Method and device for a smooth and timely deceleration or stop in automatic train control

A device for controlling the velocity of a train having an emergency braking system that is only automatically activated when the velocity of the train exceeds a maximum permissible velocity predetermined over a section of track, said device comprising:

• the train having both a conventional braking system and a separate emergency braking system;
• means for communicating said maximum permissible velocity for triggering activation of brake system;
• means for providing notice about an impending alteration of said maximum permissible velocity prior to said maximum permissible velocity being altered to a new maximum permissible velocity;
• and
• means for altering the maximum permissible velocity from the previous maximum permissible velocity to said new maximum permissible velocity
• wherein said emergency braking system is only activated when an actual velocity of the train exceeds the maximum permissible velocity over a predetermined section of track.

A method for controlling velocity of a train having an emergency braking system that is automatically activated only when the velocity of the train exceeds a maximum permissible velocity predetermined over a section of track, said method comprising the steps of:

• providing the train with both a conventional braking system and a separate emergency braking system;
• providing notice about an impending alteration of the maximum permissible velocity over the section prior to the maximum permissible velocity over the section being altered to a new maximum permissible velocity;
• allowing the train to change to new velocity below the new maximum permissible velocity by one of friction and use of the conventional braking system;
• and
• altering the maximum permissible velocity from the previous maximum permissible velocity to said new maximum permissible velocity;
• and
• activating said emergency braking system only when a velocity of the train exceeds the maximum permissible velocity over a predetermined section of track.