Ludwigsburg/Frankfurt, September 12, 2017 – a more constant and effective intercooling and a resulting reduction of CO2 emissions of up to 3% are the advantages of indirect intercooling which are convincing more and more vehicle manufacturers. In comparison to direct intercooling, a reduced charge air volume and a quicker build-up of boost pressure improve the engine response. MANN+HUMMEL, the filtration expert from Ludwigsburg, has now raised this technology to a new level. At the 2017 Frankfurt motor show the company will celebrate the world premiere of the first intake manifold with a fully integrated intercooler.
Full integration versus stand-alone concept
The new system exploits all the advantages of indirect charge air cooling and requires a lower number of components in comparison to stand-alone concepts which work with separate components for the intercooler and intake manifold. This reduces the number of interfaces and the handling costs for automobile manufacturers. In addition, a lower pressure drop and the smaller charge air volume serve to improve the engine response.
Full integration versus mounted units
With full integration the cooler is completely enclosed by the intake manifold shells. This gives the whole system a higher stability in comparison to mounted solutions as there is no sealing surface to the outside. The system enables excellent temperature distribution with a maximum temperature difference of two degrees Kelvin over all six cylinders. In this process, the whole system has to withstand high temperature differences between the air inlets and air outlets of up to 90 degrees Kelvin.
The seal consisting of two components between the cooler and intake manifold shells is characterized by good resistance to chemicals and low leakage values. It is made from a plastic frame in the particularly strong polyamide 6 with a 35% glass-fiber component (PA6 GF35) and an elastomer seal in fluorinated rubber which has a good resistance to temperature and media. A positive-locking fit keeps the polyamide and elastomer firmly and securely together.
Absolute charge pressures of up to 2.7 bar place high requirements on components. The large surfaces of the plastic shells are subject to considerable stress. Using modern simulation technology, internal prototype construction and intensive testing, the engineers at MANN+HUMMEL were able to enhance the right design through the use of ribbed plastic shells to ensure the highest stability and at the same time to minimize weight.
Guiding ribs in the assembly ensure an even air inflow to all the cylinders through an optimum air flow. At the same time the component design serves to minimize pressure drop. The use of hot-gas welding enables more narrow welding seams which are also stronger. A positive side effect is the increased cleanness of the component due to the fact that with this process there is no fluff resulting from friction.
MANN+HUMMEL is a leading global expert for filtration solutions. The company group with its headquarters in Ludwigsburg, Germany, develops solutions for motor cars, industrial applications, clean air in interior spaces and the sustainable use of water. In 2016 the group achieved sales of approx. 3.5 billion euros worldwide with more than 20,000 employees at more than 80 locations. The products manufactured by the group include air cleaner systems, intake manifold systems, liquid filter systems, plastic components, filter media, cabin filters, industrial filters and membrane filters.