Some information to assist in the debate:
It appears that some people are using 20 year old data a a basis for
comparison. PSA is way ahead of the pack in terms of diesel emissions.
>From the following:
http://www.developpement-durable.psa.fr/en/realisation.php?niv1=4&niv2=42&niv3=2&id=1925
In a long-term study conducted by Germany's environmental office in
cooperation with the Automobile Club, a Peugeot 607 equipped with a
particulate filter emitted just 0.001g of soot particles per km over a
distance of more than 80,000 km. This concentration is 25 times lower than
the level set by the Euro 4 standard, which comes into application in 2006.
Also:
http://www.developpement-durable.psa.fr/en/index_actualite.php?niv1=0&niv2=02&id=2539
The one-millionth car equipped with the diesel particulate filter (DPF)
rolled off the PSA Peugeot Citroën assembly line at the end of January.
Introduced as a world first in May 2000 on the Peugeot 607, PSA Peugeot
Citroën’s patented DPF has been gradually deployed on Peugeot and Citroën
models in all segments. Today, it is available on nine model families: the
Peugeot 206, 307, 407, 607 and 807, and the Citroën C4, C5, C8 and Xsara
Picasso.
Today, PSA Peugeot Citroën is the only carmaker in the world to mass-market
this technology. By sharply curbing pollutant emissions, DPF-equipped HDi
diesels are the world’s cleanest internal combustion engines. At the same
time, their common-rail direct injection technology delivers exceptional
performance in reducing CO2 emissions, thereby helping to abate the
greenhouse effect.
PSA is not the only manufacturer using this technology:
http://www.dieselnet.com/news/0308daimler.html
Mercedes-Benz announced it will introduce diesel particulate filters (DPF)
on a number of diesel car models starting this October. The filters will
initially be available for the C-Class and E-Class models with the most
popular 4 cylinder CDI engines (to date, 85% of C-Class and about 50% of
E-Class diesel customers have opted for the 200 and 220 CDI engines). At the
beginning of 2004, the 6 cylinder CDI engines in the E-Class and S-Class
will be also equipped with DPFs. All DPF-equipped car models will also meet
the Euro 4 (2005) emission standards.
The combination of EU 4 + DPF will be made available to customers at an
additional price, which in the German market will be €580 (incl. VAT). In
countries which provide tax benefits for EU 4 vehicles—currently Germany,
the United Kingdom, Belgium, Sweden and the Netherlands—the additional cost
would be reduced or cancelled when customers register such a vehicle for the
first time.
Very limited technical information has been released on the DPF system. In
contrast to the Peugeot filter, the Mercedes filer system does not utilize
fuel additives for regeneration. The filter is regenerated by adjusting, in
accordance with requirements, various engine control functions, such as fuel
injection, intake-air throttle, exhaust gas recirculation and boost-pressure
control. In this way, it is possible to increase the temperature of the
exhaust gas to the point when the particulates accumulated in the filter are
burned off. It is not yet clear if the DPF system utilizes a catalyst—either
in the form of a catalyst coating or else as an NO2-forming precatalyst—to
decrease the regeneration temperature requirement.
Mercedes also said that sulfur-free fuels and specially developed engine
oils can extend the service life of the filter. However, fuel sulfur content
requirements, if any, for using the filter were not specified.
In 1985, Mercedes was the first car manufacturer in the world to introduce
particulate filter systems, which were fitted on its model 300D sold in the
California market. After a brief period, the use of DPF technology was
abandoned, mainly due to difficulties with controlling the filter
regeneration. Modern diesel filter systems were made possible by advanced,
active regeneration strategies which are integrated with electronically
controlled engines and injection systems, such as the common-rail. First
such advanced filter system, utilizing cerium-based fuel additive for
regeneration, was introduced in May 2000 by the PSA Group on its Peugeot 607
2.2 HDi. Following the PSA Group, filters (with different regeneration
principles) have been announced by an increasing number of manufacturers,
including Renault, Toyota, and Mazda.
The Peugeot DPF system, which is offered as a standard equipment on a
growing number of Peugeot, Citroen, and certain other car models with
Peugeot diesel engines, remains the most widespread diesel particulate
filter with over 500,000 units sold to date. Peugeot introduced the filter
voluntarily and without receiving any tax benefit, as the fist generation of
DPF-equipped Peugeot cars was not fully EU 4 compliant due to NOx emissions
and DPF service interval requirements. The voluntary introduction of
DPF-equipped, ultra-low PM emission cars was praised, among others, by
German clean air authorities and environmental organizations, who often
played it against German car makers who were reluctant to voluntarily
introduce DPF technology. Widespread use of particulate filters in the
coming years would indeed require voluntary action by the car makers, as the
EU 4 limits can be met—at least in small and medium-sized cars—without the
use of filters.
In its announcement, Mercedes-Benz emphasized the additive-free operation as
the main advantage of its filter system. The use of additive results in
gradual build-up of ash in the filter, which in turn can cause increased
pressure drop, fuel economy loss, and requires added maintenance, says
Mercedes. The Mercedes filter, in contrast, operates without additives and
thus with no fixed change interval, remaining efficient over a “very high”
(but unspecified) mileage.
- Original Message -----
From: "Eduardo Kaftanski" <e@nn.cl>
To: "Mauricio Herrera" <peugeot@racsa.co.cr>
Cc: <peugeot-L@yahoogroups.com>
Sent: Saturday, April 23, 2005 6:49 PM
Subject: Re: [Peugeot-L] 707 and C7
>
> On Thu, Apr 21, 2005 at 11:17:45PM -0600, Mauricio Herrera wrote:
>>
>> Dear Friends:
>>
>> We have a debate about diesel vrs gasoline about contamination (
>> including
>> new engines and models like 307 HDi and Audi A3 TDi)
>>
>>
>> What is you point of view?
>>
>> Is diesel a terrible contaminant?
>>
>
> If you ask me, I like Diesel engines because they burn less fuel
> and emit less CO2. But Diesels do give out more particulate
> emissions than gas engines, and that is the problem usually in
> contaminated cities, particulates...
>
> So, its a two sided question: Diesels are better globaly, but worse
> locally...
>
>
> --
> Eduardo Kaftanski
> eduardo@linuxcenterla.com
> Red Hat Certified Engineer/Instructor/Examiner
> Gerente Ingenieria LinuxCenter S.A.
> Mariano Sanchez Fontecilla 310, 2do piso, Edificio Birmann24, Las Condes,
> Chile
> http://www.linuxcenterla.com +56-2-4834000
>
>
>
> Recommended format for your email subject lines:
> Model # [Model Letters] Year Subject
>
> Examples:
> 505 88 V6 Mileage
> 405 Mi16 89 Ignition Coil source?
> ************************************************
> To unsubscribe from this list send a blank email message to
> PEUGEOT-L-UNSUBSCRIBE@EGROUPS.COM
> ************************************************
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
- Yahoo! Groups Sponsor --------------------~-->
Give the gift of life to a sick child.
Support St. Jude Children's Research Hospital's 'Thanks & Giving.'
http://us.click.yahoo.com/5iY7fA/6WnJAA/Y3ZIAA/4jLplB/TM
--------------------------------------------------------------------~->
Recommended format for your email subject lines:
Model # [Model Letters] Year Subject
Examples:
505 88 V6 Mileage
405 Mi16 89 Ignition Coil source?
To unsubscribe from this list send a blank email message to PEUGEOT-L-UNSUBSCRIBE@EGROUPS.COM
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/peugeot-L/
<*> To unsubscribe from this group, send an email to:
peugeot-L-unsubscribe@yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
Received on Sun Apr 24 07:30:06 2005
