Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-12-27
2005-12-27
Kwon, John T. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S492000, C701S110000
Reexamination Certificate
active
06978768
ABSTRACT:
To provide an acceleration control method for an engine, which determines the accelerating state appropriately without a sensor, a mechanism, or the like specially added for determining the accelerating state and performs suitable acceleration control, while it prevents acceleration misdetermination at engine start or at an extremely low engine speed to improve engine startability and drivability at an extremely low engine speed.An acceleration control method for a four-stroke engine, in which a pulse is generated for every predetermined crank angle for detecting a crank angle of the engine, a transient state of the engine is determined by detecting the pulse and by detecting the intake air pressure in the intake passage on a downstream side of a throttle valve of the engine, and the acceleration control is performed according to the state of the engine, is characterized in that the acceleration control is prohibited on condition that the engine state is at engine start or at an extremely low engine speed, and in that the acceleration control is allowed otherwise.
REFERENCES:
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Nakamura Tomoji
Yamashita Toshihiko
Hogan & Hartson LLP
Kwon John T.
Yamaha Hatsudoki Kabushiki Kaisha
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