Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Apparatus for determining deterioration of three-way catalyst of internal combustion engine

Apparatus for determining deterioration of three-way catalyst of internal combustion engine

US Patent 5165230 · Granted Nov 24, 1992

Estimated economic value: $98,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Surface-acoustic-wave device package and method for fabricating the same2001
Apparatus for detecting malfunction in evaporated fuel purge system2001
Apparatus for detecting malfunction in fuel evaporative prurge system1994
Method and apparatus for determining deterioration of three-way catalysts in dou1994
Device for determining misfiring cylinder of multicylinder engine1993
Failure detection device for evaporative fuel purge system1993
Apparatus for detecting malfunction in evaporated fuel purge system1993
Air-fuel ratio control device for an engine1993
Method and apparatus for detecting abnormal state of evaporative emission-contro1993
Apparatus for diagnosing abnormality in fuel injection system and fuel injection1993
Apparatus for detecting malfunction in evaporated fuel purge system1992
Apparatus and method for detecting abnormalities in a secondary air supplier1992