An articulated lorry was instrumented in order to measure its performance in straight-line braking. The trailer was fitted with two interchangeable tandem axle sub-chassis, one with an air suspension and the other with a steel monoleaf four-spring suspension. The brakes were only applied to the trailer axles, which were fitted with anti-lock braking systems (ABS), with the brake torque controlled in response to anticipated locking of leading axle of the tandem. The vehicle with the air suspension was observed to have significantly better braking performance than the steel suspension, and to generate smaller inter-axle load transfer and smaller vertical dynamic tyre forces. Computer models of the two suspensions were developed, including their brakes and anti-lock systems. The models were found to reproduce most of the important features of the experimental results. It was concluded that the poor braking performance of the steel four-spring suspension was mainly due to interaction between the ABS and inter-axle load transfer effects. The effect of road roughness was investigated and it was found that vehicle stopping distances can increase significantly with increasing road roughness. Two alternative anti-lock braking control strategies were simulated. It was found that independent sensing and actuation of the ABS system on each wheel greatly reduced the difference in stopping distances between the air and steel suspensions. A control strategy based on limiting wheel slip was least susceptible to the effects of road roughness.


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    Title :

    An investigation of anti-lock braking strategies for heavy goods vehicles


    Additional title:

    Eine Untersuchung über Antiblockier-Bremsstrategien für Schwerlastkraftwagen


    Contributors:
    Hardy, M.S.A. (author) / Cebon, D. (author)


    Publication date :

    1995


    Size :

    9 Seiten, 13 Bilder, 19 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    An investigation of anti-lock braking strategies for heavy goods vehicles

    Hardy,M.S. / Cebon,D. / Univ.of Edinburgh,Dep.of Civil Engng.,GB et al. | Automotive engineering | 1995



    An Investigation of Anti-Lock Braking Strategies for Heavy Goods Vehicles

    Hardy, M S A / Cebon, D | SAGE Publications | 1995


    Anti-lock braking system for commercial vehicles

    Decker,H. / Emig,R. / Goebels,H. et al. | Automotive engineering | 1988


    Anti-Lock Braking System for Commercial Vehicles

    Decker, H. / Goebels, H. / Emig, R. | SAE Technical Papers | 1988