Abstract: An S-cam brake including a brake chamber to which compressed air is supplied; a slack adjuster rotatably connecting to the brake chamber; an S-cam unit having an S-cam connecting to and rotating around the slack adjuster; and a drum having a lining generating braking force with widening according to rotation of the S-cam is provided, wherein the brake chamber includes an upper housing having an air supply port through which compressed air is introduced; a lower housing coupled to the upper housing to form an internal space; a diaphragm having edges fixed to the upper housing and the lower housing and deformed by compressed air; a piston disposed to contact the diaphragm and move linearly; a piston push rod extending from the piston and having one end connected to the slack adjuster; and a spring having one end supported by the piston and the other end supported by the lower housing, wherein a thickness of the upper housing is greater than a thickness of the lower housing.

Abstract: An air supply device control system may include a sensor configured to detect a trailer to be provided in an eco-friendly commercial vehicle, an air supply device configured to compress and supply air, and a controller electrically connected to the air supply device and configured to control rotation speed of the air supply device to control the air of the air supply device, wherein the controller increases the rotation speed of the air supply device based on whether the trailer is provided in the eco-friendly commercial vehicle, which is detected by the sensor.

Abstract: An apparatus for controlling a change in speed of a vehicle, includes: an auxiliary braking signal unit receiving an auxiliary braking related signal from a driver; a vehicle control unit receiving the auxiliary braking related signal from the auxiliary braking signal unit while controlling the vehicle; a motor control unit receiving a command for auxiliary braking from the vehicle control unit and decelerating the vehicle by regenerative braking of a driving motor; a transmission control unit controlling a transmission during deceleration of the vehicle and transmitting information of whether a change in speed is performed to the vehicle control unit; and a braking control unit connected to a brake through a fluid pressure line, and controlling the brake so that the brake applies braking pressure to a wheel by an amount of reduction in regenerative braking torque when the transmission is downshifted.

Abstract: An S-cam brake including a brake chamber to which compressed air is supplied; a slack adjuster rotatably connecting to the brake chamber; an S-cam unit having an S-cam connecting to and rotating around the slack adjuster; and a drum having a lining generating braking force with widening according to rotation of the S-cam is provided, wherein the brake chamber includes an upper housing having an air supply port through which compressed air is introduced; a lower housing coupled to the upper housing to form an internal space; a diaphragm having edges fixed to the upper housing and the lower housing and deformed by compressed air; a piston disposed to contact the diaphragm and move linearly; a piston push rod extending from the piston and having one end connected to the slack adjuster; and a spring having one end supported by the piston and the other end supported by the lower housing, wherein a thickness of the upper housing is greater than a thickness of the lower housing.

Abstract: An air supply device control system may include a sensor configured to detect a trailer to be provided in an eco-friendly commercial vehicle, an air supply device configured to compress and supply air, and a controller electrically connected to the air supply device and configured to control rotation speed of the air supply device to control the air of the air supply device, wherein the controller increases the rotation speed of the air supply device based on whether the trailer is provided in the eco-friendly commercial vehicle, which is detected by the sensor.

Abstract: A system and a method for automatically controlling an exhaust brake of a vehicle may automatically operate an exhaust brake by automatically recognizing a downhill condition during vehicle traveling. The system and method may automatically operating the exhaust brake by determining whether a current vehicle speed is equal to or greater than a speed limit of a speed limit device together with automatically recognizing a downhill condition, thereby achieving safe traveling together with providing traveling convenience of a driver upon downhill traveling.

Abstract: A system and a method for automatically controlling an exhaust brake of a vehicle may automatically operate an exhaust brake by automatically recognizing a downhill condition during vehicle traveling. The system and method may automatically operating the exhaust brake by determining whether a current vehicle speed is equal to or greater than a speed limit of a speed limit device together with automatically recognizing a downhill condition, thereby achieving safe traveling together with providing traveling convenience of a driver upon downhill traveling.

Abstract: A purge control method of an air tank may include compressing air in an air compressor, removing moisture from the air through a cartridge, storing the air in the air tank, measuring and determining an internal pressure of the air tank after storing the air in the air tank, operating a first solenoid valve if the internal pressure exceeds a first predetermined pressure, determining whether a second solenoid valve is operable and operating the second solenoid valve if operable, operating a purge valve to improve performance of the cartridge, thereby removing the moisture in the air tank, measuring and determining the internal pressure again, and turning off the first and second solenoid valves if the internal pressure is less than a second predetermined pressure.

Abstract: A purge control method of an air tank may include compressing air in an air compressor, removing moisture from the air through a cartridge, storing the air in the air tank, measuring and determining an internal pressure of the air tank after storing the air in the air tank, operating a first solenoid valve if the internal pressure exceeds a first predetermined pressure, determining whether a second solenoid valve is operable and operating the second solenoid valve if operable, operating a purge valve to improve performance of the cartridge, thereby removing the moisture in the air tank, measuring and determining the internal pressure again, and turning off the first and second solenoid valves if the internal pressure is less than a second predetermined pressure.