Bendix Commercial Vehicle Systems LLC

Brian J Riley

Paul C Niglas

Chandra Sekhar Mulakala

Venkateswararao Nakka

A trailer control valve for a tractor includes a body defining a supply port and first and second delivery ports. The supply port is configured for fluid communication with a fluid source on the tractor. The first and second delivery ports are configured for fluid communication with glad-hand connectors through which fluid is supplied from the tractor to a trailer. A pressure sensing solenoid receives fluid signal from each of the first and second deliver ports and selectively passes fluid signal therefrom to a pressure sensor as a function of a brake control signal received by a controller that controls the pressure sensing solenoid.

Trailer detection and control module

A trailer control valve for a tractor includes a body defining a supply port and first and second delivery ports. The supply port is configured for fluid communication with a fluid source on the tractor. The first and second delivery ports are configured for fluid communication with glad-hand connectors through which fluid is supplied from the tractor to a trailer for, respectively, releasing a parking brake and applying a service brake. The first delivery port is in fluid communication with the supply port. A relay valve is supported within the body and includes a valve member configured to move between positions preventing and permitting fluid communication between the supply port and the second delivery port. Pressure transducers in the body generate pressure signals indicative of fluid pressure at the delivery ports permitting detection of the presence of a trailer coupled to the tractor.

Trailer control valve with integrated trailer supply

A fastener-less valve cover plate assembly that can be used to enclose a pressure chamber, such as a valve chamber of a relay valve. Installation of the components of the fastener-less valve cover plate assembly is simplified as compared to prior art cover plates utilizing fasteners, while still providing suitable performance. In addition, the fastener-less valve cover plate assembly is not readily disassembled with common tools thereby discouraging tampering.

Pneumatic valve/pressure vessel plastic metal composite cover with bayonet retention feature

A valve assembly including a fastener-less subcomponent. Installation of the subcomponent is simplified as compared to cover plates utilizing fasteners, while still providing suitable performance. In addition, the fastener-less subcomponent is not readily disassembled with common tools thereby discouraging tampering. The subcomponent includes bayonet style features for interlocking with structure of a valve housing to lock the subcomponent in position.

Pneumatic valve/pressure vessel subcomponent with bayonet retention feature

A trailer control valve comprises a valve electronic control port adapted to receive an electronic control signal; a valve pneumatic supply port unrestrictedly fluidly communicating with a first supply of a pneumatic fluid; a valve pneumatic control port normally proportionally fluidly communicating with a second supply of the pneumatic fluid based on a pressure representing a driver brake demand, the first supply of the pneumatic fluid being in an independent pneumatic circuit from the second supply of the pneumatic fluid; and a valve delivery port selectively fluidly communicating with at least one of the valve pneumatic supply port and the valve pneumatic control port based on the electronic control signal, the pressure representing the driver brake demand and a pressure of the first supply of the pneumatic fluid. A first pneumatic check valve includes a first check valve supply port fluidly communicating with the first supply of the pneumatic fluid; and a first check valve delivery port fluidly communicating with the relay valve pneumatic supply port. The first pneumatic check valve controls the fluid communication of the first supply of the pneumatic fluid with the relay valve pneumatic supply port based on the pressure of the first supply of the pneumatic fluid at the valve pneumatic supply port.

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New London, OH, United States of America

Brian J Riley