Burning control system for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsOsamu Takii, Motoshi Baba, Takao Mori, Sumito Abe
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Abstract
An internal combustion engine and method for operating the engine wherein a leaner than stoichiometric air/fuel ratio is maintained under all running conditions. The desired torque curve is obtained by increasing the amount of boost generated to the intake air charge without enrichening the air/fuel mixture. In addition, an anti-knocking system is incorporated that avoids knocking by retarding the spark advance and, at the same time, providing a leaning in the air/fuel mixture.
Claims21
An internal combustion engine having at least one combustion chamber, an induction system for delivering at least an air charge to said combustion chamber, a charge forming system for delivering at least a fuel charge to said combustion chamber, boost means for boosting the pressure of said air charge supplied to said combustion chamber by said induction system, means for sensing engine running conditions, and a control for said charge forming system and said boost means for maintaining a leaner than stoichiometric air/fuel ratio under all running conditions and for varying the pressure supplied by said boost means for producing the desired torque without necessitating enrichment of the air/fuel ratio so that the torque is varied primarily by varying the boost pressure.
A method of operating an internal combustion engine having at least one combustion chamber, an induction system for delivering at least an air charge to said combustion chamber, a charge forming system for delivering at least a fuel charge to said combustion chamber, boost means for boosting the pressure of said air charge supplied to said combustion chamber by said induction system, and means for sensing engine running conditions, comprising the steps of maintaining a leaner than stoichiometric air/fuel ratio under all running conditions and varying the pressure supplied by said boost means for producing the desired torque without necessitating enrichment of the air/fuel ratio so that the torque is varied primarily by varying the boost pressure.
Dependencies are inferred from the claim text.