Scania transmission components are developed as part of Scania’s integrated powertrain with a perfectly matched specification for each individual demand. The gearboxes are designed to suit the high-torque Scania engine range. The multitude of drive axle and bogie options provide optimum strength without inducing a weight penalty. Integrated powertrains are offered to customers on a modular basis in which nearly any gearbox can be combined with nearly any engine.
The traditional approach to the design of gearbox and powertrain components involves creating an initial design based on one-dimension powertrain models and engineering calculations and then building and testing a prototype. With this approach, undesirable properties are identified during physical testing at a late stage in the design process when changes are expensive. Another concern was that the cost involved in building and testing different gearbox-engine combinations can be very high, especially if prototypes have to be rebuilt and retested because the design did not match what was intended the first time.
Scania has addressed this challenge by making extensive use of MSC Software’s Adams multibody simulation (MBS) 3D powertrain models that accurately predict transmission dynamic behavior. Scania powertrains are now developed in a virtual environment in which a large number – often thousands – of design alternatives are simulated and evaluated as software prototypes. Simulation predicts the performance of design alternatives prior to committing to the time and cost involved in building and testing physical prototypes.
Simulation enables Scania engineers to quickly evaluate functional virtual prototypes of power transmission assemblies and components. Working in the MSC Software Adams simulation environment, Scania engineers can exercise powertrain designs under a wide range of conditions using the same tests they normally perform in a test lab but in a fraction of the time. Modifications are validated in the virtual world, which saves a significant amount of time and money in the design process. In some cases engineers have solved quality issues 30 percent to 40 percent faster when running simulation and measurements in parallel due to better understanding of the product.