US 12,116,960 B2
Internal combustion engine and method for controlling internal combustion engine
Takashi Ijuin, Kariya (JP); and Shoji Yajima, Kariya (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Appl. No. 18/287,403
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
PCT Filed Feb. 8, 2022, PCT No. PCT/JP2022/004832
§ 371(c)(1), (2) Date Oct. 18, 2023,
PCT Pub. No. WO2022/224545, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 2021-073133 (JP), filed on Apr. 23, 2021.
Prior Publication US 2024/0209816 A1, Jun. 27, 2024
Int. Cl. F02M 26/00 (2016.01); F02M 26/24 (2016.01); F02M 26/50 (2016.01)
CPC F02M 26/24 (2016.02) [F02M 26/50 (2016.02)] 8 Claims
OG exemplary drawing
 
1. An internal combustion engine including an exhaust gas recirculation device that refluxes EGR gas, which is a part of exhaust, to an intake passage, the internal combustion engine comprising:
an EGR cooler that is provided in an EGR passage through which the EGR gas flows and that cools the EGR gas;
a switching unit that switches a direction in which the EGR gas flows between a first mode in which the EGR gas flows through the EGR cooler in a predetermined direction and a second mode in which the EGR gas flows through the EGR cooler in a direction opposite to the predetermined direction; and
a control device,
wherein the control device includes at least one of a deposit control unit and a condensed water control unit,
the deposit control unit includes
a deposit amount calculation unit that calculates an accumulation amount of deposit accumulated in the EGR cooler by using, as parameters, an amount of fuel injection and a rotation speed of the internal combustion engine, and
a first switching command unit that provides a command to perform switching between the first mode and the second mode when the accumulation amount of deposit exceeds a first threshold value,
the condensed water control unit includes
a condensed water amount calculation unit that calculates a retention amount of condensed water retained in the EGR cooler by using, as parameters, the amount of fuel injection and the rotation speed, and
a second switching command unit that provides a command to perform switching between the first mode and the second mode when the retention amount of condensed water exceeds a second threshold value, and
the deposit is generated by at least soot contained in the EGR gas and the condensed water being joined to each other.