Durability required in the engine compartment

MANN + HUMMEL supplies tailor-made charge air duct

Charge air duct withstands high temperatures and extreme pressures

Renault

The Dacia Duster and Renault Clio will in future drive with a particularly low-emission diesel engine. MANN+HUMMEL will supply the customized charge air duct which has to be especially robust.

Europe is upgrading its diesel fleet with efficient, low-emission engines. It is especially for this reason that the cooperation of Renault and Nissan has developed a new 1.5 liter diesel engine. This engine meets the high requirements of the Euro 6d TEMP standard and in future will also ensure low-emission mobility in the Dacia Duster and Renault Clio models.

The special feature of the new engine series is that it uses an indirect intercooler which uses water to cool the charge air. In contrast to direct intercoolers it is located in the engine compartment and not at the front end which enables finely-tuned thermal management to help reduce the exhaust emissions. This sophisticated solution demands a lot from the fitted components. It means that the charge air duct has to be able to withstand an over-pressure of up to 2.4 bar at a maximum temperature of 230 degrees Celsius.

Plastics expertise

As a long-term system partner MANN+HUMMEL developed the right part for this application. Temperature-resistant polyamide PA66.6 GF35 is used for the injection-molded plastic components. The material mix of polyamide 6, polyamide 66 and 35 percent glass fibers is able to withstand high temperatures and extreme pressures. The same is true for the temperature-resistant, multi-layer elastomer hoses with fabric reinforcement. A special broadband silencer reduces the undesired, high-frequency noise of the turbocharger. The developers came up with a particularly compact design for use in the engine compartment. The components can be easily and safely connected to the turbocharger using a quick connector coupling from MANN+HUMMEL.

Close to the customer

The development and design of the new component was undertaken by the experts in the competence center for charge air ducts in Laval, France. MANN+HUMMEL produces the charge air duct there and also at Zaragoza in Spain. The development partnership is already progressing with the start of a new series product together with Renault expected for the middle of 2018.