New rules on emissions will govern new engines
January 28, 2013 in Technical
Saab’s previous engines the 1,8t and 2,0t used in the 9-3 until 2010 were certified according to Euro 4 and Euro 5 requirements.
The different regulatory bodies in the world are today working on a harmonization system in which more or less the same regulations would be used all over the world, making development of engines much easier and to say the least, cheaper for auto-manufacturers.
About two weeks ago I contacted two sources to find out more about what requirements were in place right now and what a gasoline or diesel engine would have to achieve in terms of emissions compared to what they did before.
What I found out was very interesting. The current legislation currently in force since mid summer 2012 is the Euro 5B+ and in terms of pure emissions there isn’t really any significant difference is values compared to when the above mentioned engines were in use with Saab Automobile AB.
The big difference now is the measuring of certain peak values and that the car should achieve similar values in everyday use as it did during testing. These values should also be available through ODB-readout during maintenance or check-ups. Thus identifying any malfunctions in the catalytic system or engine. Certain peak values are programmed to be observed and reported.
This is however only the first step. As a continuation of decreasing emissions from gasoline cars, a similar particle filter to that fitted on diesel cars a few years ago will become reality on cars with a spark-ignition system (gasoline driven cars). Legislation usually refers to either spark or compression ignition (SI or CI). Compression ignition being diesel cars of sometimes a form of LPG driven cars.
These particle filters will most likely find themselves into cars within a year or two and will of course increase the cost of the car, but only slightly. The aim of the regulations issued by Canada, United States (including California) and the European Union is that these filters only be a temporary solution as development of SI engines with direct injection fuel-systems will advance enough, rendering these filters un-neccessary in 5-8 years.
We have heard from different sources that Saab is currently working on a gasoline or diesel engine for the re-launch of the 9-3. We have also heard that the engines should be ones that have been used before by Saab Automobile AB. The latest information we’ve received that it is in fact a previously used engine with a Bosch Engine Management System and since the new engines used in the new 9-5 and 9-3 Griffin were the first Saabs with the new GM ECU we can now be certain that it would not be the new engine developed by GM finding its way back into the new updated version of the 9-3, manufactured by NEVS.
What Saab will most likely be forced to do however is to re-certify the engine since according to the Swedish Transport Agency, the old engine certificate was only applicable to the bankrupt Saab Automobile AB. The transportation agency official also confirmed that the requirements which that engine needs to pass is Euro 5B+ which in reality shouldn’t be a problem considering that it had already passed Euro 5. What is missing though is the monitoring system which need to be developed and implemented into the engines.