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US 4,766,853 AGranted
Intake passage for multi-cylinder engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTakeshi Iwanami
Life of this patent
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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTakeshi Iwanami
Estimating the term…
An improved induction system for a V type engine that is tuned for substantially all running conditions and which is nevertheless compact in construction. The system includes a pair of plenum chambers each disposed adjacent one of the cylinder heads of the engine. Each cylinder head has at least two intake passages serving the respective cylinder bores and a first conduit extends from the adjacent plenum chamber to one of the intake passages and a second conduit extends from the other of the plenum chambers to the other intake passage. The plenum chambers communicate with each other at their opposite ends to improve air flow and a common inlet opening serves each plenum chamber inlet. A throttle valve arrangement is also incorporated so that good performance is achieved under all running conditions. The throttle valve arrangement includes a throttle valve that controls the flow through the interconnecting passage.
An induction system for an internal combustion engine comprising at least two variable volume chambers each having at least one intake port for delivering a charge thereto, a plenum chamber, a first intake passage extending from said plenum chamber to the intake port of a first of said chambers, a second intake passage extending from said plenum chamber to the intake port of the other of said chambers, a flow control valve operable in response to an engine running characteristic for controlling the flow through said second intake passage, first and second atmospheric air inlets to said plenum chamber, and throttle valve means for controlling the flow into said plenum chamber through each of said atmospheric air inlets.
An induction system for an internal combustion engine having at least two cylinders, a first plenum chamber, a second plenum chamber, conduit means for delivering a charge from said plenum chambers to said cylinders for induction thereto, the improvement comprising a common atmospheric air inlet for each of said plenum chambers at one end thereof, an interconnecting passageway extending between the other end of said plenum chamber, a single throttle valve for controlling the flow into each of said plenum chambers through said common atmospheric inlet and a single throttle valve for controlling the flow through said interconnecting passageway.
Dependencies are inferred from the claim text.