Parking braking in vehicles having conventional braking systems
AssigneeMeritor Heavy Vehicle Systems, LLC
InventorsDenis John McCann, Andrew John Ward
Life of this patent
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Abstract
A parking braking system in a vehicle not having EBS wherein, for parking braking, the brakes are arranged to be supplied with actuating fluid from a pressure source under the control of a manually operated electrical device and wherein, upon selecting parking braking by actuation of the electrical device, the brakes are arranged to be applied and mechanically locked or latched in place.
Claims24
A parking braking system in a vehicle not having EBS wherein, for parking braking, wheel brakes are arranged to be supplied with actuating fluid from a pressure source under the control of a manually operated electrical device (22) and wherein, upon selecting parking braking by actuation of the electrical device (22), the brakes are arranged to be applied and mechanically locked or latched in place with a mechanical latch/lock comprising a stop device, which when actuated, moves into a position to mechanically hold the brake in a parking braking condition, irrespective of whether the brake force generated is then reduced.
A parking braking system in a vehicle not having EBS wherein, for parking braking, wheel brakes are arranged to be supplied with actuating fluid from a pressure source under the control of a manually operated electrical device (22) and wherein, upon selecting parking braking by actuation of the electrical device (22), the brakes are arranged to be applied and mechanically locked or latched in place and wherein following actuation of the manually operable electrical device (22), the initiation of the latching action is provided by a feedback quantity, taken from the sensed actuation level being exerted in the brake, reaching a preset or controlled level.
A parking braking system in a vehicle not having EBS wherein, for parking braking, wheel brakes are arranged to be supplied with actuating fluid from a pressure source under the control of a manually operated electrical device (22) and wherein, upon selecting parking braking by actuation of the electrical device (22), the brakes are arranged to be applied and mechanically locked or latched in place with a mechanical latch/lock comprising a stop device which, when actuated, moves into a position to mechanically hold the brake in a parking braking condition, irrespective of whether the brake force generated is then reduced, said stop device being constructed so as to be capable of mechanically holding the brakes in any of a range of park load levels wherein the stop device comprises a rotatable cam (250) which engages an operating or input lever or shaft (252) If the brake for maintaining the brake in a selected parking braking condition.
A parking braking system in a vehicle not having EBS wherein, for parking braking, wheel brakes are arranged to be supplied with actuating fluid from a pressure source under the control of a manually operated electrical device (22) and wherein, upon selecting parking braking by actuation of the electrical device (22), the brakes are arranged to be applied and mechanically locked or latched in place with a mechanical latch/lock comprising a stop device which, when actuated, moves into a position to mechanically hold the brake in a parking braking condition, irrespective of whether the brake force generated is then reduced, said stop device being constructed so as to be capable of mechanically holding the brakes in any of a range of park load levels wherein the stop device comprises a wedge (54) which is arranged to be selectively driven by a controlled actuator into engagement with an operating or input lever or shaft (203) of the brake to maintain the brake in a selected parking braking condition.
Dependencies are inferred from the claim text.