Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1997-03-13
1999-02-09
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123480, 440 1, F02D 4104
Patent
active
058681183
ABSTRACT:
A fuel injection control device for outboard motors optimizes the air-fuel ratio when trim is applied to the outboard motor, especially those with two-cycle engines. In such an outboard motor, engine speed, throttle setting, engine boost pressure, engine temperature, intake air temperature, and/or other variables are detected and a basic fuel injection volume determined. Fuel is supplied to each of the engine's cylinders according to the detected values. A trim angle detecting means is used to indicate trim angle. During low-speed operation, the trim angle is detected, and the magnitude of a change in the trim angle is calculated. The magnitude of the change in the trim angle is used to estimate the residual fuel volume within the engine. The estimated value is used to apply correction to the basic fuel injection volume following the change in the trim angle. As a result, during low-speed operation, an optimal air-to-fuel ratio can be obtained when the trim of the outboard device is changed.
REFERENCES:
patent: 5073133 (1991-12-01), Inoue
Patent Abstracts of Japan, abstract for JP 8-226347 (Hashimoto), Sep. 3, 1996.
Dolinar Andrew M.
Suzuki Motor Corporation
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