초록 ▼

A distributorless ignition system is shown having a timing controller that is responsive to one cylinder of the engine reaching top dead center for predicting the times at which one or more subsequent cylinders in the firing order should enter dwell and fire based upon the current engine speed, curr

A distributorless ignition system is shown having a timing controller that is responsive to one cylinder of the engine reaching top dead center for predicting the times at which one or more subsequent cylinders in the firing order should enter dwell and fire based upon the current engine speed, current battery voltage and the time interval between one cylinder reaching top dead center and the preceding cylinder reaching top dead center. At low operating speeds the controller plans for the firing of a cylinder utilizing triple precision calculations. At midrange speeds and high speeds, however, the controller utilizes double precision calculatons. At very high speeds, the controller of the present invention plans the firing of two or more cylinders at the same time forcing the cylinders into overlapping dwell. Knock is reduced while optimizing the amount of power obtained from each cylinder by utilizing various knock algorithms depending upon the current speed of the engine when the potential knock is detected.

대표청구항 ▼

In a marine craft distributorless ignition system with an engine having a plurality of cylinders and a plurality of ignition coils, each cylinder being coupled to an ignition coil and drive means coupled to said ignition coils for initiating for each cylinder in a firing order a dwell period in resp

In a marine craft distributorless ignition system with an engine having a plurality of cylinders and a plurality of ignition coils, each cylinder being coupled to an ignition coil and drive means coupled to said ignition coils for initiating for each cylinder in a firing order a dwell period in response to a first control signal to pull current through said cylinder\s coil creating a field, said drive means collapsing said field in response to a second control signal to generate a spark firing said cylinder, a controller for controlling the timing of firing of said cylinder comprising: means for sensing when each of said cylinders reaches top dead center to provide a signal representative thereof; means responsive to said sensing means for determining the speed of said engine; means responsive to said determined engine speed for determining advance; a battery for providing power to said systems; means responsive to the voltage of said battery for determining a dwell time; means responsive to said sensing means for determining the interval between a first cylinder reaching top dead center and a preceding cylinder reaching top dead center; and firing time determining means being responsive to said interval and said advance for determining a delay time until said spark should be generated to fire said subsequent cylinder and being responsive to said delay time to spark and said dwell time for determining a delay time until said dwell period should be initiated.