Abstract: The present disclosure generally relates to a removable enclosure for a mobile negative pressure wound therapy (NPWT) device, where the enclosure is arranged to reduce unwanted noise from a pump comprised with the negative pressure pump. The enclosure is specifically useful when operating the NPWT device during nighttime.

Abstract: An embodiment variable valve device of a vehicle intake system includes a variable valve housing fixed to a housing of an air cleaner and including a valve passage penetrating the air cleaner, a variable valve flap rotatably coupled to the variable valve housing and configured to perform opening and closing operations based on an intake negative pressure of an engine to open and close the valve passage, and a cam protrusion and a leaf spring provided on the variable valve flap and the variable valve housing, respectively, wherein the cam protrusion and the leaf spring are in contact with each other.

Abstract: An air cleaner includes a case having an internal space, a filter element capable of partitioning the internal space into a first space and a second space, an intake port that introduces an air into the first space therethrough, an exhaust port that discharges an air from the second space, and at least one baffle part projecting toward the filter element from an inner surface of the case. The baffle part diffuses the air introduced into the first space and introduces the air to the filter element. The baffle part includes a widened baffle part. The widened baffle part includes a guide section extending along an extending surface of the filter element and a widened section larger in width than the guide section.

Abstract: The invention relates to an air cleaner housing (200) for an air filter for an internal combustion engine in a vehicle, the air cleaner housing (200) being adapted for attachment to an outer cover (100) of said internal combustion engine (100), and comprising an inlet (201) for receiving unfiltered air and an outlet (202) for outputting filtered air. The air cleaner housing (200) comprises at least one slide member (210) configured to be slidably arranged to a corresponding guide member (110) of said outer cover (100), such that, when said slide member (210) is in connection with said guide member (110), said air cleaner housing (200) is supported by said guide member (110), and said air cleaner housing (200) is slidably movable at least along said guide member (110); and a fixation member (220) configured to secure the housing (200) to the outer cover (100) in a fixed position along said guide member (110). The invention also relates to an air cleaner housing arrangement, a method, and a vehicle.

Abstract: An intake swirl gasket is disclosed herein. It is installed between a cylinder head and an intake manifold and comprises plural airflow holes for respectively communicating with plural intake passages of the cylinder head; and plural diversion devices respectively disposed in the plural airflow holes and each having an axis and plural splitter blades extended from the axis for connecting to an inner wall of each of the plural airflow holes, wherein each of the plural splitter blades is shaped as an arc to form a recessed surface towards the intake manifold at one side thereof and a convex surface towards the cylinder head at the other side thereof, and wherein an included angle between each of the plural splitter blades and an end face of the intake swirl gasket oriented towards the cylinder head ranges from 50 to 80 degrees.

Abstract: An engine air intake duct includes a duct wall and an orifice cap. The duct wall extends between an air inlet and an air outlet and has at least one orifice disposed therethrough. The duct wall has an integrally-formed closure mechanism adjacent the orifice. The orifice cap is moveable relative to and securable to the closure mechanism to substantially cover the orifice.

Abstract: Provided herein is a system and method for directing an airflow into an enclosure of a vehicle. The system comprises an enclosure comprising a vent at a base of the enclosure. The enclosure houses one or more sensors. The system comprises a deflector connected to the enclosure and configured to channel an airflow and direct the channeled airflow into the vent of the enclosure.

Abstract: An air cleaner has a first housing having an inlet and an upper opening, a second housing having an outlet and a lower opening, a filter element arranged between the upper opening of the first housing and the lower opening of the second housing. The first housing includes a looped wall, which protrudes from the inner surface thereof, and a sound absorbing member, which is made of an air permeable material and fixed to the upper end of the looped wall. The inner surface of the first housing, the inner peripheral surface of the looped wall, and the sound absorbing member define an air chamber.

