Title:
INTERNAL COMBUSTION ENGINE CONTROL METHOD
Document Type and Number:
Japanese Patent JP2022069726
Kind Code:
A
Abstract:
To prevent dropping of a temperature of catalyst in lean combustion with a premise of a supercharging.SOLUTION: A control method includes: changing an operating point of an internal combustion engine from a present operating point to a high-speed-and-low-load side, while actually maintaining axial output at constant through shifting a transmission (S3), when a catalyst temperature T_cat becomes lower than a criteria #1 (S2), during supercharging with a supercharging pressure Pb being higher than a criteria #2 (S1); and repeating the changing of the operating point to the high-speed-and-high-load side in a case where the supercharging pressure Pb is higher than the criteria #2 (S5) after waiting for a certain cycle until reflecting to the catalyst temperature T_cat to elapse (S4), with the catalyst temperature T_cat being lower than a criteria #1' (S6). Lowering target torque Te increases a degree of opening of a waste gate valve, thus the catalyst temperature T_cat to increase.SELECTED DRAWING: Figure 2
Inventors:
ECHIGO AKIRA
Application Number:
JP2020178530A
Publication Date:
May 12, 2022
Filing Date:
October 26, 2020
Export Citation:
Assignee:
NISSAN MOTOR
RENAULT SAS
RENAULT SAS
International Classes:
F02D43/00; F02D13/02; F02D23/00; F02D41/04
Attorney, Agent or Firm:
Hiromichi Kobayashi
Kiyoshi Tomioka
Kiyoshi Tomioka
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