الفهرس | Only 14 pages are availabe for public view |
Abstract he repetitive brake process in vehicles, the temperature of the rotating m can reach to 250°C, however, for the brake lining can reach to 300°C. The igh temperature of the drum and linings types with different causing a decrease in the friction coefficient and this leads to decrease the braking force f’the brake system. In this research, the drum brake lining properties of Suzuki an model 2014 car is changed in vehicle Laboratory, Faculty of Industrial Education, Helwan University. In order to study the brake performance at ifferent operation parameters. Therefore, the present research has been carried ut to investigate experimentally the performances of drum brake with three pIes (A.B,C) at different operation parameters. The experimental results showed that, the increase of the brake oil pressure of alues 4, 8, 12, 16 bar respectively at sliding speed 150 r.p.m decreases the ean brake force of the drum brake system with sample C by 3%, 3%, 4%, 4% d 9%, 9.8 %, 10.6%, 11 % respectively for the drum brake system with mple A according to the value ofthe mean brake force of the drum brake with e experimental results indicated also that, the increase of the sliding speed om 50 rpm to 200 r.p.m at brake oil pressure 12 bar decreases the value of the ean brake force of the drum brake system with sample C decreases pproximately by 6%, 6%, 4%, 4% respectively over the value of the mean rake force of the drum brake system with sample B, and the value of the mean rake force of the drum brake system with sample A decreases approximately by 10%. 10.5%, 11 %,1 0.5% respectively over the value of the mean brake force ofthe drum brake system with sample B. The experimental results also illustrated that. the final temperature of the drum brake system with three samples (A,B.C) are increased with increasing the ake oil pressure. At each constant pressure and at sliding speed 200 r.p.m |