초록 ▼

An engine management system for 4-cycle engines includes a processing means and utilizes various inputs from sensors operatively connected to the engine for the purpose of providing the correct fuel/air ratio or spark ignition angle for the engine in a manner whereby the transient response is fast.

An engine management system for 4-cycle engines includes a processing means and utilizes various inputs from sensors operatively connected to the engine for the purpose of providing the correct fuel/air ratio or spark ignition angle for the engine in a manner whereby the transient response is fast. The engine management system utilizes the rotational speed information that is obtained from a magneto or speed sensor to determine the speed of each engine revolution. The system effectively solves many of the fuel/air ratio problems that are caused by load transients occurring on the engine. By comparing such high pass filtered speeds of selected revolutions, the system is able to determine the inferred engine intake air flow. By using measured system rotational inertia compensation factors for the engine together with the inferred intake air flow, the system can accurately determine the amount of fuel to be fed to the engine for proper operation.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for generating an output signal for controlling an operating parameter of an internal combustion engine having a combustion chamber, a rotating crankshaft, the engine being of the type which has alternating nonpower cycle and power cycle revolutions, wherein fue

[ What is claimed is:] [1.] Apparatus for generating an output signal for controlling an operating parameter of an internal combustion engine having a combustion chamber, a rotating crankshaft, the engine being of the type which has alternating nonpower cycle and power cycle revolutions, wherein fuel is fed to and ignited in the combustion chamber engine during the power cycle revolutions, said apparatus comprising:means for determining the cyclic engine speed of selected engine revolutions;means for determining a difference value between the cyclic engine speed of one of said nonpower cycle revolutions and the cyclic engine speed of a successive power cycle revolution and a difference value between the cyclic engine speed of the said power cycle revolutions and the cyclic engine speed of a successive nonpower cycle revolution; and,means for generating the output signal that is a function of the larger of said determined difference values.