摘要:
An air dryer and reservoir assembly for providing compressed air from an air compressor (20) on a heavy motor vehicle which includes an air dryer (14) connected to receive compressed air from the air compressor (20) and a secondary reservoir (12), including an integral purge volume (34), for storing compressed air which passes through the air dryer (14), with the air dryer (14) and the secondary reservoir (12) being securely attached to a housing (16) to form an air dryer reservoir module (10). A primary reservoir (18) for storing compressed air from the air dryer (14) is located remote from the air dryer reservoir module (10). A pressure equalizing mechanism (57) is disposed between the primary reservoir (18) and the secondary reservoir (12) for keeping pressure in the two reservoirs (12, 18) equal. Components located within the housing (16) control air flow between the air dryer (14) and the primary and secondary reservoirs (18, 12) and also monitor the pneumatic brake system circuits fed by the primary and secondary reservoirs (18, 12).
摘要:
A serviceable filtering oil removal cartridge (20) for use in a compressed air assembly of a vehicle air brake system includes a housing having (22) a first end (24) and a second end (24). A filtering element (30) is disposed within the housing for agglomerating and removing oil from compressed air entering the oil removal cartridge. A load plate (46) is disposed within the housing for supporting the filtering element. The load plate includes a connecting portion (56) dimensioned to allow the oil removal cartridge to be removed and installed as a single unit. The connecting portion (56) is preferably a threaded annulus.
摘要:
A pneumatic actuator (50) is integrated into a foot control valve(20). It includes a pneumatically activated piston that applies a force to the foot control valve primary piston (32) which, in turn, applies the vehicle brake system. The piston is configured to allow the pedal or treadle actuated plunger (54) to push through the pneumatic actuator and apply the brake system. This finds particular use as an add-on feature for pre-trip inspection systems, as a working brake system, etc.
摘要:
A night vision clearance light (10') assembly includes a shell (22), an array of visible light emitting elements (24), and a night vision device (30). The visible light emitting elements (24) are preferably LEDs mounted on a ring (26) received in the shell (27). The night vision device (30) is operatively connected to an associated night vision camera and sees through an opening (37, 34) in the ring (26) and the lens (22). The assembly is easily mounted in a standard factory-cut clearance light housing in the exterior of a truck cab.
摘要:
A control module or manifold (A) allows the mounting or insertion of push-to-connect fittings to integrated or premounted connectors or parts. Additional connectors can also be added as need witout disassembly or disconnection of the manifold. A seal is created from the elements to protect the unused fittings via a frangible wall located between aligned recesses (20, 22, 24, 26, 28, 30) in the manifold housing. A thin walled region encloses a knock-out portion of the wall and is preferably located at right angles to the center line of the recesses at a predetermined depth.
摘要:
A desiccant type air dryer (10) for an air supply system for a motor vehicle brake system. The air dryer incorporates features for convenient mounting and dismounting of a desiccant cartridge (12) to the air dryer body (14) assembly. This connection is achieved through the use of an externally accessible through bolt (84) which passes through the body assembly and engages a central threaded boss (44) on the load plate (34) of the dessicant cartridge. Interlocking engagement between the desiccant cartridge and body assembly prevents these parts from rotating relative to one another during mounting and dismounting of the cartridge. The desiccant cartridge is readily removed through engaging the through bolt driving head (90) using conventional tools.
摘要:
A lightweight, non-metallic valve is preferably formed of molded plastic. The valve (50) has an hour-glass configuration or enlarged recesses formed therein to reduce the overall mass of the assembly and provide increased sensitivity to low flow rates. Sealing O-rings (62) are snap fit into grooves (60) at opposite ends of the symmetrical assembly.
摘要:
An electronic air charge controller for a tractor trailer vehicle air brake system includes a micro controller, a first pressure sensor interface coupled to the micro controller, a second pressure sensor interface coupled to the micro controller, and a vehicle control protocol interface coupled to the micro controller. The micro controller, in response to a signal received from the first pressure sensor interface indicative of an air supply recharge condition, a signal received from the second pressure sensor indicative of parking brake engagement condition, and a signal from the vehicle control protocol interface indicative of an engine start condition, supplies a maximum engine speed control signal to the vehicle control protocol interface. The time required to charge the air supply system to the required normal operating level is thereby minimized. In addition, a transmission sensor interface is preferably coupled to the micro controller. The micro controller does not generate the maximum engine speed control signal unless a signal supplied by the transmission sensor interface indicates that an automatic transmission is in park or a manual transmission is in neutral. Still further, to improve operating efficiency, a vehicle load condition signal is supplied by the vehicle control protocol interface to the micro controller. In response, the micro controller supplies a pause air compressor charging cycle signal or a pause air dryer recycle signal to the vehicle control protocol interface, if either the air compressor or air dryer is operating when a high load condition is encountered.
摘要:
An air dryer, used in a compressed air system, includes an oil coalescing element for agglomerating oil in compressed air passing through the oil coalescing element in a first direction during a charging cycle and passing through the oil coalescing element in a second direction during a purging cycle. A drying material, which is downstream of the oil coalescing element during the charging cycle and upstream of the oil coalescing element during the purging cycle, reduces moisture in the compressed air during the charging cycle.
摘要:
A method and apparatus for graphically monitoring and controlling a vehicle anti-lock brake system is provided. Multiple types of graphical data concerning different aspects of the anti-lock brake system are simultaneously displayed to a technician. Output lights provided as a part of the vehicle anti-lock brake system are graphically emulated on a display terminal. Various vehicle anti-lock brake system components, such as a retarder relay, modulators, indicator lights, and the like, are controllable through a graphical user interface, and both the presence and location of anti-lock brake system faults is graphically indicated to a technician. The method and apparatus also include graphically displaying real-time or previously recorded wheel speed data for all or selected individual wheels connected to a vehicle anti-lock brake system, alone or in combination with other graphical data, and for saving real-time wheel speed data for subsequent review. Communications data sent to and from the anti-lock brake system electronic control unit is also graphically displayed to a technician.