排気浄化触媒温度保温方法および排気浄化触媒保温システム

Title:

排気浄化触媒温度保温方法および排気浄化触媒保温システム

Document Type and Number:

Japanese Patent JP7338524

Kind Code:

B2

Abstract:

To provide an exhaust emission purification catalyst temperature holding method for preventing the deterioration of fuel economy, and suppressed in a rise of a cost, and an exhaust emission purification catalyst temperature holding system.SOLUTION: In an exhaust emission purification catalyst temperature holding system 1, at an operation of an internal combustion engine 2, a first selector valve 8 blocks a bypass exhaust passage 6, and makes an upstream-side exhaust passage 5a of the first selector valve 8 and a downstream-side exhaust passage of the first selector valve 8 communicate with each other, and a second selector valve 9 blocks the bypass exhaust passage 6, and makes an upstream-side exhaust passage of the second selector valve 9 and a downstream-side exhaust passage 5c of the second selector valve 9 communicate with each other. At a stop of the internal combustion engine 2, the first selector valve 8 blocks the upstream-side exhaust passage 5a of the first selector valve 8, and makes the downstream-side exhaust passage of the first selector valve 8 and the bypass exhaust passage 6 communicate with each other, and the second selector valve 9 blocks the downstream-side exhaust passage 5c of the second selector valve 9, makes the upstream-side exhaust passage of the second selector valve 9 and the bypass exhaust passage 6 communicate with each other, and drives a motor generator 4.SELECTED DRAWING: Figure 1

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Inventors:

Noriyuki Shiwaku
Junaki Hiramoto
Masatsugu Takahashi
Yoshiaki Naoi
Keita Mao
Takeshi Chihara

Application Number:

JP2020047086A

Publication Date:

September 05, 2023

Filing Date:

March 18, 2020

Export Citation:

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Assignee:

Nissan Motor Co., Ltd

International Classes:

F01N3/20; F02B37/04; F02B37/12; F02B37/18; F02D9/04

Domestic Patent References:

JP201835756A

Foreign References:

WO2019220789A1

Attorney, Agent or Firm:

Patent Attorney Corporation Ayata Office

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