Air/fuel mixture control in an internal combustion engine

Air/fuel ratio control system for internal combustion engines, h

Air/fuel ratio validation for lean burn

Air/fuel ratio validation for lean burn

Ammonia injection in NOx control

Ammonia/fuel ratio control system for reducing nitrogen oxide em

Apparatus and method for controlling noxious components in autom

Apparatus and method for controlling the air-fuel ratio of an in

Apparatus and method for detecting abnormalities in a secondary

Apparatus and method for detecting deterioration of NO.sub.x cat

Apparatus and method for diagnosis of catalyst performance

Apparatus and method for diagnosis of catalyst performance

Apparatus and method for diagnosis of catalyst performance

Apparatus and method for emissions containment and reduction

Apparatus and method for estimating the temperature of an automo

Apparatus and method for force feeding air to a carburetor used

Apparatus and method for internal combustion engine control

Apparatus and method for internal-combustion engine control

Apparatus and method for purifying exhaust gas in an internal co

Apparatus and method for reducing harmful products of combustion