ENGINEERING STUDY ON THE EGYPTIAN RURAL CAR MANUFACTURED LOCALLY

Radwan, G. R.; Salim, R. G.

doi:10.21608/mjae.2015.98578

ENGINEERING STUDY ON THE EGYPTIAN RURAL CAR MANUFACTURED LOCALLY

Document Type : Original Article

Authors

Senior Researcher in Agric. Eng. Res. Inst., Egypt.

10.21608/mjae.2015.98578

Abstract

Studied Egyptian rural cars are the agricultural machines which fitted locally with small diesel engines (11 Hp) of irrigation pump and prevalent in the Egyptian countryside, especially delta province. Besides their on-farm application in Egypt, they are also engaged in transportation of agricultural products and human beings on rural roads, variety loads, different forward speeds and multiple models. In spite of their adverse effects due to by luck construction on operators and bystanders, limited information is available concerning the center gravity, rolling resistance and slippage investigation of these local modified machines. This study focused on three types of spreading model in the Egyptian countryside rural car, (pulling of trailer and irrigation crops [PI], Self-propelled trailer and irrigation crops [SI] and Transport and irrigation of crops [TI], three levels of rural car load (0, 550, and 850 kg) and four levels of rural car forward speed (8.5, 9.6, 10.8 and 11.5 km/h). So the objectives of this research were to study the center gravity trends, slippage as well as rolling resistance characteristics and tractive coefficient of Egyptian rural car on above studied different factors in transportation conditions. During measurement and recording the center gravity, slippage and rolling resistance of the rural car, the engine horse power, type of road and also tire sizes as well tires pressure air were fixed to cover the most normal range of the rural car operation in transportation conditions for the field land. The test sites were prepared according to standard measurement test procedures. The results show that the maximum of the traction efficiency 74 % was achieved at forward speed 8.5 km/h, self-trailer and irrigation crops (SI) and rural car load 850 kg. The overall slippage in this case is about 6.5 % lower than the two types of models. In the event that (μ > 2h/L) (Contiguity coefficient between the tire and the road, μ > coefficient of friction, tan β, (h/b) mean that the likelihood of rollover is greater than sliding and vice versa

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