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US 7,441,547 B2Granted
Method of feeding fuel to an engine, fuel feed amount control system of an engine, and motorcycle comprising fuel feed amount control system
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsNaoki Kawamura, Satoru Watabe
Life of this patent
Estimating the term…
Abstract
A method of feeding fuel to an engine, comprising the steps of determining whether or not the engine is decelerating based on a time-lapse change rate of an engine speed of the engine, and reducing an amount of the fuel to be fed to air taken into the engine from outside to less than a reference amount preset according to the engine speed when it is determined that the engine is decelerating.
Claims5
A fuel feed amount control system of an engine, comprising:
- an engine speed sensor configured to detect an engine speed of the engine;
- a fuel feeder configured to feed fuel to air taken into the engine from outside;
- at least one of a throttle opening degree sensor configured to detect an opening degree of a throttle valve and an air-intake pressure sensor configured to detect a pressure of the air taken into the engine;
- a controller configured to cause the fuel feeder to feed a predetermined amount of fuel to air, based on a signal received from the engine speed sensor;
- wherein the controller is configured to obtain a time-lapse change rate of the engine speed based on the signal received from the engine speed sensor, determine that the engine is decelerating based on the time-lapse change rate, and cause the fuel feeder to reduce a fuel feed amount to less than a reference amount preset according to the engine speed responsive to determining that the engine is decelerating;
- and
- wherein the controller is configured to determine that the engine is decelerating, based on the time-lapse change rate of the engine speed, the engine speed, and at least one of the throttle opening degree obtained from a signal received from the throttle opening degree sensor and the air-intake pressure obtained from a signal received from the air-intake pressure sensor.
4 more elements
A motorcycle comprising:
- a fuel feed amount control system of an engine including:
- an engine speed sensor configured to detect an engine speed of an engine;
- a fuel feeder configured to feed fuel to air taken into the engine from outside;
- at least one of a throttle opening degree sensor configured to detect an opening degree of a throttle valve and an air-intake pressure sensor configured to detect a pressure of the air taken into the engine;
- a controller configured to cause the fuel feeder to feed a predetermined amount of fuel to air, based on a signal received from the engine speed sensor;
- wherein the controller is configured to obtain a time-lapse change rate of the engine speed based on the signal received from the engine speed sensor, determine that the engine is decelerating based on the time-lapse change rate, and cause the fuel feeder to reduce a fuel feed amount to less than a reference amount preset according to the engine speed responsive determining that the engine is decelerating;
- and
- wherein the controller is configured to determine that the engine is decelerating, based on the time-lapse change rate of the engine speed, the engine speed, and at least one of the throttle opening degree obtained from a signal received from the throttle opening degree sensor and the air-intake pressure obtained from a signal received from the air-intake pressure sensor.
5 more elements
Dependencies are inferred from the claim text.