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240 Landmarks TopChassis > Electronically controlled 4W ALB
 Electronically controlled 4W ALB
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A self-diagnosis circuit was provided in the ECU of the electric control system. When trouble occurred in the system, it notified the driver with an alarm, and operated the system in a safe direction until the danger was over by selecting a method based on the details of the failure.
・Front wheel control system: If a breakdown occurred, power to the front wheel system was cut to activate the normal brakes.
・Rear wheel control system: (1) Provided with a parallel control circuit (backup circuit) and prevented rear wheel lock if trouble occurred in one portion.
(2) The system increased the capacity of the hydraulic accumulators, and issued a warning if the accumulated pressure fell below a set value.
(3) If trouble occurred in the anti-lock brakes, rear wheel lock was prevented using a pressure control valve mechanism.
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Storage location:HONDA COLLECTION HALL (Twin Ring Motegi, 120-1, Hiyama, Motegi-machi, Haga-gun, Tochigi-ken 321-3597)
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Year manufactured:1982
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Manufacturer:Honda Motor Corporation
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Classification:Mass-production part
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Current status:On display (dynamic)
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Model
Familiar name:Electronically controlled 4W ALB
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Model / Weight
Company name:Honda Motor Co., Ltd.
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Location:Honda Collection Hall
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Installation vehicle:Honda Prelude
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Year of manufacture:1982
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Structure, type, means, method, etc.:The system used a computer to instruct the appropriate brake pressure on receipt of signals (slip, speed, deceleration speed, etc.) from the wheel speed sensor installed in each wheel.
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Function, effect, etc.:The brake pressure instruction from the computer had 5 stages. Optimal brake performance and a comfortable brake feeling could be achieved according to the driving and road conditions.
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Technical overview:The system controls wheel lock on emergency braking to stop the vehicle in a stable posture without side slip or spinning while cornering or driving on snowy or frozen roads.
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Features:On emergency braking, the system performed antilock operation at most 10 times per second.
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