In vehicle driving cycle simulations, a vehicle speed schedule as a function of time is imposed as input, and transient engine torque (or retarding torque or vehicle braking torque) and engine speed are computed to try to meet the vehicle speed and load requirements imposed by the vehicle speed schedule and the gear-shifting schedule, unless the imposed transient change .
NREL’s Drive Cycle Analysis Tool (DriveCAT) provides drive cycle data—based on .
New European Driving Cycle
In the CO2 emission figure have been added, too. Estimates are available for vehicles back to the model year. On CATA are into effect. Test road e. The procedure involves instrumentation of the test vehicle to collect information while driving on the test road. There are two major types of data to be collected, Driver Behavior data and Vehicle versus Road data. The Vehicle versus Road data are used to prepare the road drive cycle and the Driver Behavior data to prepare the Driver model.
For example, to calculate a vehicle’s fuel consumption either in computer simulation or in chassis dynamo-meter which is going to be launched in India, it must run on an Indian road with an Indian Driver. Indian Drive Cycle with a European driver model does not give a fair comparison of the on road trials. Driving Cycle Design[ edit ] The "Drive-cycle" basically is the representative of the road. Drive cycles are used to reduce the expense of on road tests, time of test and fatigue of the test engineer.
The whole idea is to bring the road to the test lab a chassis dynamo-meter or to the computer simulation. Two kinds of drive cycle can be made. Driving Cycle Recognition[ edit ] Based on the type of application drive cycles are made. Drive cycle for passenger cars are different from commercial vehicle. Driving Cycle Prediction[ edit ] This is a technique for prediction of future driving cycles and patterns for different types of vehicle applications. These cycles are used as an important input in designing and evaluating future power train systems and vehicle concepts.
As of today, obsolete drive cycles are used during the design phase and due to this the changes in traffic conditions and infrastructure which has occurred during the last decade are not taken into account. Therefore, the need for new drive cycles representing today or the next few decades is great. This technique can predict future drive cycle by integrating available measurement data, high-fidelity traffic simulators and traffic models for heavy vehicles. Desirably, traffic simulation models are automatically generated and used to collect predicted drive cycles.
US EPA. Retrieved 26 April