Control device of vehicle

Patent metadata

Field	Value
Publication number	US-2016245196-A1
Application number	US-201615046047-A
Country	US
Kind code	A1
Filing date	Feb 17, 2016
Priority date	Feb 19, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

The invention relates to a control device of a vehicle provided with a multi-cylinder internal combustion engine comprising a catalyst in an exhaust passage. When a state of an ignition switch has been changed from an on-state to an off-state and a rotation of the engine has stopped, the control device causes a fuel injector to inject fuel into a combustion chamber of a particular cylinder in which an intake valve is closed and an exhaust valve is open and causes an ignition device to ignite the fuel.

First claim

What is claimed is:

1 . A control device of a vehicle, comprising:
a multi-cylinder internal combustion engine having,
at least two combustion chambers,
at least two fuel injectors provided corresponding to the combustion chambers, respectively, each of the fuel injectors injecting fuel directly into the corresponding combustion chamber,
at least two ignition devices provided corresponding to the combustion chambers, respectively, each of the ignition devices including an ignition plug,
at least two intake valves provided corresponding to the combustion chambers, respectively,
at least two exhaust valves provided corresponding to the combustion chambers, respectively, and
an exhaust passage connected to the combustion chambers;
an ignition switch; and a catalyst provided in the exhaust passage, the catalyst having an oxidation function, the control device comprising a control section for controlling fuel injections carried out by the fuel injectors and fuel ignitions carried out by the ignition devices, wherein the control section is configured to execute a first control when a particular execution condition is satisfied, the particular execution condition being a condition that a state of the ignition switch has been changed from an on-state to an off-state and a rotation of the engine has stopped, and the first control being a control for causing the fuel injector to inject fuel into the combustion chamber of a particular cylinder in which the intake valve is closed and the exhaust valve is open and causing the ignition device to ignite the fuel.

2 . The control device of the vehicle as set forth in claim 1 , wherein the vehicle further comprises a brake pedal, and
the control section is configured: to execute an engine stop control for causing the fuel injectors to stop injections of fuel to stop a rotation of the engine when an engine stop condition is satisfied, the engine stop condition being a condition that the state of the ignition switch corresponds to the on-state, the brake pedal is depressed and a speed of the vehicle is equal to or smaller than a predetermined speed; and to determine that the particular execution condition is satisfied when the state of the ignition switch is changed from the on-state to the off-state after the rotation of the engine stops.

3 . The control device of the vehicle as set forth in claim 2 , wherein the control section is configured:
to start an operation of the engine by causing the fuel injector to inject fuel into the combustion chamber of a cylinder, a stroke of which corresponds to a combustion stroke, and the ignition device to ignite the fuel when a start of the operation of the engine is requested after the engine stop control is started and before the rotation of the engine stops; and to execute a fuel pressure increase control for increasing a fuel pressure when the engine stop condition is satisfied, the fuel pressure being a pressure of fuel supplied to the fuel injectors.

4 . The control device of the vehicle as set forth in claim 2 , wherein the control section is configured to execute the first control to cause the fuel injector to inject an amount of fuel determined on the basis of an amount of air in the combustion chamber of the particular cylinder.

5 . The control device of the vehicle as set forth in claim 1 , wherein the control section is configured:
to execute the first control when the particular execution condition is satisfied and a fuel pressure, which is a pressure of the fuel supplied to the fuel injectors, is higher than a permissible fuel pressure; and not to execute the first control when the particular execution condition is satisfied and the fuel pressure is equal to or lower than the permissible fuel pressure.

6 . The control device of the vehicle as set forth in claim 1 , wherein the control section is configured to execute a second control when the control section predicts that the fuel pressure after the execution of the first control is higher than a permissible fuel pressure, the second control being a control for causing the fuel injector to inject an amount of the fuel capable of decreasing the fuel pressure to below the permissible fuel pressure at a predetermined timing capable of causing the fuel injected from the fuel injector by the first control to move into a flow of a combustion gas produced by burning of the fuel to the exhaust passage without blowing off the burning of the fuel.

7 . The control device of the vehicle as set forth in claim 6 , wherein the control section is configured to determine, as the predetermined timing, a timing within a particular period including a timing of completion of the burning of the fuel injected from the fuel injector by the first control.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kojima Susumu
• Suzuki Yusuke

Classifications

• F02D41/3836

  Controlling the fuel pressure · CPC title

• F02D41/042 Primary

  for stopping the engine · CPC title

• F02D37/02 Primary

  one of the functions being ignition · CPC title

• F02D41/123

  the fuel injection being cut-off · CPC title

• F02P5/045

  combined with electronic control of other engine functions, e.g. fuel injection (in general F02D37/02) · CPC title