Abstract: A variable noise attenuation element includes at least two tube sections that define an overall tube length that defines a first effective length and associated first peak frequency for noise attenuation, and a valve having a valve member. The valve joins the tube sections together and includes openings that permit communication between the tube sections when the valve is in an open configuration. The valve member operates to close the opening in response to a predetermined vacuum level within the tube sections to define a second tube effective length and associated second peak frequency for attenuation that is less than the overall length. A method of attenuating noise in a vehicle using a passive attenuation arrangement operates a valve disposed between two tube sections to change an effective length of the tube and associated peak frequencies for attenuation in response to an engine operating parameter.

Abstract: Uses of an online system include a target user and other users that are connected to the target users. The online system presents a content item received from a target user to the other users. The online system receives comments on the content item from the users and a selection of one of the comments from a user. The online system provides one or more types of actions (e.g., adding the comment to the content item or highlighting the comment) on the comment that the user can take. Upon receiving a selection of adding the comment, the online system modifies the content item to include the comment. Upon receiving a selecting of highlighting the comment, the online system associates a highlighting feature to the comment. The online system provides the modified content item or highlighted comment for display to the plurality of users.

Abstract: An internal combustion engine includes: an engine body (10) having at least one cylinder; and an air-supply manifold (4) including an adjustment pipe (12). The length of the adjustment pipe is set so that a first pressure wave (14A) propagating from the air-supply manifold toward the adjustment pipe and a second pressure wave (14B) propagating from the adjustment pipe toward the air-supply manifold have opposite phases from each other at the cylinder.

Abstract: An apparatus for controlling a variable valve timing (VVT) in an internal combustion engine, which varies an opening and closing time of an intake valve and an exhaust valve by controlling a rotation phase of a camshaft with respect to a crankshaft of the internal combustion engine, includes a controller configured to determine whether an engine state enters a scavenging region or not in an overlap area of the intake valve and the exhaust valve and to control the VVT to reduce a valve overlap period depending on a period of time elapsed after the engine state enters the scavenging region.

Abstract: An air duct for a vehicle functions to reduce intake noise and includes an outer housing configured having a pipe shape so that outside air is introduced into an engine therethrough. The air duct also has an inner pipe fixed in the outer housing so that an outer surface of the inner pipe is spaced apart from an inner surface of the outer housing, thereby partitioning the inside of the outer housing in a radial direction. A space between the inner pipe and the outer housing communicates with the inside of the inner pipe.

Abstract: An air intake system for supplying air to a snorkel of a vehicle includes a lower air intake vent having an opening defining a lower air pathway to the snorkel, and a scoop disposed in the lower air intake vent. The scoop has a base portion attached to a body component in the lower air pathway, a longitudinally transverse portion extending forward from the base portion, and a laterally transverse portion extending from an upper edge of the base portion and an upper edge of the longitudinally transverse portion. The air intake system further includes an upper air intake vent having an upper opening in a fender body panel vertically above the wheel well, the upper air intake vent defining an upper air pathway to the snorkel, and a snorkel protection flange extending downwardly from an inner surface of the fender body panel.

Abstract: A partition plate is configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage. The first intake passage is openable and closable by a valve. A shape of a first cross section orthogonal to an extending direction of the intake pipe is set on the basis of a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween.

Abstract: An air intake device includes: a valve body which includes a rotating shaft; a bearing member which rotatably supports the rotating shaft of the valve body; and an air intake port which includes a concave portion on which the bearing member is disposed, wherein the bearing member includes a positioning portion for positioning the bearing member with respect to the concave portion of the air intake port, facing surfaces which extend from the positioning portion along the concave portion of the air intake port and face each other in an inward radial direction of the rotating shaft with respect to the concave portion, with a gap therebetween, and protruding portions which protrude toward the concave portion of the air intake port from the facing surfaces and seal the gap.

