Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Impact of drag reducing agent on diesel car

The main activity of CRF has been focused on the assessment of long-chain polymers effects on engine behaviour in terms of: emissions, deposit on engine components and effect on catalyst converter.

In the project's “Assessment of effect on engine behaviour” -part, the work has been focused on the evaluation of the Drag Reducing Agent (DRA) A, and separately added to the fuel (diesel fuel with 350 p.p.m. of sulphur) of a diesel car (Punto 1.9JTD) covering 15.000 km on the road for each additive.

The CRF activity has been split as follows:
- Test on the road covering 3000 km, using commercial diesel only, in order to set the 1st Zero emissions point. Emissions analysis has been carried out applying the standards procedures NEDC2000, in order to fulfil the actual European Emissions standards EURO3. (please refer to 6th Month AESOP and CRF technical reports)

- Test on the road covering 15000km using commercial diesel with 100 mg/kg of DRA B (polyalfaolefine dissolved in light hydrocarbon).The emissions have been analysed every 5000km. (please refer to 6th Month AESOP and CRF technical reports)

- Chemical and physical characterisation of used lube oil. Dismantling and inspection of the car engine components: intake valve deposits, diesel filter, injectors. Morphological and chemical characterisation of the exhaust of catalytic converter. (please refer to 18th Month AESOP and CRF technical reports)

- Test on the road covering 3000 km, using commercial diesel only, in order to set the 2nd Zero emissions point. (please refer to 24th Month AESOP and CRF technical reports)

- Test on the road covering 15000km using commercial diesel with 100 mg/kg of DRA A (polyamide dissolved in water solution).The emissions have been analysed every 5000km. (please refer to 30th Month AESOP and CRF technical reports)

- Chemical and physical characterisation of used lube oil. Dismantling and inspection of the car engine components: intake valve deposits, diesel filter, injectors. Morphological and chemical characterisation of the exhaust of catalytic converter. (please refer to 30th Month AESOP and CRF technical reports)

The final outcome of the project can contribute to a carefully selection of the typology of additives to be used as drag reducers, in order to obtain an important energy saving in European oil pipelines networks.

In fact, although the total kilometres covered using each additive are not enough to be compared with a realistic lifetime of a car, in relation to the experimental protocol applied, some general comments can be drawn:
- The emissions measured while using the DRA B are comparable with the EURO3 standards.

- Concerning the DRA A, it is necessary a further evaluation through an extra test program to confirm or not the result.
In both of additives, no significant influence has been detected in the tendency of the fuel to leave deposit on engine parts and components.

Reported by

Centro Ricerche FIAT
Strada Torino, 50
10043 ORBASSANO
Italy
See on map