Powertrain & Vehicle - Cooling System Design and OptimizationCustomer RequirementsManufacturers of commercial vehicles and equipments are facing a substantial increase on the heat release into the cooling system. The main sources for this increase are: more stringent emissions, leading to new combustion technologies, increased power of the engines, more hydraulic flow, and air condition.
At the same time the noise levels have to decrease and the fuel economy to be improved. This forces manufacturers to think about new concepts and optimised efficiency of the cooling system.
Modern simulation tools integrated in the design process, are able to reduce losses, improve comfort and at the same time shorten the time to market and save development cost.
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AVL Strengths- Fast and flexible response to clients' project needs
- Wide collective experience from engine and tractor development projects
- Synergies to AVL’s engineering know-how in the area of commercial vehicles and passenger cars
- AVL developed own simulation tools, which are continuously improved by AVL users
- Integration in the customer’s development process
- Close to the customer by Tech-Centers
- AVL data base
Customer BenefitsOptimisation on virtual vehicle replaces prototype work
Engineering loops on hardware are avoided
- development cost reduction
- reduced time to market
Improved design quality on long lead items (i.e. engine hoods, radiators, etc.)
- reduction on tooling cost
- reduction on prototype component cost
- improved cooling performance
Reduced risk during testing period
Improved cooling system performance
- smaller packaging
- improved efficiency
- reduced noise
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AVL ApproachThe overall cooling system specification and optimisation is performed by a total system approach considering the heat input process, the internal and external coolant circuit, the oil circuit, and the external air flow. Depending on the depth of details, advanced CFD simulation techniques are utilised to simulate the under-hood air flow in detail in case no measured data are available. But also measured data can be cosidered by this approach.
The resulting pressure, temperature and mass flow of the air, charge air, coolant, and lubrication oil are optimised by parametric studies in view of size, type and arrangement of the radiator, oil cooler and charge air cooler, and size, speed and type of the fan, for different vehicle operating conditions. |
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