Abstract: Synergistic induction and turbocharging includes the use of one or more throttles in close proximity to each cylinder intake valve to control air flow in each intake port delivering air to combustion cylinders in an internal combustion engine system. A turbocharger may also be affixed in close proximity to each cylinder exhaust valve to enable a synergistic combination of hyper-filling cylinders with combustion air and immediate harvesting of exhaust gas by adjacent turbochargers. In some implementations the turbochargers may be low-inertia turbochargers. The combination of individual throttles per intake port and a turbocharger in close proximity to each cylinder enables faster ramp-up of an engine in the early stages of acceleration. Various implementations thus provide improved fuel economy and improved engine performance in tandem, instead of one at the expense of the other.

Abstract: An intake module of a fresh air system for an internal combustion engine may include a housing having a plurality of openings through which fresh air is flowable, and a control device for controlling a cross-section of at least one of the openings. The control device may include at least one control staff and at least one control valve arranged on the control shaft in a rotationally fixed manner for the at least one opening. The control shaft may be mounted on the housing by at least one bearing bracket such that the control shaft is rotatable about a rotational axis. The housing may have at least one bearing receiving portion for receiving the bearing bracket. The bearing receiving portion may have an insertion opening through which the bearing bracket may be inserted in an insertion direction oriented perpendicular to the rotational axis.

Abstract: Synergistic induction and turbocharging includes the use of one or more throttles in close proximity to each cylinder intake valve to control air flow in each intake port delivering air to combustion cylinders in an internal combustion engine system. A turbocharger may also be affixed in close proximity to each cylinder exhaust valve to enable a synergistic combination of hyper-filling cylinders with combustion air and immediate harvesting of exhaust gas by adjacent turbochargers. In some implementations the turbochargers may be low-inertia turbochargers. The combination of individual throttles per intake port and a turbocharger in close proximity to each cylinder enables faster ramp-up of an engine in the early stages of acceleration. Various implementations thus provide improved fuel economy and improved engine performance in tandem, instead of one at the expense of the other.

Abstract: A vehicular suction noise transmission system includes a first intake apparatus, a second intake apparatus, a fuel recirculation apparatus, and a suction noise transmission apparatus. The first intake apparatus is connected to an internal combustion engine mounted in a vehicular engine compartment. The second intake apparatus is connected to the internal combustion engine. The suction noise transmission apparatus includes a first suction noise transmission end, a second suction noise transmission end, and a vibrating body. The first suction noise transmission end is connected to the second intake apparatus. The second suction noise transmission end is in communication with a vehicle interior. The vibrating body is provided to separate a second intake apparatus side and a vehicle interior side and configured to vibrate according to an intake pulsation so as to transmit a suction noise of the internal combustion engine to the vehicle interior.

Abstract: An intake system of an engine includes an engine and an intake manifold. The intake manifold defines individual intake air passageways each connecting one of cylinders to a volume chamber. Each of the individual intake passageways includes a first route and a second route. The first route has a natural frequency, of an air column, synchronized with a first revolution higher than an engine revolution for maximum torque such that a dynamic supercharging effect is obtained at the first revolution. The second route has a natural frequency, of an air column, synchronized with a second revolution higher than the engine revolution for maximum torque such that a dynamic supercharging effect is obtained at the second revolution. The second revolution differs from the first revolution. A difference between the first and second revolutions is set lower than or equal to 15% of a maximum engine revolution.

Abstract: An internal combustion engine (1) is provided with a supercharger (12) and a cylinder direct injection fuel injector (10). When the engine shifts in a low-speed supercharging region at a state where the wall temperature of a cylinder bore (3) is low, liquid fuel adheres to a wall surface of the cylinder bore (3) so that lubricating oil is diluted with the liquid fuel and released into a combustion chamber (4). As a result, there occurs abnormal combustion. In the present invention, the fuel injection amount is increased at the time when the engine shifts in a predetermined low-speed supercharging region. The lower the wall temperature of the cylinder bore, the larger the rate of increase of the fuel injection amount. This makes it possible to suppress the temperature of air-fuel mixture in the vicinity of compression top dead center and prevent the occurrence of abnormal combustion.

