US 12,305,585 B2
Startup control method for in-cylinder direct injection spark ignition internal combustion engine, and internal combustion engine system
Yuusuke Sakurai, Kanagawa (JP); Kazuki Tanzawa, Kanagawa (JP); and Yoshikatsu Matsuda, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
Filed on Jun. 13, 2024, as Appl. No. 18/742,309.
Claims priority of application No. 2023-102153 (JP), filed on Jun. 22, 2023.
Prior Publication US 2024/0426254 A1, Dec. 26, 2024
Int. Cl. F02D 41/06 (2006.01); F01N 3/20 (2006.01); F02D 41/00 (2006.01); F02D 41/02 (2006.01); F02D 41/38 (2006.01); F02D 41/40 (2006.01); F02P 5/15 (2006.01); F01N 3/10 (2006.01); F01N 11/00 (2006.01)
CPC F02D 41/064 (2013.01) [F01N 3/2006 (2013.01); F02D 41/0002 (2013.01); F02D 41/024 (2013.01); F02D 41/0245 (2013.01); F02D 41/3836 (2013.01); F02D 41/40 (2013.01); F02P 5/1506 (2013.01); F01N 3/101 (2013.01); F01N 11/002 (2013.01); F01N 2430/08 (2013.01); F01N 2900/1602 (2013.01); F02D 2041/0015 (2013.01); F02D 2041/389 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A startup control method for an internal combustion engine, wherein the internal combustion engine is an in-cylinder direct injection spark ignition internal combustion engine including an intake port provided with a tumble control valve, the startup control method comprising:
implementing a startup of the internal combustion engine by:
determining whether or not the startup of the internal combustion engine satisfies a predetermined cold start condition requiring a retard operation of the internal combustion engine for catalyst warmup; and
when determining that the startup of the internal combustion engine satisfies the predetermined cold start condition, performing a startup process;
wherein the startup process includes:
closing the tumble control valve;
after the closing of the tumble control valve, starting to crank the internal combustion engine;
implementing fuel injection of the internal combustion engine by a single-injection operation during a time period from an initial cycle of combustion of the internal combustion engine to an event that the internal combustion engine rises and reaches a predetermined rotation speed;
after the event, shifting from the single-injection operation to a multiple-injection operation; and
substantially simultaneously with the shifting to the multiple-injection operation, starting an ignition timing retard.