, the actuating device comprising a reciprocating element that is capable of axial reciprocal movement with respect to the sealing seat.