Internal combustion engine control device, internal combustion engine control method, and vehicle

Patent metadata

Field	Value
Publication number	US-2020109680-A1
Application number	US-201916591914-A
Country	US
Kind code	A1
Filing date	Oct 3, 2019
Priority date	Oct 4, 2018
Publication date	Apr 9, 2020
Grant date	—

Abstract

An internal combustion engine control device includes a combustion degree of stoppage determination unit which determines whether stoppage of combustion of an internal combustion engine has reached a threshold degree, and an internal combustion engine control unit which performs a normal control in the case that the combustion of the engine is resumed in a state where stoppage of combustion has not reached the threshold degree, and performs a soot suppression control in the case that the engine combustion is resumed in a state where stoppage of combustion has reached the threshold degree. In the soot suppression control, the split injection or the single injection is carried out within the predetermined stroke, and the engine control unit causes a fuel injection timing in the single injection of the soot suppression control to be delayed with respect to the fuel injection timing in the single injection of the normal control.

First claim

What is claimed is:

1 . An internal combustion engine control device configured to control an internal combustion engine which is configured to selectively perform a single injection in which fuel is injected into a combustion chamber a single time within a predetermined stroke, and a split injection in which the fuel is injected into the combustion chamber a plurality of times within the predetermined stroke, the internal combustion engine control device comprising:
a combustion degree of stoppage determination unit configured to determine whether or not stoppage of combustion of the internal combustion engine has reached a threshold degree; and an internal combustion engine control unit configured to perform a normal control in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of combustion has not reached the threshold degree, and to perform a soot suppression control to suppress generation of soot in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of combustion has reached the threshold degree; wherein, in the soot suppression control, the split injection or the single injection is carried out within the predetermined stroke; and the internal combustion engine control unit causes a fuel injection timing in the single injection of the soot suppression control to be delayed with respect to the fuel injection timing in the single injection of the normal control.

2 . The internal combustion engine control device according to claim 1 , wherein, in a case that the soot suppression control is carried out in a state in which a predetermined condition is satisfied in which a speed of rotation of the internal combustion engine is greater than or equal to a first speed of rotation and less than a second speed of rotation, and an amount of air that is drawn into the combustion chamber is greater than or equal to a threshold amount of air corresponding to the speed of rotation of the internal combustion engine, the internal combustion engine control unit performs a control in a manner so that the split injection is carried out.

3 . The internal combustion engine control device according to claim 2 , wherein, in a case that the soot suppression control is carried out in a state in which the predetermined condition is not satisfied, the internal combustion engine control unit performs a control in a manner so that the single injection is performed.

4 . The internal combustion engine control device according to claim 1 , wherein the internal combustion engine control unit performs the normal control in a case that a total amount of combustion of the internal combustion engine has reached a predetermined degree in the soot suppression control after combustion of the internal combustion engine is resumed.

5 . The internal combustion engine control device according to claim 2 , wherein the internal combustion engine control unit performs the normal control in a case that a total amount of combustion of the internal combustion engine has reached a predetermined degree in the soot suppression control after combustion of the internal combustion engine is resumed.

6 . The internal combustion engine control device according to claim 3 , wherein the internal combustion engine control unit performs the normal control in a case that a total amount of combustion of the internal combustion engine has reached a predetermined degree in the soot suppression control after combustion of the internal combustion engine is resumed.

7 . The internal combustion engine control device according to claim 1 , wherein the fuel is directly injected into the combustion chamber of the internal combustion engine.

8 . The internal combustion engine control device according to claim 1 , wherein, in a vehicle equipped with the internal combustion engine, there is further provided another vehicle drive source that differs from the internal combustion engine.

9 . An internal combustion engine control method for controlling an internal combustion engine which is configured to selectively perform a single injection in which fuel is injected into a combustion chamber a single time within a predetermined stroke, and a split injection in which the fuel is injected into the combustion chamber a plurality of times within the predetermined stroke, the internal combustion engine control method comprising:
a step of determining whether or not stoppage of combustion of the internal combustion engine has reached a threshold degree; and a step of performing a normal control in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of combustion has not reached the threshold degree, and performing a soot suppression control to suppress generation of soot in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of combustion has reached the threshold degree; wherein, in the soot suppression control, the split injection or the single injection is carried out within the predetermined stroke; and a fuel injection timing in the single injection of the soot suppression control is delayed with respect to the fuel injection timing in the single injection of the normal control.

Assignees

• Honda Motor Co Ltd

Inventors

• Hashimoto Eiji
• Fukuoka Naoki
• Yoshiiri Masayuki
• Takada Kengo
• Hashizume Mitsuo

Classifications

• F02D41/126 Primary

  transitional corrections at the end of the cut-off period · CPC title

• F02D41/401

  Controlling injection timing (F02D41/402 takes precedence) · CPC title

• F02D2200/021

  Engine temperature · CPC title

• F02D41/402

  Multiple injections · CPC title

• F02D41/182

  for the control of a fuel injection device · CPC title