Abstract: A throttle body adapter connects a throttle body and an air intake manifold spaced from the throttle body in a marine engine. The throttle body adapter has an air passage having an inlet and an outlet of different shapes. The throttle body adapter has threaded openings which allow a fuse box, an electronic control module, a hose fitting and a mounting bracket for a beauty cover to be mounted to the throttle body adapter with threaded fasteners. The throttle body adapter further comprises a threaded opening adapted to receive an air inlet temperature sensor.

Abstract: Various systems for reducing noise, vibration, and harshness in an intake manifold are provided. In one example, an intake manifold includes one or more runners, a plenum fluidically coupled to the one or more runners, an inlet having a wall thickness, and a first and a second indentation, where the first indentation protrudes radially inward at a first inflection point in a first direction, the second indentation protrudes radially inward at a second inflection point in a second direction substantially anti-parallel to the first direction, and the wall thickness is maintained at the first and second inflection points. In this way, noise, vibration, and harshness associated with the intake manifold and its inlet may be reduced without additional weight, cost, or complexity.

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: An intake manifold for a multicylinder internal combustion engine includes a number of inlet runners operatively connected with a mounting flange. A sealing region circumscribes only an outer periphery of the mounting flange and does not extend between adjacent ones of the intake runners. The sealing region includes a continuous groove formed in the mounting flange and a sealing composition applied to the groove.

Abstract: An intake air control apparatus comprises an intake air path connected to a combustion chamber, and an intake airflow control device having a first opening deviated in one direction when viewed from an axial direction of the intake air path by partially closing a cross-section of a flow path of the intake air path, and that controls distribution of an intake airflow by deviating the intake airflow downstream of the first opening to a side in which the first opening is formed, the intake airflow control device having a second opening of smaller opening area than that of the first opening, and deviated in an opposite side to the side in which the first opening is formed and at a location away from an intake air path wall.

Abstract: An internal combustion engine intake device includes an intake collector and a first air induction pipe. The intake collector includes a first collector space and a second collector space. The first air induction pipe extends diagonally downward from an upstream side of the intake collector with respect to a horizontal direction of the vehicle. The first air induction pipe includes a first air induction space and a second air induction space. The intake collector and the first air induction pipe are configured and arranged such that a first boundary plane defined between the first collector space and the first air induction space is substantially perpendicular to a direction of an intake air flow from the first air induction space into the first collector space and the first boundary plane is substantially coplanar with a second boundary plane defined between the second collector space and the second air induction space.

Abstract: An engine intake manifold includes a casing having a plurality of air intake passages, and a plurality of valve plates, wherein each valve plate is disposed in one of the air intake passages to control airflow through the air intake passage. The valve plates are connected to a common valve shaft for rotation between an open position and a closed position. The engine intake manifold may further include an actuator that is mounted to the casing or to the valve shaft via a snap connection, and is rotationally connected to the valve shaft to allow the actuator to rotate the valve shaft.

Abstract: An intake system for an internal combustion engine in which the inflow characteristic of a mixture of gas is varied by a partition wall provided replaceably in an intake port opening, whereby the output characteristic of the internal combustion engine is regulated to a desired condition, and a vehicle having appropriate operating characteristics is provided. A replaceable partition wall A is mounted in an intake port opening 1a of an internal combustion engine. The partition wall A is composed of a plate P that differs in length as compared to other plates. The plate P is inserted into an upper-lower pair of grooves provided in the intake port opening 1a, whereby the plate P is replaceably mounted, and the inflow characteristic of a mixture of gas sucked in through the intake port opening 1a is varied by replacement of the plate P thus mounted, whereby the output characteristic of the internal combustion engine is regulated to a desired condition.

Abstract: An air induction system for an engine is provided with a flow meter to sense a flow amount of air introduced into a combustion chamber of the engine. The air induction system includes an improved construction that can protect the flow meter from rigorous environment. The construction includes a primary intake passage through which the air flows. A secondary intake passage extends from the primary passage to communicate with the primary passage. At least a portion of the air flows through the secondary passage. A filter is disposed in the secondary passage to filtrate the portion of the air. The flow meter is positioned downstream of the filter in the secondary passage.