Abstract: A first throttle body and a second throttle body include valve rotation devices that independently drive respective throttle valves. The first throttle body and the second throttle body are arranged such that the respective valve rotation devices have states rotated around respective bore central axes to cause respective throttle valve rotation shafts to have angles with respect to straight lines parallel to a crankshaft in an engine top view.

Abstract: An intake control valve includes a valve body being made of resin, the valve body configured to be pivotally mounted to a surge tank of an internal combustion engine, the valve body pivoting between an open position and a closed position to for opening and closing a fluid passage formed at a division wall, the division wall dividing inside of the surge tank into two portions; and a bearing being made of metal, the bearing being integrally provided with a first end portion of the valve body by insert molding when resin molding the resin-made valve body.

Abstract: Methods and systems are provided for improving control of high dilution EGR. An intake plenum is divided so that fresh intake air and EGR can be delivered to engine cylinders via dedicated plenum portions. Distinct sets of throttles are provided in the cylinder intake ports coupled the different plenum portions so that a ratio of intake air flow and EGR flow to the engine cylinders can be rapidly adjusted in response to sudden changes (e.g., increase or decrease) in EGR demand.

Abstract: An engine assembly generally includes an engine and an intake manifold. The engine includes a plurality of cylinders. The plurality of cylinders includes a pair of cylinders. The engine is configured to sequentially fire the pair of cylinders. The intake manifold defines a plurality of ports. Each port is in fluid communication with one of the plurality of cylinders. The plurality of ports includes a pair of ports. Each of the pair of ports is disposed in fluid communication with one of the pair of cylinders. The intake manifold further includes a baffle disposed between the pair of ports to restrict fluid flow within the intake manifold between the pair of ports.

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 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: A mounting device can mount an intake manifold to an engine and includes a bending moment applying device applying a bending moment to the intake manifold as the intake manifold is mounted to the engine.

Abstract: A manifold, such as an intake manifold or a fuel injection manifold, for use in an internal combustion engine, as well as a method of operating such an engine, are disclosed. In at least one embodiment, the manifold includes an input end capable of being coupled at least indirectly to an air input device, first and second intake tubes linking the input end to first and second exit ports, respectively, and a first communication channel linking the first and second intake tubes. The communication channel has a first width that is substantially less than a second width of at least one of the first and second intake tubes, and the communication channel links upper portions of the first and second intake tubes, while lower portions of the intake tubes remain separated by a wall.

Abstract: A strong structural body is formed by integrating a side wall portion in the form of inverted V and a plate-shaped bottom wall portion. Plate-shaped side wall portions of the side wall portion in the form of inverted V are integrated with respective manifold arrays, whereby the two manifold arrays are linearly connected by the plate-shaped bottom wall portion.

Abstract: A resin molded body constituting a resin intake apparatus includes a surge tank and a plurality of branch passages each branching off from the surge tank. A communication passage is formed in a wall forming the surge tank to communicate a bottom of the surge tank with one of the branch passages. The resin molded body is formed by two split molded parts integrally welded to each other at welded portions so that the communication passage is formed between the welded portions.

Abstract: A device including two air distribution chambers configured to be fixed on a cylinder head and an air distributor and/or an air transfer pipe, the air transfer pipe and the air distribution chambers including, in the immediate surroundings of their nozzles, for being relatively positioned and assembled together: between the air distributor and one of the air distribution chambers, a positioning and supporting mechanism for support and precise relative centering, substantially without clearance, except for possible pivoting about the axis of engagement, once the centering has been provided along the axis, and, between the air distributor and the other air distribution chamber: an additional support mechanism and locating mechanism. A fixing mechanism locks, at the required swivel angle and in relative support, each air distribution chamber and the air distributor.

Abstract: A noise and vibration reduction system for an engine affixed to a body and a method for reducing vibrations in the body produced by that engine during operation. The present invention is particularly related to noise and vibration reduction in auxiliary power units installed on long-haul trucks and similar types of transportation vehicles. The primary noise and vibration reduction components of the present invention include an air intake silencer, a vibration tuner, and an engine speed limiter.

