An automatic retainer valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a brake pipe and reference volume in fluid communication with a first end of the valve, a brake cylinder in fluid communication with a second end of the valve, and an exhaust port defined in the body and positioned between the first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a brake cylinder pressure exceeding a reference volume pressure. The brake cylinder pressure may push the at least one piston towards the first end of the valve until the brake cylinder pressure equalizes with the reference volume pressure.

A control valve for an automatic parking brake having an inlet for coupling to a source a brake pipe pressure, an outlet for coupling to a control inlet of the automatic parking brake and a pilot for coupling to the source of brake pipe pressure. The control valve is moveable between a first position where the inlet is in communication with the outlet and a second position where the inlet and the outlet are isolated from each other in response to a predetermined amount of brake pipe pressure at the pilot. The control valve includes a spring biasing the control valve into the first position.

An automatic retainer valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a brake pipe and reference volume in fluid communication with a first end of the valve, a brake cylinder in fluid communication with a second end of the valve, and an exhaust port defined in the body and positioned between the first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a brake cylinder pressure exceeding a reference volume pressure. The brake cylinder pressure may push the at least one piston towards the first end of the valve until the brake cylinder pressure equalizes with the reference volume pressure.

A system includes a machine assembly, an imaging sensor, an encoder, and one or more processors. The machine assembly is movable to actuate a brake lever of a vehicle in order to open a valve of an air brake system of the vehicle. The imaging sensor acquires perception information of a working environment that includes the brake lever. The encoder detects a displaced position of the machine assembly relative to a reference position of the machine assembly. The one or more processors detect a position of the brake lever relative to the machine assembly based on the acquired perception information and the detected displacement of the arm. The one or more processors generate a motion trajectory for the machine assembly that provides a path to the brake lever. The one or more processors drive movement of the machine assembly along the motion trajectory towards the brake lever.

A brake controller having independently adjustable friction and detent torque to allow for easy adjustment of handle feel without changing or replacing components. The brake handle is coupled to a cam that rotates with the handle and has a series of divots in its outer circumference corresponding to established brake handle positions. A detent roller is biased by an adjustable spring into engagement with the outer circumference of the cam and thus into the divots when the handle is moved. A separately adjustable spring biases a lateral surface of the cam into engagement with a frictional surface. Independent adjustment of the two spring can adjust both detent and friction torque, thus allowing a user to easily adjust handle feel without having to change or replace handle components

A locomotive brake controller that has a body configured to interconnect to a desktop location in the cab of a locomotive and a mount that can attach the base of the controller to a vertical stand in the cab of a locomotive. The controller also includes an operator interface adaptor that can be clocked relative to the body and an operator face plate that can be clocked relative to the mount depending on the location of installation to ensure proper tilting of the interface relative to the operator and proper orientation of the operator display. Alternatively, the adaptor may include a fixed face plate that includes a moveable display and an adhesive membrane with operator buttons to properly orient the display.

A modular EAB system that reduces the number of individualized modules but provides the desired functionality using a configuration module that is coupled to a plurality of brake system control modules and has a receptacle interface configured to engage a series of modular sections that can be selected from a variety of options to perform dedicated air brake functions. The dedicated air brake functions included comprise brake pipe cutout, equalizing reservoir backup, brake pipe emergency, automatic flow calibration, dead engine regulator, dynamic brake interlock, emergency limiting valve regulation, dynamic brake interlock and emergency limiting valve regulation, 20 pipe back up, and brake cylinder cutout.

A system is provided that includes a machine assembly, a first imaging sensor, an encoder, and one or more processors. The machine assembly is movable to actuate a brake lever of a vehicle in order to open a valve of an air brake system. The first imaging sensor is positioned to acquire two-dimensional perception information of a working environment that includes the brake lever during movement of the machine assembly towards the brake lever. The encoder detects a displacement of the machine assembly relative to a reference position of the machine assembly. The one or more processors estimate a target position of the brake lever relative to the machine assembly during movement of the machine assembly based on the two-dimensional perception information and the displacement. The one or more processors drive the movement of the machine assembly towards the target position of the brake lever.

An outdoor grounds maintenance vehicle is self-propelled by a hydrostatic traction drive system that provides dynamic braking to the vehicle without the need for separate service brakes acting on the wheels of the vehicle. An engine kill device can be manually actuated by the operator to access the dynamic braking of the traction drive system by reducing the speed of the prime mover that powers the pump of the traction drive system. This provides an auxiliary braking system that can be used in an emergency or on demand by the operator in the event the accelerator pedal does not properly control the pump swashplates. The operator can control the rate at which the auxiliary brake system reduces the speed of the prime mover to zero.

Systems and methods are provided for an automation system. The systems and methods calculate a motion trajectory of a manipulator and an end-effector. The end-effector is configured to grasp a target object. The motion trajectory defines successive positions of the manipulator and the end-effector along a plurality of via-points toward the target object. The systems and methods further acquire force/torque (F/T) data from an F/T sensor associated with the end-effector, and adjusts the motion trajectory based on the F/T data.