Abstract: A variable intake system includes first runners, each including a first inlet formed at one side thereof to introduce air from a surge tank thereinto, a first valve formed at the first inlet, and a first outlet formed at the other side thereof to discharge the introduced air, and second runners, each including a second inlet formed at one side thereof to introduce air from the surge tank thereinto, a second valve formed at the second inlet, and a second outlet formed at the other side thereof, wherein an extension part branched from the second runner is formed at the second runner, a third inlet is formed at the end of the extension part, and the total length of the second runner provided with the extension part is longer than the total length of the first runner.

Abstract: A structure of an air flow control valve includes: valve main body portions respectively provided in intake ports, and controlling the flow of a fluid supplied to combustion chambers of an internal combustion engine; connecting shafts provided integrally with the valve main body portions, and connecting the valve main body portions; a first bearing member formed of a single member having a first bearing hole turnably supporting the connecting shaft at a first end; and a second bearing member provided separately from the first bearing member, and formed of a single member having a second bearing hole turnably supporting the connecting shaft at a second end. The connecting shafts are formed integrally with the valve main body portions in a state where the first and second bearing members are respectively fitted onto the connecting shafts connecting the valve main body portions.

Abstract: Synergistic induction and turbocharging includes the use of one or more throttles in close proximity to each cylinder intake valve to control air flow in each intake port delivering air to combustion cylinders in an internal combustion engine system. A turbocharger may also be affixed in close proximity to each cylinder exhaust valve to enable a synergistic combination of hyper-filling cylinders with combustion air and immediate harvesting of exhaust gas by adjacent turbochargers. In some implementations the turbochargers may be low-inertia turbochargers. The combination of individual throttles per intake port and a turbocharger in close proximity to each cylinder enables faster ramp-up of an engine in the early stages of acceleration. Various implementations thus provide improved fuel economy and improved engine performance in tandem, instead of one at the expense of the other.

Abstract: A device for transmitting sound has a transmission element shaped to form a sound symposer and forms a sound cone between a rear wall and a front-side panel, Thus, sound is projected from the latter through openings in the panel into the vehicle interior.

Abstract: In an engine intake control apparatus, a cover is made of synthetic resin, a motor support plate is made of metal, a positioning boss is integrally formed on the cover, a first positioning hole arranged on a motor support plate is fitted on an outer peripheral surface of the positioning boss, and the positioning boss is positioned and fitted with a throttle valve body each other. With such an engine intake control apparatus, it is possible to perform with high accuracy the mutual positioning between the three components, i.e. the motor support plate, the cover and the throttle valve body, and it is possible to effectively improve the opening and closing accuracy for the opening and closing of the throttle valve by the motor.

Abstract: Embodiments as described herein provide a simplified turbo recharger for an efficient, reliable, low-cost system that delivers good performance for improving efficiency of a vehicle using electric power. Embodiments as described herein may be used with electric motor, combustion engine hybrid vehicles to improve the fuel efficiencies of such vehicles. A turbine may be positioned in an exhaust stream of a vehicle that is coupled to a generator to recharge the battery of a vehicle. The turbine may include a wastegate to permit the exhaust stream to enter or bypass the turbine depending on the charge of the battery, the rate of rotation of the turbine, pressure within the turbine, the speed of the engine, or a combination of the above.

Abstract: An intake system for a vehicle includes an air cleaner assembly in a compact size. Intake passages introduce intake air to front and rear cylinder blocks of a multicylinder engine, and an air cleaner assembly is connected to upstream ends of the intake passages. A space inside an air cleaner case of the air cleaner assembly is partitioned into upper and lower sides by a partition wall, forming a clean chamber above the partition wall and a dirty chamber below. The intake passages are arranged to pass through the dirty chamber in an up-down direction, and inlets of the intake passages are arranged in the clean chamber. A through hole is formed in the partition wall between the intake passages for the front and rear cylinder blocks. An air cleaner element, configured to clean incoming intake air, is arranged to occlude the through hole.

