Influence ferrous based reinforcements on tribological parameters of aluminum cylinder for piston compressor in brake system of bus

Abstract

Reducing the weight of the built-in parts and reducing the friction on vehicles contributes to reducing fuel consumption. The use of aluminum and its alloys has advantages because of reducing the weight, but there is a problem due to lower strength and poor tribological characteristics of this metal, which is not desirable when aluminum is used for production of piston machines and parts. For the optimization purposes and improvements of the piston compressor tribological properties in the bus braking system (with activation by compressed air), the inner surface of the aluminum cylinder further strengthened with tribological reinforcements. Their task is to reducing friction and wear between the piston (piston rings) and cylinder and to increase strength of the cylinder inner surface. Tribological optimization of the aluminum machine construction has realized by measuring coefficient of friction and wear. According to laboratory research, it is confirmed that tribological properties of the cylinder with tribological reinforcements are better compared to the base construction. Base aluminum cylinder inner surface has roughness due to machining by honing, for proper seating of piston rings.