US 11,988,176 B2
Engine control device
Masahiro Itani, Osaka (JP); Hideo Shiomi, Osaka (JP); and Keiji Kunisawa, Osaka (JP)
Assigned to Yanmar Power Technology Co., Ltd., Osaka (JP)
Appl. No. 17/598,352
Filed by Yanmar Power Technology Co., Ltd., Osaka (JP)
PCT Filed Feb. 10, 2020, PCT No. PCT/JP2020/005131
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/195248, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-064340 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0163001 A1, May 26, 2022
Int. Cl. F02M 26/49 (2016.01); F02D 41/00 (2006.01); F02D 41/22 (2006.01); F02M 26/05 (2016.01)
CPC F02M 26/05 (2016.02) [F02D 41/0065 (2013.01); F02M 26/49 (2016.02); F02D 2041/227 (2013.01); F02D 2250/26 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An engine control device that controls an engine including an EGR device that recirculates a portion of exhaust gas as EGR gas to an intake side, the engine control device comprising:
an abnormality determining unit that determines whether an abnormality has occurred in the EGR device;
a restricted operation unit that, if the abnormality determining unit determines that an abnormality has occurred in the EGR device, performs a restricted operation in which some functions of the engine are restricted including restricting an engine output; and
a restriction released operation unit that, when a release operation of the restricted operation is performed, switches from the restricted operation to the restriction released operation in which a restriction on some of the functions of the engine is released and performs the restriction released operation.