Purging of an NOx trap

Purification capacity recovery method of exhaust gas...

Purification of exhaust gases

Purifier of diesel particulates in exhaust gas

Pyrogen igniter ramjet ignition system

Pyrotechnically driven nozzle restrictor

Quick-heating catalytic converter

Radio frequency-based particulate loading monitoring system

Ramjet engine equipped with a plurality of carburated air supply

Ramjet with adjustable working duct casings

Rapid catalyst warm-up control device for internal...

Reactor for afterburning of unburned constituents in the exhaust

Recirculatory System

Reducing agent dosing device

Reducing agent dosing device

Reducing agent for emission control system, reducing-agent...

Reducing NO x emissions with a staged catalyst

Reducing NO.sub.x emissions from an engine by selective catalyti

Reducing NO.sub.x emissions from an engine while maximizing fuel

Reducing oxides of nitrogen using hydrogen generated from...