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US 5,000,130 AGranted
Intake system for multi cylinder engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTetsuro Yamada
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AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTetsuro Yamada
Estimating the term…
A number of embodiments of induction systems for internal combustion engines having plural combustion chambers with each being served by an intake passage having a respective throttle valve. First and second plenum chambers communicate with the intake passage through relatively long and relatively short conduits for improving low and high speed running. A pressure regulating chamber is also provided. This communicates with all of the intake passages between the throttle valve and the combustion chamber. A first control valve is provided in each of the communicating passageways for controlling the communication of the pressure regulating chamber with the intake passage. A second conduit interconnects the pressure regulating chamber only with one of the intake passages upstream of the throttle valve and a second control valve controls the flow through this conduit. Various control strategies and geometric relationships are disclosed.
An induction system for an internal combustion engine having a combustion chamber, an intake passage serving said combustion chamber, a throttle valve for controlling the flow through said intake passage, a pressure regulating chamber, first conduit means extending from said pressure regulating chamber to said intake passage between said throttle valve and said combustion chamber, first control valve means for controlling the flow through said first conduit means, means for opening said first control means when said throttle valve is in a low speed condition, second conduit means interconnecting said intake passage upstream of said throttle valve with said pressure regulating chamber, second control valve means in said second conduit means for controlling the flow therethrough, and means for controlling the position of said second control valve means in response to the position of said throttle valve.
Dependencies are inferred from the claim text.