Fuel injection control for engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorMasahiko Kato
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Abstract
A feedback control system for an internal combustion engine, particularly as utilized in an outboard motor. An oxygen sensor outputs a signal indicative of the fuel-air ratio for controlling the charge-forming system of the engine to maintain the desired fuel-air ratio. A series of filters, each tuned for a different frequency and a different engine speed, are interposed between the sensor and the control for reducing the effect of noise.
Claims16
An internal combustion engine comprised of at least one combustion chamber, an induction system for delivering an air charge to said combustion chamber, a charge-forming system for delivering a fuel charge to said combustion chamber, the fuel-air charge in said combustion chamber being ignited therein, an exhaust system for discharging combustion products from said combustion chamber to the atmosphere, a nonlinear sensor for sensing when the fuel-air ratio changes between rich and lean, a feedback control for controlling at least one of said charge-forming and induction systems for maintaining the desired fuel-air ratio in response to the output of said sensor, and at least two fixed filters tuned for two different speeds for filtering the output from said sensor at at least some running conditions.
Dependencies are inferred from the claim text.