Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Idle speed control system

Idle speed control system

US Patent 5228421 · Granted Jul 20, 1993

Estimated economic value: $20,215,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method and system for diagnosing a secondary air supply for an internal combusti2003
Engine catalyst monitor2003
System and method for monitoring a conditioning catalyst2003
NOx sensor monitoring2002
Engine control system with exhaust gas recirculation and method for determining 2000
Engine control system for an engine coupled to a fuel vapor recovery1998
Engine control system for a lean burn engine having fuel vapor recovery1998
Engine control system for a lean burn engine having fuel vapor recovery1998
Method and system for monitoring fuel delivery of an engine1998
Air/fuel control system with catalytic converter monitoring for a variable displ1997
Method for maintaining clean spark plugs in a variable displacement engine1997
Exhaust system with bypass catalytic converter and diagnostics1996