Automobile with fuel injection controller

Patent metadata

Field	Value
Publication number	US-9759150-B2
Application number	US-201615041354-A
Country	US
Kind code	B2
Filing date	Feb 11, 2016
Priority date	Feb 16, 2015
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

On start of an engine, a difference ΔPm between a first intake pipe pressure Pm 1 and a second intake pipe pressure Pm 2 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.

First claim

The invention claimed is:

1. 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.

2. The automobile according to claim 1 ,
wherein the predetermined condition is satisfied when a specific difference state that the difference is equal to or less than the predetermined value continues over a predetermined number of strokes of the engine or for a predetermined time period.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ohori Shinya
• Ito Yoshiaki
• Yamazaki Makoto

Classifications

• F02D2200/0402

  the parameter being determined by using a model of the engine intake or its components · CPC title

• F02M61/145

  the injection nozzle opening into the air intake conduit · CPC title

• F02D41/062

  for starting (F02D41/061 takes precedence) · CPC title

• F02D2200/0404

  Throttle position · CPC title

• F02D41/30

  Controlling fuel injection {(F02D41/182, F02D41/24 take precedence)} · CPC title