Method to reduce diesel engine exhaust emissions
Methods for reducing harmful emissions from a diesel engine
Misfire detecting system in double air-fuel ratio sensor system
Modulating air/fuel ratio
Muffler apparatus with filter trap and method of use
Muffler assembly with balanced chamber and method
Multi-cylinder air-compressing injection-type internal-combustio
Multi-cylinder internal combustion engine and method of operatio
Multi-stage honeycomb heater
Multicylinder internal combustion engine, especially for automob
Multiple spark ignition internal combustion engine with exhaust
Need-based method of heating a catalyst in the exhaust system of
Nitrogen oxide removal using diesel fuel and a catalyst
Nitrogen spark denoxer
No exhaust emission control method and arrangement
NO.sub.x reduction method
NOx absorber diagnostics and automotive exhaust control...
NOx adsorber system regeneration fuel control
Nox reduction system utilizing pulsed hydrocarbon injection
Nox trap efficiency