Abstract: A hydraulic brake device and a method for controlling the same are disclosed. The disclosed hydraulic brake device determines failure of a booster pressure sensor provided at a hydraulic power unit, using pressure correlation among a master cylinder pressure sensor, a pressure sensor provided at the hydraulic power unit to detect a pressure transferred to a hydraulic pressure controller, and a high pressure accumulator pressure sensor. When there is failure of the booster pressure sensor, the driver is informed of the failure, and a braking operation is carried out, taking into consideration the failure. Accordingly, it may be possible to avoid excessive braking, sudden braking, insufficient braking, etc., and to achieve enhancement in braking sensation and braking force.

Abstract: An airbrake reservoir lock system for an airbrake system of a vehicle is provided. The vehicle has an electronic control module. The airbrake reservoir lock system comprises a primary air reservoir, and a first airbrake reservoir lock. The primary air reservoir has an input port and an output port. The primary air reservoir stores an amount of pressurized air. The first airbrake reservoir lock is disposed in fluid communication with the output port of the primary air reservoir. The first airbrake reservoir lock has a valve portion and an electrical actuator. The valve portion has an open position and a closed position. The electrical actuator positions the valve portion of the first airbrake reservoir lock between the open position and the closed position based upon an output of the electronic control module.

Abstract: An airbrake reservoir lock system for an airbrake system of a vehicle is provided. The vehicle has an electronic control module. The airbrake reservoir lock system comprises a primary air reservoir, and a first airbrake reservoir lock. The primary air reservoir has an input port and an output port. The primary air reservoir stores an amount of pressurized air. The first airbrake reservoir lock is disposed in fluid communication with the output port of the primary air reservoir. The first airbrake reservoir lock has a valve portion and an electrical actuator. The valve portion has an open position and a closed position. The electrical actuator positions the valve portion of the first airbrake reservoir lock between the open position and the closed position based upon an output of the electronic control module.

Abstract: Methods are disclosed for regulating the braking torque generated by the braking system of a vehicle which include a friction lining, a brake surface, an actuator for displacing the friction lining by means of a medium towards he brake surface with a predetermined brake pressure in order to generate the brake torque, the method including restricting the predetermined brake pressure below a maximum brake pressure for the speed of the vehicle only when the actuator is actuated when the vehicle is traveling at a speed below a predetermined speed. Apparatus is also disclosed for carrying out the method.

Abstract: An apparatus and method for enhancing recovery of oil from producing and dormant wells. The invention is embodied in an apparatus in which brine is mixed with a small amount of oil, and then passed through an alternating current flowing between a pair of spaced apart electrodes. The invention is also embodied in a method which shutting in the second well, injecting hydrogen, hot water and steam into the formation via the first well, monitoring formation pressure at the second well until a pressure increase is detected, and recovering fluids including petroleum from said formation via the second well.

Abstract: In a power-brake system, a hydraulic pressure generated by means of a pump may be supplied, controllably in proportion to an actuation force via brake conduits, by a power-brake valve to individual brake cylinders. Control pressure conduits are connected to the brake cylinders or the brake conduits in the vicinity of the brake cylinders and these control pressure conduits are connected to the brake valve. The brake pressure at the brake cylinders may be fed back, via the control pressure conduits, as the control pressure for acting on the control end of the brake valve so that a control of the control plungers of the brake valve is carried out corresponding to the brake pressure build-up at the brake cylinders and, particularly when low brake pressures are desired, rapid pressure build-up times in the brake conduits are ensured.

Abstract: The electronic brake control simulates by electronic means various real changes over time of the pneumatic pressures in a braking system, in particular the pressure in the main air pipe of the train, the pressure in the R containers of the individual wagons and the pressure in the individual brake cylinders. When the brakes are released, the values are determined from these model values and the actually backfed air volume, from which values the pilot control pressure for a relay valve can be increased in order to release the brakes more rapidly. The train model determines, by an adaptive learning method at the end of a brake releasing process, values for the volume of the main air pipe and the R containers of the train, so that the train model adapts itself to the actually existing train.

Abstract: The leakage-type pressure regulator for a hydraulic circuit, including at least one reservoir of fluid under low pressure (5), a pump (11) and an accumulator of fluid under high pressure (9), comprises: a pusher (19) projecting from a chamber (3) connected to the reservoir (5); at least one sensor (27) detecting the position of a magnetic core (23) sliding under the effect of the pusher (19) in the vicinity of the sensor (27), so as to control the functioning of the pump (11); a piston (17) sliding non-sealingly in a bore (7) communicating with a chamber (3) on the one hand and with an outlet of the accumulator (9) on the other hand, so as to establish a leakage of the hydraulic fluid between the accumulator (9) and the reservoir (5), the piston (17) having one end bearing on the pusher (19); and an elastic means (21) opposing the effect of the pressure of the fluid in the accumulator (9) on the piston (17), in such a way that the position of the core (23) is a function of the pressure of the fluid in the acc

Abstract: A modulating valve for railroad car brake cylinders to adapt them for operation with composition brake shoes, in the form of an assembly comprising a bracket plate arranged for connection in the brake cylinder pipe, at a convenient location between the brake cylinder and the AB control valve, in place of a portion of the brake cylinder pipe removed for that purpose, and a modulating valve mounted on the bracket plate and in communication with the brake cylinder pipe and brake cylinder to limit the fluid pressures supplied to the brake cylinder so that composition brake shoes will deliver the proper brake applying force to the truck wheels without interferring with proper operation of existing brake control equipment.

Abstract: A modulating valve for railroad car brake cylinders to adapt them for operation with composition brake shoes, in the form of an assembly comprising a bracket plate shaped for mounting between the brake cylinder pipe flange type fitting that connects the brake cylinder pipe to the brake cylinder and the cylinder head, and that is arranged for a three point securement to the cylinder head, and a modulating valve mounted on the bracket plate and in communication with the brake cylinder pipe and brake cylinder to limit the fluid pressures supplied to the brake cylinder so that composition brake shoes will deliver the proper brake applying force to the truck wheels without interferring with proper operation of existing brake control equipment.