Throttle-off Turn-in

A Throttle-off turn-in event simulates the dynamics of a vehicle driving a constant radius turn at steady state, the reaction of the vehicle due to a sudden removal of drive torque during the cornering event.

The event includes a short straight section to allow the vehicle to come to steady state, the constant radius circle, and throttle removal. The event is designed to simulate a highway exit ramp maneuver. Appropriate vehicle and tire output requests are included. A plot template is available to plot the results.

The event is similar to Throttle-off Cornering.


Figure 1.


Figure 2.
The parameters available in the Throttle off turn in event are detailed in the following table:
Parameter Description
Radius The radius of the circle that the vehicle CG will follow during the constant radius portion of the event (meters).
Initial straight The distance the Vehicle is driven straight and it attains the steady state (meters).
Turn direction Direction the vehicle turns during the event (as seen by the driver)
Velocity The defined speed of the vehicle during the event (meters/sec).
Look ahead time Drive Model look ahead time (seconds).
Prediction step size Defines the output data step size in seconds (if the number is .02, data is output every .02 seconds).
Throttle off time The absolute time in the simulation that the throttle controller begins removing drive torque (seconds).
Throttle step duration The length of the time the throttle controller takes to completely remove the drive torque.
Steer ramp time  
Steer ramp rate  
End time Absolute end time of the event, in seconds.
Print interval Data is output to the plot files and graphics file at this time interval (seconds).

Reference

ISO 9816-2006 Passenger cars — Power-off reaction of a vehicle in a turn.