Method and device for a smooth and timely deceleration or stop in automatic train control
First Claim
1. 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; and
thereafteraltering the maximum permissible velocity from the previous maximum permissible velocity to said new maximum permissible velocity; and
only activating said emergency braking system when a velocity of the train exceeds the maximum permissible velocity over a predetermined section of track.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and device for effecting a fast but smooth deceleration or stopping of trains controlled under the automatic train control (ATC) system. Under ATC, a permitted maximum velocity is provided as an "ATC condition" to activate the brake system of the train if that velocity is exceeded. When it is necessary to alter the velocity of a train, a control center specifies a feeder section to have the ATC condition to be altered. Next, a substation corresponding to the specified feeder section is provided with notice about the alteration of the ATC condition. The notice includes the impending reduction of velocity. In response, the substation decelerates the train without using the ATC brake system provided on the train. When the train has been sufficiently slowed down such that the alteration of the ATC condition will not result in activation of the ATC brake system, the alteration of the ATC condition is then effected.
24 Citations
16 Claims
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1. 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:
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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; and
thereafteraltering the maximum permissible velocity from the previous maximum permissible velocity to said new maximum permissible velocity; and only activating said emergency braking system when a velocity of the train exceeds the maximum permissible velocity over a predetermined section of track. - View Dependent Claims (2, 3, 4, 5, 6, 12, 13)
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7. 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:
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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. - View Dependent Claims (8, 9, 10, 11, 14, 15)
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16. 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:
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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.
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Specification