Automobile
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsShinya OHORI, Yoshiaki ITO, Makoto YAMAZAKI
Life of this patent
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Abstract
On start of an engine, a difference ΔPm between a first intake pipe pressure Pm1 and a second intake pipe pressure Pm2 is computed. Reduction correction of wall surface deposition correction is prohibited until the state that the difference ΔPm is equal to or less than a reference value ΔPmref continues over a predetermined number of strokes nref of the engine. After the state that the difference ΔPm is equal to or less than the reference value ΔPmref continues over the predetermined number of strokes nref of the engine, permission is given for the reduction correction.
Claims2
An automobile, comprising:
- an engine that is configured to have a fuel injection valve that injects a fuel into an intake pipe;
- and
- a controller that is configured to set a target amount of fuel injection by providing a base amount of fuel injection with increase correction or reduction correction corresponding to a change in amount of the fuel depositing on a wall surface of the intake pipe and to control the engine to cause the fuel of the target amount of fuel injection to be injected by the fuel injection valve, wherein
- the controller prohibits the reduction correction until satisfaction of a predetermined condition since a start of the engine and gives permission for the reduction correction on satisfaction of the predetermined condition, wherein
- the predetermined condition is a condition satisfied when a difference between a first intake pipe pressure and a second intake pipe pressure becomes equal to or less than a predetermined value, wherein the first intake pipe pressure is a current pressure in the intake pipe estimated using a throttle-passing air flow that denotes a flow rate of the air passing through a throttle valve per unit time at a current throttle position, and the second intake pipe pressure is a pressure in the intake pipe when the throttle-passing air flow is equal to an in-cylinder intake air flow that denotes a flow rate of the air flowing into a combustion chamber per unit time.
Dependencies are inferred from the claim text.