Thermal management: Lower fuel consumption, reduced CO2 emissions

MANN+HUMMEL at the IAA Commercial Vehicles 2014

CO2 footprint and improved fuel economy – vehicle manufacturers are continuing to drive forward optimisation of commercial vehicle engines. MANN+HUMMEL meets the demands of its customers for low fuel consumption through intelligent concepts for thermal management. The solutions from the system supplier permit savings of 3 to 5 percent.

Oil module with oil centrifuge

Ludwigsburg/Hanover, 23 September 2014 - Every penny counts in the transport industry. An important factor in the operation of a truck is its fuel consumption. Every percentage point saved by a haulier has a direct impact on his profitability. Thermal management helps to reduce fuel consumption by lowering the internal friction losses in the engine.

The engine oil provides resistance against every engine movement due to its viscosity. This viscosity is perceptibly reduced if the average oil temperature today of around 90 degrees Celsius is increased to between 100 and 105 degrees. The engine then runs more smoothly as a result, leading to fuel savings of 3 to 5 percent. This also has advantages for cold starting: the engine reaches its operating temperature more quickly in the consumption-intensive starting phase – and thus saves fuel here as well.

The systems and valves for thermal management developed by MANN+HUMMEL maintain the oil temperature in the defined range by means of an intelligent switching strategy. This switching strategy makes it possible to reduce the CO2 emissions of commercial vehicles by 2 to 3 grams per kilometre. The thermal management technology from MANN+HUMMEL therefore helps to achieve compliance with the statutory emission limits according to the EURO VI regulations.

MANN+HUMMEL uses thermostat-controlled switching valves with a very precise switching point in its oil modules for oil circuit control. This is due to the fact that the distance from the engine oil failure limit at an oil temperature of 105 degrees Celsius is much smaller than at 90 degrees. The wax expansion elements used maintain the defined switching temperature range very precisely and ensure that the radiator is activated immediately when a corresponding temperature is reached. The valves are also characterised by a large lift. This permits large flow cross-sections, which are required to ensure a low pressure loss.

The two-stage thermostat developed by MANN+HUMMEL features an extended functional scope and consists of two series-connected wax actuators. One actuator initiates heating of the oil at low temperatures, while the other prevents the critical temperature from being exceeded when the oil is hot. All systems have a safety function that guarantees reliable engine operation even in the event of a fault. MANN+HUMMEL provides an insight into how the future of thermal management may look with an electronically-controlled and even more precise active switching valve, which is currently used in one passenger car application.

The expertise of MANN+HUMMEL can be found above all in optimum matching of these systems for a specific engine application. Above and beyond the design of high-quality valves, the core competencies of the system supplier include combining individual components into reliable and economical overall systems that meet the highest requirements: systems that filter, perform thermal management and function perfectly for over 1.5 million kilometres.

At the IAA Commercial Vehicles, the operating principle of thermal management will be clearly demonstrated at the MANN+HUMMEL stand. Visitors will be able to see an enlarged thermostat valve, in which the switching movements and oil flows are clearly visible, as well as an oil module in which a thermostat valve is integrated.


Press images:           Oil module with oil centrifuge

Images can be reprinted free of charge for editorial purposes.

Press contact:          Miriam Teige
                                     Tel.:   +49 (0) 7141 98-2583
                                     E-mail: miriam.teige@mann-hummel.com

The MANN+HUMMEL Group is a leading global expert for filtration solutions and development partner and original equipment supplier to the international automotive and mechanical engineering industries. Employing 15,231 people at around 60 locations worldwide, the company achieved turnover of about 2.68 billion euros in 2013. The group’s product portfolio includes air filter systems, intake manifold systems, liquid filter systems, cabin filters and plastic sound components (known as 'symposers'), as well as filter elements for vehicle servicing and repair. For general engineering, process engineering and industrial manufacturing sectors the company’s product range includes industrial filters, a series of products to reduce carbon emission levels in diesel engines, membrane filters for water filtration and filter systems.