Evaluation of Tractor-Trailer Combination Braking Performance in Different Operating Conditions

Year 2023, Volume: 27 Issue: 2, 219 - 225, 25.08.2023

Hakan Aykan Kazım Çarman Eyüb Canlı Şerafettin Ekinci

https://doi.org/10.19113/sdufenbed.1191413

Abstract

In the trials of the present work, a double-axle trailer with a carrying
capacity of 6 tons and a hydraulically effective mechanical brake were used as a
tractor towed car. There is a hydraulic brake system on each axle of the agricultural
trailer. In order to separate the brake system on the axles from each other, a
hydraulic mechanically controlled 2/2 directional control valve was mounted on
both hydraulic brake system inlets. The study was carried out at constant speed (25
km h-1), on stabilized road conditions, with 4 different braking modes and 4 different
trailer loads. On stabilized ground, the braking acceleration (deceleration) of the
tractor (without trailer) is 5.51 m s-2. The braking acceleration of the combination is
2.15 m s-2 under the condition that the trailer's carrying capacity was 30% more
loaded and without brakes, and the braking acceleration of the combination was
3.26 m s-2 when braking on both axles (4 wheels). The deceleration of the
combination was above 3.5 m s-2 under the condition of braking on both axles at the
rated load of the agricultural trailer, while it was below the standard value in other
braking approaches.

Keywords

Agricultural tractor, Braking, Deceleration, Trailer

Traktör-Römork Kombinasyonunun Farklı Çalışma Koşullarında Frenleme Performansının Değerlendirmesi

Abstract

Bu çalışmadaki denemelerde 6 ton taşıma kapasiteli çift dingilli, hidrolik etkili
mekanik frenli ve traktörle çekilir römork kullanılmıştır. Tarım römorkunun her iki
dingiline de hidrolik fren sistemi bağlanmıştır. Dingillerdeki fren sistemini
birbirinden ayırmak amacıyla, her iki hidrolik fren sistemi girişine birer adet
hidrolik mekanik kumandalı 2/2 yön kontrol valfi monte edilmiştir. Çalışma sabit
hızda (25 kmh-1), stabilize yol koşullarında, 4 farklı frenleme şekli ve 4 farklı römork
yükünde yürütülmüştür. Stabilize zeminde sadece traktörün (römorksuz) frenleme
ivmesi 5.51 ms-2 olarak bulunmuştur. Römorkun taşıma kapasitesinin %30 daha
fazla yüklü olduğu ve frensiz olduğu koşulda kombinasyonun frenleme ivmesi 2.15
ms-2, her iki dingilde (4 tekerlekte) frenlenme yapıldığı koşulda ise kombinasyonun
frenleme ivmesi 3.26 ms-2 olmuştur. Kombinasyonun frenleme ivmesi, tarım
römorkunun anma yükünde her iki dingilde frenleme yapılması koşulunda 3.5 ms-2
üzerinde iken diğer frenleme uygulamalarında standartlardaki referans değerin
altında kalmıştır.

Keywords

Tarımsal traktör, Frenleme, Yavaşlama, Treyler

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