Abstract: Improvements in an intake manifold for an internal combustion engine having separate plenum intake storage tanks. Each plenum stores an internal large volume of air that more easily drawn into intake conduits that feed air into the intake ports of an engine. Each plenum has one or more intake ports where air is supplied from a throttle body and a plurality of intake conduits. In the preferred embodiment there are three intake conduits that provide air for a total of six cylinders. The plenums are constructed from formed pieces to provide thinner walls thereby increasing the internal volume of the plenums. The plenums further have connection ports for sensors. The intake conduits terminate a distance within the plenum and have flared ends that can be oriented towards the center of the plenum to improve air movement and flow from the input.

Abstract: A switching resonance intake system is provided an internal combustion engine with a first and a second cylinder bank. The cylinder banks are each coordinated with a resonance container with a group of swing pipes leading to the cylinders, and the resonance containers are joined together by resonance pipes provided with switching valves. In the intake system, the swing pipes coordinated with the one cylinder bank are connected to the resonance container adjacent to the other cylinder bank. The intake system is intended for use in an internal combustion engine with cylinder banks having a V-layout.

Abstract: An internal combustion engine for a vehicle comprises a pair of intake collectors (3A, 3B) and a communicating pipe (13) connecting the pair of intake collectors (3A, 3B). A negative pressure supply port (15) supplying intake negative pressure of the internal combustion engine to a brake booster is provided at an end of the communicating pipe (13). By providing an air amount deviation compensating arrangement which compensates for a deviation in the amounts of air flowing into the pair of intake collectors (3A, 3B) from the brake booster when braking of the vehicle is released, the amounts of air supplied to the internal combustion engine from the pair of the intake collectors (3A, 3B) are equalized.

Abstract: The present invention provides an air intake assembly including a first portion defining a first chamber through which airflow passes. The first portion is coupled to a first throttle member to allow communication from the first chamber to the first throttle member. The air intake assembly also includes a first filter element coupled to the first portion and positioned upstream of the first chamber, and a second portion defining a second chamber through which airflow passes. The second portion is coupled to a second throttle member to allow communication from the second chamber to the second throttle member. The air intake assembly further includes a second filter element coupled to the second portion and positioned upstream of the second chamber, and a conduit coupling the first and second portions. The conduit allows communication between the first and second chambers at a location downstream of the first and second filter elements.

Abstract: For a V-type engine which has an independent air-intake system for each one of banks, a vibration plate unit is disposed in the interior of a resonance conduit for obtaining the beneficial effects of resonant supercharging. In this vibration plate unit, a plate member made from metal is fitted in the interior of the resonance conduit via a support member made from rubber, and thereby it is arranged, while blocking mutual flow of air between the banks, also to obtain the beneficial effects of resonant supercharging by enabling the mutual transmission of pressure between surge tanks.

Abstract: An outboard motor is mounted on a hull and has an engine disposed in an upright position in a cowling so that a crankshaft thereof extends generally vertically during cruising. An embodiment of the motor includes a first surge tank disposed on the opposite side of a cylinder head of the engine with respect to the crankshaft of the engine; long intake pipes that communicate with the first surge tank and an intake port of the engine; second surge tanks disposed between the long intake pipes and the engine for communicating with the first surge tank; short intake pipes provided in the midway of the long intake pipes on the engine side for communicating with the second surge tanks; and on-off valves for opening and closing the short intake pipes.

Abstract: There is provided a shaft-member holding construction which allows easy attachment of a shaft member. The construction includes a shaft member 4 supporting a rotary member 2, a bearing 5 for rotatably holding the shaft member 4, and a bearing holding member 31, 32 having an opening 31a, 32a capable of receiving the bearing 5 along an axial direction of the shaft member 4. The bearing holding member 31, 32 has a gap 31b, 32b capable of receiving the shaft member 4 from a radial direction relative to the axial direction.

Abstract: In an intake module for an internal combustion engine having an intake module which includes a housing with a first volume in which air drawn in via an inlet orifice accumulates, a second volume in which the air is distributed to various cylinders of the engine and which contains inlet ports leading to inlet valves of the engine, a support module with associated throttle elements is arranged between the first volume and the second volume of the intake module within the housing so as to provide for short travel passages between the throttle elements and the intake valves of the engine.

Abstract: An intake system for a combustion engine has at least two rows of cylinder heads, each of which features an intake manifold with individual pipes leading to the cylinders. The intake manifolds are connected to one another through transverse ducts equipped with switching valves as well as to an air supply duct leading to one of the transverse ducts, which features a throttle valve to regulate the air volume. The air supply duct is preferably comprised of a double-fluted distributor pipe leading to one of the transverse ducts. A throttle valve housing is connected upstream of the distributor pipe, and an interior wall is integrated into the distributor pipe, thereby dividing the interior space thereof into two interior ducts of virtually equal cross section.

