VLIV ZATÍŽENÍ SPALOVACÍHO MOTORU NA ENERGETICKÉ A VÝKONNOSTNÍ PARAMETRY TRAKTOROVÝCH SOUPRAV

Abstract

The objective of this paper is to demonstrate possibilities how to reduce consumption of Diesel fuel on the one hand and to increase the performance of tractor aggregates on the other. Measurings were performed on a field with clayey-loamy soil, after the harvest of spring barley as forecrop and treatment of soil surface with disc harrowing. At the moment of measuring, the upper soil layer (till 10 cm) contained 16.5 % of humidity. Measured were the following parameters: consumption of Diesel fuel, engine revolutions, total time of ploughing, time of turning, depth of ploughing, and the swath of tractor aggregate. The specific consumption of diesel fuel Qm,1 and the efficiency (performance) of the aggregate W1 were calculated using the aforementioned parameters. The experimental tractor operated always with the full dose of fuel. Measurings were performed within zones A – economic revolutions of the engine (1 580–1 800 min−1) and B – maximum working revolutions of the engine (1 800–2 000 min−1). Basing on measured values it was found out that in zones A and B, the ploughing aggregate Case Magnum MX 285 plus a combined cultivator Köckerling Exaktgrubber – Vario showed 9.1 % of fuel saving. Values of efficiency increased by 11.5%. For the ploughing aggregate Case Magnum MX 285 plus the disc harrow Väderstad Excellent XT 620 the corresponding fuel saving was 17.2 %) while the value of efficiency increased by 7.2 %).