Abstract: Various systems and methods are described for reducing engine oil dilution in a boosted engine. One method comprises, when engine oil dilution is higher than a first threshold and engine oil temperature is below a temperature threshold, adjusting a position of an air induction system (AIS) throttle, generating a vacuum, and providing the vacuum to a crankcase of the boosted engine to enhance fuel evaporation from engine oil. The providing of vacuum may be discontinued when engine oil dilution is lower than the first threshold and/or when engine oil temperature rises above the temperature threshold.

Abstract: A variable intake system for a vehicle to regulate an amount of intake air according to driving conditions of an engine may include an air cleaner connected to an intake duct which draws in intake air and forms a flow path for the intake air inside the air cleaner, a battery assembly installed in the flow path inside the air cleaner, which includes a plurality of cooling paths that allow the intake air to flow through the plurality of cooling paths, and a valve body installed in the air cleaner and selectively varying the flow path of the intake air.

Abstract: A venturi mixing valve assembly includes three open-ended tubular sections. A first section, coupled to a supply of a first gas and a supply of a second gas, has a sleeve defined therein wherein an annular channel open on one end thereof is defined between the sleeve and an inner surface of the first section. A second section defines an annular region with a plurality of holes and a venturi region coupled to the annular region. The annular region circumscribes at least a portion of the first section's sleeve. A third section is threadably coupled to outer surfaces of the first and second sections such that rotation of the third section in a first direction causes the first and second sections to move axially towards one another, while rotation of the third section in a second direction causes the first and second sections to move axially away from one another.

Abstract: Methods and systems are provided for reducing the generation and transmission of objectionable noise from an aspirator to a vehicle cabin during vacuum production. During selected conditions, motive flow through an intake aspirator may cause a hissing noise to be produced at the aspirator, and transmitted through an open check valve in a bypass path between the aspirator and a vacuum reservoir, into a vehicle cabin. During these conditions, an aspirator shut-off valve is closed to reduce motive flow through the aspirator, thereby reducing the hissing noise.

Abstract: Systems and methods are provided for engine systems including a vacuum-powered multiple tap aspirator coupled between atmospheric, an engine crankcase, or another source and a vacuum source such as a compressor inlet or engine intake manifold. The multiple tap aspirator includes a suction tap arranged in a throat of the aspirator, a suction tap arranged in a diverging cone of the aspirator, and a suction tap arranged in a straight exit tube downstream of the diverging cone of the aspirator. The aspirator provides vacuum generation and suction flow over a range of vacuum levels at the suction taps, and suction flow only passes through a single check valve before entering the aspirator.

Abstract: An intake control device includes: an air cleaner disposed above an engine; a pair of right and left intake ducts projecting toward a front of a vehicle body from the air cleaner to take an outside air in the air cleaner; and a sensor unit coupled to a throttle cable extended from a throttle grip, and detecting an operation amount of accelerator, in which the sensor unit is disposed between the pair of right and left intake ducts at a position above the engine and below the air cleaner.

Abstract: A dual path fresh air system, having a first air supply path, the first path supplies air to at least one first cylinder set; a second air supply path, the second path supplies air to at least on second cylinder set; a first exhaust gas recirculation inlet fluidly connected to the first path to introduce recirculated exhaust gas into the first path; a second exhaust gas recirculation inlet fluidly connected to the second path to introduce recirculated exhaust gas into the second path; a first valve member, which is arranged upstream of the first exhaust gas recirculation inlet in the first path, wherein the first valve member controls fluid flowing through a cross section of the first path; and a second valve member which is arranged upstream of the second exhaust gas recirculation inlet in the second path, for controlling fluid flowing through a cross section of the second path.

Abstract: An internal combustion engine may include a cylinder head having a plurality of intake channels which lead to combustion chambers. A fresh gas distributor may be included for feeding fresh gas to the intake channels. The fresh gas distributor may have a flap arrangement including a flap shaft, which bears at least one flap for controlling the intake channels. The flap shaft may be mounted such that the flap rotates about a flap rotation axis. The fresh gas distributor may have a housing flange securing the fresh gas distributor to the cylinder head. The flap arrangement may be arranged in a region of the housing flange in a distributor housing of the fresh gas distributor. The cylinder head may have a recess, into which the fresh gas distributor is inserted in a region of the flap arrangement.

