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.
