US 12,305,603 B2
Fuel property determination device and vehicle
Shinichiro Kaneko, Fujisawa (JP); Misao Tanaka, Yokohama (JP); Koji Goto, Fujisawa (JP); Buso Takigawa, Kanagawa (JP); and Ryota Adachi, Kanagawa (JP)
Assigned to Isuzu Motors Limited, Yokohama (JP); and Nikki Co., Ltd., Kanagawa (JP)
Appl. No. 18/701,654
Filed by Isuzu Motors Limited, Yokohama (JP); and Nikki Co., Ltd., Kanagawa (JP)
PCT Filed Oct. 18, 2022, PCT No. PCT/JP2022/038757
§ 371(c)(1), (2) Date Apr. 16, 2024,
PCT Pub. No. WO2023/068267, PCT Pub. Date Apr. 27, 2023.
Claims priority of application No. 2021-170415 (JP), filed on Oct. 18, 2021.
Prior Publication US 2024/0410329 A1, Dec. 12, 2024
Int. Cl. F02P 5/15 (2006.01); F02D 19/02 (2006.01); F02D 41/00 (2006.01); F02D 41/04 (2006.01); F02D 41/06 (2006.01); F02D 41/22 (2006.01); F02M 21/02 (2006.01); G01N 33/28 (2006.01)
CPC F02P 5/1502 (2013.01) [F02D 19/02 (2013.01); F02D 41/0025 (2013.01); F02D 41/0027 (2013.01); F02D 41/042 (2013.01); F02D 41/062 (2013.01); F02D 41/22 (2013.01); F02M 21/02 (2013.01); G01N 33/2835 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A fuel property determination apparatus that determines a component of liquefied natural gas stored in a tank as a fuel for an engine, the fuel property determination apparatus comprising a processor configured to:
when the engine is being driven, calculate an ignition retard control amount for avoiding knocking in the engine and estimate a first methane number of the liquefied natural gas based on an index value indicating the ignition retard control amount;
when the engine is restarted from a stopped state, estimate a second methane number of the liquefied natural gas based on the first methane number, a remaining amount of the liquefied natural gas when the engine stops, and a stop time of the engine; and
when the first methane number or the second methane number is less than a threshold, notify that a property change has occurred in the liquefied natural gas.