Abstract: A kinetic system-oriented variable intake structure includes an intake passage, an air storing space, an exhaust passage, a control valve, and a bypass air chamber. The intake passage and the exhaust passage are in communication with the air storing space to allow air to enter the air storing space via the intake passage and then be discharged from the exhaust passage. The bypass air chamber is in communication with the air storing space through the control valve. The control valve turns on or off in accordance with a rotation speed of the kinetic system. Accordingly, the kinetic system-oriented variable intake structure is capable of high performance at any target rotation speeds.

Abstract: A sound generator 103 for an anti-noise system for influencing sound waves propagating in exhaust systems or intake systems of vehicles driven by an internal combustion engine includes a loudspeaker basket 123, a membrane 122 supported by the loudspeaker basket 123, a permanent magnet 121 supported by the loudspeaker basket 123, a voice coil 126 supported by a voice coil carrier 125 and a membrane stop 150. The voice coil 126 is located within a constant magnetic field generated by the permanent magnet 121. The voice coil carrier 125 is supported by the membrane 122. The membrane stop 150 is located on the loudspeaker basket 123 adjacent to the membrane 122. The membrane stop 150 includes a projection 151 extending towards the membrane 122. An anti-noise system using the sound generator and a vehicle using the anti-noise system are also provided.

Abstract: An apparatus for reducing a pumping loss may include an auxiliary runner formed in an air-intake unit supplying air to a cylinder, wherein intake air may be temporarily stored in the auxiliary runner by using a flow of an exhaust gas during an exhaust stroke, and the intake air stored in the auxiliary runner may be supplied to the cylinder together with the air introduced to the air-intake unit during an intake stroke.

Abstract: An intake system (10) of an internal combustion engine includes an intake manifold (12) with at least two feed pipes (14) connected with cylinder head intake ports of the internal combustion engine and includes at least one intermediate chamber (30) having connections (34) to an interior volume (24) of each feed pipe (14). Each connection (34) can be opened or closed by way of an intake control valve.

Abstract: An intake air routing device for an engine having a plurality of cylinders, includes a pair of half case bodies forming an air chamber, an air filter arranged in the air chamber and configured to purify outside air received via an intake duct, and a plurality of intake passages extending from the air chamber. The plurality of intake passages are connected with respective intakes ports of the engine. A partition plate is disposed in the air chamber, and is formed separately from the case bodies. The partition plate is arranged in the air chamber such that it extends in the air chamber by a predetermined length in a direction intersecting with a direction where the intake passages are lined up so as to partition the intake passages from each other. Such intake air routing device reduces intake interference while maintaining a small size of the intake air routing device.

Abstract: Embodiments of the invention provide an apparatus for damping or attenuating acoustic vibrations in an air induction system of a motor vehicle, the apparatus defining a passageway through which induction air may be drawn to an engine of the vehicle, the apparatus comprising: damping means, the damping means being provided around the passageway for damping or attenuating acoustic vibrations in the induction air; and hydrocarbon trapping means, the hydrocarbon trapping means comprising a sheet of trapping material provided around at least a portion of the passageway, the trapping means being arranged to provide a flow-past hydrocarbon trap for trapping hydrocarbon vapours entering the passageway from the engine.

Abstract: A dynamic variable intake tubing includes a dynamic swirl supercharging tube which has a tubular member. The tubular member has a through hole axially penetrated. Flow-guiding grooves which follow a forward helical course or a reverse helical course are disposed on an inner peripheral surface of the through hole. At least a bearing is disposed around an outer circumferential surface of the tubular member to enable the tubular member to rotate freely. Flow-guiding blades are disposed at an intake end of the tubular member for ushering in gas current and guiding the gas current to the flow-guiding grooves. The flow-guiding grooves speed up intake and render combustion complete while an engine is operating at high rotational speed. The dynamic variable intake tubing generates an appropriate back pressure while the engine is operating in low speed, thereby increasing torque output and enhancing the performance of the dynamic swirl twofold to fivefold.

