US 12,123,368 B2
Controller and control method for internal combustion engine
Yuto Ikeda, Okazaki (JP); Koji Umezawa, Susono (JP); and Makoto Yamazaki, Gotenba (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Dec. 15, 2023, as Appl. No. 18/542,049.
Claims priority of application No. 2022-203312 (JP), filed on Dec. 20, 2022.
Prior Publication US 2024/0200501 A1, Jun. 20, 2024
Int. Cl. F02D 41/00 (2006.01); F02D 19/02 (2006.01); F02D 41/30 (2006.01); F02D 43/04 (2006.01)
CPC F02D 41/0027 (2013.01) [F02D 19/021 (2013.01); F02D 41/0002 (2013.01); F02D 41/30 (2013.01); F02D 43/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An internal combustion engine includes comprising:
a cylinder;
a fuel injection valve that supplies hydrogen gas into the cylinder, and;
a throttle valve that adjusts an intake air amount,; and
a controller, wherein the controller is configured to:
calculate a first operating condition in which a fuel injection amount of the fuel injection valve and an opening degree of the throttle valve result in an air excess ratio in the cylinder being greater than 1.2 while satisfying a target output of the internal combustion engine;
calculate a second operating condition in which the fuel injection amount of the fuel injection valve and the opening degree of the throttle valve result in the air excess ratio in the cylinder being 1 or less while satisfying the target output of the internal combustion engine;
calculate a third operating condition in which the fuel injection amount of the fuel injection valve and the opening degree of the throttle valve result in the air excess ratio in the cylinder falling within a range that is greater than 1 and less than or equal to 1.2, and an amount of NOx production is increased relative to an amount of NOx produced during the first and second operating conditions; and
select one of the first operating condition and the second operating condition according to an operating situation of the internal combustion engine, wherein the selection of one of the first operating condition and the second operating condition is given preference relative to a selection of the third operating condition.