Air induction system for multi-cylinder engine

An internal combustion engine comprising an engine body, a plurality of moveable members moveable relative to the engine body, the engine body and the moveable members together defining a plurality of combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including a plurality of intake passages corresponding to the respective combustion chambers, the intake passages arranged next to each other, a plenum chamber coupled with the intake passages, the plenum chamber being divided into a first sub-chamber and a second sub-chamber, a first group of the intake passages communicating with the first sub-chamber and a second group of intake passages communicating with the second sub-chamber, at least one intake passage of the second group of intake passages being at least partially disposed between at least two intake passages of the first group of intake passages.

An internal combustion engine comprising an engine body, a plurality of moveable members moveable relative to the engine body, the engine body and the moveable members together defining a plurality of combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including a plurality of intake passages corresponding to the respective combustion chambers, a plenum chamber coupled with the intake passages, the air being delivered to each one of the combustion chambers from the plenum chamber through each one of the intake passages in a predetermined order, said plenum chamber being divided into a plurality of sub-chambers, the air induction system additionally including an air inlet passage extending upstream of the plenum chamber, at least the most-downstream portion of the air inlet passage being divided into a plurality of sub-passages, each sub-passage being contiguously coupled with a respective one of the sub-chambers.

An internal combustion engine comprising an engine body, at least four moveable members moveable relative to the engine body, the engine body and the moveable members together defining at least four combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including at least four intake passages corresponding to the respective combustion chambers, the intake passages being disposed next to one another, and a plenum chamber coupled with the intake passages, the plenum chamber being divided into at least first and second sub-chamber, the intake passages being categorized into first and second groups, each one of the groups including two of the intake passages which each lie next to an intake passage of another group, the intake passages of the first group being connected with the first sub-chamber, the intake passages of the second group being connected with the second sub-chamber.

An internal combustion engine comprising an engine body, a plurality of moveable members moveable relative to the engine body, the engine body and the moveable members together defining a plurality of combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including a plurality of intake passages corresponding to the respective combustion chambers, and first and second plenum chambers coupled with the intake passages, the intake passages being categorized into first and second groups, the first group being connected with the first plenum chamber, and the second group being connected with the second plenum chamber, the first group having at least one intake passages that is arranged on the engine such that at least a portion of the one intake passage is interposed between two intake pages of the second group.

An internal combustion engine comprising an engine body, a plurality of moveable members moveable relative to the engine body, the engine body and the moveable members together defining a plurality of combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including a plurality of intake passages corresponding to the respective combustion chambers, a plenum chamber coupled with the intake passages, the air being delivered to each one of the combustion chambers from the plenum chamber through each one of the intake passages in a preset order, the plenum chamber being entirely divided into two sub-chambers so as to inhibit air flow between the sub-chambers, and the intake passages being connected to the sub-chambers in a manner that alternates air being drawn from each sub-chamber.

An internal combustion engine comprising an engine body, at least four moveable members moveable relative to the engine body, the engine body and the moveable members together defining at least four combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including at least four intake passages corresponding to the respective combustion chambers, a plenum chamber coupled with the intake passages, the air being delivered to each one of the combustion chambers from the plenum chamber through each one of the intake passages in preset order, the plenum chamber being entirely divided into first and second sub-chambers so as to inhibit air flow between the sub-chambers, a first group of the intake passages being connected with the C first sub-chamber and a second group of the intake passages being connected with the other sub-chamber, whereby the preset order of air delivery through the intake passages alternates between using an intake passage of the first group and an intake passage of the second group.

An internal combustion engine comprising an engine body, a plurality of moveable members moveable relative to the engine body, the engine body and the moveable members together defining a plurality of combustion chambers, and an air induction system arranged to introduce air into the combustion chambers, the air induction system including a plurality of intake passages corresponding to the respective combustion chambers, a plenum chamber coupled with the intake passages, the air being delivered to each one of the combustion chambers from the plenum chamber through each one of the intake passages in a preset order, said plenum chamber being divided into at least two sub-chambers, one of the sub-chamber being positioned farther from the engine body than the other sub-chamber.