Agricultural tractor traction efficiency by changing the mass distribution between axles and speed

Strapasson Neto, Lauro; Laskoski, Maíra; Jasper, Samir P.; Campos, Gabriéle S. de; Kmiecik, Leonardo L.; Parize, Guilherme L.

doi:10.1590/1807-1929/agriambi.v25n4p277-281

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Articles • Rev. bras. eng. agríc. ambient. 25 (4) • Apr 2021 • https://doi.org/10.1590/1807-1929/agriambi.v25n4p277-281 copy

Agricultural tractor traction efficiency by changing the mass distribution between axles and speed¹ 1 1 Research developed at Pinhais, PR, Brazil

Eficiência em tração de trator agrícola alterando a distribuição de massa entre eixos e velocidade

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The traction efficiency of the agricultural tractor can be maximized by adjusting the total mass and its distribution between the axles. The experiment’s objective was to determine the configuration of mass distribution between axles and the displacement speed that provides greater traction efficiency in the harrowing operation. A randomized block design in a 2 × 3 factorial scheme with five replications was used. The first factor was two mass distributions between axles, and the second factor was three gears. The collected data were submitted to analysis of variance and the Tukey test. The condition that maximizes the tractor’s performance corresponds to 39% of the total mass on the front axle and 61% on the rear axle, with a gear that provides speed close to 10 km h^-1.

Key words:
agricultural machinery; specific consumption; dynamic load; harrowing

Mass Distribution Between Axles (MDBA)	.SLP (%)	ER (RPM)	HFC (L h^-1)	DBF (kN)	DS (m s^-1)
39%/61%	8.01 a	1.880 a	18.18 a	21.10 a	7.12 a
46%54%	8.39 a	1.865 a	17.75 a	19.01 b	7.04 b
Gears (G)
MA	7.45 a	1.862 a	15.64 c	19.08 b	5.70 c
MB	8.16 a	1.876 a	17.84 b	19.82 b	6.86 b
MC	9.01 a	1.879 a	20.42 a	21.29 a	8.68 a
F-test
MDBA	2.22 ^ns	4.24 ^ns	1.22 ^ns	52.21 **	40.81 **
G	3.91 ^ns	5.11 ^ns	450.27 **	21.80 **	4.071.76 **
MDBA x G	16.94 **	4.57 ^ns	1.15 ^ns	5.34 *	4.98 ^ns
CV (%)
MDBA	10.97	0.91	5.31	3.54	0.40
G	20.89	0.60	1.78	3.40	0.94
MDBA x G	9.88	0.68	2.29	1.50	1.07
Normality
SW	0.315	0.997	0.998	0.697	0.999
Homogeneity
B₀	0.669	0.159	0.851	0.990	0.662

Mass Distribution Between Axles (MDBA)	PDB (kW)	SFC (g kW h^-1)	YDB (%)	TEE (%)	DL (kN)
39%/61%	42.10 a	376 b	42.74 a	22.91 a	49.61 a
46%54%	37.44 b	413 a	38.01 b	20.89 b	44.18 b
Gears (M)
MA	30.21 c	441 a	30.67 c	19.34 c	46.71 b
MB	37.77 b	402 b	38.34 b	21.20 b	46.85 b
MC	51.33 a	339 c	52.11 a	25.17 a	47.12 a
F-test
MDBA	80.43 **	25.74 **	80.74 **	20.05 *	10.250.91 **
G	840.71 **	372.82 **	840.57 **	419.47 **	21.80 **
MDBA x G	11.41 **	0.33 ^ns	11.40 **	0.41 ^ns	5.34 *
CV (%)
MDBA	3.20	4.46	3.20	5.04	0.28
G	2.63	1.91	2.63	1.88	0.27
MDBA x G	1.74	2.80	1.74	3.22	0.12
Normality
SW	0.373	0.755	0.373	0.826	0.697
Homogeneity
B₀	0.669	0.159	0.851	0.990	0.662

MDBA	Gears (G)
MDBA	MA	MB	MC
Slippage - .SLP (%)
39%/61%	6.43 bB	7.78 aB	9.83 aA
46%/54%	8.47 aA	8.53 aA	8.18 aB
Drawbar force - DBF (kN)
39%/61%	19.63 aC	20.74 aB	22.62 aA
46%54%	18.19 bC	18.89 bB	19.96 bA
Power in the drawbar - PDB (kW)
39%/61%	31.70 aC	40.11 aB	54.48 aA
46%54%	28.71 bC	35.43 bB	48.18 bA
Yield in the drawbar - YDB (%)
39%/61%	32.19 aC	40.72 aB	55.31 aA
46%54%	29.15 bC	35.97 bB	48.91 bA
Dynamic load - DL (kN)
39%/61%	49.40 aC	49.54 aB	49.89 aA
46%54%	44.03 bC	44.16 bB	44.35 bA

Unidade Acadêmica de Engenharia Agrícola Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Campina Grande, PB, Brasil, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

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[1] * Corresponding author - E-mail: laurostrapasson@ufpr.br

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Agricultural tractor traction efficiency by changing the mass distribution between axles and speed1 1 1 Research developed at Pinhais, PR, Brazil

Eficiência em tração de trator agrícola alterando a distribuição de massa entre eixos e velocidade

ABSTRACT

Agricultural tractor traction efficiency by changing the mass distribution between axles and speed¹ 1 1 Research developed at Pinhais, PR, Brazil