Engine control system and method
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsMichihisa Nakamura, Noritaka Matsuo
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Abstract
A number of embodiments of engine controls and engine control methods that employ instantaneous rate of combustion is the combustion chamber at a sensed parameter. Rate of combustion is determined by a linear equation based upon data arrived from combustion chamber pressures. The system is adapted to operate under different control modes so as to provide specific control for normal running, lean burn, maximum torque, cold starting, transient conditions, and/or knock control. The desired rate of combustion is achieved by engine control adjustments.
Claims90
A method for controlling an internal combustion engine having at least one chamber the volume of which varies cyclically during operation and in which combustion occurs during a portion of a complete cycle of operation, an induction system for delivering an air charge to said chamber, a fuel charging system for delivering a fuel charge to said chamber for combustion therein, an exhaust system for discharging combustion products from said chamber, said method comprising the steps of sensing the rate of combustion in said chamber at at least one specific volume of said chamber, comparing at least one of the measured rate of combustion and the specific volume with a target value from a map of such values, and adjusting at least one of said systems in a direction to establish the target value of at least the rate of combustion or the relative volume.
An internal combustion engine having at least one chamber the volume of which varies during a single cycle of operation and in which combustion occurs during a portion of the cycle, an induction system for delivering an air charge to said chamber, a fuel charging system for delivering a fuel charge to said chamber for combustion therein, an exhaust system for discharging combustion products from said chamber, means for sensing the rate of combustion in said chamber at at least one specific volume of said chamber, means for comparing at least one of the measured rate of combustion and the specific volume with a target value, and means for adjusting at least one of said systems in a direction to establish the target value.
Dependencies are inferred from the claim text.