US 12,448,932 B2
Engine control device, and vehicle
Koji Goto, Kanagawa (JP); Yoshifumi Nagashima, Kanagawa (JP); and Shunsuke Kuroki, Kanagawa (JP)
Assigned to Isuzu Motors Limited, Yokohama (JP)
Appl. No. 18/710,201
Filed by Isuzu Motors Limited, Yokohama (JP)
PCT Filed Nov. 14, 2022, PCT No. PCT/JP2022/042172
§ 371(c)(1), (2) Date May 15, 2024,
PCT Pub. No. WO2023/090279, PCT Pub. Date May 25, 2023.
Claims priority of application No. 2021-186450 (JP), filed on Nov. 16, 2021.
Prior Publication US 2024/0352903 A1, Oct. 24, 2024
Int. Cl. F02D 41/22 (2006.01); F02D 19/02 (2006.01)
CPC F02D 41/22 (2013.01) [F02D 19/023 (2013.01); F02D 2200/0611 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A control device of an engine including a fuel supply system configured to supply liquefied natural gas as a fuel to the engine, comprising
a memory to store a feedback correction value associated with each of a plurality of blocks sectioned by an engine rotational frequency and an engine load; and
a processor configured to:
calculate a feedback correction value based on a deviation between an actual fuel supplying amount and a target fuel supplying amount, and feedback-control the fuel supply system based on the feedback correction value calculated;
acquire a methane value of the liquefied natural gas;
modify the feedback correction value based on the methane value acquired; and
calculate a difference between a reference value and the feedback correction value modified for each of the plurality of blocks; and determine that there is a defect of the fuel supply system when a number of blocks of which the difference exceeds a threshold value is equal to or greater than a predetermined number;
perform a defect diagnosis of the fuel supply system to determine whether there is a defect of the fuel supply system based on the feedback correction value modified; and
generate a defect notification when it is determined that there is a defect of the fuel supply system.