Continental's 48v motor assist and electric catalyst package. Golf GTD test car.

Discussion in 'Volkswagen Chat' started by Toyotec, Feb 16, 2018.

  1. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    Afternoon Club GTI gearheads.


    Well how about an educational Friday?


    More than two years ago the Volkswagen group found itself in a crisis. It was in September 2015. I remember posting about US/EU emissions and pollution control in this thread back then >>here<<
    We would have all heard about their 'dieselgate' emission scandal over in the US market that began with the EA189 series engine as tested in LEV 2 and Tier 2 territories.
    These products were found to be fitted with software that sensed laboratory conditions and altered emissions controls to give better than real life emissions. This is classed as a "defeat device".
    EA288 engines that were EU6 compatible were not affected as far as is known. EU certified tests, based on EU5 limits/cycles, validated on vehicles made with the EA189 engine were not known to fail due to a less stringent 180mg/km NOX limit and gentle NEDC/NEFZ cycle.


    That scandal caused ripples throughout the automotive industry as legislation was tightened in the EU, with the introduction of RDE and WLTC replacing the NEDC in EU6 and other territories with manufactures and governments all beginning to turn to forms of hybridization or even full EV.


    Well Automotive supplier Continental, has a 1000 Euro solution, A super clean diesel as they call it. This package includes an electrically heating catalyst and a 48v electric motor assist that accumulates kinetic energy on braking and deceleration. To heat a catalyst on a diesel engine, fuel and injection phasing and EGR is altered to help with exhaust after treatment and the heat generated can be helpful to NOX conversion when there is a SCR system. The downside to this is increased fuel consumption and some compromise to driveablity. With the Continental system fuel consumption is improved.


    The video below shows a VW Golf GTD fitted with the Continental system and tested with PEMS (Portable Emission Measurement System) equipment on a RDE (Real Drive Emissions) cycle, delivering sub a 60mg/km NOx result on average. (The current EU6 NOx target is 80mg/km for compression ignition vehicles).


    Please take time to watch and understand what is occurring in the video. Diesel calibrators, please note, I am no expert.
    The future of the combustion engine is not over as some might think!


    https://youtu.be/nYBebY5NJeQ

    [video=youtube_share;nYBebY5NJeQ]http://youtu.be/nYBebY5NJeQ[/video]
     
    Last edited: Feb 17, 2018
  2. Desertstorm

    Desertstorm Paid Member Paid Member

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    Very interesting,thanks for posting that. Unfortunately it takes over an hours driving to get down to 60mg and after 2 hours driving the average is still 40 based on a limit of 80.
    If you use the car in built up city traffic the NOX levels although lower than a normal diesel will still be a lot higher than a petrol car.
    Plus Euro 7 looks like they are really going to tighten up on Particulate emissions.
    http://www.transportengineer.org.uk/article-images/116005/Next_generation_engines.pdf
    If so this will make design of soot treatment systems a lot more difficult for a diesel. Unfortunately I think the damage is done. Diesels are being blamed for all the pollution in city centres, Have a look around the middle of London in the rush hour, all the big fancy cars and 4x4's with big engines. They have stop /start systems but nobody uses them as you have to be quick off the mark to jump into that gap, you can't wait for the engine to start.
    Unfortunately I think petrol hybrids are where we will end up. Small capacity turbocharged engines with a hybrid battery system to provide assistance and run the vechicle around town in stop start traffic.
     
  3. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    The RDE test looks at the emissions for a cold/urban phase stipulated by speed thresholds and a total phase. You have to pass this both the cold+urban and the total to the EU6 std.
    Remarkably the system or package tested in the GTD, have little impact on FE and drive feel, as the engine does not have to be put into an inefficient mode to put heat into the cat.
    Partics have limits of quantity and size for both Diesels and DI Petrols. Engine calibration and DPFs take care of that currently.

    EU7 is 2 years away for phase in. I am sure the manufacturers are preparing for the new wave of rules.
     

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