A hybrid drive system and associated methods are described that include an internal combustion engine, an electric motor, and a liquid cooling system. In one example, the liquid cooling system includes an oil circulation system that cools selected components, and lubricates selected components.

A hybrid drive system and associated methods are described that include an internal combustion engine, an electric motor, and a liquid cooling system. In one example, the liquid cooling system includes an oil circulation system that cools selected components, and lubricates selected components.

A brake retarder valve for a tractor-trailer combination includes a valve housing and a valve assembly. The valve assembly includes a poppet valve biased by a spring and a gravity spool. The valve assembly is selectively operable between the operative closed configuration and an open configuration in response to a resultant of the fluid pressure between a trailer axle brake and a tractor axle brake. The tractor axle brake is actuated with a time delay from actuation of the trailer axle brake. This delay is actuation of the tractor axle brake prevents jack knifing of the trailer onto the tractor in a tractor-trailer combination, thereby ensuring safety during operation of a tractor-trailer combination.

Venting a cylinder of a piston-cylinder unit of a power brake pressure generator of a hydraulic power brake system for a motor vehicle. A piston in the cylinder is displaced from a forward-displaced position back into a home position and subsequently forward again. When the piston is displaced back, a connection valve is closed so that the piston sucks brake fluid from a brake fluid container, the brake fluid flowing over a lip seal acting in the manner of a pressure relief valve as the first piston seal. During the forward stroke, the piston pushes brake fluid through the then open connection valve into the brake fluid container. Any air contained in the cylinder is pushed with the brake fluid from the cylinder and separates from the brake fluid in the brake fluid container.

A device for controlling a deceleration system of a vehicle includes an input port configured to receive a fluidic main deceleration request, and an output port configured to supply an electric deceleration demand to the deceleration system. The device is configured to generate the electric deceleration demand according to the fluidic main deceleration request. A deceleration system, a vehicle, a method and a computer product are also disclosed.

A method for fault detection in a vehicle dynamics control, in a system which includes a power brake and a vehicle dynamics control and is configured to couple the power brake hydraulically to the vehicle dynamics control. The method includes: generating a first control signal and providing the first control signal to the vehicle dynamics control to provide a first hydraulic pressure using the vehicle dynamics control; generating the first hydraulic pressure by means of the vehicle dynamics control, wherein a second hydraulic pressure at the hydraulic coupling is controlled using the power brake in such a way that a hydraulic volume in the system remains constant; wherein, after the process of generating the first hydraulic pressure has ended, a third hydraulic pressure of the vehicle dynamics control is determined at the hydraulic coupling to detect a fault in the vehicle dynamics control.

A method for fault detection in a vehicle dynamics control, in a system which includes a power brake and a vehicle dynamics control and is configured to couple the power brake hydraulically to the vehicle dynamics control. The method includes: generating a first control signal and providing the first control signal to the vehicle dynamics control to provide a first hydraulic pressure using the vehicle dynamics control; generating the first hydraulic pressure by means of the vehicle dynamics control, wherein a second hydraulic pressure at the hydraulic coupling is controlled using the power brake in such a way that a hydraulic volume in the system remains constant; wherein, after the process of generating the first hydraulic pressure has ended, a third hydraulic pressure of the vehicle dynamics control is determined at the hydraulic coupling to detect a fault in the vehicle dynamics control.

Disclosed are an electronic control brake system and a method for controlling the same. The method for controlling an electronic control brake system of a vehicle according to the present disclosure, in which a service brake is configured to provide a braking force by hydraulic pressure to each wheel and a drum in hat (DIH) brake is configured to provide a parking brake force to each of the wheels by pulling a parking cable, the method including determining whether rocking of the vehicle occurs due to a weight shift of the vehicle at the DIH brake on the basis of operation information of an electronic parking brake (EPB) system configured to adjust a braking force of the DIH brake, state information of a transmission gear, and state information of a brake pedal; and when the rocking of the vehicle is determined to occur, automatically operating the service brake.

Systems and methods for emergency brake systems are provided herein. In this regard, a brake system may comprise a summing lever having a first end and a second end, a brake handle coupled to the first end of the summing lever, the brake handle rotatably coupled about a first axis, and a linear actuator having a plunger, the plunger being coupled to the second end of the summing lever. In various embodiments, an idler link may be coupled between the brake handle and the first end of the summing lever. The brake system may further comprise a brake cable coupled between the summing lever and a brake metering valve. The brake metering valve may be actuated in response to at least one of the brake handle being rotated about the first axis or the linear actuator being actuated.

A low-pressure vehicle braking system and method of operation that controls the supply of brake fluid based on the pressure differential between left and right master cylinders associated with the different wheel brakes allowing for pressure harmonization between the left and right wheel brake circuits and a brake system module suitable for installation on an existing vehicle.