Abstract: A sound transmission system of a motor vehicle, having an intake sound transmission device which can be coupled via a first tubular connecting element to an air intake manifold which leads to an internal combustion engine and via a second tubular connecting element to a vehicle interior, the first tubular connecting element being assigned a first switchable shut-off device, having a resonator device which interacts with the intake sound transmission device and can be coupled via a third tubular connecting element to the air intake manifold which leads to an internal combustion engine, the third tubular connecting element being assigned a second switchable shut-off device.

Abstract: The present invention relates to a method for producing a pipe (1) which is provided in its wall (2) and between its ends with at least one channel (4) which passes through the wall (2), in which method a plastic pipe preform (16) is blow-moulded, wherein a protrusion (17) is provided for the channel (4), this protrusion lining the pipe preform (16) and having inside dimensions which are larger than the outside dimensions of the channel (4), in which method the pipe preform (16) in its as yet unsolidified state is squashed in the region of the protrusion (17) in such a way that a rough channel (21) communicating with the interior (3) of the pipe (1) is formed for the channel (4), this rough channel being closed at its end remote from the interior (3) of the pipe and having, apart from the desired channel length (7), the outside dimension of the channel (4), and in which method the squashed pipe preform (16) in its solidified state is cut in the region of the rough channel (21) in such a way that the channel (

Abstract: A venturi mixing valve assembly includes three open-ended tubular sections. A first section, coupled to a supply of a first gas and a supply of a second gas, has a sleeve defined therein wherein an annular channel open on one end thereof is defined between the sleeve and an inner surface of the first section. A second section defines an annular region with a plurality of holes and a venturi region coupled to the annular region. The annular region circumscribes at least a portion of the first section's sleeve. A third section is threadably coupled to outer surfaces of the first and second sections such that rotation of the third section in a first direction causes the first and second sections to move axially towards one another, while rotation of the third section in a second direction causes the first and second sections to move axially away from one another.

Abstract: An internal combustion engine having a plurality of cylinders and an air intake system, with the air intake system formed from at least one distributor pipe, a plurality of intake pipes and at least one plenum, and with the plenum positioned between the distributor pipe and the intake pipes. Here, the combustion air is fed to the air intake system via an air guiding duct which opens out into the distributor pipe, with the charge pressure of the combustion air reduced between the outlet out of the compressor and the inlet into the combustion chamber. A distributor pipe length is dimensioned as a function of an equivalent distributor pipe diameter such that it is possible for a reduction in the charge pressure to be obtained within the air intake system by expansion taking place partially in the plenum in the respective intake pipe and/or within the distributor pipe.

Abstract: An air-balanced engine assembly is configured to operate efficiently while producing a reduced level of harmful emissions. The engine assembly includes a two-stroke internal combustion engine with multiple power cylinders and intake and exhaust manifolds that fluidly communicate with the cylinders. The engine assembly also includes an air balancing assembly with valves that control intake air flow from the intake manifold to the cylinders. The valves cooperate to balance intake air flow among the cylinders and are configured to substantially equalize trapped equivalence ratios among the cylinders.

Abstract: An intake control system for a multi-cylinder combustion engine with control valves positioned within intake passageways that can vary the cross-sectional area of the intake runners to increase air intake velocity at low engine speeds. The control system includes an inner frame that can be inserted into a lower manifold after manufacture. The inner frame includes a plurality of flapper valves that are actuated by a four-bar link design, which is driven by a hypoid gear-set. The control system controls an internal DC electric motor that actuates a worm-drive gear-set, which in turn drives the hypoid gear-set to either engage or retract the flapper valves within the intake passageways.