US 6,746,087 B1 · Electronic equalizing reservoir controller with pneumatic penalty override

Abstract

A control system which allows electro-pneumatic control of an equalizing reservoir with the capacity to create penalty applications in a purely pneumatic manner. A controller for the equalizing reservoir includes an electro-pneumatic source of pressure or atmosphere responsive to an electrical equalizing pressure control signal and a pilot valve selectively connecting the electro-pneumatic source or atmosphere to the equalizing reservoir in response to pressure in a pilot port of the first pilot valve. A magnetic valve is provided having a first input connected to a second source of pressure, a second input connected to atmosphere and an output connected to the pilot port of the first pilot valve. At least one penalty valve is connected to the pilot input of the first pilot valve and is responsive to a penalty signal to connect the pilot input to atmosphere. The pilot valve and the penalty valve pneumatically produce a brake application regardless of the state of the magnetic valve or its controller.

Claims24

Dependent claims

A controller for an equalizing reservoir of a rail brake system which includes a brake pipe controlled by a relay valve in response to pressure in the equalizing reservoir, the controller comprising:

an electro-pneumatic source of pressure or atmosphere responsive to an electrical equalizing pressure control signal;
a first pilot valve selectively connecting the electro-pneumatic source or atmosphere to the equalizing reservoir in response to pressure in a pilot port of the first pilot valve;
a magnetic valve having a first input connected to a second source of pressure, a second input connected to atmosphere and an output connected to the pilot port of the first pilot valve;
and
a penalty valve connected to the pilot input of the first pilot valve and responsive a penalty signal to connect the pilot input to atmosphere.

2 more elements

A controller for an equalizing reservoir of a rail brake system which includes a brake pipe controlled by a relay valve in response to pressure in the equalizing reservoir, the controller comprising:

an electro-pneumatic source of pressure or atmosphere responsive to an electrical equalizing pressure control signal;
a first pilot valve selectively connecting the electro-pneumatic source or atmosphere to the equalizing reservoir in response to pressure in a pilot port of the first pilot valve;
a first magnetic valve having a first input connected to a second source of pressure, a second input connected to atmosphere and an output connected to the pilot port of the first pilot valve;
a second pilot valve having an output connected to the pilot port of the first pilot valve, an input and a pilot port responsive to a suppress signal to disconnect the second pilot valve's input and output;
a first penalty valve connected to the pilot port of the first pilot valve and responsive to a penalty signal to connect the pilot port to atmosphere;
a second penalty valve connected to the input of the second pilot valve and responsive to a penalty signal to connect the input of the second pilot valve to atmosphere;
and
a second magnetic valve having a first input connected to the second source of pressure and a second input connected to atmosphere and an output connected to and providing a suppress signal to the pilot port of the second pilot valve.

5 more elements

Dependencies are inferred from the claim text.

Electronic equalizing reservoir controller with pneumatic penalty override

Life of this patent

Electronic equalizing reservoir controller with pneumatic penalty override

Life of this patent

Abstract

Claims24