Abstract: Systems and methods for operating an engine that includes two throttles that are arranged in parallel to deliver air into a single intake manifold are described. In one example, a first throttle is opened before a second throttle during a first condition and the second throttle is opened before the first throttle during a second condition. The throttles may be operated in this way to ensure even operation of the throttles.

Abstract: An intake device for an internal combustion engine configures a flow passage for intake air that is drawn into combustion chambers. The intake device includes an intake manifold configuring multiple runners that respectively distribute intake air to multiple cylinders, a surge tank including a cavity that is connected to the runners and defines a convergence portion, a throttle body incorporating a throttle valve, and a connection pipe connecting the surge tank and the throttle body and configuring a curved flow passage extending between the throttle body and the surge tank. The connection pipe includes a partition plate that divides the curved flow passage into a circumferentially inner flow passage and a circumferentially outer flow passage.

Abstract: An air intake apparatus includes an air intake apparatus body including a surge tank, a valve body rotatably attached to the surge tank and configured to rotate between an open position and a closed position to open and close a fluid passage formed at a partition wall dividing an inside of the surge tank into two parts, the valve body being out of contact with the partition wall at the open position and being in contact with the partition wall at the closed position, the air intake apparatus body being formed by a first member to which the valve body is attached and a second member joined to each other, and the first member including a jig-receiving portion arranged in a vicinity of the fluid passage and configured to receive a jig holding the first member when the first member and the second member are being joined to each other.

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 air intake control valve includes a body extending to divide an inner portion of a surge tank of a multi-cylinder internal combustion engine into two portions, the body serving as a divided surface to divide the inner portion of the surge tank into the two portions, a valve element operated to rotate for opening and closing a fluid passage formed at the body, and a seal member sealing between a sealed surface of the surge tank and an outer periphery of the body, the seal member including a seal portion constituted by two contact portions that make contact with the sealed surface in a state where the two contact portions extend in directions opposite from each other relative to the divided surface.

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: An intake assembly for a 3-cylinder, V-configured engine comprises an intake manifold configured to conduct combustion air to a first, two-cylinder, cylinder head housing assembly and a second, single-cylinder, cylinder head housing assembly. A centrally extending plenum defines a plenum axis. A first plurality of intake runners, in fluid communication with the plenum, extend from a front side and transition through a circumferential arc around an upper side to deliver combustion air to, the first, two-cylinder, cylinder head housing assembly. A single intake runner, in fluid communication with the centrally extending plenum, extends from a rear side and transitions through a circumferential arc around the upper side to deliver combustion air to, the second, single-cylinder, cylinder head housing assembly. A zip tube delivers combustion air to the central plenum at a location that is between one of the first plurality of intake runners and the single cylinder intake runner.

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: An example induction system for an engine includes a plenum in fluid communication with multiple primary runners. A plenum valve is arranged between first and second chambers of the plenum, which are respectively in fluid communication with first and second sets of the primary runners. The plenum valve is configured to move between open and closed positions and regulate flow between the first and second chambers. A second runner is arranged upstream from and in fluid communication with the plenum. A runner valve is arranged in the secondary runner and configured to vary the amount of flow through the secondary runner. A common actuator is interconnected to both the plenum and runner valves and is configured to move both of the plenum and runner valves between desired positions to achieve desired valve configurations that tune the engine.

Abstract: The intake manifold assembly comprises three blocks each molded from a plastic material by injection molding, the three blocks consisting of a first block defining a half of the surge tank, a second block defining a half of the individual intake pipes and a third block defining a remaining half of the surge tank and a remaining half of the individual intake pipes. Thereby, the intake manifold assembly may be provided with various features for defining a pair of intake pipe sections arranged in a mutually parallel relationship while being made to be suitable for an injection molding process. Because the surge tank are defined by the first and third blocks while the individual intake pipes are defined by the second and third blocks, the intake manifold assembly essentially consisting of three blocks can internally define essential features required for a dual port intake device without requiring additional component members.

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: A sub collector is connected to a main collector disposed downstream of a throttle valve in an intake passage and a control valve for collector capacity disposed between the two collectors controls connection therebetween. A difference in pressure between the two collectors is reduced when a condition that pressure in the sub collector is lower than a predetermined value in relation to pressure in the main collector occurs. Namely, the control valve is forcibly opened at a point from a fully closed position of the throttle valve to acceleration operation thereof.

Abstract: In an air intake apparatus of an internal combustion engine, disassembling a surge tank made of resin with an intake air control valve into divided pieces, and bonding the divided pieces by vibration adhesion, for preventing the intake air control valve from breaking or characteristic thereof from changing during the vibration adhesion or for ensuring a sealing property between parts, an inner space in the surge tank is divided into first and second chambers by providing a horizontal partitioning wall within the surge tank. The surge tank is divided into a middle piece made of resin and formed integrally with the partitioning wall, a lower piece made of resin, and an upper piece also made of resin, and these three pieces are bonded by the vibration adhesion to form the surge tank. A communicating hole for making the first chamber communicate with the second chamber is formed in the partitioning wall, and a valve body for opening and closing the communication hole is provided in the communicating hole.

Abstract: A variable intake apparatus for an in-line four-cylinder internal combustion engine includes a rotary valve 3 provided between an intermediate portion along the length of four air intake passages 41 to 44 and an intake air collecting chamber 5, and a control means switching the rotary valve 3 in triple stages in response to the engine speed. The control means is constructed such that at a low speed range, communications are blocked off between the adjacent intake passageways 41 and 42, 42 and 43, 43 and 44, at an intermediate speed range, communications are established between pairs of intake passageways 41 and 44, 42 and 43, and at a high speed range, communications are established not only between the adjacent intake passages 41 and 42, 42 and 43, 43 and 44, but also between the respective air intake passageways 41 to 44 and the intake collecting chamber 5.

Abstract: Inlet pipes extend from a collector to the cylinder inlets of the internal combustion engine. The inlet pipes are formed with mutually facing openings in their adjacent walls. Control flaps each have a shaft, which is respectively provided with a damping element and is mounted by way of the damping elements in a bearing bush. The openings in the inlet pipes are selectively closed and opened with the control flaps.