公开(公告)号：US10408104B2

公开(公告)日：2019-09-10

申请号：US15945357

申请日：2018-04-04

Applicant: NGK Spark Plug Co., LTD.

Inventor： Takaya Yoshikawa ,  Takaaki Yamada ,  Yuki Saito

IPC: F01N3/20 ,  F01N3/28 ,  F01N13/00

Abstract: A catalyst apparatus is disposed in an exhaust passage for exhaust gas discharged from an internal combustion engine and includes a catalyst section for purifying the exhaust gas, and a heater section disposed upstream of the catalyst section in the exhaust passage and adapted to heat the exhaust gas. The heater section is configured such that a plurality of metal thin plates and insulators are stacked alternatingly are wound. The heater section contains a pair comprising a positive electrode and a negative electrode for energizing and heating the metal thin plates. The positive and negative electrodes are joined to each of the metal thin plates in such a manner that the positive electrode is located away from the negative electrode in a winding direction of the metal thin plates.

公开(公告)号：US11174808B2

公开(公告)日：2021-11-16

申请号：US17039778

申请日：2020-09-30

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tetsuya Ito ,  Yuki Saito

IPC: F02D41/14 ,  F01N3/10

Abstract: An air-fuel ratio control system (1) including an air-fuel ratio control section (3) for controlling the air-fuel ratio λ of an air-fuel mixture, an exhaust gas purifier (4); an air-fuel ratio sensor (5) whose output changes sharply when λ in the exhaust gas changes between rich and lean sides about a stoichiometric air-fuel ratio; a heater (6); and a temperature control section (7). The air-fuel ratio control section (3) controls λ based on the output of the air-fuel ratio sensor (5) using, as a target air-fuel ratio, a predetermined air-fuel ratio such that 0.980≤λ