Abstract: An engine air intake device comprises a collector divided by a partition wall into first and second volume chambers, first and second upstream intake pipe portions, a plurality of first and second downstream branch pipes, and a first communication valve. The first and second upstream intake pipe portions are connected to an upstream side of the first and second volume chambers, respectively. The first and second downstream branch pipes extend from the first and second volume chambers, respectively, to respective intake ports of first and second banks of first and second cylinders, respectively. The first communication valve is mounted to the partition wall in a position that does not interfere with a path of a main flow of intake air inside the collector and configured and arranged to allow communication between the first volume chamber and the second volume chamber when the first communication valve is open.

Abstract: A simplified variable intake manifold is disclosed for use with an internal combustion engine. The manifold utilizes a single valve actuator to vary the resonant frequency of a pair of plenums. The two plenums are joined by first and second communication passages of differing lengths connected to provide cross flow between two plenums. Each plenum has an inlet for receiving intake air from a throttle body and a group of runners adapted for connection with a like group of engine cylinders to direct inlet air from the plenums to combustion chambers of the cylinders. A control valve having an elongated shaft extends through the first and second communication passages and includes separate blades rotatable with the shaft to open or close the passages to provide at least three modes of tuning of the plenums. A stepper motor or other suitable device acts upon the shaft to rotate the blades within the communication passages.

Abstract: An intake manifold for a V-type engine includes an air inlet for admitting air into the manifold, a first plenum in fluid communication with the air inlet, and second and third plenums that are each in fluid communication with the first plenum. The intake manifold also includes a short runner for each cylinder of the engine, which short runner connects the first plenum to the cylinder. The intake manifold further includes two sets of long runners. The first set of long runners connects the second plenum to one bank of engine cylinders, and the second set of long runners connects the third plenum to the other bank of cylinders.

Abstract: An intake air control valve of the invention has a valve body and a valve holder, and is attached to a communication hole on a partition wall separating a surge tank chamber within a surge tank of a multiple cylinder internal combustion engine by fitting and inserting a valve holder. A valve hole is formed within the valve holder, and a butterfly type valve body is attached via a valve shaft so as to freely open and close a valve hole. A seal member is fitted to a groove provided in a peripheral edge portion of the valve holder. The seal member is formed by a fitting and attaching portion fitted and attached to an inner side of the groove of the valve holder and a leading end seal portion brought into contact with an inner peripheral portion of the communication hole in the partition wall. Recess portions open to an inner side of the groove is provided in the fitting and attaching portion in parallel in a longitudinal direction so as to be sectioned by a plurality of ribs.

Abstract: An intake manifold for a V-type engine includes an air inlet for admitting air into the manifold, a first plenum in fluid communication with the air inlet, and second and third plenums that are each in fluid communication with the first plenum. The intake manifold also includes a short runner for each cylinder of the engine, which short runner connects the first plenum to the cylinder. The intake manifold further includes two sets of long runners. The first set of long runners connects the second plenum to one bank of engine cylinders, and the second set of long runners connects the third plenum to the other bank of cylinders.

Abstract: In an intake system of a variable air-intake characteristic type for a multi-cylinder engine, an intake air-dispensing box is comprised of a dispensing box body which includes an intake air inlet, first and second intake branch pipes and one of halves of a partition wall and which has an opening provided in its outer wall opposite from the first and second intake branch pipes to extend between first and second dispensing chambers, and a lid detachably coupled to the dispensing box body to close the opening and having the other half of the partition wall. The lid is made of a light alloy by casting, and a valve bore and bearing bores for supporting a valve shaft of the on-off valve are defined in the other half of the partition wall. Thus, it is possible to carry out the maintenance of the on-off valve only by removing the lid disposed outside the intake air-dispensing box from the box, leading to an enhancement in maintenance property.

