US 12,442,335 B2
Engine control device
Hiroaki Kosaka, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Nov. 13, 2024, as Appl. No. 18/945,553.
Claims priority of application No. 2024-015627 (JP), filed on Feb. 5, 2024.
Prior Publication US 2025/0250944 A1, Aug. 7, 2025
Int. Cl. F02D 13/02 (2006.01); F01L 1/344 (2006.01)
CPC F02D 13/0261 (2013.01) [F02D 13/0219 (2013.01); F01L 1/3442 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An engine control device for an engine that uses hydrogen as a fuel, the engine control device comprising:
a processing circuit configured to:
acquire an engine speed;
acquire a current amount of air flowing into a plurality of cylinders of the engine;
acquire a maximum amount of the air based on a steady operation of the engine at the acquired engine speed with a fully opened throttle valve;
acquire an engine load factor which corresponds to a ratio of the current amount of air to the maximum amount of air;
determine the engine is operating in a high-load/high-rotation range when (i) the acquired engine speed is greater than or equal to a first threshold value, and (ii) the engine load factor is greater than or equal to a second threshold value that is mapped to the acquired engine speed; and
control a valve timing of at least one valve of an intake valve and an exhaust valve so as to increase a valve overlap amount to a predetermined maximum value when the engine is determined to be operating in the high-load/high-rotation range.