Method of operating vehicular internal combustion engine of an intermittent-operation type
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKeiko Hasegawa, Toshio Inoue
Life of this patent
Estimating the term…
Abstract
A temporary increase in an amount of fuel at start of an engine is controlled on the basis of an estimated amount of fuel that has adhered to the perimeter of intake ports at start of the engine. If the engine is restarted soon after being stopped, the increase in the amount of fuel is reduced by a correction amount that is reduced gradually with the lapse of time. If only a considerably short length of time has elapsed, the amount of fuel is not increased. If the engine is started twice within a short period, the increase in the amount of fuel at the latter start of the engine changes continuously from the increase in the amount of fuel at the former start of the engine.
Claims20
A method of operating a vehicular internal combustion engine which is designed to increase an amount of fuel temporarily at start, wherein:
- if a time that elapses, from a timing when the internal combustion engine is started through a timing when the internal combustion engine is stopped temporarily and then to a timing when the internal combustion engine is restarted, is shorter than a predetermined value, the method comprising the step of:
- reducing an initial value of an increase in an amount of fuel at restart of the internal combustion engine from a predetermined standard value.
A method of operating a vehicular internal combustion engine which is designed to increase an amount of fuel temporarily at start, wherein:
- if an amount of air that flows through intake ports of the internal combustion engine, from a timing when the internal combustion engine is started through a timing when the internal combustion engine is stopped temporarily and then to a timing when the internal combustion engine is restarted, is smaller than a predetermined value, the method comprising the step of:
- reducing an initial value of an increase in an amount of fuel at restart of the internal combustion engine from a predetermined standard value.
A method of operating a vehicular internal combustion engine which is designed to increase an amount of fuel temporarily at start, the method comprising the step of:
- reducing an initial value of an increase in an amount of fuel at restart of the internal combustion engine from a predetermined standard value based upon (i) a time that elapses from a timing when the internal combustion engine is started to a timing when the internal combustion engine is stopped temporarily, and (ii) a timing that elapses from the time when the internal combustion engine is stopped temporarily and a timing when the internal combustion engine is restarted.
A method of operating a vehicular internal combustion engine which is designed to increase an amount of fuel temporarily at start, wherein:
- if a time that elapses, from a timing when the internal combustion engine is stopped to a timing when the internal combustion engine is restarted, is shorter than a predetermined value, the method comprising the step of:
- refraining from increasing the amount of fuel at restart of the internal combustion engine.
Dependencies are inferred from the claim text.