TWCS - What does TWCS stand for? The Free Dictionary
References in periodicals archive
When a vehicle starts from ambient temperature (cold start), the hot exhaust flow of the engine must heat the three-way catalyst (TWC
) converter to an operating temperature over 250[degrees]C to enable effective conversion of engine out emissions [2, 3].
As of this writing, all six provinces in the Bicol region have been placed under TWCS
The predominant emissions control device from gasoline combustion is the three way catalyst (TWC
), which is most effective when the engine is operated at air-fuel ratios ([lambda]) near stoichiometry.
However, recent studies have shown the TWC
activity to contribute to high levels of tailpipe ammonia emissions.