CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

• US 20200132006A1
• Filed: 09/17/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: ASHIZAWA, Takeshi
• Granted Patent: US 10,837,381 B2
• Time in Patent Office: Days
• CPC Class Codes: F02D 41/0082 per groups or banks F02D41/0087 takes precedence
• CPC Class Codes: F02N 19/005 Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
• CPC Class Codes: F02P 15/08 having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
• CPC Class Codes: F02P 5/1506 with particular means during starting
• CPC Class Codes: F02P 9/007 by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition

Abstract

In the start control, the first and second discharge actions of the ignition apparatuses are controlled. The first discharge action is performed to ignite the mixed gas in the multiple cylinders. The second discharge action is performed to generate the ozone. The first discharge action is performed immediately after the start of the cranking. The first discharge action is performed in the cylinders which belongs to the first and second cylinder groups. The second discharge action is performed before the start of the cranking. The second discharge action is performed in at least one cylinder which belongs to the second cylinder group. The multiple cylinders belong to the first or second cylinder group. The multiple cylinders are classified into the first or second cylinder group based on the crank angle section S_CA set for each cylinder.

Claims

1. A control system for internal combustion engine, comprising:

an internal combustion engine including multiple cylinders;

ignition apparatuses which are provided to each of the multiple cylinders; and

a controller which is configured to control discharge actions of the ignition apparatuses for each cylinder,

wherein the discharge actions include a first discharge action for igniting mixed gas in the multiple cylinders and a second discharge action for generating ozone,

wherein the controller is further configured to perform start control of the internal combustion engine,

wherein, in the start control, the controller is configured to;

classify the multiple cylinders into a first group or a second cylinder group;

control the ignition apparatus of at least one cylinder of the multiple cylinders which is classified into the first cylinder group such that the second discharge action is not performed before the start of the first discharge action; and

control the ignition apparatus of at least one cylinder of the multiple cylinders which is classified into the second cylinder group such that the second discharge action is performed before the start of the first discharge action,

wherein the at least one cylinder which belongs to the first cylinder group is at least one cylinder of the multiple cylinders in which an initial combustion of the mixed gas occurs after passing through a crank angle section which is set on an end side of an exhaust stroke of the same cylinder,

wherein the at least one cylinder which belongs to the second cylinder group is at least one cylinder of the multiple cylinders in which the initial combustion of the mixed gas occurs before passing through a crank angle section which is set on the end side of the exhaust stroke of the same cylinder.

2. The control system according to claim 1, further comprising injectors which are configured to supply fuel into each of the multiple cylinders,

wherein the controller is further configured to perform stop control of the internal combustion engine,

wherein, in the stop control, the controller is configured to control the ignition apparatus and the injector of a predetermined cylinder of the multiple cylinders such that a piston of the predetermined cylinder stops in a crank angle section which is set on the end side of the exhaust stroke of the predetermined cylinder,

wherein, in the start control, the controller is configured to control the ignition apparatus of the predetermined cylinder such that the first discharge action in the predetermined cylinder starts before passing through the crank angle section which is set on the end side of the exhaust stroke of the predetermined cylinder.