公开(公告)号：US12129805B2

公开(公告)日：2024-10-29

申请号：US18324213

申请日：2023-05-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Masato Nakano ,  Yoshito Sekiguchi ,  Nobuhiko Satake

IPC: F02D19/02

CPC classification number: F02D19/029 ,  F02D2200/0406

Abstract: A hydrogen concentration calculating process calculates a hydrogen concentration in a specific portion of a target region based on an operating state of an internal combustion engine. The internal combustion engine uses hydrogen as fuel. A downstream passage is a portion of an intake passage of the internal combustion engine that is downstream of a throttle valve. A connecting passage connects a crank chamber of the internal combustion engine to the downstream passage. The target region is a region including the crank chamber and the connecting passage. When a condition is met, in which the hydrogen concentration is greater than or equal to a predetermined determination value, a pressure reduction process causes a pressure in the downstream passage to be lower than that at a point in time when the condition is met.

公开(公告)号：US12000350B1

公开(公告)日：2024-06-04

申请号：US18492764

申请日：2023-10-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Nobuhiko Satake ,  Daiki Sato

IPC: F02D41/04 ,  F02D19/02 ,  F02D41/14

CPC classification number: F02D41/042 ,  F02D19/021 ,  F02D2041/1472

Abstract: A controller for a hydrogen engine is provided. Control circuitry performs, after a stop request for the hydrogen engine, a water reduction process that reduces a proportion of water vapor in exhaust gas. The control circuitry stops the hydrogen engine after operating the hydrogen engine with the water reduction process executed.

公开(公告)号：US12085032B2

公开(公告)日：2024-09-10

申请号：US18434226

申请日：2024-02-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Nobuhiko Satake ,  Daiki Sato

IPC: F02D41/02

CPC classification number: F02D41/0235 ,  F02D2200/0802

Abstract: A controller for an engine includes processing circuitry. The processing circuitry executes an obtaining process that obtains a catalyst temperature, which is a temperature of a catalyst. The processing circuitry executes a setting process that sets a target air-fuel ratio that is a target value of an air-fuel ratio in the cylinder. The temperature of the catalyst at which an efficiency of nitrogen oxide reduction by the catalyst is the highest is referred to as a prescribed temperature. In the setting process, the processing circuitry sets the target air-fuel ratio to be higher when the catalyst temperature is a first value that is lower than the prescribed temperature, than when the catalyst temperature is a second value that is lower than or equal to the prescribed temperature and higher than the first value.