Abstract: Air intake manifolds (32) for vehicle engines (50) may include a plate-shaped short runner valve (16) that is rotatably disposed within an aperture (19) of a wall partition (42). The valve (16) may be operated to open and close the aperture. A flange (22) may extend from an inner surface of the aperture and the flange may define a sealing face (22b). An elastic sealing member (21) may be disposed along a peripheral edge of the valve. The sealing member may include first and second projections (21a, 21b) extending from the peripheral edge of the valve. The first and second projections may be arranged in a substantially V-shape. Further, the terminal ends of the first and second projections are preferably disposed so as to closely contact the sealing face when the valve is rotated to the closed position.

Abstract: An intake system of an outboard motor including a vertically arranged V-type engine comprises, an intake manifold connected to the intake ports, a surge tank connected to the intake manifold and disposed at a rear side from a central portion of the engine, a throttle body provided with a throttle valve, a plurality of intake passages for high revolution operation of the engine. The intake passages for high revolution operation extend from the surge tank and are communicated with the intake manifold, and the intake passages for low/intermediate revolution operation extend from the surge tank and are joined with the intake passages for high revolution operation, respectively. Each of the intake passages for low/intermediate revolution operation has a length longer than that for high revolution operation. A valve open/close mechanism is also disposed for opening/closing all at once portions upstream side of the joined portions of both the intake passages of the engine.

Abstract: An engine includes an engine body and an air induction system. The engine body has a cylinder block that defines cylinder bores. Pistons are reciprocally disposed within the respective cylinder bores. A cylinder head member closes the respective cylinder bore to define combustion chambers together with the cylinder bores and the pistons. The air induction system is arranged to supply air to the combustion chambers. The air induction system includes intake conduits that communicate with the combustion chambers. Inlet conduits communicate with the intake conduits and extend along the intake conduits to provide a sufficiently long air intake to improve the torque characteristics of the engine. In one preferred outboard marine embodiment, this longer air intake does not require any increase in the size of the engine cowling.

Abstract: A suction system has an arrangement for utilizing resonance effects and is suitable for an internal-combustion engine having opposed cylinder banks. The suction system has a resonance container which has boundary walls. On the one hand, the resonance container is connected with the atmosphere and, on the other hand, it is connected with cylinders of the internal-combustion engine, the arrangement being provided in the resonance container as a control device which can vary the resonance cross-section, and the resonance container is connected with a feeding device having separate feeding pipes. For optimizing the torque behavior of the internal-combustion engine, the control device is fixed from the idling to a medium rotational speed range in a first end position and, together with the feeding pipes of the feeding device, forms two guiding channels which supply the cylinders the two cylinder banks with air.

Abstract: A four-cycle engine includes an improved construction that is provided with an air induction system, which is suitable for low speed engine operations and which can provide an easy assembling and/or maintenance work. The engine has multiple cylinders arranged in a V-configuration. An air induction system supplies air to combustion chambers of the cylinders and includes a pair of plenum chamber members. The plenum chamber members are generally disposed on an opposite side of a crankcase relative to a crankshaft. Both the plenum chamber members are positioned in close vicinity to each other. Each one of the plenum chamber members defines a plenum. A balance pipe is affixed to both the plenum chamber members to couple together the plenum chambers.

Abstract: An improved compact and highly efficient variable tuned intake system for a V-type, multi-cylinder engine. The induction system provides variable tuning length with both the high speed and low speed inlets being directed away from the valley between the cylinder banks to minimize the change in the flow directions into the combustion chambers.

Abstract: An engine includes an engine body and an air induction system. The engine body has a cylinder block that defines cylinder bores. Pistons are reciprocally disposed within the respective cylinder bores. A cylinder head member closes the respective cylinder bore to define combustion chambers together with the cylinder bores and the pistons. The air induction system is arranged to supply air to the combustion chambers. The air induction system includes intake conduits that communicate with the combustion chambers. Inlet conduits communicate with the intake conduits and extend along the intake conduits to provide a sufficiently long air intake to improve the torque characteristics of the engine. In one preferred outboard marine embodiment, this longer air intake does not require any increase in the size of the engine cowling.

Abstract: An air guiding system is provided for an internal-combustion engine of a piston-type construction and includes an air filter and a feeding device for a suction system connected with cylinders of the internal-combustion engine. A receptacle, through which air flows, is arranged in a pipe between the air filter and the feeding device for influencing resonances. For optimizing the sound characteristics of the internal-combustion engine, the pipe is interrupted in the area of the receptacle, and a cross-section of the receptacle is larger than the cross-section of pipe sections of the pipe extending to the receptacle.